A graphitized expanded graphite cathode for aluminum-ion battery with excellent rate capability  

作　　者：Xiaozhong Dong Hao Chen Haiwen Lai Liyong Wang Jiaqing Wang Wenzhang Fang Chao Gao 

机构地区：[1]MOE Key Laboratory of Macromolecular Synthesis and Functionalization,Department of Polymer Science and Engineering,Key Laboratory of Adsorption and Separation Materials&Technologies of Zhejiang Province,Zhejiang University,Hangzhou 310027,Zhejiang,China [2]Department of Materials Engineering,Taiyuan Institute of Technology,Taiyuan 030008,Shanxi,China [3]Hangzhou Gaoxi Technology Co.Ltd.,Hangzhou 310000,Zhejiang,China [4]Hebei Normal University for Nationalities,Chengde 067000,Hebei,China

出　　处：《Journal of Energy Chemistry》2022年第3期38-44,I0002,共8页能源化学（英文版）

基　　金：the support of the National Natural Science Foundation of China(51533008,51703194 and 21805242);the National Key R&D Program of China(2016YFA0200200);the Excellent Postdoctoral Special Fund of Zhejiang University for funding this research work。

摘　　要：Aluminum-ion battery(AIB)is very promising for its safety and large current charge–discharge.However,it is challenging to build a high-performance AIB system based on low-cost materials especially cathode&electrolyte.Despite the low-cost expanded graphite-triethylaminehydrochloride(EG-ET)system has been improved in cycle performance,its rate capability still remains a gap with the expensive graphene-alkylimidazoliumchloride AIB system.In this work,we treated the cheap EG appropriately through an industrial high-temperature process,employed the obtained EG3K(treated at 3000℃)cathode with AlCl_(3)-ET electrolyte,and built a novel,high-rate capability and double-cheap AIB system.The new EG3K-ET system achieved the cathode capacity of average 110 m Ah g^(-1)at 1 A g^(-1)with 18,000cycles,and retained the cathode capacity of 100 m Ah g^(-1)at 5 A g^(-1)with 27,500 cycles(fast charging of 72 s).Impressively,we demonstrated that a battery pack(EG3K-ET system,12 m Ah)had successfully driven the Model car running 100 m long.In addition,it was confirmed that the improvement of rate capability in the EG3K-ET system was mainly derived by deposition,and its capacity contribution ratio was about 53.7%.This work further promoted the application potential of the low-cost EG-ET AIB system.

关 键 词：Aluminum-ion battery Expanded graphite Triethylamine hydrochloride 

分 类 号：TQ127.11[化学工程—无机化工] TM912[电气工程—电力电子与电力传动]