A cooperative biphasic MoOx–MoPx promoter enables a fast-charging lithium-ion battery

Sang-Min Lee, Junyoung Kim, Janghyuk Moon, Kyu-Nam Jung, Jong Hwa Kim, Gum-Jae Park, Jeong-Hee Choi, Dong Young Rhee, Jeom-Soo Kim, Jong-Won Lee () and Min-Sik Park ()
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Sang-Min Lee: Battery Research Center, Korea Electrotechnology Research Institute
Junyoung Kim: Kyung Hee University
Janghyuk Moon: Chung-Ang University
Kyu-Nam Jung: Korea Institute of Energy Research
Jong Hwa Kim: Kyung Hee University
Gum-Jae Park: Battery Research Center, Korea Electrotechnology Research Institute
Jeong-Hee Choi: Battery Research Center, Korea Electrotechnology Research Institute
Dong Young Rhee: Kyung Hee University
Jeom-Soo Kim: Dong-A University
Jong-Won Lee: Daegu Gyeongbuk Institute of Science and Technology (DGIST)
Min-Sik Park: Kyung Hee University

Nature Communications, 2021, vol. 12, issue 1, 1-9

Abstract: Abstract The realisation of fast-charging lithium-ion batteries with long cycle lifetimes is hindered by the uncontrollable plating of metallic Li on the graphite anode during high-rate charging. Here we report that surface engineering of graphite with a cooperative biphasic MoOx–MoPx promoter improves the charging rate and suppresses Li plating without compromising energy density. We design and synthesise MoOx–MoPx/graphite via controllable and scalable surface engineering, i.e., the deposition of a MoOx nanolayer on the graphite surface, followed by vapour-induced partial phase transformation of MoOx to MoPx. A variety of analytical studies combined with thermodynamic calculations demonstrate that MoOx effectively mitigates the formation of resistive films on the graphite surface, while MoPx hosts Li+ at relatively high potentials via a fast intercalation reaction and plays a dominant role in lowering the Li+ adsorption energy. The MoOx–MoPx/graphite anode exhibits a fast-charging capability (

Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-020-20297-8

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DOI: 10.1038/s41467-020-20297-8

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