高效的离子运输"聚合物在陶"电解质提高了完全固态金属电池的稳定性
Shilei Chang1, Qi Wang2, Aonan Wang1
1School of Metallurgy and Environment, Hunan Province Key Laboratory of Nonferrous Value-Added Metallurgy, Engineering Research Center of the Ministry of Education for Advanced Battery Materials, National Energy Metal Resources and New Materials Key Laboratory, Central South University, Changsha, Hunan 410083, PR China.
在聚合物在陶 (PIC) 电解质中优化陶颗粒大小,可以提高全固态电池 (ASSB) 的离子运输和均沉积,提高离子导电性和稳定性.
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
- 固态电池 固态电池是什么
背景情况:
- 聚合物在陶 (PIC) 电解质为全固态电池 (ASSB) 提供了热和机械优势.
- 在实现快速的离子运输和在PIC电解质中均的Li+沉积方面仍然存在挑战.
- 陶颗粒大小对Li+运输和阳极兼容性的影响尚不清楚.
研究的目的:
- 为了优化PIC电解质中的陶颗粒大小,以实现平衡的离子导电性和阳极兼容性.
- 为了研究陶颗粒大小对离子传输机制的影响.
- 通过优化 PIC 电解质来提高全固态电池的性能.
主要方法:
- 制备和表征不同陶颗粒大小的PIC电解质.
- 电化学阻抗光谱法用于测量离子导电.
- /PIC/对称细胞循环以评估+沉积和稳定性.
- 组装和测试Li/PIC/LiFePO4电池以评估电池性能.
主要成果:
- 确定了17微米的优化陶颗粒大小,平衡了接口阻抗和表面粗度.
- 17微米的PIC电解质表现出增强的Li+导电性 (4.11 × 10^-4 S cm^-1在60°C) 和高转移数 (0.74).
- /PIC/对称细胞表现出2800小时的稳定循环,/PIC/LiFePO4细胞表现出良好的容量保留 (93.28%在100个循环后).
结论:
- 适度的陶颗粒大小对于优化PIC电解质中的Li+流量和导电性至关重要.
- 优化的17微米PIC电解质显著提高了离子导电性和阳极兼容性.
- 这项研究为开发使用定制PIC电解质的高性能和稳定的全固态电池提供了途径.
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