材料科学
阳极
碳纤维
杂原子
电化学
化学工程
纳米材料
纳米技术
氮气
电极
复合数
复合材料
化学
有机化学
工程类
物理化学
戒指(化学)
作者
Ying Zhang,Jie Tao,Chenglin Zhang,Huaping Zhao,Yong Lei
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2022-05-03
卷期号:33 (29): 295403-295403
被引量:1
标识
DOI:10.1088/1361-6528/ac6527
摘要
Carbon nanomaterials have become a promising anode material for potassium-ion batteries (KIBs) due to their abundant resources, low cost, and excellent conductivity. However, among carbon materials, the sluggish reaction kinetics and inferior cycle life severely restrict their commercial development as KIBs anodes. It is still a huge challenge to develop carbon materials with various structural advantages and ideal electrochemical properties. Therefore, it is imperative to find a carbon material with heteroatom doping and suitable nanostructure to achieve excellent electrochemical performance. Benefiting from a Na2SO4template-assisted method and KOH activation process, the KOH activated nitrogen and oxygen co-doped tubular carbon (KNOCTC) material with a porous structure exhibits an impressive reversible capacity of 343 mAh g-1at 50 mA g-1and an improved cyclability of 137 mAh g-1at 2 A g-1after 3000 cycles with almost no capacity decay. The kinetic analysis indicates that the storage mechanism in KNOCTC is attributed to the pseudocapacitive process during cycling. Furthermore, the new synthesis route of KNOCTC provides a new opportunity to explore carbon-based potassium storage anode materials with high capacity and cycling performance.
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