Article
Materials Science, Multidisciplinary
Zhi-kun Zhao, Hui-lin Xie, Zi-yue Wen, Ling Liu, Bo-rong Wu, Shi Chen, Dao-bin Mu, Chao-xiang Xie
Summary: Decorating nickel-rich LiNi0.6Co0.2Mn0.2O2 cathode material with stable and conductive Li3PO4 can significantly improve the electrochemical performance, with 2wt% coating showing the best results among different concentrations. In-situ X-ray diffraction analysis further confirms the protective effect of the modification on the cathode structure under high voltages.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Yan Wang, Yadong Zheng, Luqman Azhari, Zifei Meng, Guanhui Gao, Yimo Han, Zhenzhen Yang
Summary: The presence of phosphate impurities in the hydrometallurgical recycling of NCM cathode materials has a detrimental effect on the diffusion and electrochemical properties of the recycled materials, hindering their performance. Therefore, these impurities need to be excluded from the recycling process.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Weimin Zhao, Guorui Zheng, Yuchen Ji, Chengxin Peng, Fucheng Ren, Ming Liu, Feng Pan, Yong Yang
Summary: This research successfully addressed the issue of undesired interfacial instability on both cathode and anode by constructing reliable and compact interface films using a multifunctional additive. These films improved the cycling stability and Coulombic efficiency of the batteries, as well as enhanced rate capability and low temperature performance. The study also provided new insights into the interface formation mechanisms and the role of additives in improving the electrochemical performance of high-energy batteries.
ENERGY STORAGE MATERIALS
(2022)
Article
Chemistry, Physical
Guorong Hu, Shuai Zhang, Ke Du, Zhongdong Peng, Jingyao Zeng, Zijun Fang, Luyu Li, Yinjia Zhang, Jiangnan Huang, Dichang Guan, Min Huang, Xudong Zhang, Yanbing Cao
Summary: The synthesis of Ni-based layered oxides with single-crystal morphology is challenging. In this study, Ba2+ is introduced into the synthesis process of LiNi0.6Co0.2Mn0.2O2 single-crystal material to assist the formation of single-crystal materials. The introduction of Ba2+ reduces diffusion energy at grain boundaries and promotes particle coalescence, resulting in improved cycle performance of the cathode.
JOURNAL OF POWER SOURCES
(2022)
Article
Materials Science, Multidisciplinary
Dong-Hyun Kim, Joongchul Park, Jae-Dong Joe, Yonggyun Jung, Yonkyun Song, Yoon-Uk Heo
Summary: This study improves the poor phosphatability issue in multi-phase steel by using the strategy of decarburization annealing and pickling, and proposes a method to enhance the dissolution rate of the phosphatatibility in the steel.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
Haiyan Luo, Baodan Zhang, Haitang Zhang, Qizheng Zheng, Xiaohong Wu, Yawen Yan, Zhengang Li, Yonglin Tang, Weiwei Hao, Gaowa Liu, Yu-hao Hong, Jinyu Ye, Yu Qiao, Shi-Gang Sun
Summary: The cathode electrolyte interphase (CEI) layers, derived from the oxidative decomposition of electrolyte, can protect the cathode surface and prevent contact with the electrolyte. The CEI layer consists of an inorganics-dominated inner solid electrolyte layer (SEL) and an organics-rich outer quasi-solid-electrolyte layer (qSEL), which merge without a clear boundary. However, the traditional characterization method can dissolve the qSEL and destroy the SEL, leading to overanalysis and misassignment of CEI architecture. In this study, we established a comprehensive characterization paradigm and successfully reconstructed the original CEI layer model using various technology.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Binbin Chu, Guangxin Li, Longzhen You, Tao Huang, Mengmeng Liu, Aishui Yu
Summary: The study successfully improved the air stability of high-nickel cathode materials using a Li2WO4/WO3 coating, maintaining good discharge capacity and providing a basis for enhancing the storage stability of these materials.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Liu Yao, Yanpei Li, Xingpeng Gao, Mingli Cai, Jun Jin, Jianhua Yang, Tongping Xiu, Zhen Song, Michael E. Badding, Zhaoyin Wen
Summary: The study introduced a strategy of Zr doping and LixZryOz surface coating to improve the cycling stability and capacity retention of Ni-rich NCM cathode materials, with enhanced bulk stability and optimized microstructure contributing to the improved performance.
ENERGY STORAGE MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Honghui Diao, Mengyang Jia, Ning Zhao, Xiangxin Guo
Summary: This work investigates NCM622 cathodes coated with ionic-electronic dual-conductive polymers for high-energy density and safe solid lithium batteries. The coated cathodes exhibit higher specific capacity, better capacity retention, and improved rate performance compared to the pristine cathodes.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Kai Du, Maokun Wu, Xinhong Hu, Wei-hua Wang, Du Pan, Zhenbo Wang, Yanfeng Yin, Huiling Zhao, Ying Bai
Summary: This study demonstrates a synergetic approach to improve the microstructural and thermal stabilities of Ni-rich LiNi0.6Co0.2Mn0.2O2 (NCM622) cathode material through the thermal expansion offset effect of LiZr2(PO4)(3) (LZPO) modification layer. The optimized NCM622@LZPO cathode shows a significantly enhanced cyclability with high capacity retention after multiple cycles and under elevated temperatures. Chemical environment analysis and powder diffraction spectra reveal the role of the negative thermal expansion LZPO coating in promoting microstructural stability and suggest the potential of introducing negative thermal expansion functional compounds in addressing stress accumulation and volume expansion issues for advanced secondary-ion batteries.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Jong Hun Sung, Tae Wan Kim, Hyeong-Ku Kang, So Young Choi, Fuead Hasan, Sangram Keshari Mohanty, Jinhong Kim, Madhusudana Koratikere Srinivasa, Heon-Cheol Shin, Hyun Deog Yoo
Summary: The study found that coating nickel-rich NCM cathodes with Li3PO4 can enhance their cycle stability and rate capability, with the 2 wt% coating level showing the best performance.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Wenqian Zhang, Li Xiao, Jiangfeng Zheng, Yuelian Zhong, Bo Shi, Han Chen, Haikuo Fu
Summary: The electrochemical properties and thermal stability of LiNi0.6Co0.2Mn0.2O2 (NCM622) material were significantly improved by Nb2O5 nanocoating, which showed good cyclic performance and discharge capacity. The nano coating greatly increased thermal stability and specific capacity, maintaining a relatively complete structure after cycling. The surface coating can enhance the electrochemical properties of cathode materials and extend battery life.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Kai Du, Ang Gao, Liufei Gao, Shuwei Sun, Xia Lu, Caiyan Yu, Shiyu Li, Huiling Zhao, Ying Bai
Summary: In this study, a negative thermal expansion material (ZVO) was used as a coating layer to enhance the structure stability and electrochemical performance of Ni-rich cathode material LiNi0.6Co0.2Mn0.2 O2. The NCM622@1.0 wt % ZVO sample showed excellent cyclability and rate capability under high temperature cycling, indicating the potential of ZVO in improving the bulk structure stability and interface compatibility of modified NCM622.
Article
Electrochemistry
Ana Cristina Martinez, Sebastien Rigaud, Sylvie Grugeon, Pierre Tran-Van, Michel Armand, Dominique Cailleu, Serge Pilard, Stephane Laruelle
Summary: This paper investigates the reactivity of LiPO2F2 in lithium-ion batteries and its potential to enhance capacity retention. By analyzing the degradation products of the electrolyte, the study reveals the mechanisms of LiPO2F2's reactivity and discusses the regulation of electrolyte solvent degradation.
ELECTROCHIMICA ACTA
(2022)
Article
Nanoscience & Nanotechnology
Yadong Zheng, Ruihan Zhang, Panawan Vanaphuti, Yangtao Liu, Zhenzhen Yang, Yan Wang
Summary: Research shows that a small amount of fluorine impurity can increase the ratio of nickel ions on the surface of the recovered material, while also forming holes in cathode particles, significantly improving rate capability and cyclability. Compared to the original material, NCM622 material with 0.2 at. % fluorine impurity has an increased capacity of about 8% and retains 98.0% capacity after 100 cycles at 0.33 C. Additionally, the cathode with 0.2 at. % fluorine impurity exhibits better rate performance, especially at high rates with about 7% improvement at 5 C, enhancing its overall performance.
ACS APPLIED MATERIALS & INTERFACES
(2021)
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)