还原氧化石墨烯包覆钛酸锂复合材料的制备及其电化学性能研究  

Preparation and electrochemical properties of reduced graphene oxide-coated lithium titanate composites

作　　者：刘航 秦龙威 徐振凯 蔺多佳 张剑峰 夏鑫[1] Liu Hang;Qin Longwei;Xu Zhenkai;Lin Duojia;Zhang Jianfeng;Xia Xin(College of Textile and Clothing,Xinjiang University,Urumchi 830017)

机构地区：[1]新疆大学纺织与服装学院,乌鲁木齐830017

出　　处：《化工新型材料》2025年第2期182-186,共5页New Chemical Materials

基　　金：国家自然科学基金(202210120005);新疆特种纺织材料的开发与应用研究天山创新团队(2017D14002);“双一流”背景下纺织工程专业硕士研究生创新成果评价体系改革探索(XJ2022GY07)。

摘　　要：为了得到循环稳定性和倍率性能优异的钛酸锂(LTO)负极材料,将质量浓度不同的氧化石墨烯与LTO材料进行物理混合,再通过热处理方法制备出还原氧化石墨烯包覆钛酸锂(LTO@rGO)复合材料。通过X射线粉末衍射仪、拉曼光谱仪、X射线光电子能谱仪、扫描电子显微镜和电化学工作站对复合材料的晶体结构、形貌和电化学性能进行表征和测试。结果表明:氧化石墨烯质量浓度为2mg/mL时,在电流密度为1C条件下,LTO@rGO复合材料初始比容量为168mAh/g,经过50次循环后容量为165.2mAh/g,具有优异的电化学性能。To obtain lithium titanate(LTO)anode materials with outstanding cycle stability and rate performance,physically blending graphene oxide with varying mass concentrations into LTO materials,followed by a heat treatment process,was employed to fabricate reduced graphene oxide-coated lithium titanate(LTO@rGO)composites.The crystal structure,morphology,and electrochemical properties of the composites were characterized and tested using X-ray powder diffractometry,Raman spectroscopy,X-ray photoelectron spectroscopy,scanning electron microscopy,and an electrochemical workstation.The results indicated that when the mass concentration of graphene oxide was 2 mg/mL,the LTO@rGO composite exhibited an initial specific capacity of 168 mAh/g at a current density of 1C and retained a capacity of 165.2mAh/g after 50 cycles,demonstrating excellent electrochemical performance.

关 键 词：钛酸锂 还原氧化石墨烯 表面改性 电化学性能 

分 类 号：TQ13[化学工程—无机化工] TM912[电气工程—电力电子与电力传动]