Article
Chemistry, Physical
Zhenghua Zhang, Jiugang Hu, Yang Hu, Hongmei Wang, Huiping Hu
Summary: This work investigates the effect of an advanced electrolyte additive on the performance of Ni-rich LiNixCoyMn1-x-yO2/graphite batteries. The results show that the additive induces the formation of robust electrolyte/electrode interphase, significantly improving the cycling performance and reducing the cell impedance. The capacity retention rate of the cells with the additive-based electrolyte can reach 90% after 600 cycles, which is considerably better than that of baseline batteries (70%). Mechanistic studies reveal that the additive suppresses the formation of fragile Li2CO3 and promotes the formation of more stable LiF, LixPOyFz, and additional organic phosphorus species on the electrode surface, thereby preventing cation disorder and irreversible phase transitions.
APPLIED SURFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Da-Ae Lim, Young-Kyeong Shin, Jin-Hong Seok, Dayoung Hong, Kyoung Ho Ahn, Chul Haeng Lee, Dong-Won Kim
Summary: In this study, a TMAEPPi additive was synthesized to enhance the cycling characteristics and thermal stability of high-capacity NCM cathode materials. TMAEPPi formed a stable CEI layer, suppressing electrolyte decomposition and reducing material microcracking, which improved the performance of lithium-ion batteries.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Yongkang Han, Yingchuan Zhang, Yike Lei, Dongdong Xiao, Jie Ni, Weiguang Lin, Pingwen Ming, Cunman Zhang, Qiangfeng Xiao
Summary: To address the issues of Ni-rich NCM, Al (CF3SO3)(3) was proposed as a solid electrolyte additive to regulate the CEI in single-crystalline NCM811. The facile oxidation of CF3SO3- and subsequent reactions with reactive species from NCM811 and electrolyte lead to the formation of a robust sandwich CEI film containing sulfur and aluminum species. This CEI film not only prevents electrolyte decomposition but also alleviates the formation of inactive rock-salt phase on NCM811 surface, resulting in a high-capacity retention of 91.5% after 200 cycles under 0.5 C.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Yanxia Che, Guanjie Li, Caixing Li, Yating Xiezhang, Wenguang Zhang, Lidan Xing, Weishan Li
Summary: The instability of the electrode/electrolyte interface is currently hindering the application of high-voltage cathodes. Electrolyte oxidation and product accumulation cause an increase in electrode polarization, leading to degradation in cycle life, rate capability, and low-temperature performance. This study proposed the use of a novel electrolyte film-forming additive, lithium tetraborate (Li2TB), to create a stable and low-impedance interphase on the Ni-rich cathode surface. The LiNi0.6Co0.2Mn0.2O2 (NCM622)/Li half-cell with 2 wt% Li2TB showed an increased capacity retention from 50% to 76% after 300 cycles. At low temperatures, the capacity retention with Li2TB was 99%, compared to 47% without the additive. The effectiveness of Li2TB in enhancing interphasial stability was further confirmed in a 2 Ah-grade NCM622/graphite pouch cell. The mechanism of the additive was proposed based on theoretical calculations and experimental results.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Jing Zhang, Jiapei Li, Longhao Cao, Wenhua Cheng, Ziyin Guo, Xiuxia Zuo, Chao Wang, Ya-Jun Cheng, Yonggao Xia, Yudai Huang
Summary: In this study, a new approach called surface targeted precise functionalization (STPF) is proposed to enhance the structural stability and electrochemical performance of NCM811 cathode material. The approach involves coating the NCM811 particle surface with 3-aminopropyl dimethoxy methyl silane (3-ADMS) and precise deposition of ascorbic acid via an acid-base interaction. This method leads to the formation of an ultra-thin spinel surface layer and a stable cathode-electrolyte interface, improving the electrochemical kinetics and inhibiting crack propagation. This research provides a feasible route to enhance the practical applications of high-energy density lithium-ion battery technology.
Article
Nanoscience & Nanotechnology
Xiaotang Shi, Tianle Zheng, Jianwei Xiong, Bingying Zhu, Ya-Jun Cheng, Yonggao Xia
Summary: A new synergistic positive and passive approach is proposed to construct a stable electrode-electrolyte interface at high voltage in lithium-ion batteries, resulting in significantly improved cyclic stability and capacity retention by adding small amounts of Li2S and AN. This study provides new principles guiding high-voltage lithium-ion batteries with excellent electrochemical performance.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Subin Lee, Taeeun Yim
Summary: This study investigates the use of fluorophenyl methyl sulfone as a surface modifier to improve the cycling performance of nickel-rich lithium layered oxides at high temperatures. The results show that the cell cycled with fluorophenyl methyl sulfone exhibits better cycling retention and suppresses the parasitic reactions associated with electrolyte decomposition by forming stable cathode-electrolyte interphases.
JOURNAL OF POWER SOURCES
(2022)
Article
Nanoscience & Nanotechnology
Chaeeun Song, Hyeongyu Moon, Kyungeun Baek, Chorong Shin, Kwansoo Lee, Seok Ju Kang, Nam-Soon Choi
Summary: Nickel-rich layered oxides have high potential as cathode materials for high-energy Li-ion batteries, but practical applications are hindered by issues such as metal dissolution and reactive compound formation. This study demonstrates that the supplementation of electrolyte with tert-butyldimethylsilyl glycidyl ether (tBS-GE) can inhibit the interfacial degradation of LiNi0.9CoxMnyAlzO2 (NCMA) cathode and graphite (Gr) anode caused by HF. The tBS-GE scavenges HF and stabilizes the electrode surfaces, while its reaction with CO2 suppresses battery swelling. Adding 0.1 wt% tBS-GE to the electrolyte leads to improved capacity retention and discharge capacity of the NCMA/Gr full cells.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Jinhyeok Ahn, Jinsol Im, Hyewon Seo, Sukeun Yoon, Kuk Young Cho
Summary: This study proposes the use of 2,4-difluorobiphenyl (FBP) as a fluorine-based cathode electrolyte interphase (CEI)-forming additive for Ni-rich LiNi0.83Co0.11Mn0.06O2 (NCM83), which enhances cycling stability at high cut-off voltages and promotes the formation of a stable CEI layer on the surface. The results demonstrate the potential of introducing a fluorine component to existing additives for the development of new functional additives in lithium-ion battery applications.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Shengxian She, Yangfan Zhou, Zijian Hong, Yuhui Huang, Yongjun Wu
Summary: It has been found that adding fluorinated electrolyte additives such as fluoroethylene carbonate (FEC) can stabilize the LiF-based solid electrolyte interphases on lithium metal anodes and improve cycle performance. However, the impact of FEC additives on the cathode side, particularly for nickel-rich LiNi(1-x-y )Co( x )Mn( y )O(2) (NCM) ternary cathodes, remains unclear. This study investigates the effect of FEC additives on the LiNi0.9Co0.05Mn0.05O2 (NCM90) cathode and discovers that FEC can produce a LiF-based cathode-electrolyte interphase (CEI), improving cycle performance at low cut-off voltage while deteriorating battery performance at high cut-off voltage. Additionally, the unstable Li(2)CO(3)-based CEI components on the NCM90 surface contribute to poor long-term performance.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Yunjing Cao, Nan Li, Na Li, Wujiu Zhang, Shiyu Liang, Zhidong Hou, Da Lei, Ting Jin, Jian-Gan Wang, Keyu Xie, Chao Shen
Summary: This study systematically reveals the mechanism of electrolyte additive in enhancing the electrochemical performance of Ni-rich layered oxides at high voltage and high temperature. The additive improves the stability of the electrode by strengthening the cathode-electrolyte interface and deactivating reactive oxygen species, enabling the Ni-rich cathode to adapt to deep charging state and highly oxidized environment. The results provide a guide for designing electrolytes for high-voltage and high-temperature Ni-rich LIBs.
ENERGY STORAGE MATERIALS
(2023)
Review
Chemistry, Physical
Zhaoyu Sun, Jingwei Zhao, Min Zhu, Jun Liu
Summary: This article summarizes the three interactional issues of high-voltage lithium-ion batteries in commercial electrolytes and proposes solutions and a framework for future research.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Fanglin Wu, Angelo Mullaliu, Thomas Diemant, Dominik Stepien, Tatjana N. Parac-Vogt, Jae-Kwang Kim, Dominic Bresser, Guk-Tae Kim, Stefano Passerini
Summary: High-voltage nickel-rich layered cathodes have excellent discharge capacity and high energy density but are structurally and interfacially unstable at high voltages (>4.3 V). By using lithium borate salts as electrolyte additives, an enhanced cathode-electrolyte interphase is generated to improve the stability. Specifically, the use of lithium bis(oxalato)borate (LiBOB) leads to enhanced cycling stability and almost no voltage hysteresis after 200 cycles at 1C.
Article
Nanoscience & Nanotechnology
Sewon Park, Gayoung Choi, Hyeong Yong Lim, Kyung Moon Jung, Sang Kyu Kwak, Nam-Soon Choi
Summary: In this study, a multifunctional electrolyte additive called BTSPFA was developed to enhance the interfacial stability of graphite anodes and Ni-rich cathodes in Li-ion cells. BTSPFA eliminates corrosive HF molecules, promotes the formation of a polar CEI on the Ni-rich cathode, and suppresses the reduction of the electrolyte. The synergistic effect of BTSPFA effectively prevents TM leaching from the cathode and unwanted TM deposition on the anode. LiNi0.8Co0.1Mn0.1O2/graphite full cells with 1 wt % BTSPFA showed enhanced discharge capacity retention of 79.8% after 500 cycles at 1C and 45°C.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Ryan Brow, Anthony Donakowski, Alex Mesnier, Drew J. Pereira, K. Xerxes Steirer, Shriram Santhanagopalan, Arumugam Manthiram
Summary: Nickel-rich cathode materials, despite being a promising choice for electric vehicles, face challenges related to long-term cycle life retention and air stability. This study investigates the use of surface treatments, specifically the coating of LiNi0.9Mn0.05Al0.05O2 cathode materials with lithium phosphate, to improve their performance. The results show that low concentration phosphoric acid coating leads to delayed voltage decay and enhanced discharge capacity during high-voltage cycling.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xianli Song, Chenlu Wang, Junwu Chen, Sen Xin, Du Yuan, Yanlei Wang, Kun Dong, Lipeng Yang, Gongying Wang, Haitao Zhang, Suojiang Zhang
Summary: This study presents a new design of solid Ionogel-in-Ceramic electrolyte for rechargeable Li-metal batteries, demonstrating excellent ionic conductivity and long cycling stability. The molecular dynamics simulations reveal the important roles of salt concentrations and co-coordination in the PolyIL-in-Salt ionogel. The designed structure effectively inhibits parasitic reactions and provides efficient Li+ conducting pathways, leading to promising performance in all-solid-state lithium metal batteries.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xuanbo Chen, Nailiang Yang, Yanlei Wang, Hongyan He, Jiangyan Wang, Jiawei Wan, Hongyu Jiang, Bo Xu, Liming Wang, Ranbo Yu, Lianming Tong, Lin Gu, Qihua Xiong, Chunying Chen, Suojiang Zhang, Dan Wang
Summary: Solar evaporation using ultrastable amorphous Ta2O5/C nanocomposite with a hollow multishelled structure allows for highly efficient water purification, achieving WHO standard drinkable water from various sources and reducing pseudovirus SC2-P concentration significantly.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Shuang Zheng, Jiayue Tang, Dong Lv, Mi Wang, Xuan Yang, Changshun Hou, Bo Yi, Gang Lu, Ruiran Hao, Mingzhan Wang, Yanlei Wang, Hongyan He, Xi Yao
Summary: This study proposes a method of humidity-based power generation by integrating intrinsic gradient within a humidity field with liquid-infused nanofluidics. By exposing capillary-stabilized ionic liquid film to the humidity field, a sustained transmembrane water-content difference is created, enabling asymmetric ion-diffusion across nanoconfined fluidics for long-term electricity generation. The high power density achieved is attributed to the nanoconfined ionic liquid that combines van der Waals and electrostatic interactions, allowing for directional diffusion of moisture-liberated ions.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Analytical
Hongwei Chu, Qun Zhao, Ju Liu, Kaiguang Yang, Yanlei Wang, Jianhui Liu, Kun Zhang, Baofeng Zhao, Hongyan He, Yong Zheng, Shijun Zhong, Zhen Liang, Lihua Zhang, Yukui Zhang
Summary: Efficient extraction of hydrophobic membrane protein complexes (MPCs) has always been a challenge due to stability concerns, but the novel i-TAN extraction system utilizing TEAA IL and NP-40 shows superior performance in stabilizing PPIs and extracting MPCs. This system allows for confident identification of protein interactions and provides insights into drug resistance mechanisms. The study presents a novel strategy for MPC extraction and downstream processing, highlighting the potential of i-TAN in interactomics and functional analysis of MPCs.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Xinliang Li, Yanlei Wang, Ze Chen, Pei Li, Guojin Liang, Zhaodong Huang, Qi Yang, Ao Chen, Huilin Cui, Binbin Dong, Hongyan He, Chunyi Zhi
Summary: This study presents a new iodide-ion conversion battery with high capacity, fast redox kinetics, and superior cycle stability. The battery exhibits a new two-electron redox chemistry and operates efficiently at low temperatures, achieving a high energy density.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Ke Yu, Wei-Lu Ding, Yumiao Lu, Yanlei Wang, Yanrong Liu, Guangyong Liu, Feng Huo, Hongyan He
Summary: In this study, COSMO-RS was used to screen 3886 ionic liquids (ILs) to find the most effective ones for lignin dissolution. Through simulations and experiments, significant improvement in lignin dissolution was achieved in [PMpyrr][OAc] IL. The study also revealed the underlying mechanism of hydrogen bonding between ILs and lignin, providing possible ways for the development of more selective and efficient lignin dissolution methods based on solvent properties.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Multidisciplinary
Ming Yi, Mi Wang, Yan Wang, Yanlei Wang, Jian Chang, Atefeh Khorsand Kheirabad, Hongyan He, Jiayin Yuan, Miao Zhang
Summary: The study successfully used poly(ionic liquid)s as hydrophilicity modifiers to construct MXene-based lamellar membranes with tunable hydrophilicity. By simple anion exchange, the membrane's permeance and rejection were significantly improved. This method opens up new avenues for building high-performance 2D material-based membranes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Wei-Lu Ding, Tao Zhang, Yanlei Wang, Jiayu Xin, Xiaoqing Yuan, Lin Ji, Hongyan He
Summary: This study successfully trained a model using machine learning technology to rapidly predict the cleavage activity of ionic liquids and screened out optimal candidates for future applications. This novel strategy can help reduce time consumption and improve the efficiency of targeted cleavage of lignin.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Multidisciplinary Sciences
Jiayue Tang, Yuanyuan Zhao, Mi Wang, Dianyu Wang, Xuan Yang, Ruiran Hao, Mingzhan Wang, Yanlei Wang, Hongyan He, John H. Xin, Shuang Zheng
Summary: This article investigates the significant impact of circadian humidity fluctuation on human life and demonstrates the potential of utilizing spherical cap-shaped ionic liquid drops on a nanowire array to generate continuous electricity. The researchers attribute this capability to the directional capillary flow induced by daily humidity fluctuation.
NATURE COMMUNICATIONS
(2022)
Article
Engineering, Environmental
Chenlu Wang, Yanlei Wang, Ju Liu, Mi Wang, Zhongdong Gan, Hongyan He
Summary: This study investigates the potential and mechanism of confined ionic liquids in graphene oxide for carbon dioxide separation through extensive molecular dynamics simulations. The results show that confined ionic liquids can enhance the solubility and selectivity of carbon dioxide, which is significant for theoretical understanding and practical applications.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Yulong Ling, Kun Li, Mi Wang, Junfeng Lu, Chenlu Wang, Yanlei Wang, Hongyan He
Summary: The deep learning force field (DPFF) can accurately describe the force and energy of ionic liquids, and reasonably predict the coupling nature between coulombic and hydrogen bonding interactions.
JOURNAL OF POWER SOURCES
(2023)
Article
Engineering, Chemical
Mi Wang, Yanlei Wang, Tao Zhang, Yu Xia, Hongyan He
Summary: In this study, the regulating mechanism of structural, thermodynamical, and diffusive properties of 18 imidazole ionic liquids (ILs) with different anions was investigated using molecular dynamics simulations and theoretical analysis. It was found that the radial distribution function and coordinate number of these ILs were similar, while the vibrational spectrum and diffusive property varied greatly with the anion structure, resulting in a significant change in the self-diffusive coefficient (SDC). Moreover, the SDC was found to have an exponential relationship with free energy and entropy, suggesting that these can be key indicators in designing high-performance ILs for practical chemical engineering applications.
Article
Engineering, Chemical
Jingyu Qin, Yanlei Wang, Feng Huo, Hongyan He
Summary: Understanding the interfacial structure and flow behavior of ionic liquids (ILs) confined in nano-channels is crucial for the design and application of IL-based chemical engineering devices. Molecular dynamics simulations reveal that the cations in crystalline silica (c-SiO2) exhibit a vertical conformation, while those in graphene-covered crystalline silica (g@c-SiO2) display a parallel conformation. The anions, on the other hand, are randomly distributed. The different cation conformations result in distinct ion diffusion and flow patterns, with the parallel conformation facilitating nanoflow in the g@c-SiO2 channels. These findings provide valuable insights into the molecular mechanism of nanoflow and inform the rational design of IL-based devices and chemical engineering processes.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Physical
Kun Wang, Lekai Xu, Jiao Wang, Shaojun Zhang, Yanlei Wang, Nailiang Yang, Jiang Du, Dan Wang
Summary: Safe, green, and efficient industrial production has always been the goal of the chemical industry. A smart heat isolation material has been developed by coupling multishelled hollow structures with temperature-sensitive polymers. This material exhibits good heat insulation at lower temperatures and increased thermal conductivity under overheating conditions.
GREEN ENERGY & ENVIRONMENT
(2023)
Article
Chemistry, Multidisciplinary
Yanlei Wang, Hongyan He, Chenlu Wang, Yumiao Lu, Kun Dong, Feng Huo, Suojiang Zhang
Summary: Ionic liquids (ILs) are promising for green chemistry, environmental science, and sustainable technology due to their unique properties. Research is focused on understanding ILs and developing applications, but challenges remain in areas such as observing and simulating their interactions.
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)
