文献类型：期刊文献

英文题名：Improved supercapacitor performance of α-starch-derived porous carbon through gelatinization

作者：Zhao, Chunhua[1];Wang, Yixuan[1];Zheng, Jiexin[1];Xu, Sijia[1];Rui, Pengfei[1];Zhao, Chongjun[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Shanghai Key Lab Adv Polymer Mat,Minist Educ, Shanghai 200237, Peoples R China

年份：2022

卷号：521

外文期刊名：JOURNAL OF POWER SOURCES

收录：;EI(收录号：20220111423732);WOS:【SCI-EXPANDED(收录号:WOS:000742850100003)】；

基金：We are very grateful for the support of the study by the We are grateful for the support of National Natural Science Foundation of China (22075082) , Natural Science Foundation of Shanghai (No. 19ZR1413000, 13ZR1411900) , Shanghai Alliance Plan (No.LM201751, No. LM201881) , the Shanghai Leading Academic Discipline Project (B502) , the Shanghai Key Laboratory Project (08DZ2230500) .

语种：英文

外文关键词：Gelatinization; alpha-Starch; Activated carbon; Supercapacitor; EtOH/H2O

摘要：Electric double layer capacitors (EDLC), as the energy storage devices, are generally based on those electrode materials of activated carbon, and biomass are becoming the main source of activated carbon in large scale. However, biomass-derived activated carbon has the disadvantage of low specific surface area (S-BET) due to its big constructing blocks. Herein, gelatinized starch (alpha-starch) instead of untreated starch is chosen as carbon source, and interconnected porous activated carbon is obtained by tuning the EtOH/H2O content of gelatinization solution. Due to its high specific surface area up to 1863 m(2) g(-1), the gelatinized starch-derived activated carbon (SAC) exhibits an improved specific capacitance 335.6 F g(-1) at 0.5 A g(-1) (305.33 F g(-1) at 1A g(-1) vs. 103 F g(-1) for untreated starch), which also delivers and 245.85 F g(-1) at 10 A g(-1) and keeps 96% retention of its initial capacitance even after 20, 000 cycles.