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用于高级金属电池的单离子导电聚合物电解质

Xu Dong^1,2, Xu Liu^1,2, Huihua Li^1,2

¹Helmholtz Institute Ulm (HIU), Helmholtzstrasse 11, 89081, Ulm, Germany.

Angewandte Chemie (International ed. in English)

|July 26, 2023

概括

一种新的单离子导电聚合物电解质 (SIPE) 为金属电池 (SMB) 提供了稳定和高性能解决方案. 这一进步解决了金属反应性的挑战,为更安全,更高能量的电池铺平了道路.

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) 正在被探索作为金属电池 (LMB) 的替代品,因为它们具有高能量密度的潜力.
金属与传统液体电解质的高反应性为中小企业技术带来了重大安全和稳定性挑战.

研究的目的:

开发和评估一种新型的多块单离子导电聚合物电解质 (SIPE),用于金属电池.
解决与中小企业电解质中的金属相关的界面不稳定性和反应性问题.

主要方法:

一个多块单离子导电聚合物电解质 (SIPE) 与乙烯碳酸盐合的合成.
电化学表征,包括离子导电量测量和电化学稳定性窗口的确定.
制造和测试NavigationNa3V2(PO4)3细胞,以评估循环性能,速率能力和库伦比效率.

主要成果:

开发的SIPE具有高离子导电性 (2.6 mS cm-1) 和广泛的电化学稳定性窗口 (约. 4.1 V) 的情况.
实现了稳定的剥离和涂层,以及在Na3V2(PO4)3细胞中高达2C的优异速率能力.
细胞表现出显著的容量保留 (85%在0.2°C的1000个循环后) 和高库伦比效率 (99.9%).

结论:

新型的SIPE,用乙烯碳酸盐添加,提供了与金属和Na3V2(PO4) 3阴极的优异界面稳定性.
这种聚合物电解质系统显著提高了金属电池的性能和循环寿命.
这些发现表明,高性能和稳定的金属电池的实际实施是一个有希望的途径.

关键词:

电池电池电池电池电池 Na3V2(PO4) 3 3 的使用情况.聚合物电解质聚合物电解质一个单离子导体导体金属是一种金属.

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