TiO_(2)改性SiO材料的制备及储锂性能  

Preparation and Lithium Storage Properties of TiO_(2) Modified SiO Materials

作　　者：张美霞 徐亚彬 易丽 江海湖 梁逵[1] ZHANG Meixia;XU Yabin;YI Li;JIANG Haihu;LIANG Kui(College of Materials Science and Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学材料科学与工程学院,长沙410082

出　　处：《硅酸盐学报》2021年第10期2115-2122,共8页Journal of The Chinese Ceramic Society

摘　　要：通过溶胶-凝胶和高温固相法制备了SiO@TiO_(2)/C复合材料。结果表明:由于TiO_(2)对界面稳定性及锂离子扩散过程的促进作用,SiO@TiO_(2)/C材料拥有优良的循环和倍率性能。在1 A/g的电流密度下循环150次,材料表现出710 m A·h/g的比容量;在4 A/g的高电流密度下可逆比容量仍能达到430 m A·h/g。A SiO@TiO_(2)/C composite was synthesized by a sol-gel method and a subsequent high-temperature solid-phase method.The results show that SiO@TiO_(2)/C material exhibits an excellent cycling and rating performance due to the promotion of TiO_(2) on the interface stability and lithium-ion diffusion process.A high specific capacity of 710 m A·h/g is achieved after 150 cycles at a current density of 1 A/g,and the reversible capacity is 430 mA·h/g at a high current density of 4 A/g.

关 键 词：氧化亚硅 碳 二氧化钛 负极材料 锂离子电池 

分 类 号：TB333[一般工业技术—材料科学与工程]