Journal
ENERGY STORAGE MATERIALS
Volume 23, Issue -, Pages 46-54Publisher
ELSEVIER
DOI: 10.1016/j.ensm.2019.05.037
Keywords
Potassium-ion battery; Nitrogen and oxygen dual-doped; Carbon network; Anode
Funding
- National Science Foundation of China [51671135]
- Program of Shanghai Subject Chief Scientist [17XD1403000]
- Shanghai Outstanding Academic Leaders Plan
- Innovation Program of Shanghai Municipal Education Commission [2019-01-07-00-07-E00015]
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Nitrogen and oxygen dual-doped amorphous carbon network (NOCN) facilely prepared via self-assembly method in this study as potassium ion battery' anode for ultra-long and superior-rate capability. The as-synthesized NOCN exhibits an excellent reversible capacity of 464.9 mAh g(-1) at 0.05 A g(-1), outstanding performance of 175 mAh g(-1) at a high current density of 5.0 A g(-1), and ultra-long cycling performance with capacity decay less than 0.008% per cycle. The superior performance can be attributed to the unique ultra-stable network structure together with N and O co-doped. Supported by detailed fundamental analysis, the higher K-ion storage process in NOCN is contributed by the pseudocapacitive mechanism. The simple synthesis route as well as the hopeful electro-chemical property shed a new insight into the quest for carbon-based K-storage anode materials with high energy and long-cycling life.
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