通过高和的结合,为稳定的离子电池提供高电压六二烯酸二烯酸盐阴极
Junyi Dai1, Sha Tan2, Lifeng Wang1
1Hefei National Research Center for Physical Sciences at the Microscale, Department of Materials Science and Engineering, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei 230026, Anhui, China.
高的普鲁士蓝色类似物 (HE-PBA) 与提供了改进的离子电池阴极. 这一策略提高了工作电压和结构稳定性,以提高电池性能.
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:
- 普鲁士蓝色类似物 (PBA) 是有前途的离子电池 (SIB) 阴极,因为它们的开放框架和高容量.
- 然而,低工作电压和结构稳定性不佳限制了它们的实际应用.
- 现有的PBA在实现高压和长期循环稳定性方面面临着挑战.
研究的目的:
- 为SIBs开发一种新的正极材料,克服传统PBAs的局限性.
- 为了提高PBA阴极的工作电压和循环稳定性.
- 研究提高稳定性和性能背后的机制.
主要方法:
- 合成了一种含的高的普鲁士蓝色模拟阴极:K ((MnFeCoNiCu) [Fe ((CN) 6 (HE-K-PBA)).
- 采用同步子辐射X射线吸收光谱 (XAS),现场X射线光电子光谱 (XPS) 和现场拉曼光谱来研究反应机制.
- 利用有限元模拟来分析稳定机制和结构应变.
主要成果:
- 该HE-K-PBA阴极实现了高输出电压3.46V和可逆容量120.5mAhg-1在0.01Ag-1.1的可逆容量.
- 经过1.0 A g-1.1的1700个循环后,表现出极好的循环稳定性,容量保持率为90.4%.
- 有限元模拟证实,HE-K-PBA表现出减少的结构扭曲和应变,归因于稳定.
结论:
- 高和结合策略有效地提高了普鲁士蓝色模拟阴极的工作电压和循环稳定性.
- 开发的HE-K-PBA阴极显示了先进的离子电池应用的巨大潜力.
- 该研究提供了关于稳定PBA结构的见解,用于下一代能源存储.
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