在高性能水性离子电池的现场Fe替代的酸
Usman Ali1, Bingqiu Liu1, Hongfeng Jia1
1Faculty of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun, Jilin, 130024, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|September 15, 2023
概括
水性电池 (AKIB) 显示出储能方面的前景. 这项研究引入了一种新的铁替代六酸材料,该材料可显著改善电池循环和电网规模应用的速率性能.
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:
- 水性电池 (AKIB) 由于其环保性,安全性和可负担性,对电网规模的储能具有吸引力.
- 六化酸盐材料虽然有前途,但在实际应用中,其循环和速率性能不足.
研究的目的:
- 为AKIBs开发一个改进的六化酸阴极材料.
- 通过现场材料改造来提高AKIBs的电化学性能.
主要方法:
- 在室温下使用现场Fe替代策略合成一种新型K1.66Fe0.25Co0.75[Fe(CN) 6·0.83H2O (KFCHCF) 材料.
- 使用酸作为化剂用于Fe替代和控制离子度以优化材料性能.
- 使用KFCHCF阴极和PNTCDA阳极制造和测试一个完整的电池电池.
主要成果:
- KFCHCF阴极表现出极好的速率性能,在100和200 mA g-1下分别在400和1000个循环后保持97%和90.6%的容量.
- 整个电池保持了高容量保留 (≈74.93%和74.35%) 在高速率 (200和1000 mA g-1) 超过1000和>10,000周期,分别.
- 现场表征证实了在循环过程中高K离子可逆性和结构稳定性.
结论:
- 在六二酸盐中的Fe替代有效地增强K离子迁移并稳定晶体结构,从而在AKIB中获得优越的电化学性能.
- 开发的KFCHCF材料和合成方法显示了电网规模储能系统的巨大潜力.
- 这种方法适用于合成其他六基酸盐材料,用于先进的电池应用.
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