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나노입자 연구단
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Additional Lithium Storage on Dynamic Electrode Surface by Charge Redistribution in Inactive Ru Metal

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Title
Additional Lithium Storage on Dynamic Electrode Surface by Charge Redistribution in Inactive Ru Metal
Author(s)
Kim, Y; Um, JH; Hyunjoon Lee; Choi, W; Choi, WI; Lee, HS; Kim, OH; Kim, JM; Cho, YH; Yoon, WS
Publication Date
2020-01
Journal
SMALL, v.16, no.1, pp.1905868 -
Publisher
WILEY-V C H VERLAG GMBH
Abstract
Beyond a traditional view that metal nanoparticles formed upon electrochemical reaction are inactive against lithium, recently their electrochemical participations are manifested and elucidated as catalytic and interfacial effects. Here, ruthenium metal composed of approximate to 5 nm nanoparticles is prepared and the pure ruthenium as a lithium-ion battery anode for complete understanding on anomalous lithium storage reaction mechanism is designed. In particular, the pure metal electrode is intended for eliminating the electrochemical reaction-derived Li2O phase accompanied by catalytic Li2O decomposition and the interfacial lithium storage at Ru/Li2O phase boundary, and thereby focusing on the ruthenium itself in exploring its electrochemical reactivity. Intriguingly, unusual lithium storage not involving redox reactions with electron transfer but leading to lattice expansion is identified in the ruthenium electrode. Size-dependent charge redistribution at surface enables additional lithium adsorption to occur on the inactive but more environmentally sensitive nanoparticles, providing innovative insight into dynamic electrode environments in rechargeable lithium chemistry. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
URI
https://pr.ibs.re.kr/handle/8788114/7259
ISSN
1613-6810
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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