碳电极浆料作为阴极材料的快速充放电铝离子电池

Rapid rechargeable aluminum-ion batteries with carbon electrode paste as a cathode material

[EMIM]Cl基铝离子电池是一种具有前景的储能器件。由于其能量密度高、价格低廉、安全性高等特点有望成为下一代储能体系。本工作介绍了一种原本用于钙钛矿太阳能电池丝网印刷技术的可高倍率充放电的低温导电碳电极浆料,可在1000 mA/g的电流密度下,实现快速充放电,比容量保持在75 mAh/g左右,其充电倍率可达12 C。通过光学显微镜、扫描电子显微镜(SEM)、X射线衍射(XRD)以及比表面积分析等表征手段,对低温导电碳电极浆料、天然石墨片以及石墨烯作为阴极材料所组装的铝离子电池的性能进行了比较和分析,发现快速充放电主要是由于其特殊的表面形貌以及较大的比表面积所导致的。通过X射线衍射等测试也可证明低温导电碳电极浆料作为阴极材料的比容量高于其他阴极材料。实现了高充放电电流密度的铝离子电池。

The Cl-based aluminum-ion battery is a promising energy storage technology.The aluminum-ion battery is expected to become the next-generation energy storage system because of its high energy density,low price,and high safety.In this study,a rapid rechargeable low-temperature conductive carbon electrode paste was introduced,which was initially used in the screen printing technology of perovskite solar cells,can achieve rapid charge and discharge at a current density of 1000 mA/g,and exhibits specific capacities of 75 mAh/g.Its charging rate can reach 12 C.The performance of the aluminum-ion battery assembled with low-temperature conductive carbon electrode slurry,natural graphite flake,and graphene as cathode materials was compared and analyzed using optical microscopy,scanning electron microscopy,X-ray diffraction,and specific surface area analyses.It was found that the rapid charge-discharge was mainly due to its unique surface morphology and small specific surface area.The specific capacity of low-temperature conductive carbon electrode paste as a cathode material was also proved to be higher than that of other cathode materials by X-ray diffraction and other tests.This cathode material realized the aluminum-ion battery with high charge-discharge current density.