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

Title
A cooperative biphasic MoOx–MoPx promoter enables a fast-charging lithium-ion battery
Authors
Lee, Sang-MinKim, JunyoungMoon, JanghyukJung, Kyu-NamKim, Jong HwaPark, Gum-JaeChoi, Jeong-HeeRhee, Dong YoungKim, Jeom-SooLee, Jong-WonPark, Min-Sik
DGIST Authors
Lee, Sang-Min; Kim, Junyoung; Moon, Janghyuk; Jung, Kyu-Nam; Kim, Jong Hwa; Park, Gum-Jae; Choi, Jeong-Hee; Rhee, Dong Young; Kim, Jeom-Soo; Lee, Jong-Won; Park, Min-Sik
Issue Date
2021-01
Citation
Nature Communications, 12(1), 39
Type
Article
Article Type
Article
Keywords
chemical reactiondetection methodelectrodeequipmentgraphiteinorganic compoundproteinthermodynamicstransformation
ISSN
2041-1723
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 (<10 min charging for 80% of the capacity) and stable cycling performance without any signs of Li plating over 300 cycles when coupled with a LiNi0.6Co0.2Mn0.2O2 cathode. Thus, the developed approach paves the way to the design of advanced anode materials for fast-charging Li-ion batteries. © 2021, The Author(s).
URI
http://hdl.handle.net/20.500.11750/12732
DOI
10.1038/s41467-020-20297-8
Publisher
Nature Publishing Group
Related Researcher
  • Author Lee, Jong-Won Laboratory for Electrochemical Energy Materials and Interfaces
  • Research Interests 이차전지, 연료전지, 재료전기화학, 나노에너지소재
Files:
Collection:
Department of Energy Science and EngineeringLaboratory for Electrochemical Energy Materials and Interfaces1. Journal Articles


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