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Enhanced electrochemical performance of carbon-coated Li2MnSiO4 nanoparticles synthesized by tartaric acid-assisted sol-gel process
- Authors
- Park, Kyung-Soo; Jin, Yun-Ho; Kang, Lee-Seung; Lee, Gwang-Hee; Lee, Nam-Hee; Kim, Dong-Wan; Hong, Hyun Seon
- Issue Date
- 8월-2014
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Sol-gel processes; Nanocomposites; Silicate; Batteries; Electrochemical reactions
- Citation
- CERAMICS INTERNATIONAL, v.40, no.7, pp.9413 - 9418
- Indexed
- SCIE
SCOPUS
- Journal Title
- CERAMICS INTERNATIONAL
- Volume
- 40
- Number
- 7
- Start Page
- 9413
- End Page
- 9418
- ISSN
- 0272-8842
- Abstract
- A tartaric acid-assisted sol gel process was used to synthesize Li2MnSiO4 (SG-LMS) nanopowders with orthorhombic structures (Pmn2(1) space group). The Li-active SG-LMS nanoparticles were fully surrounded by a conducting amorphous carbon layer/matrix that was formed by carbonization of the tartaric acid during post-annealing of the dry gel. The SG-LMS electrode exhibited higher specific capacity and superior cycle retention as compared to the LMS electrode prepared by a conventional solid-state reaction. Such high electrochemical performance originated from the presence of a high-purity phase, a large surface area, and an efficient electron transport path facilitated by the conductive carbon coating of the SG-LMS electrode. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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