期刊
NANO ENERGY
卷 27, 期 -, 页码 482-491出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2016.07.034
关键词
Chitin microspheres; Carbon nanofiber framework; Nitrogen doped carbon; Elastic carbon microspheres; High rate supercapacitor
类别
资金
- Major Program of National Natural Science Foundation of China [21334005]
- National Natural Science Foundation of China [20874079]
Chitin derived from discarded seafood waste (crab and shrimp shell) is a naturally abundant resource, but its difficult dissolubility limits the processing and applications. Herein, we prepared nanofibrous microspheres by using chitin solution dissolved in NaOH/urea aqueous solvent at low temperature, and subsequently fabricated the novel elastic nitrogen-doped carbon microspheres by pyrolyzing the chitin microspheres. Interestingly, the carbon microspheres were consisted of robust cross-linked nanofibers and displayed interconnected nanofibrous framework architecture, named as CNFF. The CNFF micro spheres showed unique elasticity, excellent compression behaviors, and the morphology recovered completely over 5 cyclic compression at strain 75%. Moreover, the carbon microspheres exhibited an outstanding rate capability with a capacitance retention of similar to 50% when increase the scan rate from 5 mV/s to 10,000 mV/s as well as good cycling stability for supercapacitor applications, as a result of their hierarchical porosity, stable 3D interconnected mesh structure and ultrahigh specific surface area (over 1000 m(2)/g). Particularly, in the organic electrolyte, the highest deliverable energy density reached up to 58.7 Wh/kg. This work opened up a completely new and green avenue for constructing high performance carbon-based material with elasticity from biomass waste, showing promising application in the energy storage field. (C) 2016 Elsevier Ltd. All rights reserved.
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