%0 Journal Article
%A Qi, Rui
%A Chu, Mihai
%A Zhao, Wenguang
%A Liao, Lei
%A Chen, Ziwei
%A Zheng, Shisheng
%A Chen, Xiping
%A Xie, Lei
%A Liu, Tongchao
%A Ren, Yang
%A Jin, Lei
%A Amine, Khalil
%A Pan, Feng
%A Xiao, Yinguo
%T A highly-stable layered Fe/Mn-based cathode with ultralow strain for advanced sodium-ion batteries
%J Nano energy
%V 88
%@ 2211-2855
%C Amsterdam [u.a.]
%I Elsevier
%M FZJ-2022-00259
%P 106206 -
%D 2021
%X Sodium-ion batteries (SIBs) with iron- and manganese-based cathode electrodes have exhibited great promise in the grid-scale energy storage systems, on the basis of the satisfactory theoretical capacity, as well as huge abundance, low price and non-toxicity of raw materials. However, the inferior cycle life of cathode materials originating from their poor structural stability remains a formidable challenge towards practical applications. Here, an efficient strategy of improving the structure durability is demonstrated in iron- and manganese-based cathodes by dual heteroatom doping. The as-obtained P2-type Na0.65Li0.08Cu0.08Fe0.24Mn0.6O2 cathode delivers superior cyclability (88.2% capacity retention for 500 cycles at 2C), fabulous rate capability (76% capacity retention at 5C compared to 0.1C), and a useable reversible capacity of around 85 mAh g−1 at 0.1C. Through in-depth characterizations, the underlying structure-property relationship is established, revealing that the complete solid-solution reaction during cycling ensures the ultralow volume variation (as small as 0.7%) and excellent electrochemical performance. These results highlight the significance of fabricating a stable host for the design and development of advanced SIBs with long life.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000702538600002
%R 10.1016/j.nanoen.2021.106206
%U https://juser.fz-juelich.de/record/904945