期刊
ACS NANO
卷 11, 期 1, 页码 469-477出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.6b06446
关键词
copper sulfide; microsphere; cathode material; aluminum-ion battery
类别
资金
- Fundamental Research Funds for the Central Universities [FRF-TP-15-002C1]
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) micro sphere composed of nanoflakes as cathode material and room-temperature ionic liquid containing AlCl3 and 1-ethyl-3-methylimidazolium chloride ([EMIm]Cl) as electrolyte. The aluminum-ion battery with a microsphere electrode exhibits a high average discharge voltage of similar to 1.0 V vs Al/AlCl4-, reversible specific capacity of about 90 mA h g(-1) at 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.
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