激活凝聚合物基于电解质的离子导电与先进的电池的填充器集成
Bin Sun1,2, Yuanzhi Zong1, Kangkang Bao1
1Research Center of Grid Energy Storage and Battery Application, School of Electrical and Information Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China.
ACS applied materials & interfaces
|July 25, 2023
概括
添加ZnO填充剂通过改善凝电解质导电性并使低温稳定性能显著提高准固体电池 (QSZB). 这增加了它们在灵活,高能储能应用中的潜力.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 准固态电池 (QSZB) 提供了有前途的高能量密度,安全性和灵活性.
- 实际使用受到纯凝电解质的低离子导电性和较差的机械强度的限制.
研究的目的:
- 研究无机填充剂以增强QSZB凝电解质中的离子导电.
- 利用理论研究 (密度函数理论) 来理解潜在的机制.
主要方法:
- 合成的复合电解质,具有不同度的无机填充剂.
- 在-20°C测量离子导电性.
- 测试了对称细胞的循环稳定性.
- 用氧化瓦纳组装和评估袋细胞.
主要成果:
- 一种最佳的ZnO填充剂量 (ZnO#20) 在-20°C时将离子导电率提高到1.3 × 10−3 S cm−1,显著超过了对照剂 (2.0 × 10−4 S cm−1).
- 该ZnO#20对称单元表现出超过1500小时的稳定循环.
- 组装后的袋式电池表现出多功能性,包括在扭转和在-20°C下操作时的灵活性.
结论:
- 无机填充剂,特别是ZnO,可以有效地提高QSZB凝电解质的离子导电能力和机械性能.
- 优化的QSZB显示出在苛刻条件下可靠的电化学能量存储的潜力,包括低温和机械应力.
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