Article
Chemistry, Physical
Alexey A. Mikhaylov, Alexander G. Medvedev, Ivan A. Buldashov, Timur M. Fazliev, Elena A. Mel'nik, Tatiana A. Tripol'skaya, Sergey Sladkevich, Vitaly A. Nikolaev, Ovadia Lev, Petr Prikhodchenko
Summary: This article describes a green chemistry synthesis method for a sodium-ion battery, in which a nanometric Sphalerite film is uniformly coated on reduced graphene oxide as the anode. The synthesis uses low-cost, abundant raw materials and a process with low energy consumption and minimal waste generation. The resulting anode shows excellent electrochemical characteristics and high energy efficiency.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Lu Yao, Yuebin Xi, Huijuan Han, Weiwei Li, Cunjing Wang, Yong Feng
Summary: This study prepared new LiMn2O4 directly from the leaching solution of waste lithium-ion batteries, avoiding complex separation processes, and confirmed the feasibility of recycling waste lithium-ion batteries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Weiqin Li, Huinan Guo, Kai Chen, Zhaoxia Yuan, Yafei Liu, Mengyuan Yue, Yusang Guo, Yijing Wang
Summary: In this work, Na2C7NO4H3 (Na(2)PDA)/reduced graphene oxide (rGO) nanocomposites are prepared via a simple low cost method to address the issues of low conductivity and high solubility in organic electrolyte for sodium ion batteries (SIBs). The addition of rGO enhances electroconductivity, while the formation of sodium salt improves the problem of high solubility in organic electrolyte. The reasonable designs of sodium salt and construction of micro-nano structure endow it remarkable electrochemical peculiarities.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Lixuan Zhang, Fan Peng, Man Zhang, Dan Li, Qichang Pan, Guanhua Yang, Fenghua Zheng, Youguo Huang, Hongqiang Wang, Qingyu Li
Summary: In this study, a heterostructured binary sulfide nanoparticles coated with N-doped carbon and further wrapped with graphene was synthesized to overcome the volume variation and inferior electrical conductivity of SnS2, making it a promising anode material for both lithium-ion batteries and sodium-ion batteries.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Lupeng Zhang, Xinle Li, Mingrui Yang, Weihua Chen
Summary: This review highlights the importance of safety in lithium-ion and sodium-ion batteries, with a focus on the development of high-safety separators. It summarizes the key considerations for these separators and outlines the challenges and perspectives in their development direction.
ENERGY STORAGE MATERIALS
(2021)
Article
Engineering, Environmental
Xiang Bai, Caixia Zhu, Yierxiati Dilixiati, Xing Fan, Xing-Lei Wang, Miao Du, Zhi-Xiong Huang, Xiao-Yan He, Xing-Long Wu
Summary: In this study, LiCrTiO4 nanoparticles with/without carbon layer were successfully prepared and used as cathodes for hybrid magnesium-lithium ion batteries. The nanoparticles with carbon layer exhibited high reversible capacity, excellent rate performance, and ultra-stable cycling stability. The improved electrochemical performance was attributed to the enhanced conductivity and ion diffusion rate, as well as the decreased polarization value induced by the carbon coating layer with a higher surface area. This study demonstrates a promising application of LCTOC in the fabrication of advanced HMLBs.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Jiayi He, Shuxin Zhuang, Zhiheng Wang, Gaoxing Sun, Xiaoxiao Pan, Yuqing Sun, Mi Lu, Feiyue Tu
Summary: A monocrystalline LiMn2O4 with a regular truncated octahedral structure was successfully synthesized using a facile and low-cost carbon template sol-gel method. By adjusting the carbon template content, the phase composition and morphology of LiMn2O4 can be controlled, leading to a nanoporous network structure composed of truncated nano-octahedrons with high crystallinity. The high crystallinity suppresses Jahn-Teller distortion and the {111} surfaces inhibit Mn dissolution, improving the cycle stability, while the nanoporous network structure facilitates Li+ diffusion and the {100} and {110} surfaces promote Li+ diffusion, increasing the discharge capacity and rate capability. The obtained LMO-0.5 sample exhibits remarkable discharge specific capacity (135.8 mA h/g at 0.1 C), excellent rate capability (91.2 mA h/g even at 20 C), and prominent cycle stability (a capacity retention of 91.7% after 2000 cycles at 20 C), making it an ideal cathode material for developing long-lifespan lithium-ion batteries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Yajuan Zhang, Xiaoyan Yuan, Ting Lu, Zhiwei Gong, Likun Pan, Shouwu Guo
Summary: The V2O5 center dot nH(2)O/rGO composite material prepared via a dual electrostatic assembly method shows excellent cathode performance for lithium-ion batteries, with high reversible capacity and exceptional rate capability surpassing traditional V2O5/carbon composites. The synergy between one-dimensional V2O5 center dot nH(2)O nanobelts and two-dimensional rGO nanosheets provides a short transport pathway and enhanced electrical conductivity, offering a new opportunity for designing high-performance cathode materials for advanced LIBs.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Materials Science, Ceramics
Yulei Sui, Yueying Hao, Xiaoping Zhang, Jiangpeng Li, Gongyu Wen, Shengkui Zhong, Ziwei Zhang, Ling Wu
Summary: This study successfully synthesized V-substituted Na0.67Fe0.5Mn0.5O2 cathode material with improved electrochemical performance, and investigated the effects of V-substitution on its chemical composition, crystal structure and morphology, as well as the modification mechanisms on the enhanced electrochemical properties. The results showed that introducing V ions into the lattice of Na0.67Fe0.5Mn0.5O2 crystals significantly improved its rate capability and cycle stability, mainly due to the enhanced Na+ diffusion rate and structural reversibility.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Guoliang Bai, Wei Wei, Benqiu Wang, Chunhua Wang, Na Liu, Jihu Jiang, Pengpeng Li
Summary: Monoclinic Li1+xV3O8 cathode materials synthesized by sol-gel method exhibit good electrochemical properties, including high initial discharge/charge specific capacities and cycle performance under 50 mA g(-1) current, along with good rate performance.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Chemistry, Physical
Ruifeng Qian, Menglong Yao, Fengping Xiao, Tianhao Yao, Huiying Lu, Yan Liu, Jian-Wen Shi, Yonghong Cheng, Hongkang Wang
Summary: Mesoporous TNO was synthesized using a simple sol-gel method with PVP as a regulating agent, and the optimized TNO with PVP of 58000 showed significantly improved lithium storage performance. The fine mesoporous framework consisting of interconnected TNO nanocrystallites contributed to the superior lithium storage behavior and cycling stability of TNO.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
K. P. Lakshmi, R. Deivanayagam, M. M. Shaijumon
Summary: A composite of antimony oxide microstructures encapsulated in graphene aerogel, interconnected by a network of carbon nanotubes, shows excellent electrochemical performance as an anode for sodium and lithium ion batteries. The unique star-shaped Sb2O3 microstructures are synthesized through a facile hydrothermal method, exhibiting stable specific capacity over 100 cycles. The study investigates the reaction kinetics upon sodiation and attempts to probe the underlying electrochemical charge storage mechanism using ex-situ techniques.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Chemical
Yanan Zhu, Caiyuan Liu, Xin Fang, Hui Peng, Yonggang Yang, Yi Li
Summary: This work reported a new quasi-solid lithium-ion batteries technology, utilizing sol-gel transcription method to synthesize an organic-inorganic composite and prepare mesoporous SiO2 nanotubes and Si/SiC/C composite nanotubes as electrolyte and electrode materials. The quasi-solid lithium-ion battery exhibited a wide electrochemical window, high ionic conductivity, and good cycle stability.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Chemistry, Physical
E. Thauer, G. S. Zakharova, S. A. Wegener, Q. Zhu, R. Klingeler
Summary: Li3VO4/C composites synthesized with different organic additives can affect the morphology and crystallite size of the final product, thereby influencing their electrochemical performance as anode materials for LIBs. Using carboxylic acids as carbon source can result in composites with a high surface area and enhanced electrochemical activity, while materials synthesized with glucose show superior cycling stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Wan-Jing Yu, Wenjie He, Chaolei Wang, Fan Liu, Liu Zhu, Qinghua Tian, Hui Tong, Xueyi Guo
Summary: A hybrid material of titanium-oxide quantum dots anchored on graphene nanoribbons was prepared and evaluated as anodes for Li/Na-ion batteries. The material showed desirable charge capacities, stable cyclic ability, and excellent rate performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Xi Zhou, Peng Zeng, Hao Yu, Changmeng Guo, Changqing Miao, Xiaowei Guo, Manfang Chen, Xianyou Wang
Summary: The study introduced double transition metal oxide TiNb2O7 (TNO) nanoparticles on activated carbon cloth (ACC) to enhance the catalytic effect on sulfur conversion reaction. This novel flexible self-supporting structure not only improved the redox reaction kinetics of sulfur but also effectively inhibited the shuttle effect of lithium polysulfides (LiPSs), showing impressive electrochemical performance at high discharge rates.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Changfei Zou, Li Yang, Kaili Luo, Lei Liu, Xiyuan Tao, Lingguang Yi, Xianhu Liu, Zhigao Luo, Xianyou Wang
Summary: By utilizing composite polymer electrolytes as the interface, the interfacial impedance and rapid growth of lithium dendrites between sulfide solid electrolyte and lithium metal in solid-state lithium metal batteries can be effectively reduced, enhancing the stability of battery performance. This cell structure design based on interface modification provides good prospects for the commercial application of all-solid-state lithium metal batteries.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Shuang Cao, Jiarui Chen, Heng Li, Zhi Li, Changmeng Guo, Gairong Chen, Xiaowei Guo, Xianyou Wang
Summary: Li1.17Na0.02Mn0.54Ni0.13Co0.13O2 (PN-LMNCO) is prepared through surface phase structure controlling and ion doping to address the rapid capacity fading and voltage decay issues of Li-rich Mn-based cathode materials. The introduction of lithium deficiencies induces surface phase transformation and forms an in-situ spinel surface conversion film, effectively inhibiting structure degradation during charge/discharge. Additionally, sodium doping increases spacing between Li layers, improving the rate capacity. The PN-LMNCO exhibits high initial coulombic efficiency (91.2%), retains 94.7% discharge specific capacity after 200 cycles, and maintains good discharge capacity (214 mA h g(-1)) at a high current rate of 5 C. This work is important for the development of high-energy density lithium-ion batteries for electric vehicles.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Multidisciplinary
Wenlong Xia, Mingyu Han, Yufang Chen, Ying Zhou, Hongbo Shu, Yan Chen, Jincang Su, Xianyou Wang
Summary: To improve the electrochemical properties of lithium-sulfur batteries, this study proposes a rational strategy of tuning the d-band of catalysts through the introduction of Fe into in situ grown Ni2P on rGO, resulting in NiFeP/rGO composites. The incorporation of Fe improves the metallic conduction of Ni2P and elevates the d-band center of NiFeP, effectively facilitating charge transfer and weakening the S-S bonds of polysulfides. As a functional interlayer, NiFeP/rGO composites not only promote the interaction between polysulfides and NiFeP but also accelerate the conversion of polysulfides. The high-efficiency NiFeP/rGO electrocatalyst demonstrates the availability of the d-band regulating strategy for lithium-sulfur batteries, providing insights into the redox reaction of LiPSs at the molecular or atom level.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Engineering, Environmental
Hui Li, Jiao Peng, Zhenyu Wu, Xiaolin Liu, Peng Liu, Baobao Chang, Xianyou Wang
Summary: A hierarchical SiOx-based anode with double-layer coatings of Sn inner layer and N-doped carbon outer shell was designed to address the limitations of SiOx-based anode materials. The SiOx/C@Sn@NC anode exhibits enhanced initial Coulomb efficiency, higher reversible capacity, and superior long lifespan. The unique double-layer coating structure and multiple active components contribute to the improved electrochemical properties.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Heng Li, Shuang Cao, Zhi Li, Chao Wu, Jiarui Chen, Xiaowei Guo, Baobao Chang, Xianyou Wang
Summary: Oxygen-anion charge compensation enables lithium-rich manganese-based cathode materials to have higher specific capacity, but it also leads to irreversible oxygen redox and various problems. In this study, an interfacial engineering with sodium hypophosphite is used to modify the cathode material and improve its electrochemical performance. The modification strategy based on the formation of a Li3PO4 protective layer and the generation of oxygen vacancies effectively promotes the kinetic properties of the cathode material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Xiyuan Tao, Li Yang, Jiali Liu, Zihao Zang, Peng Zeng, Changfei Zou, Lingguang Yi, Xiaoyi Chen, Xiaolin Liu, Xianyou Wang
Summary: Garnet-type Li7La3Zr2O12 (LLZO) is a solid-state electrolyte with high Li+ conductivity and stability. Ga-LLZO, in particular, achieves high ionic conductivity and can be prepared using a rapid ultra-high-temperature sintering method. The Ga-LLZO ceramic electrolyte exhibits high relative density, good ionic conductivity, and excellent electrochemical stability and interfacial compatibility against Li metal.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Juan Yang, Jiao Peng, Yu Lei, Junqing Zeng, Guang Li, Yongqiang Shen, Baobao Chang, Liping Zheng, Xianyou Wang
Summary: A solvent-free mechanochemical method was used to prepare a calcium carbide-derived porous carbon (CCDPC) composite with polyaniline (PANI). The CCDPC/PANI composite showed a significantly improved specific capacitance and energy density compared to pure CCDPC, as well as good capacitance retention after cycling tests. This study provides important insights for enhancing the electrochemical performance of high-performance supercapacitors.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Changfei Zou, Zihao Zang, Xiyuan Tao, Lingguang Yi, Xiaoyi Chen, Xiaoyan Zhang, Li Yang, Xianhu Liu, Xianyou Wang
Summary: In this study, a thin layer of Li1.3Al0.3Ti1.7(PO4)(3) was used as an interface coating in lithium-ion batteries to improve the stability between the cathode and solid-state electrolyte. The nanoscale coating not only enhances lithium ion transport but also alleviates interfacial problems, leading to better capacity retention.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Jiarui Chen, Shuang Cao, Zhi Li, Heng Li, Changmeng Guo, Ruijuan Wang, Lei Wu, Yixu Zhang, Yansong Bai, Xianyou Wang
Summary: In this study, homogeneous Li2ZrO3 (LZO) was successfully coated on the surface of Li1.2Mn0.54Ni0.13Co0.13O2 (LRO) by molten salt-assisted sintering technology. The as-prepared LRO@LZO composites have improved cycling performance due to the good chemical and electrochemical stability of LZO. Additionally, Li2ZrO3 acts as an excellent lithium-ion conductor, leading to increased lithium-ion transfer rate and improved rate capacity of LRO. Therefore, this study provides a new solution to enhance the structure stability and electrochemical performance of lithium-rich manganese-based cathode materials.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Environmental
Xi Zhou, Xuelin Huang, Guang Li, Peng Zeng, Xiaolin Liu, Hong Liu, Manfang Chen, Xianyou Wang
Summary: A novel metal-organic framework (MOF) derivative called ZnCoFe-NC was designed and synthesized as a sulfur host for Li-S batteries. Its special hollow polyhedral structure provides physical trapping ability and chemisorption space for lithium polysulfides (LiPSs). The Zn, Co, Fe, and N doping not only have excellent chemisorption ability, but also high electrocatalytic activity, which accelerates the transformation of LiPSs and reduces their dissolution, improving the performance of Li-S batteries significantly.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Yu Lei, Guang Li, Juan Yang, Feng Zhang, Yongqiang Shen, Xiaoyan Zhang, Xianyou Wang
Summary: As a promising alternative to lithium-ion batteries, zinc-air batteries are recognized as a novel type of clean and environmentally friendlyenergy storage and conversion technology. In this study, a high-efficiency and cheap ORR catalyst, Fe3O4/Fe-N (x) dual catalytic active center (Fe-N-CS), was designed and prepared to overcome the limitation of low current density and large electrode polarization in the air cathode. The Fe-N-CS exhibited excellent ORR performance, surpassing Pt/C catalysts in terms of half-wave potential, onset potential, and stability.
Article
Chemistry, Physical
Heng Li, Zhi Li, Jiali Liu, Shuang Cao, Jiarui Chen, Hui Hu, Changmeng Guo, Xiaoyan Zhang, Xianyou Wang
Summary: The treatment of ammonium niobium oxalate can effectively improve the electrochemical performance of Co-free Li-rich layered oxides by creating oxygen vacancies and doping Nb5+ on the surface, leading to enhanced cycling stability and rate performance.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Electrochemistry
Guang Li, Kuang Sheng, Yu Lei, Feng Zhang, Juan Yang, Tianjing Wu, Liping Zheng, Xianyou Wang
Summary: Transition metal sulfides are considered as candidate oxygen redox catalysts due to their high catalytic activity and reversible redox performance. This study successfully synthesized Co9S8-FeCoS2 two-phase nanoparticles anchored in carbon spheres, which exhibited excellent catalytic performance and stability. This work provides an important approach to prepare highly efficient and stable dual-transition metal sulfide-modified carbon-based catalysts for oxygen reduction and oxygen evolution reactions.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Piaopiao Wen, Huangkai Wang, Xianyou Wang, Haibo Wang, Yansong Bai, Zhenhua Yang
Summary: This study proposes an effective method to enhance the Li-ion diffusion dynamics of two-dimensional layered niobium disulfide through palladium doping, leading to the development of an ultrahigh-rate and long-life anode material for Li-ion batteries.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
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)
