【摘 要】
：
Self-discharge is a significant issue in electric double layer energy storage,which leads to a rapid voltage drop and low energy efficiency.Here,we attempt to solve this problem by changing the structure of the electric double layer into a de-solvated sta
【机 构】
：
Key Laboratory for Anisotropy and Texture of Materials, Northeastern University, Shenyang 110819, Li
论文部分内容阅读
Self-discharge is a significant issue in electric double layer energy storage,which leads to a rapid voltage drop and low energy efficiency.Here,we attempt to solve this problem by changing the structure of the electric double layer into a de-solvated state,by constructing a nano-scale and ion-conductive solid electrolyte layer on the surface of a carbon electrode.The ion concentration gradient and potential field that drive the self-discharge are greatly restricted inside this electric double layer.Based on this understanding,a high-efficiency graphene-based lithium ion capacitor was built up,in which the self-discharge rate is reduced by 50％ and the energy efficiency is doubled.The capacitor also has a high energy density,high power output and long life,and shows promise for practical applications.
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