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一个纳米工程的氧化瓦纳复合物作为水性离子混合电池的高性能阳极

Ailun Huang¹, Zhiyin Yang¹, Xueying Chang¹

¹Department of Chemistry and Biochemistry, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA.

Nanoscale horizons

|April 29, 2024

概括

研究人员开发了一种新的V2O5/石墨烯阳极,用于水性离子电池 (LIB). 这种伪容量材料具有高容量和出色的性能,推进了安全高效的储能解决方案.

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:

水性离子电池 (LIB) 由于安全性和成本,对静止式储能具有吸引力.
目前的局限性包括缺乏具有高特异性容量的阳极材料.
开发先进的阳极材料对于提高LIB性能至关重要.

研究的目的:

合成一种新的伪容量V2O5/石墨烯复合物作为水性LIBs的高性能阳极.
研究V2O5/石墨烯阳极的电化学特性和电荷储存机制.
为了评估使用开发的阳极的完整细胞的性能.

主要方法:

使用激光写字和烧焦制造V2O5/石墨烯复合材料.
使用三电极测量进行电化学表征.
用LiMn2O4阴极组装和测试一个全水性LIB电池.

主要成果:

V2O5/石墨烯阳极实现了158 mA hg-1.1的特定容量.
整个电池的容量在C/6时为151mAh (g阳极) -1和3C时为107mAh (g阳极) -1的容量.
混合电池实现了高功率 (650 W kg-1) 和能量密度 (81.5 W h kg-1).

结论:

新型V2O5/石墨烯复合物作为水性LIB的高度功能性的伪电容阳极.
表面控制的电荷存储机制有助于显著的速率性能.
这一战略使得高性能,安全,大规模的水性离子储能成为可能.

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