A Flexible and Ultrahigh Energy Density Capacitor via Enhancing Surface/Interface of Carbon Cloth Supported Colloids,Advanced Energy Materials

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A Flexible and Ultrahigh Energy Density Capacitor via Enhancing Surface/Interface of Carbon Cloth Supported Colloids
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2018-03-12 , DOI: 10.1002/aenm.201703329
Xitong Liang _{1,

2} , Kunfeng Chen ₁ , Dongfeng Xue ₁

Affiliation

Pseudocapacitors are now reaching the energy density limits set by the surface redox reaction of their electrode materials, requiring new cation paradigms for a fast cation Faradaic reaction with high capacitance. In this work, a flexible and ultrahigh energy density capacitor is reported via enhancing surface/interface of active colloids and supported carbon cloth. A flexible asymmetrical capacitor assembled with Ni²⁺ colloidal cathode and Fe³⁺ colloidal anode displays a high energy density of 353 W h kg⁻¹ at the power density of 2250 W kg⁻¹, outperforming recent reported pseudocapacitors, and shows superior cycling stability after 10 000 charge–discharge cycles at current density of 30 A g⁻¹. This work demonstrates that the optimized surface/interface of carbon cloth and colloids can lead to the enhancement of both stability and activity of colloidal electrode.

中文翻译：

通过增强碳布支持的胶体的表面/界面的柔性和超高能量密度电容器

伪电容器目前正达到其电极材料的表面氧化还原反应所设定的能量密度极限，因此需要新的阳离子范式来实现具有高电容的快速阳离子法拉第反应。在这项工作中，通过增强活性胶体和支撑碳布的表面/界面，报道了一种柔性且超高能量密度的电容器。由Ni ²⁺胶体阴极和Fe ³⁺胶体阳极组装而成的柔性不对称电容器在2250 W kg ^-1的功率密度下显示出353 W h kg ^-1的高能量密度，优于最近报道的伪电容器，并显示出优异的循环稳定性10000次充放电循环后，电流密度为30 A g ^-1。这项工作表明，优化的碳布和胶体的表面/界面可以提高胶体电极的稳定性和活性。

更新日期：2018-03-12

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