Ultrahigh volumetric capacitance and cyclic stability of fluorine and nitrogen co-doped carbon microspheres

Junshuang Zhou, Jie Lian, Li Hou, Junchuan Zhang, Huiyang Gou, Meirong Xia, Yufeng Zhao, Timothy A. Strobel, Lu Tao and Faming Gao ()
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Junshuang Zhou: Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University
Jie Lian: Aerospace, and Nuclear Engineering, Rensselaer Polytechnic Institute
Li Hou: Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University
Junchuan Zhang: Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University
Huiyang Gou: Geophysical Laboratory, Carnegie Institution of Washington
Meirong Xia: Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University
Yufeng Zhao: Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University
Timothy A. Strobel: Geophysical Laboratory, Carnegie Institution of Washington
Lu Tao: Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University
Faming Gao: Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University

Nature Communications, 2015, vol. 6, issue 1, 1-8

Abstract: Abstract Highly porous nanostructures with large surface areas are typically employed for electrical double-layer capacitors to improve gravimetric energy storage capacity; however, high surface area carbon-based electrodes result in poor volumetric capacitance because of the low packing density of porous materials. Here, we demonstrate ultrahigh volumetric capacitance of 521 F cm−3 in aqueous electrolytes for non-porous carbon microsphere electrodes co-doped with fluorine and nitrogen synthesized by low-temperature solvothermal route, rivaling expensive RuO2 or MnO2 pseudo-capacitors. The new electrodes also exhibit excellent cyclic stability without capacitance loss after 10,000 cycles in both acidic and basic electrolytes at a high charge current of 5 A g−1. This work provides a new approach for designing high-performance electrodes with exceptional volumetric capacitance with high mass loadings and charge rates for long-lived electrochemical energy storage systems.

Date: 2015
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DOI: 10.1038/ncomms9503

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