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Updated: Jun 29, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

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Published on: August 12, 2013

用于硫电池的固体电解质中的加快单一离子运输:聚 (?? 烯乙) 硫 (?? 烯乙) 接种与化终结聚 (乙烯糖醇)

Anh Le Mong¹, Jong Chan Shin², Minjae Lee²

¹School of Chemical Engineering, Sungkyunkwan University, Suwon, Gyeonggi, 16419, Republic of Korea.

Small (Weinheim an der Bergstrasse, Germany)

|December 28, 2023

概括

这项研究引入了一种新的固体电解质,用于更安全,更高容量的硫电池. 这种新材料实现了高离子导电性和机械强度,防止树的生长,从而提高了电池的性能.

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:

聚合物固体电解质对于高安全性,高能量的硫 (Li-S) 电池至关重要.
一个关键的挑战是平衡高离子导电性与机械强度,以防止 dendrite 的生长.

研究的目的:

为Li-S电池开发一种具有增强离子导电性和机械性能的新型固体电解质.
解决当前固体电解质在实现高离子导电性和机械强度方面的局限性.

主要方法:

在一个聚乙烯硫 (PAES-g-2PEGPYR) 骨干 (PAES-g-2PEGPYR) 上植入皮罗利丁酸 (PYR+) 功能化的聚乙烯甘醇.
离子导电性的表征,离子转移数,机械性能 (拉伸强度,模),氧化潜力和热稳定性.
/PAES-g-2PEGPYR/Li和/PAES-g-2PEGPYR/S细胞的制造和测试.

主要成果:

该PAES-g-2PEGPYR膜表现出高的离子转移数 (0.601) 和离子导电性 (1.38 mS cm-1).
实现了显著的机械强度 (1.0 MPa 拉伸强度,1.5 MPa 模量) 和高氧化潜力 (5.5 V).
在Li/PAES-g-2PEGPYR/S细胞中经过1000小时的稳定Li/PAES-g-2PEGPYR/Li细胞运行,以及在Li/PAES-g-2PEGPYR/S细胞中卓越的循环性能 (在200个循环后保持95.3%).

结论:

PAES-g-2PEGPYR固体电解质由于其独特的相隔结构和固定离子,有效地抑制了Li-dendrite的生长.
这种材料为开发高安全性和高能量密度的可充电硫电池提供了有前途的解决方案.

关键词:

灵活的电解质是灵活的电解质.植入共聚合物植入共聚合物硫电池是硫电池的一种.自动组装的自动组装机单个导电传导的.

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