多个Na+运输路径和接口兼容性使高容量,室温准固体电池成为可能
Yueqing Li1, Bixia Wei2, Jing Yu3
1College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China; College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, China.
Journal of colloid and interface science
|April 12, 2024
概括
研究人员开发了用于金属电池的新型准固体聚合物电解质. 这些电解质通过提高离子导电性和树抗性来提高安全性和性能,为先进的储能解决方案铺平了道路.
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:
- 金属电池 (SMB) 为大规模储能提供了高容量,但存在安全问题,如树的生长和副作用,特别是液体电解质.
- 开发安全,非易燃的电解质,具有高离子导电性和树抗性,对于推进中小企业技术至关重要.
研究的目的:
- 设计新的准固态聚合物电解质 (PPEs),以提高金属电池的安全性和性能.
- 研究聚合聚乙烯甘醇二烯酸盐 (PEGDA) 修饰在增强电解质特性中的作用.
主要方法:
- 开发基于PEGDA修饰的PVDF-HFP的准固体聚合物电解质 (PPEs),其中包括二三甲硫胺和二氧化盐.
- 对于离子导电性,机械强度和电化学稳定性的PPE的表征.
- 测试Na3V2(PO4)3gadgadPPE-50gadgadNa对称电池和Na3V2(PO4)3gadPPE-50gadNa全电池,以评估电池性能和循环稳定性.
主要成果:
- 优化的PPE-50表现出高离子导电性 (3.42 × 10−4 S cm−1) 和机械强度 (14.0 MPa).
- 在0.2 mA cm-2下,对称细胞在800个小时内表现出高稳定性,这表明树生长受到了抑制.
- 一个Na3V2 ((PO4) 3) 下载PPE-50下载Na电池在650个循环后在1.0C下提供了101.5mAhg-1的放电容量.
结论:
- PEGDA 修改增强了 PVDF-HFP 电解质无形性,并提供了易斯基位,促进 Na+ 运输和提高电池性能.
- 开发的准固体聚合物电解质为安全和高性能室温金属电池提供了有前途的途径.
- 该研究强调了定制聚合物电解质在下一代储能系统中的潜力.
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