Liu Jiequn, Zhong Shengkui, Chen Qingrong, Meng Luchao, Wang Qianyi, Liao Zhijian, Zhou Jian
School of Marine Science and Technology, Hainan Tropical Ocean University, Sanya, China.
School of Iron and Steel, Soochow University, Suzhou, China.
Front Chem. 2020 Dec 15;8:626388. doi: 10.3389/fchem.2020.626388. eCollection 2020.
Compositing with metal oxides is proved to be an efficient strategy to improve electrochemical performance of anode material LiTiO for lithium-ion batteries. Herein, spherical LiTiO/NiO composite powders have been successfully prepared via a spray drying method. X-ray diffraction and high-resolution transmission electron microscopy results demonstrate that crystal structure of the powders is spinel. Scanning electron microscopy results show that NiO uniformly distributes throughout LiTiO matrix. It is found that compositing with NiO increases both discharge platform capacity and rate stability of LiTiO. The as-prepared LiTiO/NiO (5%) exhibits a high initial discharge capacity of 381.3 mAh g at 0.1 C, and a discharge capacity of 194.7 mAh g at an ultrahigh rate of 20 C.
与金属氧化物复合被证明是提高锂离子电池负极材料LiTiO电化学性能的有效策略。在此，通过喷雾干燥法成功制备了球形LiTiO/NiO复合粉末。X射线衍射和高分辨率透射电子显微镜结果表明，粉末的晶体结构为尖晶石。扫描电子显微镜结果表明，NiO均匀分布在整个LiTiO基体中。发现与NiO复合提高了LiTiO的放电平台容量和倍率稳定性。所制备的LiTiO/NiO（5%）在0.1 C时具有381.3 mAh g的高初始放电容量，在20 C的超高倍率下具有194.7 mAh g的放电容量。
