High-Performance Aluminum-Ion Battery with CuS@C Microsphere Composite Cathode
High-Performance Aluminum-Ion Battery with CuS@C Microsphere Composite Cathode
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DOI：
10.1021/acsnano.6b06446
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发表时间：
2017-01-01
期刊：
影响因子：
17.1
通讯作者：
Fang, Dai-Ning
中科院分区：
文献类型：
--
作者：
Wang, Shuai;Jiao, Shuqiang;Fang, Dai-Ning
铝离子电池以其低成本、丰富的资源、安全性能等优势，被认为是下一代储能电池在大规模能源应用中的最有前途的候选材料。以纳米片组成的硫化铜（CuS）三维分级微球为正极材料，以AlCl 3和1-乙基-3-甲基咪唑氯化物（[EMIm]Cl）组成的室温离子液体为电解液，制备了可充铝离子电池。微球电极铝离子电池的平均放电电压接近1.0VvsAl/AlCl 4-，在20 mA g（-1）下的可逆比容量约为90 mA h g（-1），循环100次后的库仑效率接近100%。这种显著的电化学性能归因于阴极材料的良好限定的纳米结构促进电子和离子转移，特别是对于具有大尺寸的氯铝酸盐离子，这对于铝离子电池应用是期望的。
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.