%0 Journal Article
%A Kim, Un-Hyuck
%A Park, Geon-Tae
%A Son, Byoung-Ki
%A Nam, Gyeong Won
%A Liu, Jun
%A Kuo, Liang-Yin
%A Kaghazchi, Payam
%A Yoon, Chong S.
%A Sun, Yang-Kook
%T Heuristic solution for achieving long-term cycle stability for Ni-rich layered cathodes at full depth of discharge
%J Nature energy
%V 5
%@ 2058-7546
%C London
%I Nature Publishing Group
%M FZJ-2020-03879
%P 860
%D 2020
%X The demand for energy sources with high energy densities continues to push the limits of Ni-rich layered oxides, which are currently the most promising cathode materials in automobile batteries. Although most current research is focused on extending battery life using Ni-rich layered cathodes, long-term cycling stability using a full cell is yet to be demonstrated. Here, we introduce Li[Ni0.90Co0.09Ta0.01]O2, which exhibits 90% capacity retention after 2,000 cycles at full depth of discharge (DOD) and a cathode energy density >850 Wh kg−1. In contrast, the currently most sought-after Li[Ni0.90Co0.09Al0.01]O2 cathode loses ~40% of its initial capacity within 500 cycles at full DOD. Cycling stability is achieved by radially aligned primary particles with [003] crystallographic texture that effectively dissipate the internal strain occurring in the deeply charged state, while the substitution of Ni3+ with higher valence ions induces ordered occupation of Ni ions in the Li slab and stabilizes the delithiated structure.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000571739400005
%R 10.1038/s41560-020-00693-6
%U https://juser.fz-juelich.de/record/885498