涂碳铝箔在锂硫电池中的应用

发布时间：2018-01-07 17:37

本文关键词：涂碳铝箔在锂硫电池中的应用　出处：《中国有色金属学报》2017年04期 　论文类型：期刊论文

【摘要】：利用导电炭黑和导电石墨两款碳材料制作涂碳铝箔,将其作为锂硫电池正极的集流体,考察箔材种类对电极性质和电池性能的影响规律。结果表明:所制作的涂碳铝箔具有"点-面"结合的导电架构,其不仅可以改善硫电极的导电性,而且有利于增强活性物质与集流体的粘结性、抑制电解液对铝箔的腐蚀。涂碳铝箔可以显著降低电池的极化阻抗,维持稳定的充放电平台。相比使用传统铝箔,使用涂碳铝箔的电池的活性物质利用率更高,循环性能更为优异,经0.2C充放电循环40次后,其放电容量达到602 F/g,容量保持率为77.7%。
[Abstract]:The use of conductive carbon black and conductive graphite two carbon materials production of carbon coated aluminum foil, as the fluid in the positive electrode of lithium sulfur batteries, influence of foil type on electrode properties and battery performance study. The results showed that the conductive carbon coated aluminum foil produced with "point to surface" of the structure, the electric conductivity not only can improve the sulfur electrode, but also conducive to enhancing the adhesion of the active material and the current collector, inhibit the corrosion of electrolyte on carbon coated aluminum foil. Aluminum foil can significantly reduce the polarization resistance of the battery charge and discharge, maintain the stability of the platform. Compared with traditional activated carbon coated aluminum foil, aluminum foil material using the battery utilization rate is high, the cycle performance is more excellent, 0.2C after 40 charge discharge cycles, the discharge capacity reached 602 F/g, the capacity retention rate is 77.7%.

【作者单位】：中南大学冶金与环境学院;深圳好电科技有限公司;
【基金】：国家自然科学基金资助项目(51474243) 深圳市战略性新兴产业发展专项资金(JCYJ20120618164543322)~~
【分类号】：TM912
【正文快照】： 当前,锂离子电池已成为手机、电脑等移动式电子设备的首选电源,并且在电动汽车、可再生能源利用以及智能电网等新兴领域具有广阔的应用前景。但是,受电极材料比容量的限制[1],商品化锂离子电池仍未能突破250 W·h/kg的能量密度瓶颈,难以满足高能量密度的使用需求。而单质硫比

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