Tang Haoqing, Liu Tao, Tang Zhiyuan
College of Materials Science and Engineering, Hebei University of Engineering, Handan, Hebei 056038, PR China.
Department of Applied Chemistry, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China.
Dalton Trans. 2019 Aug 28;48(32):12303-12314. doi: 10.1039/c9dt02320h. Epub 2019 Jul 25.
ZnO materials with multidimensional stereoscopic morphologies were synthesized via a one-step solvothermal process with water, ethanol and acetone as solvents. In this work, well-prepared ZnO was used as a Zn source for preparing pristine LiZnTiO anode materials for the first time by a facile solid-state method. The resulting LiZnTiO electrode material with rice-shaped ZnO as the zinc source (LZTO-E) possessed a smaller particle size and larger specific surface area, which were conducive to increase the electrochemical reaction area. Impressively, the LZTO-E electrode showed an excellent electrochemical performance with large discharge capacity (253.4 mA h g at 100 mA g) and good cycling stability (175 mA h g, 133.4 mA h g, and 115.0 mA h g at 1000 mA g, 2000 mA g, and 5000 mA g after 500 cycles, respectively). This superior electrochemical performance of the as-synthesized LiZnTiO was attributed to the specific microtopography of ZnO.
以水、乙醇和丙酮为溶剂,通过一步溶剂热法合成了具有多维立体形态的ZnO材料。在这项工作中,首次采用简便的固态法,将制备良好的ZnO用作制备原始LiZnTiO负极材料的锌源。所得以稻状ZnO为锌源的LiZnTiO电极材料(LZTO-E)具有较小的粒径和较大的比表面积,有利于增加电化学反应面积。令人印象深刻的是,LZTO-E电极表现出优异的电化学性能,具有大放电容量(在100 mA g下为253.4 mA h g)和良好的循环稳定性(在500次循环后,在1000 mA g、2000 mA g和5000 mA g下分别为175 mA h g、133.4 mA h g和115.0 mA h g)。所合成的LiZnTiO的这种优异电化学性能归因于ZnO的特定微观形貌。