控制渐变度的控制 普鲁士白色阴极用于高性能离子电池
Xuanjin Chen1, Chunxiu Hua2, Kaicheng Zhang1
1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China.
ACS applied materials & interfaces
|September 27, 2023
概括
研究人员为高性能离子电池 (PIB) 开发了渐变度的普鲁士白色. 这些材料提供了更好的容量和稳定性,解决了K+存储方面的挑战,为一个有前途的LIB替代品提供了解决方案.
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:
- 离子电池 (PIB) 是离子电池 (LIB) 的经济有效替代品,因为资源丰富.
- 在PIB开发中的挑战包括找到合适的阴极材料,因为K+的离子半径和质量更大.
- 普鲁士白色 (PWs) 提供了一个有前途的框架,但由于离子循环期间的结构不稳定性,产能减弱.
研究的目的:
- 为PIBs设计具有增强结构稳定性和电化学性能的普鲁士白色阴极材料.
- 研究渐变元素度对离子储存能力的协同效应.
- 为高性能储能设备开发先进的PW提供可行的战略.
主要方法:
- 可控制梯度度KxFe[Fe(CN) 6·zH2O颗粒的简单的共降合成.
- 电化学表征以评估可逆容量,循环稳定性和速率性能.
- 结构分析以确认在循环过程中梯度PWs的完整性和稳定性.
主要成果:
- 梯度度PWs表现出高可逆容量109.8mAhg-1在100mAg-1的高可逆容量.
- 在200个循环后实现了77.8%的优异容量保留,表明了良好的循环稳定性.
- 梯度结构,高Mn内部和高FeNi外部,有效地减少容量损失和减轻体积变化.
结论:
- 开发的梯度度PW显示出优越的结构完整性和电化学性能,用于离子储存.
- 这种方法为制造下一代PIB的稳定和高性能普鲁士白种提供了一个有前途的战略.
- 这些发现有助于克服先进离子电池技术发展的关键挑战.
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