期刊
IONICS
卷 26, 期 8, 页码 4141-4151出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-020-03556-y
关键词
Multi-heteroatom-doped carbon materials; Ag-nanoparticle-decorated carbon material; Solid-state symmetric supercapacitor; Superior long-term cycling stability; Great energy density
资金
- National Natural Science Foundation of China [51972049, 51672040, 51672013]
In order to fabricate high-performance supercapacitors with desirable energy density and excellent cycling stability, this work aimed to synthesize biomass-derived carbon materials with great electrochemical performance, especially with superior long-term cycling stability, via a facile and simple process. Herein, we have fabricated three kinds of biomass-derived multi-heteroatom-doped carbon materials, using laver, soybean milk and soybean milk (Ag+) as the precursors, labeled as LC, SC and Ag-SC, respectively. The three heteroatom-doped carbon materials possessed extremely high cycling performance; after cycling for 50,000 times, the specific capacitances of LC and SC could maintain 119.8% and 96.0%, and the specific capacitance of Ag-SC could maintain 131.1% after cycling for 40,000 times. Additionally, the energy densities of the corresponding solid-state symmetric supercapacitors were 9.5, 6.2 and 6.9 Wh kg(-1) at the power density of about 900 W kg(-1), respectively, and the specific capacitances could retain 141.5%, 128.9% and 102.2% after 50,000 cycles.
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