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在高性能离子电池的纳米金属/电极上的in situ聚合凝电解质

Debalina Deb¹, Sanhita Pal², Yuliia Kravets³

¹Interdisciplinary Centre for Energy Research, Indian Institute of Science, Bengaluru, Karnataka, 560012, India.

Small (Weinheim an der Bergstrasse, Germany)

|October 7, 2025

概括

一种新的凝聚合物电解质 (GPE) 为高性能离子电池提供了稳定,固态的替代品. 这种GPE通过防止树突的生长和确保稳定的接口来提高电池的安全性和寿命.

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
聚合物科学聚合物科学

背景情况:

在离子电池 (SIB) 中常规的液态电解质由于易燃性和树石形成而带来安全风险.
陶固体电解质虽然比较安全,但往往因接口接触不良和离子导电性低而受到损害.
开发具有高离子导电性和稳定的接口的固体类电解质对于先进的SIB至关重要.

研究的目的:

为了合成和表征一种新的固体离子导电凝聚合物电解质 (GPE) 用于高性能SIB.
评估开发的GPE的电化学性能,接口稳定性和安全性方面.
为了证明GPE与不同的电极材料的兼容性,包括金属和Na3V2 ((PO4) 3.3.

主要方法:

液体电解质和聚合物前体在多孔电聚烯 (PAN) 膜内的现场聚合.
电化学阻抗光谱 (EIS) 用于分析离子导电性和固体电解质间相 (SEI) 增长.
循环电压测量和静电循环,以评估电池性能和稳定性.

主要成果:

GPE实现了高的离子导电性 (≈1 mS cm-1) 和0.63.3的转移数.
具有5.2V的广泛的电化学稳定性窗口,以及与金属的优异界面稳定性.
缓解了树的生长,使数百个周期的稳定循环具有低的超潜力.
经过长时间的稳定SEI形成,与液体电解质不同.
在Na3V2(PO4)3和对称电池以及基于Sn的合金阳极中实现了显著的循环利用性.

结论:

合成的GPE作为一个有希望的固体类电解质,用于高性能和更安全的离子电池.
GPE的强大的接口特性和树突抑制能力显著提高了电池周期寿命和稳定性.
开发的GPE表现出多功能性,显示出与硬碳以外的各种阳极材料的使用潜力.

关键词:

它们包括Na3V2(PO4)3和Sn-合金.离子电池是一种离子电池.树突和SEI都是这样的.凝聚合物的电解质是凝聚合物的电解质.固体类型的电解质.

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