硅酸盐学报Issue(8)：1046-1050,5.DOI:10.7521/j.issn.0454-5648.2013.08.04
镁热还原法制备多孔硅碳复合负极材料
Preparation of Porous Si/C Anode Materials by Magnesiothermic Reduction Method
摘要
Abstract
Porous Si/C composite as anode materials were fabricated through magnesiothermic reduction of mesoporous silica (SBA-15 and MCM-48) and diatomite and subsequent impregnating of carbon precursor into the mesoporous Si followed by carboni-zation. The structure and morphology of the porous composite were characterized by X-ray diffraction, Raman spectroscopy, field emission scanning electron microscope and nitrogen absorption and desorption. Electrochemical performance of the porous composite electrodes was investigated. The results show that the ordered pore structure is retained after the magnesiothermic reduction of well-ordered mesoporous silica. The carbon in the composite can effectively improve the electrical conductivity and enhance cycling stability of the composite. The porous structure may alleviate the volumetric changes and improve cycling stability of the electrode materials during lithium ion insertion and extraction. The three kinds of porous Si/C composites from SBA-15, MCM-48 and diato-mite exhibit reversible capacitits of 712, 664, and 463 mA·h/g at a rate of 200 mA/g after 30 cycles, respectively.关键词
锂离子电池/负极/多孔硅/碳/复合材料Key words
lithium ion batteries/anode/porous silicon/carbon/composite分类
信息技术与安全科学引用本文复制引用
陶华超,王明珊,范丽珍..镁热还原法制备多孔硅碳复合负极材料[J].硅酸盐学报,2013,(8):1046-1050,5.基金项目
国家973项目(2013CB934001)；国家自然科学基金(51172024)。 （2013CB934001）
