以三氧化钼、二水合草酸为原料，通过简单的溶剂热法制备了MoO_3-x锂离子电池负极材料。采用XRD、TG、SEM、HR-TEM等方法对MoO_3-x样品的化学组成、结构与形貌进行了表征，并对MoO_3-x进行电化学性能测试。结果表明，该材料呈现花状结构，形貌均一，具有氧缺陷结构。MoO_3-x作为负极材料应用于锂离子电池时展示出极好的电化学性能：在电流密度为2 A/g的条件下，该材料的首圈充/放电比容量分别达到978.6 mAh/g和1 760 mAh/g。具有良好的循环稳定性；在5 A/g的条件下进行测试时，稳定循环1 000圈后，可逆放电比容量仍旧保持在490 mAh/g。

MoO_3-x cathode materials are synthesized via a simple solvothermal method,with molybdenum trioxide and oxalic acid dihydrate as raw materials.XRD,TG,SEM,HR-TEM and other methods are used to study the chemical composition,structure and morphology of the sample,and the electrochemical performance of the sample is tested also.Based on the results,the flower-like MoO_3-x,which possesses oxygen vacancies structure,has a uniform morphology.The oxygen vacancies results in a large interlayer spacing that enhance faster charge storage kinetics.Moreover,it can maintain the structure stabilities during the process of insertion and removal of Li ions.And flower-like structure of the sample can accommodate the volume expansion during long cycle.Herein,MoO_3-x as anode materials for lithium ion battery displays excellent electrochemical performance with good rate capability,long cycling life and high reversible discharge capacity.Under a current density of 2 A·g^-1,the first cycle specific charge and discharge capacities of the material is 978.6 mAh·g^-1 and 1,760 mAh·g^-1 respectively.Under a current density of 5 A·g^-1,its reversible discharge specific capacity maintains at 490 mAh·g^-1 after 1 000 cycles of stable circulation.

李春晓(1992-),男,硕士研究生,研究方向为纳米材料的制备及电池性能研究,lcxhyy@sina.com