The carbonitride/graphene modified lithium titanate composites were synthesized used the combination of tetrabutyl titanate and lithium hydroxide as raw materials and by hydrothermal and high-temperature solid phase method.XRD,FE-SEM and constant current charge-discharge measurement were used to characterize and tested the composite.It was found that the specific capacity can be achieved 107.3mAh/g at 5C,which can be retain 86.4mAh/g after 200 cycles.Compared with unmodified lithium titanate material,the electrochemical property of carbonitride/graphene modified lithium titanate composites were significantly improved.
[1] Shen C M,Zhang X G,Zhou Y K,et al.Preparation and characterization of nanocrystalline Li4Ti5O12 by sol-gel method[J].Materials Chemistry and Physics,2003,78(2):437-441.
[2] Tang Y F,Yang L,Qiu Z,et al.Preparation and electrochemical lithium storage of flower-like Li4Ti5O12 spinel consisting of nanosheets[J].Electrochemistry Communication,2008,10(10):1513-1516.
[3] Ouyang C Y,Zhong Z Y,Lei M S.Ab initio studies of structural and electronic properties of Li4Ti5O12 spinel[J].Electrochemistry Communication,2007,9(5):1107-1112.
[4] Guo X F,Wang C Y,Chen M M.A novel non-organic hydrothermal/hydrolysis method for preparation of well dispersed Li4Ti5O12[J].Materials Letter,2012,83(1):39-41.
[5] Lai C,Wu Z Z,Zhu Y X,et al.Ball-milling assisted solid-state reaction synthesis of mesoporous Li4Ti5O12 for lithium-ion batteries anode[J].Journal of Power Sources,2013,226(15):71-74.
[6] Hao Y J,Lai Q Y,Lu J Z,et al.Influence of various complex agents on electrochemical property of Li4Ti5O12 anode material[J].Journal of Alloys and Compounds,2007,439(1):330-336.
[7] Ohzuku T,Yamamoto A.Zero-strain insertion material of Li[Li1/3Ti5/3Ti5/3]O4 for rechargeable lithium cell[J].Journal of The Electrochemical Society,1995,142(5):1431-1435.
[8] Zheng S W,Xu Y L,Zhao C J,et al.Synthesis of nanosized Li4Ti5O12/C composite anode material with excellent high-rate performance[J].Material Letters,2012,68(1):32-35.
[9] Hummers W S,Offeman R E.Preparation of graphitic oxide[J].J Am Chem Soc,1958,80(6):1339-1339.
[10] Ho C S,Sung B P,Ho J,et al.Rate performance and structural change of Cr-doped LiFePO4/C during cycling[J].Electrochimica Acta,2008,53(27):7946-7951.
[11] Chen C C,Huang Y N,An C H,et al.Copper-doped dual phase Li4Ti5O12-TiO2 nanosheets as high-rate and long cycle life anodes for high-power lithium-ion batteries[J].Chemsuschem,2015,8(1):114-122.
[12] Huang S H,Wen Z Y,Zhu X J,et al.Preparation and electrochemical performance of Ag doped Li4Ti5O12[J].Electrochemical Communication,2004,6(11):1093-1097.
[13] Shi Y,Wen L,Li F,et al.Nanosized Li4Ti5O12/graphene hybrid materials with low polarization for high rate lithium ion battery[J].Journal of Power Sources,2011,196(20):71-74.
基金资助
国家自然科学基金项目(21808103);江苏省自然科学基金项目(BK20171012);常州市工业支撑项目(CE20150054)
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