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首页> 外文期刊>ACS Sustainable Chemistry & Engineering >Conversion of Biomass Waste into High Performance Supercapacitor Electrodes for Real-Time Supercapacitor Applications
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Conversion of Biomass Waste into High Performance Supercapacitor Electrodes for Real-Time Supercapacitor Applications

机译：将生物质废物转化为高性能超级电容器，用于实时超级电容器应用

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摘要

Sustainable conversion of biomass waste into an economic and high performance electrical energy storage device receives excellent scientific and technological interest. The high manufacturing cost and low energy density are the major obstacles for supercapacitor developers. To overcome these obstacles, the present study delineates the fabrication of higher energy density, faster charging, and excellent durable supercapacitor electrodes derived from industrial waste cotton used as a sustainable and economic carbon resource. The obtained supercapacitor electrode exhibits excellent volumetric capacitance of 87 F cm(-3) at 1 A g(-1), and it delivers higher volumetric energy density of 30.94 W h L-1 owing to the simultaneous achievement of high loading of active mass (9 mg cm(-2)) and maximum voltage window of 3.2 V. Besides, the supercapacitor electrodes showed an excellent durability up to 15000 charge-discharge cycles at 4 A g(-1) even at higher voltage of 3.2 V. It can be ascribed that a large electrolyte ion accessible surface area (1893 m(2) g(-1)) with an interconnected porous network of activated carbon fibers can enhance the rapid electrolyte ion transport even at high current load. Very interestingly, good capacitance retention at high current with high voltage clearly demonstrates the presence of the optimum pore size of the carbon electrode which can match with the electrolyte ion size for rapid capacitive response. Furthermore, integration of a solar powered supercapacitor as a self-powering energy harvest and energy storage device is designed, and it powers the commercial solar lantern. This work provides a simple and feasible synthetic strategy of converting sustainable biomass waste into economic and high performance supercapacitor electrodes for real-time supercapacitor applications.
机译：生物质废物的可持续转化为经济高性能的电能存储装置，得到了优异的科学和技术兴趣。高制造成本和低能量密度是超级电容器开发商的主要障碍。为了克服这些障碍，本研究描绘了较高能量密度，更快的充电和衍生自用于可持续和经济碳资源的工业废棉的优质耐用超级电容电极的制造。所获得的超级电容器电极在1Ag（-1）下表现出87f cm（-3）的优异的容积电容，由于同时成就高负荷的活性物质，它提供了30.94 W H L-1的容量能量密度。 （9mg cm（-2））和3.2 V的最大电压窗。此外，即使在3.2V的较高电压下，超级电容器电极也显示出高达15000个电荷放电循环的优异耐用性。它可以归因于具有互连的活性炭纤维的相互连接的多孔网络的大电解质离子可接近表面积（1893m（2）G（-1））即使在高电流负载下也可以增强快速电解质离子输送。非常有趣的是，高电压高电流的良好电容保持清楚地证明了可以与电解质离子尺寸相匹配的碳电极的最佳孔径的存在。此外，设计了太阳能超级电容器作为自动能量收获和储能装置的集成，并且它为商业太阳能灯具供电。这项工作提供了一种简单而可行的合成策略，可将可持续生物量垃圾转化为经济高性能超级电容器，用于实时超级电容器应用。

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