用于增强存储阳极材料的化聚合物接种多孔微/聚烯复合物的接口工程
Yechan Lee1, Mahesh Naikwade1, Sang-Wha Lee1
1Department of Chemical and Biological Engineering, Gachon University, 1342 Seongnamdaero, Sujeong-Gu, Seongnam-Si 13120, Gyeonggi-do, Republic of Korea.
Polymers
|January 8, 2025
概括
研究人员开发了一种用于离子电池 (LIB) 的阳极的新型聚合物涂层. 这种涂层增强了稳定性和导电性,在下一代应用中显著提高了电池性能.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- (Si) 阳极为下一代离子电池 (LIB) 提供高容量.
- 阳极由于体积膨胀和低导电性而遭受性能降低.
- 改善接口特性和导电性对于稳定的Si阳极至关重要.
研究的目的:
- 为LIBs开发一种用于创建稳定和导电性阳极的简单方法.
- 为了研究聚合物涂层对Si阳极的电化学性能的影响.
- 为了提高基于Si的阳极的循环稳定性和容量保留.
主要方法:
- 一种使用低温 (≤400°C) 聚二硫酸 (PSS) 的单 Pyrolysis 方法.
- 用金属进行化学蚀刻,以产生多孔的微米 (por-mSi).
- 在PSS衍生层和Si表面之间形成Si-C/Si-O-C共价键.
- 用聚氨酸 (PANI) 涂抹PSS移植的por-mSi,以提高导电性.
主要成果:
- 通过PSS热解在Si表面形成的薄碳层改善了接口特性.
- 用PSS移植的por-mSi@PSS/PANI阳极在100个循环后在0.1 A g-1下表现出高可逆容量~1500 mAh g-1的高可逆容量.
- 双层涂层 (基和PANI) 增强了阳极稳定性,并促进了Li+离子运输.
结论:
- 用聚合物修改的阳极,特别是por-mSi@PSS/PANI,在先进的LIB应用中显示出显著的前景.
- 开发的方法提供了一种有效的策略,以克服阳极的局限性.
- 这种方法有助于开发高性能储能解决方案.
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