3D sponge-like nanoporous carbons via a facile synthesis for high-performance supercapacitors: direct carbonization of tartrate salt

作者：Luo, Heming^*; Yang, Yanfei; Zhao, Xia; Zhang, Jianqiang; Chen, Yanzheng

来源：Electrochimica Acta, 2015, 169: 13-21.

DOI：10.1016/j.electacta.2015.04.049

• 3D sponge-like nanoporous carbons
• Direct carbonization
• Supercapacitor
• High capacitance
• Tartrate salt

We report the direct synthesis of 3D sponge-like nanoporous carbons via carbonization of tartrate salt, including potassium tartrate and sodium tartrate, in inert atmosphere without any activation. The carbonization temperature is a very important parameter that ensures formation of the desired carbon structures and enhances their electrochemical performance in supercapacitors. Given that alkali metal is present in the selected carbon precursor, high-temperature activation causes reaming of carbon-K-800-1 to achieve a high specific surface area of 1018 m(2) g (1), thereby rendering the material suitable for use as an electrode for supercapacitors. All of the aqueous measurements were performed in a three-electrode system with 6 M KOH as the electrolyte. Carbon-K-800-1 can deliver a high specific capacitance of 296 F g (1) (29.1 mu F cm (2)) at a constant charge-discharge current of 0.7 A g (1); this capacitance may be maintained at 213 F g (1) (20.9 mu F cm (2)) at 20 A g (1). A long cycle stability of 95.1% capacitance retention was observed after 5000 charge-discharge cycles at a current density of 3 A g (1).

• 出版日期2015-7-1
• 单位兰州理工大学