文献类型：期刊文献

英文题名：Dual Tuning of Biomass-Derived Hierarchical Carbon Nanostructures for Supercapacitors: the Role of Balanced Meso/Microporosity and Graphene

作者：Zhu, Zhengju[1];Jiang, Hao[1];Guo, Shaojun[2];Cheng, Qilin[1];Hu, Yanjie[1];Li, Chunzhong[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[2]Peking Univ, Dept Mat Sci & Engn, Coll Engn, Beijing 100871, Peoples R China

年份：2015

卷号：5

外文期刊名：SCIENTIFIC REPORTS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000363756600001)】；

基金：This work was supported by the National Natural Science Foundation of China (21206043, 21236003, 21371057, 21322607), Program for New Century Excellent Talents in University (NCET-13-0796), the Basic Research Program of Shanghai (13JC1401901, 13NM1400801), the 111 Project (B14018) and Fundamental Research Funds for the Central Universities.

语种：英文

摘要：Rational design of advanced carbon nanomaterials with a balanced mesoporosity to microporosity is highly desirable for achieving high energy/power density for supercapacitors because the mesopore can allow better transport pathways for the solvated ions of larger than 1 nm. Inspired by the inherent meso/macroporous architecture and huge absorption ability to aqueous solution of auricularia biomass, we demonstrate a new biomass-derived synthesis process for the three-dimensional (3D) few-layered graphene nanosheets incorporated hierarchical porous carbon (GHPC) nanohybrids. The as-prepared GHPC nanohybrids possess a balanced mesoporosity to microporosity with much improved conductivity, which is highly desirable for achieving high energy/power density for supercapacitors. As we predicted, they delivered a high specific capacitance of 256 F g(-1) at 1 A g(-1) with excellent rate capability (120 F g(-1) at 50 A g(-1)) and long cycle life (92% capacity retention after 10000 cycles) for symmetric supercapacitors in 1 M H2SO4. Based on the as-obtained carbon materials, a flexible and all-solid-state supercapacitor was also assembled, which can be fully recharged within 10 s and able to light an LED even under bended state. Such excellent performance is at least comparable to the best reports in the literature for two-electrode configuration under aqueous systems.