Article
Chemistry, Multidisciplinary
Xiangsi Liu, Ziteng Liang, Yuxuan Xiang, Min Lin, Qi Li, Zigeng Liu, Guiming Zhong, Riqiang Fu, Yong Yang
Summary: The recent applications of solid-state nuclear magnetic resonance (ssNMR) and magnetic resonance imaging (MRI) techniques in Li/Na batteries are reviewed, emphasizing the importance of investigating battery materials structure, solid electrolyte interfaces, and in situ research.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Physical
Fengkai Zuo, Hao Zhang, Minhui Liu, Jie Liu, Yongshuai Liu, Yuhao Li, Hengjun Liu, Fangchao Gu, Qiang Li, Linyi Zhao, Chunlin Yi, Yu Ding, Laifa Shen, Hongsen Li
Summary: Researchers elucidate the physical and chemical origin of the performance mismatch between sodium-ion batteries and lithium-ion batteries. They find that the insufficient specific capacity of sodium-ion batteries is due to the inferior depth of conversion chemistry and limited redox reversibility of discharged products. In addition, the presence of spin-polarized capacitance further exacerbates the differences in electrochemical properties between the two systems.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Physical
Mihit H. Parekh, Manikandan Palanisamy, Vilas G. Pol
Summary: The development of reserve lithium-ion batteries (RLIBs) for Li+ ion free V2O5 cathodes with graphitic anodes has achieved high charge capacity and stable cycling performance. This technology offers potential applications for other Li+ ion free cathodes, such as vanadium oxides, sulfur, FeS2, MnO2, etc.
Article
Chemistry, Multidisciplinary
Jiang Cui, Hongkui Zheng, Kai He
Summary: Conversion-type materials are being explored as potential high-energy-density alternatives for rechargeable ion batteries, with in situ TEM being extensively employed to provide mechanistic insights into the behavior of battery materials. This review comprehensively summarizes recent developments in in situ TEM techniques for investigating dynamic phase transformation and associated structural, morphological, and chemical evolutions during conversion reactions with alkali ions in secondary batteries, with a special emphasis on spinel metal oxides and 2D metal chalcogenides. Unique scientific findings obtained through in situ TEM are highlighted, addressing fundamental questions and practical issues related to phase transformation, structural evolution, electrochemical redox, reaction mechanism, kinetics, and degradation.
ADVANCED MATERIALS
(2021)
Article
Energy & Fuels
Hyocheol Lee, Anjali Nagapadi Preman, Thuan Ngoc Vo, Jin-Hyeong Lee, Il Tae Kim, Suk-kyun Ahn
Summary: In order to overcome the rapid capacity decay of silicon as a battery material, researchers have synthesized a series of multifunctional acrylic random copolymer binders and modulated their adhesive and mechanical properties. By adding acrylic acid and glyceryl groups, these binders can undergo in situ crosslinking at lower temperatures, leading to improved electrochemical performance.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Yangmingyue Zhao, Libo Li, Yuhang Shan, Da Zhou, Xiaochuan Chen, Wenjun Cui, Heng Wang
Summary: To enhance the conductivity and charge/discharge performance of polymer electrolytes (PEs) for solid-state lithium-ion batteries (SLIBs), a PE structure called LOPPM (LiTFSI/OMMT/PVDF/P(VDF-HFP)/PMMA) was prepared using polyvinylidene fluoride (PVDF), poly(vinylidene fluoride-hexafluoro propylene) (P(VDF-HFP)), and polymerized methyl methacrylate (MMA) monomers. The LOPPM PE exhibited high ionic conductivity of 1.1 x 10(-3) S cm(-1) and a lithium-ion transference number of 0.54. The capacity retention of the battery remained 100% after 100 cycles at room temperature and 0.5 C. The initial capacity of the second-recycled LOPPM PE was 123.9 mAh g(-1). This work provides a feasible pathway for developing high-performance and reusable LIBs.
Article
Chemistry, Physical
Yi Shen, Bingchen Zou, Zidong Zhang, Maoshu Xu, Sheng Wang, Qixing Li, Haomiao Li, Min Zhou, Kai Jiang, Kangli Wang
Summary: In this study, the A-scan and 2D/3D Total Focusing Method (TFM) ultrasonic detecting technologies were used to monitor and image the battery's abnormal behavior under overcharging in real time. The ultrasound wave behavior during the charging and discharging process was examined to understand its relationship with lithiation/de-lithiation, volume changes, concentration polarization, and temperature elevation. The ultrasonic detecting technique showed an early-warning characteristic, being able to detect the onset and location of side reactions as early as 102% SoC after overcharging begins, and accurately differentiate various overcharged states with an accuracy of 0.4% SoC. The precision of ultrasonic detecting technologies allows for timely remedy and extends the lifespan of batteries.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Physical
S. Y. Zhu, Y. F. Yuan, P. F. Du, M. Zhu, Y. B. Chen, S. Y. Guo
Summary: This study focuses on improving the lithium storage performance of MnS by addressing its low conductivity and volume variation issues through a novel synthesis strategy and composite structure. The composite material consists of alpha-MnS nanoparticles grown within a 3D macroporous honeycomb carbon framework. The composite demonstrates enhanced specific capacity, cycling durability, and rate capability, as well as excellent kinetics properties, thanks to the smart design of the confined alpha-MnS nanoparticles.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Mengjun Wu, Dan Liu, Deyu Qu, Jiaheng Lei, Xiong Zhang, Hanping Chen, Haolin Tang
Summary: A solid composite polymer electrolyte with dual-interface compatibility is designed to address the interfacial incompatibility issues and uncontrolled dendrite growth in all-solid-state lithium-metal batteries. It exhibits high performance in reversible lithium plating/stripping and long-term cycling stability, indicating the effectiveness of constructing solid-state electrolytes with dual-interfacial compatibility.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Review
Chemistry, Physical
Wenzao Li, Diana M. Lutz, Lei Wang, Kenneth J. Takeuchi, Amy C. Marschilok, Esther S. Takeuchi
Summary: To overcome the limitations of static and destructive characterizations of Li-ion battery materials and components, a comprehensive investigation over various length and time scales is essential. Emerging in situ and operando characterization methodologies focusing on multiple size domains are a powerful approach to resolve current challenges and navigate future directions. The necessity and opportunity for in situ and operando characterization of electrochemical energy storage materials and systems are discussed, along with suggestions for future directions to tackle currently intractable issues on Li-ion battery application, failure, and emerging design concepts.
Article
Electrochemistry
Xiaohua Huang, Renqing Guo, Yan Lin, Yiqi Cao, Jianbo Wu
Summary: Si/SiC/C in-situ composite microspindles were fabricated using Zn2SiO4/C nanowire bundles obtained from hydrothermal synthesis and magnesiothermic reduction. SiC and C components were uniformly distributed at the nanoscale level within the microspindle particle, strengthening the structure. As an anode material for lithium-ion batteries, the Si/SiC/C composite microspindles exhibited excellent cyclic and rate performances, outperforming pure Si microspindles.
ELECTROCHIMICA ACTA
(2022)
Review
Energy & Fuels
Yu Tian, Cheng Lin, Hailong Li, Jiuyu Du, Rui Xiong
Summary: This study reviews recent progress in developing methods for in-situ detecting lithium plating, categorizing these methods into electrochemical and physical methods and discussing trends for future development of novel technologies.
Review
Materials Science, Multidisciplinary
Feipeng Yang, Xuefei Feng, Y. -Sheng Liu, Li Cheng Kao, P. -A. Glans, Wanli Yang, Jinghua Guo
Summary: Researchers are aiming to develop alternative battery systems with low cost and high material abundance beyond lithium-ion batteries, emphasizing the importance of understanding the chemical and electronic structure of materials. Soft X-ray spectroscopy, as an element-specific technique, can be applied to study electronic and structural changes in electrode and electrolyte species through operando experiments, serving as a powerful tool for the development of beyond lithium-ion batteries.
ENERGY & ENVIRONMENTAL MATERIALS
(2021)
Article
Chemistry, Physical
Xiaojie Yin, Youmiao Li, Weishuo Cai, Cheng Fan, Wanqiu Liu, Nannan Wang, Guoxu Qin, Zhong Xie, Xiudong Chen, Yang Han
Summary: To meet increasing energy demands, new materials must be developed for high-performance rechargeable batteries. A novel Cu-based conductive metal organic framework composite (Cu-HHTP/G) was successfully synthesized by adding graphene (G) during the synthesis process. The introduction of graphene reduced stacking and facilitated charge transfer, resulting in better electrochemical performances. The Cu-HHTP/G composite exhibited promising anode properties for next-generation lithium-ion and potassium-ion batteries.
APPLIED SURFACE SCIENCE
(2023)
Review
Chemistry, Physical
Feifei Li, Yangyang Cao, Wenjing Wu, Gongwei Wang, Deyang Qu
Summary: This review summarizes the emerging anode and cathode prelithiation techniques in the advanced lithium-ion batteries field, along with strategies for manufacturing-compatible and scalable prelithiation. Prelithiation is crucial for compensating the initial capacity loss, enhancing full cell cycling performance, and propelling the commercialization of advanced LIBs/LICs.
Article
Chemistry, Physical
Qiuyan Li, Ran Yi, Yaobin Xu, Xia Cao, Chongmin Wang, Wu Xu, Ji-Guang Zhang
Summary: This study focuses on the design and failure analysis of a silicon (Si) anode for lithium-ion batteries (LIBs). The volumetric energy density of the Si anode depends heavily on factors such as Si/C loading, anode calendering density, first-cycle coulombic efficiency, and anode capacity density. Stable Si/C electrode structure is crucial for long-term cycling, and the degree of prelithiation needs to be balanced with cycle life.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Multidisciplinary
Fan Lin, Wenda Hu, Nicholas R. Jaegers, Feng Gao, Jian Zhi Hu, Huamin Wang, Yong Wang
Summary: The effects of water on the carboxylic acid ketonization reaction over solid Lewis-acid catalysts were investigated using various analytical techniques. The presence of water vapor in the feed gas was found to decrease the reaction rate by increasing the activation barrier of acetic acid adsorption on anatase TiO2 catalyst. Water was found to associate with the adsorbed intermediates on the catalyst surface and alter their reactivity for the ketonization reaction. The presence of water vapor also affected the species present on the catalyst surface and led to lower ketonization activity.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Martin Werres, Yaobin Xu, Hao Jia, Chongmin Wang, Wu Xu, Arnulf Latz, Birger Horstmann
Summary: Lithium metal batteries suffer from low cycle life due to the formation of isolated lithium during stripping. The interaction between lithium and solid-electrolyte interphase (SEI) leads to preferred stripping and isolated lithium formation. Cryogenic transmission electron microscopy (cryo TEM) observations confirm that isolated lithium occurs less at higher stripping current densities. To mitigate isolated lithium, a uniform lithium morphology during plating and a homogeneous SEI are indispensable.
Article
Chemistry, Multidisciplinary
Hao Jia, Ju-Myung Kim, Peiyuan Gao, Yaobin Xu, Mark H. Engelhard, Bethany E. Matthews, Chongmin Wang, Wu Xu
Summary: This study systematically investigates and compares localized high-concentration electrolytes (LHCEs) based on five different solvents in lithium-ion batteries (LIBs). The unique solvation structure of LHCEs facilitates the formation of solid electrolyte interphase (SEI) on graphite anode, enabling previously incompatible solvents to achieve reversible lithiation/delithiation. The study also reveals that the long-term cyclability of LIBs can be improved by introducing additives into LHCEs, which results in effective SEIs and cathode electrolyte interphases (CEIs).
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Multidisciplinary Sciences
Wei Zhang, Sungmin Kim, Lennart Wahl, Rachit Khare, Lillian Hale, Jianzhi Hu, Donald M. Camaioni, Oliver Y. Gutierrez, Yue Liu, Johannes A. Lercher
Summary: We propose a unique approach to selectively upcycle polyolefin waste by utilizing a highly ionic reaction environment, which increases polymer reactivity and reduces energy required for breaking carbon-carbon bonds. By catalyzing endothermic cleavage and exothermic alkylation reactions, we are able to convert polyethylene and polypropylene to liquid isoalkanes at temperatures below 100 degrees C. This process offers a high yield conversion of unprocessed postconsumer items into high-quality liquid alkanes.
Article
Chemistry, Physical
Isik Su Buyuker, Ben Pei, Hui Zhou, Xia Cao, Zhiao Yu, Sufu Liu, Weiran Zhang, Wu Xu, Ji-Guang Zhang, Zhenan Bao, Yi Cui, Chunsheng Wang, M. Stanley Whittingham
Summary: This study evaluates the electrochemical performance and thermal stability of several advanced electrolytes (mainly ether-based) in high-energy-density lithium-metal batteries. The results show that most ether-based electrolytes have better thermal resilience than carbonate electrolytes. However, extreme voltages can severely destabilize the ether-based electrolytes. Phosphate-based high-concentration electrolytes exhibit improved stability over carbonate electrolytes, even at elevated temperatures. These findings provide valuable guidance for the safety of future electrolyte designs.
ACS ENERGY LETTERS
(2023)
Article
Multidisciplinary Sciences
Guangxia Feng, Yaping Shi, Hao Jia, Samprash Risal, Xu Yang, Paul Ruchhoeft, Wei-Chuan Shih, Zheng Fan, Wu Xu, Xiaonan Shan
Summary: Understanding the nucleation and growth of lithium (Li) is crucial for designing high-performance battery electrodes. However, limited research has been done on the Li nucleation process due to a lack of imaging tools that can provide information on the entire dynamic process. We developed and utilized an operando reflection interference microscope (RIM) to achieve real-time imaging and tracking of Li nucleation dynamics at the individual nanoparticle level. This dynamic and operando imaging platform gives us the essential capabilities to continuously monitor and study the Li nucleation process. Our findings reveal that the formation of initial Li nuclei does not occur at the exact same time, and the Li nucleation process exhibits properties of both progressive and instantaneous nucleation. Furthermore, the RIM allows us to track the growth of individual Li nuclei and extract spatially resolved overpotential maps, which indicate that localized electrochemical environments significantly influence Li nucleation.
Article
Nanoscience & Nanotechnology
Zhun Dong, Wenda Hu, Hongjun Liu, Zhenzhen Yang, Debabrata Moitra, De-en Jiang, Sheng Dai, Jian Zhi Hu, Di Wu, Hongfei Lin
Summary: It is found that treating UiO-66 with methanol solvent and thermal activation can significantly enhance its CO2 adsorption capacity. Methanol treatment effectively removes residual impurities in the micropores of UiO-66 and improves its surface area, pore volume, and void fraction, leading to a close-to-ideal CO2 adsorption capacity.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Heonjae Jeong, Dan-Thien Nguyen, Yingjie Yang, D. Bruce Buchholz, Guennadi Evmenenko, Jinghua Guo, Feipeng Yang, Paul C. Redfern, Jian Zhi Hu, Karl T. Mueller, Robert Klie, Vijayakumar Murugesan, Justin Connell, Venkateshkumar Prabhakaran, Lei Cheng
Summary: In this study, the molecular interaction and chemical reactivity of electrolyte ions and solvent molecules on electrodes in multivalent magnesium batteries were investigated. The results provide insights into the mechanisms of electrolyte decomposition and suggest the importance of designing anodically stable electrolytes.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Ying Chen, Jaegeon Ryu, J. David Bazak, Dan Thien Nguyen, Kee Sung Han, Zheng Li, Jian Zhi Hu, Karl T. Mueller, Vijayakumar Murugesan
Summary: Liquid-liquid phase separation of MgTFSI2 or ZnTFSI2 electrolytes in mixed organic solvents is investigated in this study. The conditions for the formation of this phase separation are identified as high charge density in cations, low charge density in anions, strongly coordinating solvents, and weak coordinating solvents. The driving force for the phase separation is the preferred interaction between cations and strongly coordinating solvents. This research also reveals the presence of contact ion pairs and large ion aggregates in the dilute upper layer.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Cuixia Cheng, Yadong Zhou, Yaobin Xu, Hao Jia, Jumyeong Kim, Wu Xu, Chongmin Wang, Peiyuan Gao, Zihua Zhu
Summary: We have used experimental and computational methods to study the molecular process of solid-electrolyte interphase (SEI) layer formation under practical conditions. Our findings suggest that the solvation shell structure in the electrolyte has an impact on the mechanism and thickness of the SEI layer.
Article
Multidisciplinary Sciences
Jianghao Zhang, Wenda Hu, Binbin Qian, Houqian Li, Berlin Sudduth, Mark Engelhard, Lian Zhang, Jianzhi Hu, Junming Sun, Changbin Zhang, Hong He, Yong Wang
Summary: In this study, the authors demonstrate that coordinating Pd with alkenyl-type ligands creates an electron-rich environment for selective hydrogenation. The method of forming homogeneous-like Pd catalyst structure with noble metals is crucial for inhibiting side reactions in hydrotreating processes.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Hyung-Seok Lim, Won-Jin Kwak, Dan Thien Nguyen, Wei Wang, Wu Xu, Ji-Guang Zhang
Summary: Metal-oxygen batteries (MOBs) are promising for energy storage due to safety, low cost, and high energy density. However, the accumulation of discharge products during the oxygen reduction process can hinder the flow of active species, leading to increased impedance and shortened cycle life. A 3D-SOM structure of ruthenium/single-walled carbon nanotubes air electrode is shown to mitigate these effects and enhance the performance of MOBs.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Review
Chemistry, Multidisciplinary
Hao Jia, Wu Xu
Summary: In order to achieve higher energy density in lithium-ion batteries, there is great interest in developing high-voltage LIBs (>4.3 V) in both industry and academia. However, increasing the charge cutoff voltage of commercial LIBs can lead to severe degradation of both positive electrode materials and LiPF6-organocarbonate electrolytes. This paper analyzes the aging mechanisms associated with high-voltage LIBs and discusses countermeasures from electrolyte design.
TRENDS IN CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Jian Zhi Hu, Nicholas R. Jaegers, Nathan T. Hahn, Wenda Hu, Kee Sung Han, Ying Chen, Jesse A. Sears, Vijayakumar Murugesan, Kevin R. Zavadil, Karl T. Mueller
Summary: Efforts to expand the technological capability of batteries have generated increased interest in divalent cationic systems. Electrolytes used for these electrochemical applications often incorporate cyclic ethers as electrolyte solvents; however, the detailed solvation environments within such systems are not well-understood. NMR combined with quantum chemistry modeling is used to investigate the solvation structures of Ca(TFSI)2 and Zn(TFSI)2 in THF and 2-methyl-tetrahydrofuran. The results show the presence of multiple solvation structures in these electrolytes, with Zn(TFSI)2/THF exhibiting the lowest solubility, and cation size and solvent effects playing important roles in the solvation structures.
Article
Chemistry, Physical
Tianyu Chen, Zhibin Lu, Guangjin Zeng, Yongmin Xie, Jie Xiao, Zhifeng Xu
Summary: The study introduces a high-performance LSGM electrolyte-supported tubular DC-SOFC stack for portable applications, which shows great potential in developing into high-performing, efficient, and environmentally friendly portable power sources for distributed applications.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Wenbin Tong, Yili Chen, Shijie Gong, Shaokun Zhu, Jie Tian, Jiaqian Qin, Wenyong Chen, Shuanghong Chen
Summary: In this study, a three-dimensional porous NiO interface layer with enhanced anode dynamics is fabricated, forming a Schottky contact with the zinc substrate, allowing rapid and uniform zinc plating both inside and below the interface layer. The resulting NiO@Zn exhibits exceptional stability and high capacity retention.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yafeng Bai, Kaidi Li, Liying Wang, Yang Gao, Xuesong Li, Xijia Yang, Wei Lu
Summary: In this study, a flexible zinc ion supercapacitor with gel electrolytes, porous alpha-MnO2@reduced graphene oxide cathode, and activated carbon/carbon cloth anode was developed. The device exhibits excellent electrochemical performance and stability, even at low temperatures, with a high cycle retention rate after 5000 cycles.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Anmol Jnawali, Matt D. R. Kok, Francesco Iacoviello, Daniel J. L. Brett, Paul R. Shearing
Summary: This article presents the results of a systematic study on the electrochemical performance and mechanical changes in two types of commercial batteries with different anode chemistry. The study reveals that the swelling of anode layers in batteries with silicon-based components causes deformations in the jelly roll structure, but the presence of a small percentage of silicon does not significantly impact the cycling performance of the cells within the relevant state-of-health range for electric vehicles (EVs). The research suggests that there is room for improving the cell capacities by increasing the silicon loading in composite anodes to meet the increasing demands on EVs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yohandys A. Zulueta, My Phuong Pham-Ho, Minh Tho Nguyen
Summary: Advanced atomistic simulations were used to study ion transport in the Na- and K-doped lithium disilicate Li2Si2O5. The results showed that Na and K doping significantly enhanced Li ion diffusion and conduction in the material.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Zongying Han, Hui Dong, Yanru Yang, Hao Yu, Zhibin Yang
Summary: An efficient phase inversion-impregnation approach is developed to fabricate BaO-decorated Ni8 mol% YSZ anode-supported tubular solid oxide fuel cells (SOFCs) with anti-coking properties. BaO nanoislands are successfully introduced inside the Ni-YSZ anode, leading to higher peak power densities and improved stability in methane fuel. Density functional theory calculations suggest that the loading of BaO nanoislands facilitates carbon elimination by capturing and dissociating H2O molecules to generate OH.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Suresh Mamidi, Dan Na, Baeksang Yoon, Henu Sharma, Anil D. Pathak, Kisor Kumar Sahu, Dae Young Lee, Cheul-Ro Lee, Inseok Seo
Summary: Li-CO2 batteries, which utilize CO2 and have a high energy density, are hindered in practical applications due to slow kinetics and safety hazards. This study introduces a stable and highly conductive ceramic-based solid electrolyte and a metal-organic framework catalyst to improve the safety and performance of Li-CO2 batteries. The optimized Li-CO2 cell shows outstanding specific capacity and cycle life, and the post-cycling analysis reveals the degradation mechanism of the electrodes. First-principles calculations based on density functional theory are also performed to understand the interactions between the catalyst and the host electrode. This research demonstrates the potential of MOF cathode catalyst for stable operation in Li-CO2 batteries.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Ganghua Xiang, Zhihuan Qiu, Huilong Fei, Zhigang Liu, Shuangfeng Yin, Yuen Wu
Summary: In this study, a CeFeOx-supported Pt single atoms and subnanometric clusters catalyst was developed, which exhibits enhanced catalytic activity and stability for the preferential oxidation of CO in H2-rich stream through synergistic effect.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Dimitrios Chatzogiannakis, Marcus Fehse, Maria Angeles Cabanero, Natalia Romano, Ashley Black, Damien Saurel, M. Rosa Palacin, Montse Casas-Cabanas
Summary: By coupling electrochemical testing to operando synchrotron based X-ray absorption and powder diffraction experiments, blended positive electrodes consisting of LiMn2O4 spinel (LMO) and layered LiNi0.5Mn0.3Co0.2O2 (NMC) were studied to understand their redox mechanism. It was found that blending NMC with LMO can enhance energy density at high rates, with the blend containing 25% LMO showing the best performance. Testing with a special electrochemical setup revealed that the effective current load on each blend component can vary significantly from the nominal rate and also changes with SoC. Operando studies allowed monitoring of the oxidation state evolution and changes in crystal structure, in line with the expected behavior of individual components considering their electrochemical current loads.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Chiara Cementon, Daniel Dewar, Thrinathreddy Ramireddy, Michael Brennan, Alexey M. Glushenkov
Summary: This Perspective discusses the specific power and power density of lithium-ion capacitors, highlighting the fact that their power characteristics are often underestimated. Through analysis, it is found that lithium-ion capacitors can usually achieve power densities superior to electrochemical supercapacitors, making them excellent alternatives to supercapacitors.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Weihao Wang, Hao Yu, Li Ma, Youquan Zhang, Yuejiao Chen, Libao Chen, Guichao Kuang, Liangjun Zhou, Weifeng Wei
Summary: This study achieved an improved electrolyte with excellent low-temperature and high-voltage performance by regulating the Li+ solvation structure and highly concentrating it. The electrolyte exhibited outstanding oxidation potential and high ionic conductivity under low temperature and high voltage conditions, providing a promising approach for the practical application of high-voltage LIBs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Martin Bures, Dan Gotz, Jiri Charvat, Milos Svoboda, Jaromir Pocedic, Juraj Kosek, Alexandr Zubov, Petr Mazur
Summary: Vanadium redox flow battery is a promising energy storage solution with long-term durability, non-flammability, and high overall efficiency. Researchers have developed a mathematical model to simulate the charge-discharge cycling of the battery, and found that hydraulic connection of electrolyte tanks is the most effective strategy to reduce capacity losses, achieving a 69% reduction.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
M. Rodriguez-Gomez, J. Campo, A. Orera, F. de La Fuente, J. Valenciano, H. Fricke, D. S. Hussey, Y. Chen, D. Yu, K. An, A. Larrea
Summary: In this study, we analysed the operando performance of industrial lead cells using neutron diffraction experiments. The experiments revealed the evolution of different phases in the positive electrode, showed significant inhomogeneity of phase distribution inside the electrode, and estimated the energy efficiency of the cells.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Jiawei Liu, Chenpeng Wang, Yue Yao, Hao Ye, Yinglong Liu, Yingli Liu, Xiaoru Xu, Zhicong Chen, Huazheng Yang, Gang Wu, Libin Lei, Chao Wang, Bo Liang
Summary: The study focuses on utilizing double conductive Ni-pads as anode collectors in micro-tubular solid oxide fuel cells. The simulation results show excellent performance and stability of DCNPs, and also highlight the potential applications in various fields.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yang Wang, Kangjie Zhou, Lang Cui, Jiabing Mei, Shengnan Li, Le Li, Wei Fan, Longsheng Zhang, Tianxi Liu
Summary: This study presents a polyimide sandwiched separator (s-PIF) for improving the cycling stability of Li-metal batteries. The s-PIF separator exhibits superior mechanical property, electrolyte adsorption/retention and ion conductivity, and enables dendrite-free Li plating/stripping process.
JOURNAL OF POWER SOURCES
(2024)
