化工进展2017，Vol.36Issue(12)：4540-4546,7.DOI:10.16085/j.issn.1000-6613.2017-0585
硅碳复合电极材料制备及储锂性能
Preparation and lithium storage properties of Si/C composite electrodes
摘要
Abstract
Activated graphene nanoplates(a-GNPs)were prepared by using the hydrothermal method with the activating agent of ZnCl2,and the influences of different process parameters on the pore structure of a-GNPs were also investigated. Si nanoparticles coated with the conductive polyaniline(PANI) were mixed with suitable amounts of a-GNPs. After the subsequent pyrolysis,the Si/p-PANI/a-GNPs composites were obtained,which could be used as the negative electrode material of Li-ion batteries. The pore structure of a-GNPs was characterized by TEM,the variation of covalent bonds of PANI before and after pyrolysis was analyzed by FTIR,and the structure and morphology of the Si/p-PANI/a-GNPs electrode were observed by SEM. The electrochemical performance of as-prepared Si/C composite electrode was tested by electrochemical methods such as cyclic voltammetry,electrochemical impedance spectrum and galvanostatic charge-discharge. The results indicated that the lithium storage capacity and stability of Si/p-PANI/a-GNPs electrode were significantly improved compared with that of pure Si and Si/p-PANI electrodes. The reversible specific capacity of the Si/p-PANI/a-GNPs electrode prepared at optimized conditions reached 1093.4mA·h/g after 50 charge/discharge cycles,which increased by 415.3% and 112% compared to that of Si electrode and Si/p-PANI electrode,respectively. This was primarily due to the contribution of a-GNPs to the improvements in electrolyte transmission and conductivity.关键词
电化学/硅碳复合材料/纳米材料/活化石墨烯/稳定性Key words
electrochemistry/Si/C composites/nanomaterial/activated graphene/stability分类
信息技术与安全科学引用本文复制引用
夏楠,刘园园,马焕梅,田建华..硅碳复合电极材料制备及储锂性能[J].化工进展,2017,36(12):4540-4546,7.基金项目
国家重点研发计划项目(2016YFB0100511). （2016YFB0100511）
