摘要
锂硫电池由于具有1675 mAh·g-1的高理论比容量和2600 Wh·kg-1的高理论能量密度,被看做是下一代最有前景的二次电池能源储存系统之一。但是,多硫化物的穿梭效应、活性物质导电性差以及充放电过程中的体积膨胀效应等问题阻碍了其进一步商业化。为了解决这些问题,不同的材料被引入和硫进行复合。在所有材料的选择中,碳材料由于具有高的表面积、优异的导电性、化学稳定性和低成本等优势在锂硫电池正极中得到了广泛应用。本文总结了几种不同的碳材料在硫/碳复合正极中的发展历程,讨论了碳材料的结构、孔径大小以及表面功能化对锂硫电池电化学性能的影响,并对其前景以及发展趋势作了预测。
Lithium-sulfur batteries are regarded as one of the most promising secondary battery energy storage systems for the next generation due to the high theoretical specific capacity of 1675 mAh·g-1 and theoretical energy density of 2600 Wh·kg-1.However,the shuttle effects of polysulfides,the poor conductivity of active materials,and the volume expansion effect during charging and discharging hindered its further commercialization.To solve above mentioned problems,different materials are introduced to integration with sulfur.Among all the choices of materials,carbon materials have been widely used in cathodes of lithium-sulfur batteries due to the advantages of high surface area,excellent conductivity,chemical stability,and low cost.In this review,the development of several different carbon materials in sulfur/carbon composite cathodes was summarized,the effect of material structure,pore size and surface functionalization of carbon on the electrochemical performance of lithium-sulfur batteries were discussed.And its prospects and development trends were also predicted.
作者
吴旭
唐晓宁
WU Xu;TANG Xiaoning(School of Materials and Metallurgy,Guizhou University,Guiyang 550025,China)
出处
《人工晶体学报》
EI
CAS
北大核心
2020年第9期1752-1763,共12页
Journal of Synthetic Crystals
基金
贵州大学培育项目(黔科合平台人才[2017]5788)。
关键词
锂硫电池
碳材料
能量密度
穿梭效应
电化学性能
lithium-sulfur battery
carbon material
energy density
shuttle effect
electrochemical performance
