标题：High Performance Supercapacitors from Hierarchical Porous Carbon Aerogels Based on Sliced Bread
作者：Hao, Pin; Cui, Guanwei; Shi, Xifeng; Xie, Junfeng; Xia, Xinyuan; Sang, Yuanhua; Wong, C. P.; Liu, Hong; Tang, Bo
作者机构：[Hao, P] College of Chemistry, Chemical Engineering and Materials Science, Institute of Materials and Clean Energy, Collaborative Innovation Center of 更多
通讯作者地址：[Tang, B]Shandong Normal Univ, Coll Chem Chem Engn & Mat Sci,Minist Educ,Shandon, Inst Mat & Clean Energy,Key Lab Mol & Nano Probes, Collaborat Innova 更多
关键词：carbon aerogel;sliced bread;supercapacitor;energy density;cycling stability
摘要：Supercapacitor electrodes with porous structure based on renewable,eco-friendly and cost-effective materials have caused extensive concern in energy storage fields.Sliced bread,the common food ingredient,mainly containing glucose polymers,can be a promising candidate to fabricate porous supercapacitor electrodes.Highly porous carbon aerogels by using sliced bread as the raw material were synthesized through a carefully controlled aerogel carbonization-activation process.Interestingly,the specific surface area and the pore size distribution of the porous carbon were controlled by the activation temperature,which result in the varied performance of the carbon aerogel as a supercapacitor.Electrochemical investigation measurements revealed that the hierarchical porous carbon aerogel shows an excellent capacitor behavior for construction of a symmetric supercapacitor,which demonstrated a high specific capacitance of 229 F·g-1 at discharge current of 0.2 A·g-1.In addition,the fabricated supercapacitor displayed excellent capacitance retention of 95.5％ over 5000 cycles.