N-doped graphitic self-encapsulation for high performance silicon anodes in lithium-ion batteries

N-doped sites at CNT and graphene trigger spontaneous encapsulation of Si particles by simple pH control at room temperature. Significantly, N-doped CNT encapsulated Si composite electrode materials show remarkable cycle life and rate performance in battery operations. Superior capacity retention of...

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Bibliographic Details
Published in:Energy & environmental science 2014, Vol.7 (2), p.621-626
Main Authors: Lee, Won Jun, Hwang, Tae Hoon, Hwang, Jin Ok, Kim, Hyun Wook, Lim, Joonwon, Jeong, Hu Young, Shim, Jongwon, Han, Tae Hee, Kim, Je Young, Choi, Jang Wook, Kim, Sang Ouk
Format: Article
Language:English
Subjects:
Battery
Electrode materials
Encapsulation
Graphene
Lithium-ion batteries
Particulate composites
Silicon
Spontaneous
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Summary:N-doped sites at CNT and graphene trigger spontaneous encapsulation of Si particles by simple pH control at room temperature. Significantly, N-doped CNT encapsulated Si composite electrode materials show remarkable cycle life and rate performance in battery operations. Superior capacity retention of 79.4% is obtained after 200 cycles and excellent rate capability of 914 mA h g super(-1) is observed at a 10 C rate.
ISSN:1754-5692
1754-5706
DOI:10.1039/c3ee43322f