Water bamboo-derived porous carbons as electrode materials for supercapacitors
Water bamboo-derived porous carbons as electrode materials for supercapacitors
复制标题
茭白多孔碳作为超级电容器电极材料
DOI：
10.1039/c4nj01853b
复制
发表时间：
2015-01-01
影响因子：
3.3
通讯作者：
Wu, Qingsheng
中科院分区：
文献类型：
--
作者：
Li, Jiangfeng;Wu, Qingsheng
采用KOH预处理的部分炭化的水竹为原料，在800 ℃、N2气氛下炭化，制备了比表面积高达2352 m2 g-1的超级电容器用微孔炭材料。特别地，在KOH和预处理碳的2：1重量比下合成的碳材料表现出优异的性能，在6 M KOH电解质中在1A g（-1）的电流密度下具有268 F g（-1）的最大比电容，并且即使在10A g（-1）的电流密度下也保持高达222 F g（-1）。此外，该材料还显示出良好的容量保持率为97.28%，超过5000次循环，在10 A g（-1）的电流密度。高比表面积、丰富的孔容、合适的孔径分布和含氧基团是其优异的电化学性能的主要原因。
Microporous carbon materials with specific surface area as high as 2352 m(2) g(-1) were synthesized by the carbonization of KOH-pretreated partially carbonized water bamboo at 800 degrees C under a N-2 atmosphere for supercapacitor application. In particular, the carbon materials synthesized at a 2 : 1 weight ratio of KOH and pre-treated carbon exhibited excellent performance with a maximum specific capacitance of 268 F g(-1) at a current density of 1 A g(-1) in 6 M KOH electrolyte and retained up to 222 F g(-1) even at a current density of 10 A g(-1). In addition, this material also showed a good capacity retention of 97.28% over 5000 cycles at a current density of 10 A g(-1). The excellent electrochemical properties could be due to their high specific surface area, abundant pore volume, appropriate pore size distribution and some oxygen groups.