电池2017，Vol.47Issue(5)：277-280,4.DOI:10.19535/j.1001-1579.2017.05.006
球形Li4Ti5O12/NC复合材料的制备及性能
Preparation and performance of spherical Li4Ti5O12/NC composite
摘要
Abstract
CH3COOLi,Ti(OC4H9)4,PEG1000 and CO (NH2)2 were used as lithium source,titanium source,carbon source and nitrogen source,respectively,the composite of lithium titanate(Li4Ti5 O12) coated by nitrogen doping carbon (NC) were prepared by sol-gel method.XRD,X-ray photoelectron spectroscopy and thermal gravimetric analyzer were used to test the morphology and element component of the material.The SEM and transmission electron microscope tests were utilized to characterize the microcosmic structure.The prepared materials were like of sphere,NC covering could not affect the morphology of Li4Ti5O12,but led to the transformation from Ti4+ to Ti3 + during the sintering process.The galvanostatic charge-discharge,cyclic voltammetry and AC impedance spectroscopy tests showed that the electrochemical performance of spherical Li4Ti5O12 by NC covering was increased.When the coating amount of NC was 4.11％,the cycle performance of composite was the best.Its specific capacity was kept at 103.5 mAh/g when cycled 100 times at 1 C in 0.8-2.5 V.关键词
锂离子电池/钛酸锂(Li4Ti5O12)/氮修饰碳(NC)/电化学性能Key words
Li-ion battery/lithium titanate(Li4Ti5O12)/nitrogen doping carbon(NC)/electrochemical performance分类
信息技术与安全科学引用本文复制引用
万露,胡颖,付争兵..球形Li4Ti5O12/NC复合材料的制备及性能[J].电池,2017,47(5):277-280,4.基金项目
国家自然科学基金项目(51402095),湖北省教育厅项目(B2015184) （51402095）
