title: High-Performance Aluminum-Ion Battery with CuS@C Microsphere Composite Cathode.
abstract: On the basis of low-cost, rich resources, and safety performance, aluminum-ion batteries have been regarded as a promising candidate for next-generation energy storage batteries in large-scale energy applications. A rechargeable aluminum-ion battery has been fabricated based on a 3D hierarchical copper sulfide (CuS) microsphere composed of nanoflakes as cathode material and room-temperature ionic liquid containing AlCl3and 1-ethyl-3-methylimidazolium chloride ([EMIm]Cl) as electrolyte. The aluminum-ion battery with a microsphere electrode exhibits a high average discharge voltage of ∼1.0 V vs Al/AlCl4-, reversible specific capacity of about 90 mA h g-1at 20 mA g-1, and good cyclability of nearly 100% Coulombic efficiency after 100 cycles. Such remarkable electrochemical performance is attributed to the well-defined nanostructure of the cathode material facilitating the electron and ion transfer, especially for chloroaluminate ions with large size, which is desirable for aluminum-ion battery applications.
authors.affiliation: State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing , Beijing, 100083, People's Republic of China.
authors.forename: Shuai
authors.initials: S
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing , Beijing, 100083, People's Republic of China.
authors.forename: Shuqiang
authors.identifier: 0000-0001-9600-752X
authors.initials: S
authors.lastname: Jiao
authors.affiliation: State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing , Beijing, 100083, People's Republic of China.
authors.forename: Junxiang
authors.initials: J
authors.lastname: Wang
authors.affiliation: Institute of Advanced Structure Technology, Beijing Institute of Technology , Beijing 100081, People's Republic of China.
authors.forename: Hao-Sen
authors.initials: HS
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing , Beijing, 100083, People's Republic of China.
authors.forename: Donghua
authors.initials: D
authors.lastname: Tian
authors.affiliation: State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing , Beijing, 100083, People's Republic of China.
authors.forename: Haiping
authors.initials: H
authors.lastname: Lei
authors.affiliation: Institute of Advanced Structure Technology, Beijing Institute of Technology , Beijing 100081, People's Republic of China.
authors.forename: Dai-Ning
authors.initials: DN
authors.lastname: Fang
keywords: aluminum-ion battery; cathode material; copper sulfide; microsphere