K3 v2 (Po4 ) 3 /C作为一种新的高压阴极材料,用于含水盐电解质的离子电池
Fan Qiao1, Junjun Wang1, Ruohan Yu1
1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China.
Small methods
|October 6, 2023
概括
一种新的正极材料,K3V2(PO4) 3 / C,为水性离子电池 (ACIB) 提供高电压和长寿命. 这一突破推动了ACIB技术的发展,克服了阴极开发的局限性,以实现更安全,更丰富的能量存储.
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 (ACIB) 提供更高的安全性,并利用丰富的资源.
- ACIBs的发展受到能够容纳大型双价Ca2+离子的高压阴极材料稀缺的限制.
研究的目的:
- 引入K3V2(PO4) 3 / C (KVP / C) 作为ACIBs的新型聚离子酸盐阴极材料.
- 研究KVP/C在ACIB中的电化学性能和储存机制.
主要方法:
- 对KVP/C作为ACIB中的阴极材料进行电化学测试.
- 现场X射线衍射,现场传输电子显微镜和X射线光电子光谱学,以阐明储存机制.
- 使用KVP/C. 构建和测试一个完整的ACIB单元.
主要成果:
- KVP/C的高工作电压为3.74V,而Ca2+/Ca的高工作电压为102.4mAhg-1.
- 该材料具有特殊的长期稳定性,在500 mA g-1下保持超过6000个周期的容量.
- 储存机制涉及固体溶液和双相反应的组合.
- 一个带有KVP/C阴极的全电池实现了80.2 mAh g-1容量和200个周期的稳定性.
结论:
- KVP/C是一种有前途的高压阴极材料,可用于推进水性离子电池技术.
- 基于的酸盐显示出未来ACIB开发的潜力,提高了储能前景.
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