在碳酸盐电解质中进行空气稳定和无树的金属阳极循环的双层介面
A-Re Jeon1,2,3, Byeol Yi Han1, Minhyung Kwon1,2,3
1Energy Storage Research Center, Korea Institute of Science and Technology (KIST), 14 Gil 5 Hwarang-ro, Seongbuk-gu, Seoul, 02792, Republic of Korea.
Small (Weinheim an der Bergstrasse, Germany)
|June 17, 2024
概括
新的双层涂层保护金属阳极免受空气腐蚀,并提高电池循环稳定性. 这一进步使得更耐用和高性能的可充电电池成为可能.
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:
- 金属阳极具有高能量密度,但在常规电解质中受到空气反应性和不良循环稳定性的影响.
- 这些局限性,包括腐蚀和树突生长,阻碍了金属电池的广泛采用.
研究的目的:
- 为金属阳极开发一种保护性双层介相.
- 提高金属阳极对环境空气和碳酸盐电解质的抗腐蚀性和电化学稳定性.
主要方法:
- 将金属涂上含有甲基酸盐的聚氧底层.
- 将一个顶层聚乙烯碳酸 (PVEC) 植入聚氧化层上.
- 评估双层在抵抗潮湿空气和在电化学循环过程中防止树突生长方面的性能.
主要成果:
- 双层间相提供了一个高度均的涂层,优于单层涂层.
- 涂层的阳极有效地抵抗潮湿的空气 (46%的相对湿度),并防止树的形成.
- 在碳酸盐电解质中,在200个循环中实现了稳定的涂/剥离,极小的超电位增加.
结论:
- 双层相间设计成功地解决了金属阳极不稳定的挑战.
- 这种方法促进了可扩展生产的高压,长循环金属电池.
- 这项研究为推进下一代电池技术提供了一个有前途的战略.
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