Journal
SMALL
Volume 14, Issue 25, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201800635
Keywords
chemical vapor deposition; graphene; lithium-ion batteries; magnesiothermic reduction; silicon
Categories
Funding
- Center of HK Graphene Technology and Energy Storage
- UCLA Dynavolt Research Center
- 973 Program of China [2014CB239701]
- Natural Science Foundation of China [51672128, 21773118]
- Funding for Outstanding Doctoral Dissertation in NUAA [BCXJ14-12]
- China Scholarship Council [201406830023]
Ask authors/readers for more resources
Silicon holds great promise as an anode material for lithium-ion batteries with higher energy density; its implication, however, is limited by rapid capacity fading. A catalytic growth of graphene cages on composite particles of magnesium oxide and silicon, which are made by magnesiothermic reduction reaction of silica particles, is reported herein. Catalyzed by the magnesium oxide, graphene cages can be conformally grown onto the composite particles, leading to the formation of hollow graphene-encapsulated Si particles. Such materials exhibit excellent lithium storage properties in terms of high specific capacity, remarkable rate capability (890 mAh g(-1) at 5 A g(-1)), and good cycling retention over 200 cycles with consistently high coulombic efficiency at a current density of 1 A g(-1). A full battery test using LiCoO2 as the cathode demonstrates a high energy density of 329 Wh kg(-1).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available