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℃)cath-ode with AlCl3-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 mAh g-1 at 1 A g-1 with 18,000 cycles,and retained the cathode capacity of 100 mAh 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 mAh)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.

Xiaozhong Dong;Hao Chen;Haiwen Lai;Liyong Wang;Jiaqing Wang;Wenzhang Fang;Chao Gao

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;Department of Materials Engineering,Taiyuan Institute of Technology,Taiyuan 030008,Shanxi,China;Hangzhou Gaoxi Technology Co.Ltd.,Hangzhou 310000,Zhejiang,China;Hebei Normal University for Nationalities,Chengde 067000,Hebei,China

能源化学

[1]Xiaozhong Dong;Hao Chen;Haiwen Lai;Liyong Wang;Jiaqing Wang;Wenzhang Fang;Chao Gao-.A graphitized expanded graphite cathode for aluminum-ion battery with excellent rate capability)[J].能源化学,2022(03):38-44

triethylaminehydrochloride,alkylimidazoliumchloride,EG3K

graphitized,expanded,graphite,cathode,aluminum,battery,excellent,capability,Aluminum,AIB,very,promising,its,safety,large,current,discharge,However,challenging,build,high,performance,system,low,cost,materials,especially,electrolyte,Despite,ET,has,been,improved,still,remains,gap,expensive,graphene,In,this,work,treated,cheap,appropriately,through,industrial,temperature,process,employed,obtained,AlCl3,built,novel,double,new,achieved,capacity,average,mAh,cycles,retained,fast,charging,Impressively,demonstrated,that,pack,had,successfully,driven,Model,car,running,long,addition,was,confirmed,improvement,mainly,derived,by,deposition,contribution,ratio,about,This,further,promoted,application,potential

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