Novel synthesis method of cobalt hydroxycarbonate hydrate-reduced graphene oxide composite microspheres for lithium-ion battery anode
- Authors
- Kim, Dae Hyun; Park, Gi Dae; Kang, Yun Chan
- Issue Date
- 11월-2021
- Publisher
- WILEY
- Keywords
- conversion reaction; heterointerfaced structure; lithium-ion batteries; metal hydroxy carbonate hydrate; reduced graphene oxide
- Citation
- INTERNATIONAL JOURNAL OF ENERGY RESEARCH, v.45, no.14, pp.20302 - 20317
- Indexed
- SCIE
SCOPUS
- Journal Title
- INTERNATIONAL JOURNAL OF ENERGY RESEARCH
- Volume
- 45
- Number
- 14
- Start Page
- 20302
- End Page
- 20317
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/135821
- DOI
- 10.1002/er.7115
- ISSN
- 0363-907X
- Abstract
- Transition metal compounds (TMCs) consisting of multiple anions are considered as efficient anode materials for lithium-ion batteries (LIBs) owing to their characteristic of transforming into multiple metal compounds with single anions during the first cycle. Nanostructured composites of TMCs with multiple anions and a conductive carbon component can enhance lithium-ion storage through the synergistic effects of the formation of heterointerfaced structures, structural stability, and high conductivity. Herein, cobalt hydroxycarbonate hydrate-reduced graphene oxide (CoHC-rGO) composite microspheres are introduced. The spray pyrolysis process facilitates formation of cobalt chloride-rGO composite precursor powders. The prepared precursor powders are finally converted into CoHC-rGO composites through in-situ precipitation within the microspheres. The conversion mechanism of CoHC-rGO with lithium ions is systemically scrutinized via rational in-situ and ex-situ analyses. Uniquely structured CoHC-rGO microspheres exhibit better electrochemical properties than the bare CoHC nanopowders. The CoHC-rGO microspheres have high reversibility of 440 mA h g(-1) at 1500th cycle even at 5 A g(-1).
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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