钛铌氧化物作为锂二次电池负极的锂扩散特性及高倍率性能研究

Study of the lithium diffusion properties and high rate performance of TiNbO as an anode in lithium secondary battery.

作者信息

Lee Yong-Seok, Ryu Kwang-Sun

机构信息

Department of Chemistry, University of Ulsan, Ulsan, 680-749, Korea.

出版信息

Sci Rep. 2017 Nov 30;7(1):16617. doi: 10.1038/s41598-017-16711-9.

DOI:10.1038/s41598-017-16711-9

PMID:29192220

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5709400/

Abstract

TiNbO and TiNbO were synthesized using a solid-state method. The techniques were used to assess the electrochemical performance and lithium diffusion kinetics of TiNbO related to the unit cell volume with TiNbO. The charge-discharge curves and cyclic voltammetry revealed TiNbO to have a similar redox potential to TiNbO as well as a high discharge capacity. The rate performance of TiNbO was measured using a rate capability test. SSCV and EIS showed that TiNbO had higher lithium diffusion coefficients during the charging. From GITT, the lithium diffusion coefficients at the phase transition region showed the largest increase from TiNbO to TiNbO.

摘要

采用固态法合成了TiNbO和TiNbO。这些技术用于评估与TiNbO晶胞体积相关的TiNbO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，TiNbO与TiNbO具有相似的氧化还原电位以及高放电容量。使用倍率性能测试测量了TiNbO的倍率性能。SSCV和EIS表明，TiNbO在充电过程中具有更高的锂扩散系数。从GITT可知，在相变区域，从TiNbO到TiNbO，锂扩散系数增加幅度最大。