High-Energy-Density Li-Ion Battery Reaching Full Charge in 12 min
- Authors
- Kim, Un-Hyuck; Lee, Soo-Been; Park, Nam-Yung; Kim, Suk Jun; Yoon, Chong Seung; Sun, Yang Kook
- Issue Date
- Nov-2022
- Publisher
- American Chemical Society
- Citation
- ACS Energy Letters, v.7, no.11, pp.3880 - 3888
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS Energy Letters
- Volume
- 7
- Number
- 11
- Start Page
- 3880
- End Page
- 3888
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/185244
- DOI
- 10.1021/acsenergylett.2c02032
- ISSN
- 2380-8195
- Abstract
- The continuous expansion of the electric vehicle (EV) market is driving the demand for high-energy-density batteries using Ni-rich cathodes. However, the operation of Ni-rich cathodes under extreme-fast-charging (XFC) conditions compromises their structural integrity, resulting in rapid capacity fading; realizing Ni-rich cathodes operable under XFC conditions while maximizing energy density and long-term cycling performance is challenging. This study introduces a Li[Ni0.92Co0.06Al0.01Nb0.01]O2 (Nb-NCA93) cathode with a high energy density of 869 Wh kg-1. The presence of Nb in the Nb-NCA93 cathode induces the grain refinement of its secondary particles, alleviating internal stress and preventing heterogeneity of Li concentration during cycling. A resulting full-cell reaches full charge within 12 min and retains 85.3% of its initial capacity after 1000 cycles (cycled at full depth of discharge). In addition, the Nb-NCA93 cathode generates limited heat under XFC conditions due to its refined microstructure.
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