Journal
SCIENCE CHINA-MATERIALS
Volume 61, Issue 5, Pages 671-678Publisher
SCIENCE PRESS
DOI: 10.1007/s40843-017-9185-3
Keywords
two-dimensional materials; lithium-ion battery; sodium-ion battery; core-shell nanocables; binder-free
Categories
Funding
- Ministry of Science and Technology of China [2012CB933403]
- National Natural Science Foundation of China [51425302, 51302045, 5170021056]
- Beijing Municipal Science and Technology Commission [Z121100006812003]
- State Key Laboratory of Advanced Technology for Float Glass
- Chinese Academy of Sciences
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WS2 has been considered as a promising anode material due to its high lithium storage capacity as well as fascinating physical properties. However, the insufficient electrical and ionic conductivities deteriorate the rate performance of the batteries. Herein, we report a simple synthetic approach towards graphene-WS2 hybrids by rolling graphene into a hollow nanotube in which WS2 nanoplates are encapsulated. This new electrode design strategy facilitates the fabrication of integrated and binder-free lithium ion battery and sodium ion battery electrodes by combining electrospinning and chemical vapor deposition (CVD) methods. Benefiting from their confined growth and the interconnected in-situ graphitic carbon coating nanocable web, the WS2@G with nano-level WS2 dispersion not only provides an efficiently conductive and electrolyte accessible framework, but effectively alleviates the volume change during the cycling, enabling a mechanically robust binder-free electrode along with the outstanding electrochemical Li+ and Na+ storage properties.
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