期刊
ENERGY & FUELS
卷 36, 期 4, 页码 2268-2276出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.energyfuels.2c00073
关键词
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资金
- Heilongjiang Provincial Key Laboratory of Surface Active Agent [BMHXJKF002]
- National Natural Science Foundation of China [52072191]
- Heilongjiang Provincial Natural Science Foundation of China [LH2020E126]
- Research and Development Project of Basic Research Business Fees of Provincial Higher Education Institutions in Heilongjiang Province in 2018 (Special Subject of Plant Food Processing Technology) [YSTSXK201870]
- Fundamental Scientific Research Business Expenses Research Project of Provincial Colleges and Universities of Heilongjiang Province [135509205]
- Graduate Innovative Research Project of Qiqihar University [YJSCX2020003]
By preparing carbon microspheres from waste biomass corn stalks and inserting them into composite hydrogels, the restacking of graphene sheets was effectively inhibited, resulting in high-performance electrode materials with excellent electrochemical performance. This work is of great significance for the high value-added conversion of waste biomass and the preparation of supercapacitors.
Herein, carbon microspheres (CSs) of relatively uniform size from waste biomass corn stalks without carbonization or activation were first inserted as spacers to inhibit the restacking of graphene sheets in carbon microsphere/reduced graphene oxide composite hydrogels (CS/rGOs). The prepared composite hydro-gels were applied as electrode materials for supercapacitors and exhibited excellent electrochemical performance due to their abundant oxygen-containing functional groups and good hydrophilicity. Notably, the CS/rGO-3 sample-based symmetric supercapacitors showed an excellent specific capacitance (281.5 F g(-1) at 0.3 A g(-1)), a good rate performance (81.87%), and an eminent capacitance retention rate (102.2% after 10,000 cycles at 10 A g(-1)). Considering the commercial value of corn stalks and their role in the field of carbon neutralization at the same time, this work affords a new strategy for the high value-added conversion of waste biomass and the preparation of high-performance supercapacitor electrode materials.
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