电子元件与材料2024，Vol.43Issue(7)：764-771,8.DOI:10.14106/j.cnki.1001-2028.2024.0137
低成本Nb掺杂Li7La3Zr2O12固态电解质的性能与应用研究
Properties and application of low-cost Nb-doped Li7La3Zr2O12 solid electrolyte
冯玉川 1张鑫 2王明辉 3何泓材 4林元华1
作者信息
- 1. 清华大学材料学院,北京 100084
- 2. 景德镇陶瓷大学材料科学与工程学院,江西景德镇 333403
- 3. 清陶(昆山)能源发展股份有限公司清陶新能源材料研究院,江苏昆山 215300||宜春清陶能源科技有限公司,江西宜春 336000
- 4. 清陶(昆山)能源发展股份有限公司清陶新能源材料研究院,江苏昆山 215300||苏州清陶新能源科技有限公司,江苏昆山 215300
- 折叠
摘要
Abstract
Solid-state batteries have attracted considerable attention due to their outstanding performance in energy density,cycle life and safety.The core component of such batteries is the solid electrolyte material.Oxide solid electrolytes with garnet structure,such as Li7La3Zr2O12(LLZO),have been widely studied due to their broad electrochemical stability window,excellent ion conductivity,chemical stability and straightforward fabrication process.In this study,Nb doping was employed to modify LLZO,leading to the successful synthesis of Li6.75La3Zr1.75Nb0.25O12(LLZNO)oxide solid electrolyte.It exhibited an ion conductivity of 7.79×10-4 S/cm without significant increase in the fabrication cost.This material was coated onto the surface of polyethylene(PP)membranes to form PP-LLZNO membranes,which demonstrated excellent thermal stability and ion conductivity.Compared with the batteries assembled with Al2O3 coated membranes or solid electrolyte Li6.75La3Zr.75Ta0.25O12(LLZTO)coated membranes,the button cells and pouch cells assembled with PP-LLZNO coated membranes showed superior capacity retention rates of 84.99％(50 cycles)and 57.40％(100 cycles),respectively.This work provides reference for the large-scale production of solid electrolytes and its application in solid-state batteries.关键词
固态电池/Li7La3Zr2O12/Nb掺杂/固态电解质涂覆隔膜/软包电池Key words
solid-state battery/Li7La3Zr2O12/Nb doping/solid electrolyte coated membrane/pouch cell分类
信息技术与安全科学引用本文复制引用
冯玉川,张鑫,王明辉,何泓材,林元华..低成本Nb掺杂Li7La3Zr2O12固态电解质的性能与应用研究[J].电子元件与材料,2024,43(7):764-771,8.
