Experimental and theoretical study on enhanced electrochemical properties of double doped garnet-type solid electrolyte

被引：1

作者：

Yu, Shiyu ^{[1
]}

Chen, Yutong ^{[1
]}

Xie, Wenfei ^{[1
]}

Li, Jie ^{[1
]}

Chen, Daming ^{[1
]}

Wei, Yaqing ^{[1
]}

Li, Yuanxun ^{[2
]}

Yang, Qinghui ^{[2
]}

Chen, Yong ^{[3
]}

机构：

[1] Hainan Univ, Sch Mat Sci & Engn, State Key Lab Marine Resource Utilizat South China, Hainan Prov Key Lab Res Utilizat Si Zr Ti Resource, Haikou 570228, Peoples R China

[2] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Device, Chengdu 610054, Peoples R China

[3] Foshan Univ, Sch Mat Sci & Hydrogen Energy, Guangdong Key Lab Hydrogen Energy Technol, Foshan 528000, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2024年 / 314卷

基金：

海南省自然科学基金;

关键词：

Solid electrolyte; Double-doping; Cubic phase; ENERGY-STORAGE; LITHIUM; CONDUCTIVITY; BATTERIES;

D O I：

10.1016/j.matchemphys.2023.128851

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Garnet-type solid electrolyte (Li7La3Zr2O12, LLZO) is believed as a promising candidate for all-solid-state battery due to its high voltage window and good stability with metallic lithium. However, it exists as tetragonal phase with low ionic conductivity at room temperature, which seriously hinders its practical application. In this paper, the strategy of In/Ga ions was introduced into LLZO, which can be found that double doping can improve the structural stability and the electrochemical properties of the sample compared to single doping. When x = 0.1, the sample Li6.55+xGa0.15La3Zr2-xInxO12 shows the high ionic conductivity of 1.5 x 10-4 S/cm, and activation energy of 0.268 eV. Density functional theory (DFT) calculation show that the introduce of In3+ and Ga3+ can effectively improve the ion transport capacity to reduce the transport energy barrier. In addition, the Li/In/Ga-LLZO/Li cells could cycle stably for 1000 h at 60 degrees C with the current density of 0.1 mA/cm2.

引用

页数：8

共 29 条

[1] Building better batteries [J].