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Effect of excess lithium on the electrical properties of Li0.25La0.25NbO3 ceramics

SHIHANG HU1, SHUAI ZHANG1, CHENGCHENG CAI1, ZEXIONG WANG1, JIE CHANG1, YAZHOU KONG1,* , HONGBO WANG2, KAILONG ZHANG3, GUANG HU1, WEIWEI HU1, HAO SUN1, JINQUAN WANG1, JIADONG ZHANG1, KUN HONG1

Affiliation

  1. National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization, Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huaian 223003, P. R. China
  2. Jiangsu Oseaguard Science and Technology Co., Ltd, Huaian 223100, P. R. China
  3. Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, Huaian 223003, P. R. China

Abstract

In this study, the effect of excess Li2CO3 in raw materials on the electrical property for Li0.25La0.25NbO3 ceramic has been researched. Li0.25La0.25NbO3 solid electrolytes with different contents of excess Li2CO3 was prepared via a simple solid state reaction. The conductivity of LLNO-Li 15 (15 wt % excess Li2CO3) is 1.17×10−5 S cm-1 at 25 °C, which is 100 times higher than that of LLNO-Li 0 without excess Li2CO3. An appropriate proportion of excess Li2CO3 significantly improves the conductivity of LLNO ceramics. However, over numerous excess lithium will also damage the conductivity. The optimal excess lithium content is determined to be 15 wt%.

Keywords

Li0.25La0.25NbO3 , Ceramic, Solid electrolyte, Conductivity.

Citation

SHIHANG HU, SHUAI ZHANG, CHENGCHENG CAI, ZEXIONG WANG, JIE CHANG, YAZHOU KONG, HONGBO WANG, KAILONG ZHANG, GUANG HU, WEIWEI HU, HAO SUN, JINQUAN WANG, JIADONG ZHANG, KUN HONG, Effect of excess lithium on the electrical properties of Li0.25La0.25NbO3 ceramics, Optoelectronics and Advanced Materials - Rapid Communications, 18, 9-10, September-October 2024, pp.490-494 (2024).

Submitted at: Jan. 14, 2024

Accepted at: Oct. 2, 2024