高压催化剂用于高能量密度非水性再氧流电池的高压催化剂
Jack McGrath1, Rajeev K Gautam1, Xiao Wang1
1Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio, 45221-0172, United States.
Angewandte Chemie (International ed. in English)
|June 6, 2024
概括
一个新的有机氧化还原流电池 (RFB) 系统使用分子工程四甲衍生物作为高能量密度的阴解质. 这一进步有望实现高效的电网规模储能,具有出色的稳定性和高功率密度.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 电网规模的储能需要高能量密度的氧化还原流电池 (RFB).
- 与水系统相比,非水性RFB具有更高能量密度的潜力.
- 开发稳定和高性能的阴解质对于推进非水性RFB至关重要.
研究的目的:
- 为高能量密度非水性RFB开发一种新型有机阴解质.
- 为了提高四亚富 (TTF) 衍生物的可溶性和氧化还原潜力.
- 评估新的RFB系统的性能和稳定性.
主要方法:
- 通过将聚乙烯甘醇 (PEG) 和 (PerF) 基组结合起来,对四亚富华烯 (TTF) 衍生物 (PEG3/PerF) -TTF进行分子工程.
- 使用循环电压计进行电化学表征.
- 流电池测试以评估循环稳定性,容量保留,库伦比效率,功率密度和运行能量密度.
主要成果:
- 该 (PEG3/PerF) -TTF 阴解体表现出高电池电压 (3.56 V 和 3.92 V) 的金属阳极.
- 卓越的循环稳定性被证明具有高容量保留率 (~94%和90%) 和平均库伦比克效率 (>98%).
- 流量电池实现了129 mW/cm2的高功率密度和72 Wh/L和96 Wh/L的运行能量密度.
结论:
- 分子工程 (PEG3/PerF) -TTF是非水性RFB的有希望的高能量密度阴解体.
- 协同分子设计方法有效地提高了可溶性和氧化还原潜力.
- 该RFB系统显示了高效和可持续的长期电网规模储能的巨大潜力.
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