铁化物流电池在-10°C下稳定运行
Liping Zhi1,2, Chenyi Liao3, Pengcheng Xu1,4
1Division of Energy Storage, Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China.
Angewandte Chemie (International ed. in English)
|September 6, 2024
概括
一种基于的新型电解质显著提高了酸在性电池中的可溶性,从而实现更高的能量密度和在低温下更好的性能. 这一进步解决了当前储能解决方案的关键局限性.
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:
- 性铁/铁化流电池提供具有高电化学活性,具有成本效益的能量存储.
- 关键的局限性包括低能量密度和低温下性能差,这是由于铁化物沉造成的.
- 现有的氧化 (NaOH) 或氧化 (KOH) 电解质具有有限的铁化溶解度 (在25°C时约0.4M).
研究的目的:
- 开发一种支持电解质,增强铁酸的溶解性,提高温度适应性.
- 研究氧化 (LiOH) 对铁酸溶解度和电池性能的影响.
- 为了展示使用新型电解质的高性能铁化物流电池.
主要方法:
- 使用基于的支持电解质,特别是氧化 (LiOH).
- 研究了基电解质对铁酸的离子双极相互作用和极化效应.
- 制造并测试了一种-铁酸流电池,使用增强的加索利特.
主要成果:
- 获得显著增强的铁化物溶解度:在25°C时达到1.7M,在-10°C时达到0.8M.
- 演示了一种-铁酸流电池,在25°C时的充电能量为~72 Wh L-1 阴解体.
- 显示稳定的循环性能:在25°C下~4200个循环,在-10°C下~800个循环.
结论:
- 这种基于的支电解质有效地克服了传统的铁酸阴解质的可溶性和温度限制.
- 这一突破使流动电池在更广泛的温度范围内具有更高的能量密度和强大的性能.
- 开发的-铁酸流电池显示了可靠和高效的大规模能源存储的前景.
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