磷掺杂二氧化钛空心球锂离子电池负极材料的制备及其性能  

Synthesis and Performance of Phosphorus-doped TiO_(2)Hollow Microspheres for Lithium-ion Battery Anode

作　　者：张军[1] 文晓刚[1] Zhang Jun;Wen Xiaogang(College of Materials Science and Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学材料科学与工程学院,四川成都610065

出　　处：《广东化工》2022年第17期1-3,9,共4页Guangdong Chemical Industry

基　　金：中国国家自然科学基金(No.52072251)。

摘　　要：二氧化钛(TiO_(2))因其储量丰富、环境友好、性能稳定等特点,作为锂离子电池负极被广泛研究。但低的电子电导率阻碍了其实际的应用。本文通过水热法结合热处理工艺制备了磷掺杂的二氧化钛空心微球。其中空心结构提供了大的比表面,同时磷掺杂产生Ti能协同改善TiO_(2)导电性,因此,制得的空心微球其显示出改善的电化学性能。0.2 C电流密度下首次放电比容量为259.2 m Ah/g,5 C电流密度下循环500圈容量保持率达83%。Titanium dioxide(TiO_(2)) has been widely studying as the anode material of lithium-ion battery because of its abundant reserves,environmental friendly and stable properties.But its practical application is limited by the intrinsically low electronic conductivity.Herein,phosphorus doped titanium dioxide hollow microspheres(P-TiO_(2)) were synthesized via hydrothermal method combined with annealing process.The hollow structure obviously increases its specific surface areas,while the P-doping and thereby produced Tifacilitate the improvement of TiO_(2) conductivity,the as-synthesized P-TiO_(2) microspheres exhibited improved electrochemical performance.The initial discharge capacity of P-TiO_(2) hollow microsphere is 259.2 m Ah/g at a current density of 0.2 C(1C=335 m Ah/g),and the capacity retention efficiency can reach 83%after 500 continuous cycles at 5 C.

关 键 词：TiO_(2) 磷掺杂 锂离子电池 空心微球 水热法 

分 类 号：TQ152[化学工程—电化学工业]