普鲁士蓝模拟的超长循环,通过水性离子电池的平衡电解质实现
Jiahe Liu1,2, Cheng Yang1, Bo Wen1,2
1Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China.
Small (Weinheim an der Bergstrasse, Germany)
|July 17, 2023
概括
一种新的平衡电解质策略增强了水性离子电池的基于的普鲁士蓝色模拟阴极,实现了超过10,000个周期的长期,低成本的能量存储.
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:
- 水性离子电池 (SIB) 对大规模储能充满希望.
- 基于的普鲁士蓝色类似物 (PBA) 具有高容量,但由于水位不平衡,其周期寿命较差.
- 缺乏稳定的阴极材料限制了SIB的发展.
研究的目的:
- 制定一种策略,以改善水性SIB中基于的PBA的循环寿命.
- 引入平衡电解质来平衡水补充和攻击.
- 为了证明这种战略对基PBA的普遍性.
主要方法:
- 引入不同比例的辅溶剂 (CS) 均衡电解质 (xCS).
- 在开发的电解质中对KMnHCF阴极材料进行电化学测试.
- 使用KMnHCF阴极和NaTi2(PO4) 3阳极制造和测试完整的SIB.
- 与其他基于的PBA (NaMn0.8Fe0.2HCF和NaMnHCF) 验证平衡电解质概念.
主要成果:
- KMnHCF阴极与平衡电解质实现了10,000个循环,显著提高了稳定性.
- 完整的SIB显示了7,000个循环,表现出色,包括在低温下.
- 平衡电解质概念证明了对多种基于的PBA材料的有效性.
结论:
- 平衡电解质策略有效地解决了水性SIB中的水失衡问题.
- 基于的PBA与平衡电解质配对时,为低成本,长寿命的SIB提供了可行的途径.
- 这种方法显示出在储能方面的实际应用的巨大潜力,尤其是在苛刻的环境中.
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