摘要
Strategies to prolong operational life are highly pursued to strengthen the advantage of cost-effectiveness on sodium-ion batteries(SIBs).We demonstrate the crucial influence of particles'internal mechanical strains on durability of cathode,which does not attract enough attentions from the community.Among the investigated samples,2%Ti-modified-Na_(0.67)Ni_(0.1)Co_(0.1)Mn_(0.8)O_(2 )suppresses the c-axis lattice variation by 38%,attains the reversible capacity 86%higher after 200 cycles,and still keeps intact morphology.This approach indicates that the mechanical properties could tailor cyclic stability of cathode,which is particular important to further improve competitiveness for SIBs.
作者
Zhongmin Ren
Muqin Wang
Shuaishuai Chen
Lei Ding
Hua Li
Jian Liu
Jieyun Zheng
Zhihong Liu
Deyu Wang
Mingkui Wang
任重民;王木钦;陈帅帅;丁雷;李华;刘健;郑杰允;刘志宏;王德宇;王鸣魁(Key Laboratory of Optoelectronic Chemical Materials and Devices,School of Chemical and Environmental Engineering,Jianghan University,Wuhan 430056,China;Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China;Wuhan National Laboratory for Optoelectronics,Huazhong University of Science&Technology,Wuhan 430074,China;Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China)
基金
Supported by the China Postdoctoral Science Foundation (Grant No. 2020M682391)
Beijing Municipal Science and Technology Commission (Grant No. Z191100004719001)
the Start-Up Funding of Jianghan University
the “Chutian Scholar Program” of Hubei Province
