1. Hierarchically porous nitrogen, oxygen-rich carbons derived from filter paper for high-performance lithium ion battery anodes.
- Author
-
Ou, Junke, Zou, Liang, Jin, Feng, Wu, Shugen, and Wang, Jiayi
- Subjects
- *
LITHIUM-ion batteries , *FILTER paper , *ANODES , *GRAPHITIZATION , *NITROGEN , *CARBON - Abstract
A hierarchically porous nitrogen, oxygen-rich carbon material is developed by Mg(NO 3) 2 treatment of filter paper in a one-step pyrolysis. The obtained carbons exhibit high specific surface area (1031 m2 g−1), interconnected micro-, meso-, and macroporous conductive network and attractive heteroatom contents (2.84 at.% nitrogen and 13.82 at.% oxygen). The as-prepared carbon tested as anode for lithium ion batteries displays an excellent reversible capacity (1560 mAh g−1 at 0.1 A g−1), superior rate capability (501 mAh g−1 at 5 A g−1) and desired cycling performance (1538 mAh g−1 at 0.1 A g−1 and 1105 mAh g−1 at 1 A g−1after 100 cycles). Moreover, a full battery with an as-obtained carbon anode and a LiFePO 4 cathode delivers a high discharge capacity of 165 mAh g−1 (the theoretical capacity of LiFePO 4 was 170 mAh g−1) and good cyclability (156 mAh g−1 after 20 cycles). Unlabelled Image • A hierarchically porous nitrogen, oxygen-rich carbon was fabricated in a one-step pyrolysis. • The as-obtained carbon delivers superior electrochemical performances for LIBs. • Mg(NO 3) 2 can not only acts as a pore-making agent, but also contributes to the heteroatom doping effects. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF