| Sn 掺杂LATP 固态电解质的制备及其电化学性能 |
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| 引用本文：刘轩,黎阳,王利军,乔永民.Sn 掺杂LATP 固态电解质的制备及其电化学性能[J].上海第二工业大学(中文版),2025,42(3):268-277 |
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| 基金项目:郴州2022 年国家可持续发展议程创新示范区建设省级专项(2022sfq26) 资助 |
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| 中文摘要:锂离子电池(lithium-ion batteries, LIBs) 作为当前主流的电化学储能产品, 凭借其高能量密度、长循环寿命和较低的自放电率, 被广泛应用于便携式电子设备、电动汽车和大型储能系统。然而, 目前商用的电解液体系中包含高度易燃且有毒的有机溶剂, 存在显著的安全隐患, 因此开发新型固态电解质材料成为提升LIBs 安全性与电化学性能的关键。NASICON 型超离子导体磷酸钛铝锂[Li1.3Al0.3Ti1.7(PO4)3, LATP] 具有较高的离子电导率、较宽的电化学窗口及良好的水与空气稳定性。本研究采用溶胶凝胶法制备Sn 掺杂的LATP 材料, 有效增强了其稳定性并提升了电化学性能: 所得材料在室温下的离子电导率为74.5 mS/m, Li+ 迁移数为0.52。 |
| 中文关键词:固态电解质 磷酸钛铝锂 溶胶凝胶法 掺杂Sn 离子电导率 |
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| Preparation and Electrochemical Properties of Sn Doped LATP Solid Electrolyte |
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| Abstract:Lithium-ion batteries (LIBs), as the current mainstream electrochemical energy storage products, are widely used in portable electronic devices, electric vehicles and large-scale energy storage systems due to their high energy density, long cycle life, and low self-discharge rate. However, the electrolytes in current commercial systems contain highly flammable and toxic organic solvents, which poses significant safety hazards. Therefore, developing novel solid-state electrolyte materials has become a critical approach to enhance the safety and electrochemical properties of LIBs. The NASICON-type superionic conductor lithium aluminum titanium phosphate [Li1.3Al0.3Ti1.7(PO4)3, LATP] exhibits high ionic conductivity, a wide electrochemical window and good stability in both water and air. The preparation of Sn-doped LATP via the sol-gel method leads to enhanced structural stability and improved electrochemical properties. The room-temperature ionic conductivity of the synthesized material is 74.5 mS/m, with a Li+ transference number of 0.52. |
| keywords:solid-state electrolyte lithium aluminum titanium phosphate sol-gel method doped with Sn ionic conductivity |
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