期刊
ADVANCED ENERGY MATERIALS
卷 2, 期 4, 页码 431-437出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201100548
关键词
nitrogen-rich carbon; supercapacitors; eggshells; biomass waste; energy storage
类别
资金
- NINT NRC
- NRCan ecoENERGY Innovation Initiative
Supercapacitor electrode materials are synthesized by carbonizing a common livestock biowaste in the form of chicken eggshell membranes. The carbonized eggshell membrane (CESM) is a three-dimensional macroporous carbon film composed of interwoven connected carbon fibers containing around 10 wt% oxygen and 8 wt% nitrogen. Despite a relatively low surface area of 221 m2 g-1, exceptional specific capacitances of 297 F g-1 and 284 F g-1 are achieved in basic and acidic electrolytes, respectively, in a 3-electrode system. Furthermore, the electrodes demonstrate excellent cycling stability: only 3% capacitance fading is observed after 10 000 cycles at a current density of 4 A g-1. These very attractive electrochemical properties are discussed in the context of the unique structure and chemistry of the material.
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