单相固体溶液反应促进了离子储存在替代的单临床铁聚酸盐阴极中
Sharad Dnyanu Pinjari1, Purandas Mudavath1, Ravi Chandra Dutta2,3
1Department of Chemical Engineering, Indian Institute of Science Education and Research-Bhopal, Bhopal, Madhya Pradesh, 462066, India.
Small (Weinheim an der Bergstrasse, Germany)
|March 18, 2025
概括
研究人员开发了一种新的富含铁的NASICON阴极 (NaFe2-xInx(PO4)(MoO4)2) 用于离子电池. 兴奋剂增强了离子扩散和稳定性,克服了电压歇斯底里,改善了能量储存.
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 (NIB) 是离子电池的一个有希望的替代品.
- 高能量密度阴极对于NIB采用至关重要.
- 富含铁的纳西康具有潜力,但面临诸如电压歇斯底里等挑战.
研究的目的:
- 开发一种NASICON类型的阴极,为NIBs提供增强的性能.
- 为了研究兴奋剂对阴极特性的影响.
- 为了解决电压歇斯底里并改善离子扩散.
主要方法:
- 合成的NaFe2-xInx(PO4)(MoO4)2 (NFIPM) 纳西康的阴极.
- 磁敏度 (M-T) 和电子磁共振 (EPR) 的测量.
- 第一原理计算和现场X射线衍射 (XRD).
主要成果:
- 在NFIPM中使用兴奋剂可以产生稳定的单相固体溶液.
- 观察到增强的离子扩散和减少的能量带隙.
- 优化的NFIPM10显示在0.1C时111.85mAhg-1容量,在2C时800周期.
- 在现场XRD证实了循环过程中的可逆结构稳定性.
结论:
- 战略性兴奋剂有效地提高了离子扩散和电化学性能.
- NFIPM展示了作为离子电池的高性能阴极材料的潜力.
- 这项工作突出了兴奋剂在克服基于NASICON的阴极限制中的作用.
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