Na2Ti3O7: an intercalation based anode for sodium-ion battery applications
Na2Ti3O7: an intercalation based anode for sodium-ion battery applications
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DOI：
10.1039/c2ta01057g
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发表时间：
2013-01-01
影响因子：
11.9
通讯作者：
Balaya, Palani
中科院分区：
文献类型：
--
作者：
Rudola, Ashish;Saravanan, Kuppan;Balaya, Palani
我们在此报告了 Na2Ti3O7 的电化学特性，Na2Ti3O7 是一种潜在的非碳基低压阳极材料，适用于室温钠离子电池应用。采用固态路线制备Na2Ti3O7。此外，还使用 XRD、SEM、TEM、HRTEM、SAED、XPS 和 EDX 技术来表征该材料。 Na/Na2Ti3O7电池在0.1 C倍率下的充电容量为177 mAh g(-1)。高倍率和不同倍率下的长期循环性能表现出相对稳定的存储能力。令人惊讶的是，如果改变较低的截止电压，就会出现新的充电平台，而放电行为没有明显的变化。利用 CV 和 EIS 技术讨论了钠插入和提取的动力学。我们还报告了使用 GITT 估计的 Na2Ti3O7/CB 电极的钠化学扩散系数。
We report here the electrochemical properties of Na2Ti3O7, a potential non-carbon based, low-voltage anode material for room temperature sodium ion battery applications. A solid-state route was used to prepare Na2Ti3O7. Further, XRD, SEM, TEM, HRTEM, SAED, XPS and EDX techniques were used to characterize the material. The Na/Na2Ti3O7 cell displayed a charge capacity of 177 mA h g(-1) at 0.1 C rate. High rate and long term cyclic performance at different rates showed relatively stable storage capacities. Surprisingly, if the lower cut-off voltage is altered, the appearance of a new charge plateau is seen, with no apparent change in the discharge behaviour. The kinetics of sodium insertion and extraction are discussed utilizing CV and EIS techniques. We also report the sodium chemical diffusion coefficient of the Na2Ti3O7/CB electrode estimated using GITT.