首页|Enhancing thermodynamic stability of single-crystal Ni-rich cathode material via a synergistic dual-substitution strategy

Enhancing thermodynamic stability of single-crystal Ni-rich cathode material via a synergistic dual-substitution strategy

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
Nickel(Ni)-rich cathode materials have become promising candidates for the next-generation electrical vehicles due to their high specific capacity.However,the poor thermodynamic stability(including cyclic performance and safety performance or thermal stability)will restrain their wide commercial applica-tion.Herein,a single-crystal Ni-rich LiNi0.83Co0.12Mn0.05O2 cathode material is synthesized and modified by a dual-substitution strategy in which the high-valence doping element improves the structural stabil-ity by forming strong metal-oxygen binding forces,while the low-valence doping element eliminates high Li+/Ni2+mixing.As a result,this synergistic dual substitution can effectively suppress H2-H3 phase transition and generation of microcracks,thereby ultimately improving the thermodynamic stability of Ni-rich cathode material.Notably,the dual-doped Ni-rich cathode delivers an extremely high capacity retention of 81％after 250 cycles(vs.Li/Li+)in coin-type half cells and 87％after 1000 cycles(vs.gra-phite/Li+)in pouch-type full cells at a high temperature of 55 ℃.More impressively,the dual-doped sam-ple exhibits excellent thermal stability,which demonstrates a higher thermal runaway temperature and a lower calorific value.The synergetic effects of this dual-substitution strategy pave a new pathway for addressing the critical challenges of Ni-rich cathode at high temperatures,which will significantly advance the high-energy-density and high-safety cathodes to the subsequent commercialization.

Ni-rich cathodeSingle crystallineDual-substitution strategyHigh-temperature cathodeLi-ion batteries

Jixue Shen、Hui Li、Haoyu Qi、Zhan Lin、Zeheng Li、Chuanbo Zheng、Weitong Du、Hao Chen、Shanqing Zhang

展开 >

School of Metallurgy Engineering,Jiangsu University of Science and Technology,Zhangjiagang 215600,Jiangsu,China

School of Metallurgy and Environment,Central South University,Changsha 410083,Hunan,China

Guangdong Laboratory of Chemistry and Fine Chemical Industry Jieyang Center,Jieyang 515200,Guangdong,China

Institute of Sustainable Transformation,School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou 510006,Guangdong,China

Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology,College of Chemical and Biological Engineering,Zhejiang University,Hangzhou 310027,Zhejiang,China

Centre for Catalysis and Clean Energy,School of Environment and Science,Gold Coast Campus,Griffith University,Gold Coast 4222,Queensland,Australia

展开 >

Natural Science Foundation of Jiangsu Province,ChinaJiangsu Provincial Double Innovation Program,ChinaNatural Science Fund for Colleges and Universities of Jiangsu Province,ChinaJiangsu University of Science and Technology Doctoral Research Startup Fund,China

BK20210887JSSCB2021098421KJB450003120200012

2024

10.1016/j.jechem.2023.09.038

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.88(1)
  • 65