Citation: ZHEN Xu, GUO Xue-Jing. Synthesis and Lithium Storage Performance of Three-Dimensional Mesostructured ZnCo2O4 Cubes[J]. Acta Physico-Chimica Sinica, ;2017, 33(4): 845-852. doi: 10.3866/PKU.WHXB201612222
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Novel three-dimensional (3D) mesostructured ZnCo2O4 cubes are prepared through a convenient and practical hydrothermal route combined with an annealing treatment. The as-prepared ZnCo2O4 cubes range from 3-4 μm in size, and are composed of a large number of nanoparticles and pores. According to N2 adsorption-desorption measurements, the as-synthesized ZnCo2O4 cubes have a high BET surface area (41.4 m2·g-1) and mesoporous (6.32 nm) nature. Lithium ion batteries (LIBs) are assembled using the as-prepared ZnCo2O4 nanomaterial and metallic lithium as the anode and the cathode, respectively, and their lithium storage performance is investigated. The electrode material exhibits highly reversible lithium storage capacity and strong cycling stability at high current density for 100 cycles. More importantly, the ZnCo2O4 cube electrode still presents a relatively high specific capacity at high rate. The excellent lithium storage performance is attributed to the novel structure of the 3D mesostructured cubes, which can facilitate Li+ diffusion, increase electrode/electrolyte contact area, and endure volume changes the during Li+ insertion/extraction process.
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