Synthesis of Ag-coated TiNb2O7 composites with excellent electrochemical properties for lithium-ion battery
Synthesis of Ag-coated TiNb2O7 composites with excellent electrochemical properties for lithium-ion battery
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锂离子电池电化学性能优异的Ag包覆TiNb2O7复合材料的合成
DOI：
10.1016/j.matlet.2017.03.145
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发表时间：
2017-06
影响因子：
3
通讯作者：
Jiali Guo
中科院分区：
文献类型：
--
作者：
Guangyin Liu;Xiaodi Liu;Yiyang Zhao;Xiaoguang Ji;Jiali Guo
Ag/TiNb2O7 复合材料是通过简单有效的固相方法和溶剂热过程合成的。结果发现Ag纳米粒子沉积在TiNb2O7微晶表面。 Ag/TiNb2O7作为锂离子电池负极时，1 C时二次放电容量为275.3 mA·h·g−1，大于纯TiNb2O7的234.2 mA·h·g−1；此外，Ag/TiNb2O7 表现出比 TiNb2O7 更好的倍率容量性能。 Ag纳米粒子的掺入提高了Ag/TiNb2O7电极的电子电导率，可以有效改善Li+嵌入/脱嵌过程中的电子传输，从而提高电化学性能。
Ag/TiNb2O7composites are synthesized by a facile and effective solid state method and following solvothermal process. It is found that Ag nanoparticles are deposited on the surfaces of TiNb2O7microcrystals. When Ag/TiNb2O7is used as the anode for lithium-ion battery, its 2nd discharge capacity is 275.3 mA·h·g−1at 1 C, larger than that of pure TiNb2O7(234.2 mA·h·g−1); moreover, Ag/TiNb2O7exhibits better rate capacity performance than TiNb2O7. The electronic conductivity of the Ag/TiNb2O7electrode is increased for the incorporation of Ag nanoparticles, which can effectively improve the electron transport in the Li+insertion/extraction process and accordingly enhance the electrochemical performance.
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