Search

Your search keyword '"Liao, Jiaxuan"' showing total 9 results
Start Over Author "Liao, Jiaxuan" Publisher royal society of chemistry (rsc)
9 results on '"Liao, Jiaxuan"'

5. Graphene coated Co3V2O8 micro-pencils for enhanced-performance in lithium ion batteries

Author

Jiang Weiwei, Liao Jiaxuan, Feng Gong, Jian Yang, Dawei Xia, Tingting Feng, and Mengqiang Wu

Subjects
Graphene, Oxide, chemistry.chemical_element, Nanotechnology, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, Electrochemistry, 01 natural sciences, Catalysis, Grain size, 0104 chemical sciences, Anode, law.invention, chemistry.chemical_compound, chemistry, Transition metal, law, Materials Chemistry, Hydrothermal synthesis, Lithium, 0210 nano-technology
Abstract

Transition metal vanadates have attracted much attention for high capacity anodes of lithium ion batteries (LIBs). However, they have obvious drawbacks (short cycle-lives and low rate performance) because of the intrinsically low electronic conductivity and serious volume variation during Li-ion desorption and insertion. In particular, pure Co3V2O8 micro-pencils (pCVO MPs) have a stable and regular crystal structure, large tap density and uniform grain size, but, unfortunately, they have not exhibited expected electrochemical performance. Herein, we report the successful preparation of reduced graphene oxide coated Co3V2O8 micro-pencils (rGO@CVO MPs) through a facile approach combining hydrothermal synthesis with thermal reduction. When tested as anodes for LIBs, rGO@CVO MPs exhibit superior electrochemical performance compared to that of pure Co3V2O8 micro-pencils (pCVO MPs). The anodes of rGO@CVO MPs show a high reversible capacity of 760 mA h g−1 over 200 cycles at 200 mA g−1, and 500 mA h g−1 can remain after 500 cycles at 1000 mA g−1, with an increase in 200 mA h g−1 in contrast to the pCVO MPs. It is consequently demonstrated that the composite material (rGO@CVO MPs) is a promising anode material for LIBs.

Published
2017

Catalog

Books, media, physical & digital resources
See catalog results