Wet-spinning assembly of nitrogen-doped graphene film for stable graphene-polyaniline supercapacitor electrodes with hig
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Published online 22 May 2019 | https://doi.org/10.1007/s40843-019-9436-1
Wet-spinning assembly of nitrogen-doped graphene film for stable graphene-polyaniline supercapacitor electrodes with high mass loading *
Xingyuan Chu, Tieqi Huang , Yueqi Hu, Ruilin Dong, Jingyang Luo, Shengying Cai, Weiwei Gao, * Zhen Xu and Chao Gao ABSTRACT Graphene-polyaniline (GP) composites are promising electrode materials for supercapacitors but possessing unsatisfied stability, especially under high mass loading, due to the low ion transmission efficiency and serious pulverization effect. To address this issue, we propose a scalable method to achieve highly wettable GP electrodes, showing excellent stability. In addition, our results demonstrate that the performance of electrodes is nearly independent of the mass loading, indicating the great potential of such GP electrodes for practical devices. We attribute the remarkable performance of GP to the delicate precursor of nitrogen doped graphene film assembled by wet-spinning technology. This report provides a strategy to promote the ion penetrating efficiency across the electrodes and deter the pulverization effect, aiming at the practical GP supercapacitor electrodes of high mass loading. Keywords: supercapacitor, graphene, polyaniline, nitrogen doping, stability, mass loading
INTRODUCTION Supercapacitors (SCs) are known for their high power density to satisfy the requirements of specific fields such as heavy-duty applications and electric vehicles (EVs) [1]. Carbon based materials, especially graphene based materials, arrest great attention due to their high conductivity, high specific surface area (SSA) and stability [2]. Unfortunately, graphene electrodes normally suffer −1 from low capacitance (< 250 F g in most literatures) [3], −1 resulting in poor energy storage (
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