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MnO nanocrystals incorporated in a N-containing carbon matrix for Li ion battery anodes

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Title: MnO nanocrystals incorporated in a N-containing carbon matrix for Li ion battery anodes
Authors: Zhu, Chunyu Browse this author →KAKEN DB
Han, Cheng-gong Browse this author
Saito, Genki Browse this author →KAKEN DB
Akiyama, Tomohiro Browse this author →KAKEN DB
Keywords: manganese oxide
lithium ion battery,
anode material
composite
carbon
Issue Date: 16-Mar-2016
Publisher: Royal Society of Chemistry
Journal Title: RSC advances
Volume: 6
Issue: 36
Start Page: 30445
End Page: 30453
Publisher DOI: 10.1039/c6ra00571c
Abstract: In this study, MnO nanocrystals incorporated in a N-containing carbon matrix were fabricated by the facile thermal decomposition of manganese nitrate-glycine gels. MnO/C composites with different carbon contents were prepared by controlling the initial ratio of manganese to glycine. The composition, phase structure and morphology of the composites were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy, scanning and transmission electron microscopy, and thermogravimetric analysis. The results indicated that MnO nanocrystals were uniformly embedded in the N-doped carbon matrix. The carbon matrix could effectively enhance the electrical conductivity of MnO and alleviate the strain arising from the discharge/charge cycling. The composite materials exhibited high discharge/charge capacities, superior cycling performance, and excellent rate capability. A high reversible capacity of 556 mA h g(-1) was obtained after 110 cycles of discharging and charging at a current rate of 0.5 A g(-1). Even at a high current rate of 3 A g(-1), the sample still delivered a capacity of around 286 mA h g(-1). The easy production and superior electrochemical properties enables the composites to be a promising candidate as an anode alternative for high-performance lithium-ion batteries.
Type: article (author version)
URI: http://hdl.handle.net/2115/64713
Appears in Collections:エネルギー・マテリアル融合領域研究センター (Center for Advanced Research of Energy and Material) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 朱 春宇

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