Reactive boride infusion stabilizes Ni-rich cathodes for lithium-ion batteries
Name
1775110.pdf
Description
Accepted version
Size
1.62 MB
Format
Adobe PDF
Checksum (MD5)
d7e3a4967f369a0bf4b6305941626c4b
Author(s)
Yoon, Moonsu
Dong, Yanhao
Hwang, Jaeseong
Sung, Jaekyung
Cha, Hyungyeon
Ahn, Kihong
Huang, Yimeng
Kang, Seok Ju
Li, Ju
Cho, Jaephil
Date Issued
2021
Journal
Nature Energy
Publisher
Springer Science and Business Media LLC
Citation
Yoon, Moonsu, Dong, Yanhao, Hwang, Jaeseong, Sung, Jaekyung, Cha, Hyungyeon et al. 2021. "Reactive boride infusion stabilizes Ni-rich cathodes for lithium-ion batteries." Nature Energy, 6 (4).
Version
Author's final manuscript
Abstract
© 2021, The Author(s), under exclusive licence to Springer Nature Limited. Engineered polycrystalline electrodes are critical to the cycling stability and safety of lithium-ion batteries, yet it is challenging to construct high-quality coatings at both the primary- and secondary-particle levels. Here we present a room-temperature synthesis route to achieve a full surface coverage of secondary particles and facile infusion into grain boundaries, and thus offer a complete ‘coating-plus-infusion’ strategy. Cobalt boride metallic glass was successfully applied to a Ni-rich layered cathode LiNi0.8Co0.1Mn0.1O2. It dramatically improved the rate capability and cycling stability, including under high-discharge-rate and elevated-temperature conditions and in pouch full-cells. The superior performance originates from a simultaneous suppression of the microstructural degradation of the intergranular cracking and of side reactions with the electrolyte. Atomistic simulations identified the critical role of strong selective interfacial bonding, which offers not only a large chemical driving force to ensure uniform reactive wetting and facile infusion, but also lowers the surface/interface oxygen activity, which contributes to the exceptional mechanical and electrochemical stabilities of the infused electrode.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1038/S41560-021-00782-0
