无粘结剂的柔性硫/碳纤维布电极的制备及电化学性能研究
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摘要:
以碳布为基底,通过浸渍法成功制备了柔性硫/碳纤维布电极.制备的柔性硫/碳纤维布电极无需添加导电剂和粘接剂,可直接用作硫正极极片组装电池,大大简化了电池制备工艺.电化学测试结果表明,硫含量为56.77%(质量分数)的硫/碳纤维布电极展现出了最好的电化学性能,即在0.1A/g电流密度下的可逆放电比容量达1 394mAh/g;充放电循环测试100次后,可逆放电容量仍然维持在733mAh/g.电化学性能的提高主要归因于碳纤维本身的导电性、柔韧性以及大量碳纤维相互交错互联的导电网络.
Sulfur/carbon-fiber cloth flexible electrodes was synthesized by a simple immersion process.The sulfur/carbon-fiber cloth flexible electrodes could be used pressed directly as cathode for lithium-sulfur battery without binder and conductive additive,thereby simplifying the manufacturing process.The sulfur/carbon-fiber cloth flexible electrode,which contained 56.77%sulfur in mass,showed good electrochemical performance.The discharge capacity of this electrode was as high as 1 394 mAh/g at 0.1 A/g.After 100 cycles at 0.1 A/g,the discharge capacity was still 733 mAh/g.This enhanced electrochemical performance could be attributed to the flexibility and conductivity of carbon fibers and the conductive matrix formed by carbon fibers.
作者:
袁光辉 金华峰 张永光
Yuan Guanghui;Jin Huafeng;Zhang Yongguang(Department of Chemistry and Chemical Engineering,Ankang University,Ankang 725000,China;Research Institute for Energy Equipment Materials;Tianjin Key Laboratory of Laminating Fabrication and Interface Control Technology for Advanced Materials,Hebei University of Technology,Tianjin 300130,China)
机构地区:
安康学院化学化工学院 河北工业大学能源装备材料技术研究院 天津市材料层状复合与界面控制技术重点实验室
出处:
《betway官方app 学报：自然科学版》 CAS 北大核心 2018年第3期60-67,共8页
基金:
国家自然科学基金(21406052) 陕西省教育厅自然科学基金(16JK1018) 人社部留学人员科技活动择优项目(CG2015003002) 安康学院高层次人才启动项目(2016AYQDZR05) 安康学院交叉融合项目(2017AYJC01).
关键词:
柔性硫/碳纤维布电极 无粘结剂 硫正极 电化学性能
flexible sulfur/carbon-fiber cloth electrode binder-free sulfur cathode electrochemical performance
分类号:
TM201.4 [一般工业技术—材料科学与工程]
