在Li10SnP2S12固体电解质中增强的离子导电性和稳定性,通过离子兴奋剂
Hongda Li1,2, Shuai Jian3,2, Lingzhi Yang1
1Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, School of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, China.
ACS applied materials & interfaces
|December 24, 2025
概括
胺增强了硫化物固体电解质,用于更好的全固态电池. 这种Li10SnP2S12 (LSPS) 修改改进了离子导电性和稳定性,提高了电池性能和寿命.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 固态化学 固态化学
背景情况:
- 硫化物固体电解质是高性能全固态电池的关键.
- 10SnP2S12 (LSPS) 具有良好的导电性和可持续性,但需要提高稳定性.
- 平衡离子运输和电化学稳定性仍然是一个挑战.
研究的目的:
- 为了合成和描述添加的Li10SnP2S12 (LSPST) 电解质.
- 调查Te兴奋剂对离子导电性,激活能量和电化学稳定性的影响.
- 为了评估LSPST在全固态电池全电池中的性能.
主要方法:
- 高能球磨和梯度回火用于LSPST合成.
- 结构分析 (例如,XRD) 来确认Te的替代.
- 电化学测量 (离子导电,阻抗光谱) 和理论计算 (DFT,MD模拟).
- 制造和测试Li-In/LSPST/Li6PS5Cl/NCM811全电池. 制造和测试Li-In/LSPST/Li6PS5Cl/NCM811全电池. 制造和测试Li-In/LSPST/Li6PS5Cl/NCM811全电池. 制造和测试Li-In/LSPST/Li6PS5Cl/NCM811全电池. 制造和测试Li-In/LSPST/Li6PS5Cl/NCM811全电池. 制造和测试Li-In/LSPST/Li6PS5Cl/NCM811全电池. 制造和测试Li-In/LSPST/Li6PS5Cl/NCM811全电池.
主要成果:
- 在Li10SnP2S12.12中在S位点进行均Te替代.
- 最佳的Te兴奋剂 (x=0.1) 提高了离子导电率45.2% (4.3 × 10^-3 S cm^-1) 与较低的激活能量 (0.259 eV).
- 兴奋剂抑制了电子导电性,抑制了树突,并改善了全细胞性能 (136.1 mAh g^-1初始容量,50个循环后67.9%的保留).
结论:
- 使用Te的阳离子兴奋剂是一种有效的策略,可以增强硫化电解质中的离子运输和电化学稳定性.
- LSPST电解质为开发高性能,具有成本效益的全固态电池提供了一个有前途的途径.
- 这项研究提供了对优化硫化物固体电解质的结构性质关系的见解.
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