玉米芯
超级电容器
纤维素
半纤维素
碳化
比表面积
多孔性
木质素
生物量(生态学)
碳纤维
化学工程
材料科学
复合材料
化学
电容
有机化学
复合数
电极
原材料
催化作用
农学
生物
物理化学
扫描电子显微镜
工程类
作者
Jingui Ai,Shuhua Yang,Yana Sun,Mei Liu,Le Zhang,Degang Zhao,Jieqiang Wang,Chao Yang,Xiutong Wang,Bingqiang Cao
标识
DOI:10.1016/j.jpowsour.2020.229221
摘要
Cellulose texture in biomass is a desired renewable carbon source to prepare activated carbon with abundant porous structure and high specific surface area. However, the cellulose fractionation/separation from biomass is still a challenge. Here, corncob cellulose-derived hierarchical porous carbon has been fabricated successfully via a facile mechanical fragmentation and sieving pretreatment with subsequent carbonization and activation. The microstructural analyses show that the morphologies and textures of the corncob-derived carbon are highly depended on the corncob basic components such as cellulose, hemicellulose and lignin. Among the corncob-derived carbons, the corncob cellulose-derived hierarchical porous carbon (CPA-35-150) exhibits the largest specific surface area (1940.6 m2 g−1) and decent pore size distribution. Consequently, the high specific capacitance of 208.5 F g−1 at 1 A g−1 and outstanding rate capability are realized. Also, CPA-35-150 shows good cycling stability with 97.2% capacitance retention after 20,000 cycles under 10 A g−1.
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