闪光焦耳加热在几秒钟内合成层叠的氧化/石墨烯混合体,用于高性能水性离子电池
Xiaoxin Lv1, Aomen Yang1, Menglian Wang1
1Automotive Engineering Research Institute, Institute for Energy Research, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China.
ACS applied materials & interfaces
|September 18, 2024
概括
一种新的超快速合成方法为水性离子电池 (ZIB) 创建了高性能氧化物阴极. 这种快速的朱尔加热方法产生了具有出色容量和稳定性的VO2/V2O5复合材料,为高效的ZIB应用铺平了道路.
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:
- 氧化物是水性离子电池 (ZIB) 的有希望的阴极.
- 开发高性能氧化瓦纳阴极的经济有效和高效的合成方法对于工业应用至关重要.
- 现有的制备方法往往缺乏大规模生产所需的速度和效率.
研究的目的:
- 为基于氧化瓦纳的先进阴极开发一种简单,快速和具有成本效益的合成战略.
- 制造用于水性ZIB的复合阴极材料,具有增强的电化学性能.
- 为了研究结构-属性关系,控制合成的正极材料的性能.
主要方法:
- 商业V2O5粉末的闪光焦耳加热处理2.5秒.
- 一个由层叠的VO2/V2O5和类似石墨烯的碳纳米片组成的复合阴极的合成.
- 在水性ZIB中复合阴极的电化学表征,包括速率能力和长期循环稳定性测试.
主要成果:
- 合成的VO2/V2O5和类似石墨烯的碳纳米板复合阴极在0.2A g-1.0下表现出459 mA h g-1的容量.
- 实现了显著的周期稳定性,在1.0Ag-1下保持355.5mAhg-1在2500个周期后,在10Ag-1下保持169.5mAhg-1在10000个周期后.
- 增强的性能归因于加速的电荷转移和由于异构结构和碳纳米板减少的结构降解.
结论:
- 已经证明了一种独特的超快速和低成本的方法,用于制造ZIB的高性能氧化物复合阴极.
- 层叠的VO2 / V2O5异构结构,结合类似石墨烯的碳纳米板,显著提高了电化学性能和稳定性.
- 这种方法为水性离子电池的高效阴极的工业生产提供了一个有希望的途径.
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