We present a fabrication of scalable coaxial core/shell silicon (Si)-graphene fiber prepared by dual-nozzle-induced wet-spinning assembly for high-performance Si anode. Over 50 wt% of Si nanoparticles mixed with graphene oxide suspension can be incorporated in the core with the outstanding dispersibility of unique silver-coated Si nanoparticles in aqueous media. The core fiber is further encapsulated by graphene shell which not only provides conducting pathways, but also alleviates severe volume expansion of Si core. This novel core/shell Si anode with double locked graphene architecture delivers more stable cycle performance and superior rate capability than anodes composed of simple mixture of Si-graphene composites.
Bibliographical noteFunding Information:
This research was supported by the Development Program of the Korea Institute of Energy Research (KIER) ( B4-2424 ) and by the National Research Foundation of Korea (NRF) grant ( NRF-2014R1A2A1A11052829 and 2015–01003143 ). M. Gu acknowledges financial support from the Global Ph.D. Fellowship (GPF) funded by National Research Foundation of Korea (NRF) ( NRF-2013H1A2A1033278 ).
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All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering