3D porous reduced graphene cathode and non-corrosive electrolyte for long-life rechargeable aluminum batteries  

作　　者：Xueying Zheng Yong Xie Fei Tian Danni Lei Chengxin Wang 

机构地区：[1]State Key Laboratory of Optoelectronic Materials and Technologies,School of Materials Science and Engineering,Sun Yat-Sen(Zhongshan)University,Guangzhou 510275,China

出　　处：《Energy Materials and Devices》2024年第2期50-60,共11页能源材料与器件（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.52222213,U23A20572);the Fundamental Research Funds for the Central Universities of China(Grant No.22lgqb01).

摘　　要：Owing to their high volumetric capacity,low cost and high safety,rechargeable aluminum batteries have become promising candidates for energy applications.However,the high charge density of Al^(3+)leads to strong coulombic interactions between anions and the cathode,resulting in sluggish diffusion kinetics and irreversible collapse of the cathode structure.Furthermore,AlCl_(3)-based ionic liquids,which are commonly used as electrolytes in such batteries,corrode battery components and are prone to side reactions.The above problems lead to low capacity and poor cycling stability.Herein,we propose a reduced graphene oxide(rGO)cathode with a three-dimensional porous structure prepared using a simple and scalable method.The lamellar edges and oxygen-containing group defects of rGO synergistically provide abundant ion storage sites and enhance ion transfer kinetics.We matched the prepared rGO cathode with noncorrosive electrolyte 0.5 mol·L^(-1) Al(OTF)_(3)/[BMIM]OTF and Al metal to construct a high-performance battery,Al||rGO-150,with good cycling stability for 2700 cycles.Quasi-in-situ physicochemical characterization results show that the ion storage mechanism is codominated by diffusion and capacitance.The capacity consists of the insertion of Al-based species cations as well as synergistic adsorption of Al(OTF)_(x)^((3-x)+)(x<3)and[BMIM]+.The present study promotes the fundamental and applied research on rechargeable aluminum batteries.

关 键 词：rechargeable aluminum batteries reduced graphene oxide noncorrosive electrolyte 

分 类 号：TM9[电气工程—电力电子与电力传动]