无机有机混合多功能固体电解质间相层,用于无树的金属阳极
Pei Liu1, Licheng Miao1, Zhiqin Sun1
1Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University, Tianjin, 300071, China.
Angewandte Chemie (International ed. in English)
|October 5, 2023
概括
研究人员开发了一种新型无机/有机混合层 (IOHL-Na),用于为金属阳极创建稳定的固体电解质介相 (SEI). 这种持久的SEI层使得无石的运行成为可能,并提高电池的长期性能.
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:
- 一个稳定的固体电解质介相 (SEI) 对于无树的金属阳极和高性能电池至关重要.
- 在高电流密度的长时间循环中保持SEI完整性仍然是一个重大挑战.
研究的目的:
- 开发一个具有无机/有机混合结构 (IOHL-Na) 的集成多功能SEI层,以提高金属阳极的耐用性.
- 通过解决与SEI相关的问题来提高电池的稳定性和性能.
主要方法:
- 制造一个无机/有机混合SEI层 (IOHL-Na).
- 评估SEI属性,包括机械强度,性和离子导电性.
- 在高电流密度和长时间循环下对称电池和Na-O2电池的测试.
主要成果:
- 无机成分提供了高机械强度和性,优化了离子导电性,并抑制了树突石的形成.
- 有机成分形成了密集的弹性膜,防止SEI在体积变化时断裂和分层.
- 对称电池在2000小时内表现出稳定的循环运行,低压歇斯底里 (15.8 mV) 在4 mA cm−2.2.
- Na-O2电池表现出特殊的长期稳定性和容量保留.
结论:
- IOHL-Na方法成功地为金属阳极构建了一个耐用的SEI层.
- 这一战略为开发无树金属阳极和高性能电池提供了一个有前途的途径.
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