| Li_4Ti_5O_(12)/(Ag+C)极材料的固相合成及电化学性能 |
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| 引用本文： | 王蔚,曹高劭,叶静雅,赵新兵.Li_4Ti_5O_(12)/(Ag+C)极材料的固相合成及电化学性能[J].无机化学学报,2009,25(12). |
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| 作者姓名： | 王蔚 曹高劭 叶静雅 赵新兵 |
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| 作者单位： | 浙江大学材料科学与工程学系,杭州,310027 |
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| 摘 要： | 以Li_2CO_3,TiO_2为原料,葡萄糖为碳源,采用固相煅烧工艺合成了亚微米级的Li_4Ti_5O_(12)/C复合负极材料.并将之与AgNO_3复合,采用固相方法制备出了Ag表面修饰的Li_4Ti_5O_(12)(AG+C)复合材料.采用XRD、SEM和TEM测试方法对材料的微结构进行了表征.结果表明,C的存在对Ag单质在Li_4Ti_5O_(12)/C颗粒表面的大量形成起到了积极的促进作用.从而很大程度地提高了Li_4Ti_5O_(12)/C的电导率,因此有效地改善了其电化学性能.在1C倍率下,Li_4Ti_5O_(12)/(Ag+C)复合材料的首次放电容量达到了164 mAh·g(-1).
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| 关 键 词： | Li_4Ti_5O_(12)/(Ag+C) 表面修饰 锂离子电池 固相合成 |
Solid-State Synthesis and Electrochemical Performance of Li_4Ti_5O_(12)/C(Ag+C)Electrode Material |
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| WANG Wei,CAO Gao-Shao,YE Jing-Ya,ZHAO Xin-Bing.Solid-State Synthesis and Electrochemical Performance of Li_4Ti_5O_(12)/C(Ag+C)Electrode Material[J].Chinese Journal of Inorganic Chemistry,2009,25(12). |
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| Authors: | WANG Wei CAO Gao-Shao YE Jing-Ya ZHAO Xin-Bing |
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| Abstract: | Li_4Ti_5O_(12)/C composite anode with a sub-micron size was synthesized via one-step calcination reaction using Li_2CO_3 and TiO_2 as the starting materials and glucose as the carbon source.Li_4Ti_5O_(12)/(Ag+C)composite wasprepared by heating Li_4Ti_5O_(12)/C with AgNO_3.Microstructures of the materials were characterized by XRD.SEM and TEM techniques.It is found that the existence of C facilitates the formation of Ag on the surface of the Li_4Ti_5O_(12)/C particle,causing the enhancement of its electronic conductivity.As a result,the electrochemical performance of Li_4Ti_5O_(12)/C Was improved.The Li_4Ti_5O_(12)/(Ag+C)composite shows a high initial discharge capacity of 164mAh·g~(-1)at 1C rate. |
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| Keywords: | Li_4Ti_5O_(12)/(Ag+C) surface modification Li-ion battery solid-state synthesis |
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