High Performance Supercapacitors from Hierarchical Porous Carbon Aerogels Based on Sliced Bread

Chinese Journal of Chemistry - Tập 35 Số 5 - Trang 699-706 - 2017
Pin Hao1, Guanwei Cui1, Xifeng Shi1, Junfeng Xie1, Xinyuan Xia1, Yuanhua Sang2, C.P. Wong3, Hong Liu2, Bo Tang1
1College of Chemistry, Chemical Engineering and Materials Science, Institute of Materials and Clean Energy, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan, Shandong 250014, China
2State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong 250100, China
3School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30032, The United States

Tóm tắt

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.

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Thông tin
Thông tin xuất bản

Chinese Journal of Chemistry

Tập 35 Số 5

699-706

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