NDLI: Co2+xTi1−xO4 nano-octahedra as high performance anodes for lithium-ion batteries

Content Provider	Royal Society of Chemistry (RSC)
Author	Zhuang, Quan-chao Zhao, Yulong Ju, Zhicheng Ren, Haipeng Ji, Xiang Xing, Zheng Deng, Yichen
Copyright Year	2017
Abstract	Single crystal Co2+xTi1−xO4 nano-octahedra enclosed by {111} planes with an average edge length of 200 nm were synthesized via a one-step hydrothermal approach using economical TiO2 as a titanium source. The structure of Co2+xTi1−xO4 is actually an inverse spinel solid solution with an excess amount of Co. As anode materials for lithium-ion batteries (LIBs), the Co2+xTi1−xO4 electrode delivered a high specific capacity of over 766.5 mA h g−1 at the current density of 100 mA g−1 after 60 cycles; moreover, it provided stable rate capability and lithium storage performance at the high current density of 680 mA h g−1 after 400 cycles at 1000 mA g−1. This excellent electrochemical performance is mainly derived from the atomic-level combination of two active materials (CoO and TiO2 matrix) via different lithium storage mechanisms (conversion reaction and insertion/extraction, respectively) after the initial discharge process. In particular, the nanostructured TiO2 matrix formed after the first cycle in the electrode would alleviate large volume changes and avoid rapid capacity fading, which could endow Co2+xTi1−xO4 electrodes with excellent structural stability.
Starting Page	8714
Ending Page	8724
Page Count	11
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	5
Issue Number	18
Journal	Journal of Materials Chemistry A
DOI	10.1039/c7ta01152k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Single crystal Titanium Spinel Solid solution Anode Lithium-ion battery Electrode Electric current 60 Cycles Lithium Electrochemistry Composite material
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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