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设计F / P混合聚合物作为高性能金属电池的超稳定阴离子屏蔽介相

Shantao Han¹, Baifei Wu², Huaijiao Wang¹

¹State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200433, China.

Angewandte Chemie (International ed. in English)

|July 26, 2023

概括

研究人员开发了一种新型的离子聚合物,以防止金属电池 (LMB) 中的树生长. 这种保护层提高了电池的稳定性和性能,为更安全,更持久的能量存储铺平了道路.

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
聚合物化学聚合物化学

背景情况:

金属电池 (LMB) 对高能量密度存储具有前景.
在阳极上形成树是一种主要的安全性和性能问题,限制了LMB应用.
需要有效的策略来控制沉积并确保稳定的循环.

研究的目的:

为阳极开发一种新型的保护层,以抑制树突的生长.
研究一种具有碳化合物和酸的离子交替聚合物的特性和有效性 (F/P混合聚合物).
证明这种聚合物在提高LMBs的电化学性能和稳定性方面的潜力.

主要方法:

合成一种含有碳和离子单位的离子交替聚合物.
制造F/P混合聚合物作为阳极上的保护层.
电化学表征包括循环性能,速率能力和电化学阻抗光谱学.
表面分析和现场/操作特征 (例如,SEM,TEM,XPS) 和计算模拟.

主要成果:

F/P混合聚合物层表现出优异的电化学稳定性和适应性链流动性.
聚合物有效调节离子流,提供静电屏蔽,并使阳极的电场均.
实现了无树的沉积,导致抑制了涂层分解.
使用受保护的阳极的全细胞表现出增强的速率能力和长期循环稳定性.

结论:

开发的FP混合聚合物作为LMB中的阳极的有效保护层.
这种聚合物设计策略成功地抑制了树的生长,提高了电池的安全性和寿命.
这些发现突显了定制聚合物电解质在推进下一代储能器件方面的潜力.

关键词:

没有树石的阳极.电静电屏蔽电静电屏蔽电静电屏蔽聚合物的化聚合物.金属电池金属电池斯尼是一种的物质.

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