Authors: Fei Sun Haobin Wu Xin Liu Fang Liu Huihui Zhou Jihui Gao Yunfeng Lu
Publish Date: 2016/08/01
Volume: 9, Issue: 11, Pages: 3209-3221
Abstract
Supercapacitors have high power densities high efficiencies and long cycling lifetimes however to enable their wider use their energy densities must be significantly improved The design and synthesis of improved carbon materials with better capacitance rate performance and cycling stability has emerged as the main theme of supercapacitor research Herein we report a facile synthetic method to prepare nitrogenrich carbon particles based on a continuous aerosolspraying process The method yields particles that have high surface areas a uniform microporous structure and are highly Ndoped resulting in a synergism that enables the construction of supercapacitors with high energy and power density for use in both aqueous and commercial organic electrolytes Furthermore we have used density functional theory calculations to show that the improved performance is due to the enhanced wettability and ion adsorption interactions at the carbon/electrolyte interface that result from nitrogen doping These findings provide new insights into the role of heteroatom doping in the capacitance enhancement of carbon materials in addition our method offers an efficient route for largescale production of doped carbon
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