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A Chemical Blowing Strategy to Fabricate Biomass‐Derived Carbon‐Aerogels with Graphene‐Like Nanosheet Structures for High‐Performance Supercapacitors
Author(s) -
Zhang Hai,
Zhang Ze,
Luo JinDi,
Qi XingTao,
Yu Ji,
Cai JianXin,
Wei Junchao,
Yang ZhenYu
Publication year - 2019
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201900267
Subject(s) - supercapacitor , graphene , materials science , nanosheet , carbon fibers , nanotechnology , chemical engineering , electrolyte , energy storage , biomass (ecology) , electrochemistry , electrode , composite material , chemistry , composite number , power (physics) , physics , oceanography , quantum mechanics , geology , engineering
The efficient exploitation and utilization of low‐cost and biomass‐derived carbon materials will play an active role in developing sustainable energy storage systems. However, the difficult morphology control and incomplete activation limits their pervasive application in electrochemical energy storage. Inspired by the famous Chinese folk handicraft of sugar‐figure blowing, biomass‐derived carbon aerogels (GCA) with 2 D graphene‐like thin nanosheets were fabricated by a simple chemical blowing strategy from a viscous agaric solution obtained through hydrothermal treatment of agaric. A chemical blowing agent (NH 4 Cl) was used to effectively exfoliate the bulk biomass‐derived carbon flake into 2 D graphene‐like nanosheets, which resulted in a highly porous structure and high specific area (2200 m 2 g −1 ) after the activation process. As a result, a high specific capacitance of 340 F g −1 at 3 A g −1 and a high specific energy of 25.5 Wh kg −1 at a power density of 2 kW kg −1 was obtained for the GCA electrode, which can be attributed to the abundant electrochemically active surfaces, short ion transport paths, and effective electrolyte infiltration.. This work demonstrates an effective and low‐cost strategy to prepare hierarchical and well‐organized porous biomass carbon materials with graphene‐like nanosheets for high‐performance supercapacitors.