嵌入在V2O5·nH2O中的铁的拓化学行为,具有较弱的键,增强了离子储存
Zilong Zhang1, Zhanming Gao1, Tianming Lv1
1School of Chemistry, Dalian University of Technology, Dalian 116024, PR China.
Journal of colloid and interface science
|May 25, 2024
概括
嵌入铁素的化氧化 (Fer/VOH) 显著提高了水性离子电池 (AAIB) 的性能. 这种新的阴极材料提高了离子储存能力和效率,为电池技术提供了有前途的进步.
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 (AAIB) 正因其可持续性和安全性而受到关注.
- 开发高性能阴极材料对于推进AAIB技术至关重要.
- 氧化物被探索为正极材料,但在容量和效率方面面临挑战.
研究的目的:
- 合成和评估嵌入铁素的化氧化 (Fer/VOH) 作为AAIBs的阴极材料.
- 为了研究铁素合并对氧化的结构和电化学效应.
- 为了提高氨离子储存能力,效率和AAIB的循环稳定性.
主要方法:
- 合成嵌入铁的水合瓦纳氧化物 (Fer/VOH).
- 铁/VOH作为AAIB中的阴极的电化学表征.
- 分析由于铁集成造成的结构变化,包括层间间距和氧气空缺.
主要成果:
- 铁/VOH的高特异容量为313 mAh/g,0.2 A/g,是AAIB中报告的氧化物中最高的.
- 铁的结合扩大了层间的间距,减少了层间的力,并创造了氧气空缺,改善了离子扩散.
- 铁/VOH表现出极好的循环稳定性,在2000个循环后在2 A/g下保持89 mAh/g (54.8%的保留率).
结论:
- 铁/VOH是水性离子电池的高效阴极材料.
- 铁嵌入成功地通过优化离子间隔和减少结合来提高电化学性能.
- 这种方法提供了一种新的策略,通过电子丰富物种集成来改进基于氧化瓦纳的阴极.
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