摘要
硅纳米颗粒(SiNPs)加入到聚丙烯腈(PAN)/DMF溶液中混合均匀,通过静电纺丝、预氧化及碳化过程制备得到包含SiNPs的碳纤维膜(CNFs),然后经过HF酸处理形成自支撑空穴状硅碳纳米纤维膜(H-Si-CNFs),直接用作锂离子电池的阳极材料.通过SEM、TEM和XRD等对复合材料的形貌、结构和组成进行表征分析,并运用充放电测试仪对电池循环性能以及储能机理进行研究.结果表明这种H-Si-CNFs电极具有良好的循环性能,其中含10%硅粒子的H-Si-CNFs在100 mA·g-1充放电,首次可逆容量达到了607 mAh·g-1,经过40次循环后的容量保留率仍有92%.
A self-supporting silicon-containing hole carbon nanofiber membrane（ H-Si-CNFs）was obtained by elec-trospinning a polyacrylonitrile（ PAN）/DMF solution containing silica nanoparticles（ SiNPs）,followed by pre-oxida-tion,carbonization and HF-treating processing. The H-Si-CNFs are directly used as anode materials for making lithi-um ion batteries. SEM,TEM and XRD are used to observe and characterize the morphology,structure and composi-tion of the H-Si-CNF composite materials. The energy storage mechanism and cycle performance of the as-prepared H-Si-CNF-based Li ion battery is studied by using charge/discharge tester. The results show that the 10% silicon-containing H-Si-CNFs electrode has an excellent cycle performance at 100 mA·g-1 charging/discharging,the ini-tial reversible capacity of 607 mAh·g-1 and a capacity retention rate of 92% after 40 cycles.
出处
《江西师范大学学报（自然科学版）》
CAS
北大核心
2014年第3期290-294,共5页
Journal of Jiangxi Normal University(Natural Science Edition)
基金
国家自然科学基金(21174058)资助项目
关键词
锂离子电池
阳极
硅碳材料
静电纺丝
空穴结构
lithium-ion battery
anode
silicon carbide
electrospinning
hole structure
