期刊
ACS APPLIED ENERGY MATERIALS
卷 1, 期 4, 页码 1703-1707出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.8b00182
关键词
potassium-ion battery; cup-stacked carbon nanotube; nitrogen doping; free-standing electrode; energy storage
资金
- National Natural Science Foundation of China [51672188]
- Natural Science Foundation of Tianjin City [16JCYBJC40900]
- Thousand Talents Plan for Young Professionals of China
Free-standing nitrogen-doped cup-stacked carbon nanotube (NCSCNT) mats were synthesized and tested as anodes for potassium-ion batteries (KIBs). The edge-open structure character of the NCSCNTs allows a facile insertion of K+ ions into the carbon nanotubes. Combined with the nanosized feature and interconnected flexible structure, the NCSCNTs demonstrate impressive electrochemical performance with a reversible capacity of 323 mA h/g and a markedly improved rate capability retaining 75 mA h/g even at 1000 mA/g. Additionally, the free-standing NCSCNT mat electrodes eliminate conductive agents during the battery assembly and thereby significantly the utilization enhance the of nonactive components of binders and total specific capacity of the electrodes.
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