Probing the Additional Capacity and Reaction Mechanism of the RuO2 Anode in Lithium Rechargeable Batteries
- Authors
- Kim, Yunok; Muhammad, Shoaib; Kim, Hyunchul; Cho, Yong-Hun; Kim, Hansu; Kim, Ji Man; Yoon, Won-Sub
- Issue Date
- Jul-2015
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- batteries; capacity; metal oxide anode; reaction mechanism; ruthenium
- Citation
- CHEMSUSCHEM, v.8, no.14, pp.2378 - 2384
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMSUSCHEM
- Volume
- 8
- Number
- 14
- Start Page
- 2378
- End Page
- 2384
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/156885
- DOI
- 10.1002/cssc.201403488
- ISSN
- 1864-5631
- Abstract
- The structural changes and electrochemical behavior of RuO2 are investigated by using insitu XRD, X-ray absorption spectroscopy, and electrochemical techniques to understand the electrochemical reaction mechanism of this metal oxide anode material. Intermediate phase-assisted transformation of RuO2 to LiRuO2 takes place at the start of discharge. Upon further lithiation, LiRuO2 formed by intercalation decomposes to nanosized Ru metal and Li2O by a conversion reaction. A reversible capacity in addition to its theoretical capacity is observed on discharging below 0.5V during which no redox activity involving Ru is observed. TEM, X-ray photoelectron spectroscopy, and the galvanostatic intermittent titration technique are used to probe this additional capacity. The results show that the additional capacity is a result of Li storage in the grain boundary between nanosized Ru metal and Li2O. Findings of this study provide a better understanding of the quantitative share of capacity by a unique combination of intercalation, conversion, and interfacial Li storage in a RuO2 anode.
- Files in This Item
-
Go to Link
- Appears in
Collections - 서울 공과대학 > 서울 에너지공학과 > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/156885)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.