Synthesis and electrochemical properties of La-doped Li4Ti5O12 as anode material for Li-ion battery
Synthesis and electrochemical properties of La-doped Li4Ti5O12 as anode material for Li-ion battery
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锂离子电池负极材料La掺杂Li4Ti5O12的合成及电化学性能
DOI：
10.1016/j.ceramint.2012.12.010
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发表时间：
2013-07
影响因子：
5.2
通讯作者：
He D.
中科院分区：
文献类型：
--
作者：
Zhang C.;Zhang Y.;Wang J.;He D.
以Li 2CO 3、La 2 O3和钛酸四丁酯为原料，采用简单的球磨辅助改性固相法成功合成了La掺杂的Li 4 Ti 5 O 12。研究了La掺杂对Li 4 Ti 5 O 12晶体结构、粒径、形貌和电化学性能的影响。采用XRD、SEM、恒流充放电和电化学阻抗谱对样品进行了表征。结果表明，原位包覆和球磨的方法可以减小Li 4 Ti 5 O 12的粒径，防止其团聚。La掺杂通过降低电极极化和提高电子电导率，显著改善了Li 4 Ti 5 O 12的倍率性能。Li_（3.95）La_（0.05）Ti_5 O_（12）具有较好的倍率性能和循环稳定性。在0.5C和40 C充放电倍率下，其放电容量分别为176.8mAh/g和54.7mAh/g。经过10次循环后，在0.5C、1C、2C、5C、10 C、20 C和40 C下获得了相当稳定的循环性能，没有明显的容量衰减。另外，与Li 4 Ti 5 O 12相比，Li3.95La0.05Ti5O12几乎没有初始容量损失。这表明Li3.95La0.05Ti5O12是一种很有前途的锂离子电池负极材料。
La-doped Li4Ti5O12was successfully synthesized from Li2CO3, La2O3and tetrabutyl titanate by a simple ball milling assisted modified solid-state method. The impact of La-doping on crystalline structure, particle size, morphology and electrochemical performance of Li4Ti5O12was investigated. The samples were characterized by XRD, SEM, galvanostatically charge–discharge and electrochemical impedance spectroscopy. The results demonstrated that the in-situ coated and ball-milling method could decrease the particle size and prevent the aggregation of Li4Ti5O12. La-doping obviously improved the rate capability of Li4Ti5O12via the generation of less electrode polarization and higher electronic conductivity. Li3.95La0.05Ti5O12exhibited a relatively excellent rate capability and cycling stability. At the charge–discharge rate of 0.5C and 40C, its discharge capacities were 176.8mAh/g and 54.7mAh/g. After 10 cycles, fairly stable cycling performance was achieved without obvious capacity fade at 0.5C, 1C, 2C, 5C, 10C, 20C and 40C. In addition, compared to Li4Ti5O12, Li3.95La0.05Ti5O12almost did not have the initial capacity loss. It indicated that Li3.95La0.05Ti5O12was a promising candidate material for anodes in Li-ion battery application.
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影响因子：
5.2
作者：
Tao Yuan;R. Cai;Ke Wang;R. Ran;Shaomin Liu;Zongping Shao
通讯作者：
Tao Yuan;R. Cai;Ke Wang;R. Ran;Shaomin Liu;Zongping Shao
影响因子：
9.2
作者：
COLBOW, KM;DAHN, JR;HAERING, RR
通讯作者：
HAERING, RR
影响因子：
5.4
作者：
Da Wang;Huajun Xu;M. Gu;Chun-hua Chen
通讯作者：
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碳包覆的 Li4Ti5O12 作为锂离子嵌入的高倍率电极材料
影响因子：
3.9
作者：
Cheng, Liang;Li, Xi-Li;Xia, Yong-Yao
通讯作者：
Xia, Yong-Yao
影响因子：
6.6
作者：
Guoxiu Wang;S. Bewlay;K. Konstantinov;H. Liu;S. Dou;Jung-Ho Ahn
通讯作者：
Guoxiu Wang;S. Bewlay;K. Konstantinov;H. Liu;S. Dou;Jung-Ho Ahn