This title appears in the Scientific Report :
2020
Please use the identifier:
http://dx.doi.org/10.1038/s41560-020-00693-6 in citations.
Please use the identifier: http://hdl.handle.net/2128/26495 in citations.
Heuristic solution for achieving long-term cycle stability for Ni-rich layered cathodes at full depth of discharge
Heuristic solution for achieving long-term cycle stability for Ni-rich layered cathodes at full depth of discharge
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-...
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Personal Name(s): | Kim, Un-Hyuck |
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Park, Geon-Tae / Son, Byoung-Ki / Nam, Gyeong Won / Liu, Jun / Kuo, Liang-Yin / Kaghazchi, Payam / Yoon, Chong S. (Corresponding author) / Sun, Yang-Kook (Corresponding author) | |
Contributing Institute: |
Werkstoffsynthese und Herstellungsverfahren; IEK-1 |
Published in: | Nature energy, 5 (2020) S. 860 |
Imprint: |
London
Nature Publishing Group
2020
|
DOI: |
10.1038/s41560-020-00693-6 |
Document Type: |
Journal Article |
Research Program: |
Electrochemical Storage |
Link: |
Get full text Published on 2020-12-09. Available in OpenAccess from 2021-06-09. Published on 2020-12-09. Available in OpenAccess from 2021-06-09. |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/26495 in citations.
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. |