Critical role of elemental copper for enhancing conversion kinetics of sulphur cathodes in rechargeable magnesium batteries

Title
Critical role of elemental copper for enhancing conversion kinetics of sulphur cathodes in rechargeable magnesium batteries
Authors
조병원오시형나수빈이보은최지환Dong-Joo YooJong-Hak KimYong-Tae KimTaeeun YimJang Wook Choi
Keywords
magnesium batteries; sulphur cathode; copper; catalyst
Issue Date
2019-08
Publisher
Applied surface science
Citation
VOL 484-940
Abstract
Despite recent remarkable progress associated with the electrolyte, understanding of the reaction mechanism of magnesium-sulphur batteries is not yet mature. In particular, the lethargic redox reactions involved in the electrochemical conversion of sulphur and MgS in the cathode need to be overcome. Here, we unveil the reaction mechanism involving copper (Cu) metal, a common current collector for electrodes in rechargeable batteries. Specifically, Cu can undergo chemical reactions with polysulphides produced from the reaction of sulphur or MgS with Mg2+. Throughout the conversion reaction, these Cu– polysulphide reactions play a critical role to improve reaction kinetics markedly. The present investigation opens new avenues to the emerging MgS battery technology, that is, the incorporation of various metals that can speed up the conversion reaction between sulphur and Mg.
URI
http://pubs.kist.re.kr/handle/201004/69480
ISSN
0169-4332
Appears in Collections:
KIST Publication > Article
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