Study of the lithium diffusion properties and high rate performance of TiNb(6)O(17) as an anode in lithium secondary battery.

Study of the lithium diffusion properties and high rate performance of TiNb(6)O(17) as an anode in lithium secondary battery.
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DOI:
10.1038/s41598-017-16711-9
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发表时间:
2017-11-30
期刊:
影响因子:
4.6
通讯作者:
Ryu KS
Ryu KS
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Lee YS;Ryu KS

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采用固相法合成了TiNb6O17和TiNb2O7。该技术用于评估与 TiNb2O7 晶胞体积相关的 TiNb6O17 的电化学性能和锂扩散动力学。充放电曲线和循环伏安法表明TiNb6O17具有与TiNb2O7相似的氧化还原电位以及高放电容量。 TiNb6O17 的倍率性能通过倍率能力测试来测量。 SSCV和EIS表明TiNb6O17在充电过程中具有较高的锂扩散系数。从GITT来看,相变区的锂扩散系数显示出从TiNb2O7到TiNb6O17的最大增加。
TiNb6O17 and TiNb2O7 were synthesized using a solid-state method. The techniques were used to assess the electrochemical performance and lithium diffusion kinetics of TiNb6O17 related to the unit cell volume with TiNb2O7. The charge-discharge curves and cyclic voltammetry revealed TiNb6O17 to have a similar redox potential to TiNb2O7 as well as a high discharge capacity. The rate performance of TiNb6O17 was measured using a rate capability test. SSCV and EIS showed that TiNb6O17 had higher lithium diffusion coefficients during the charging. From GITT, the lithium diffusion coefficients at the phase transition region showed the largest increase from TiNb2O7 to TiNb6O17.
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