碳包覆二氧化钛材料的制备及储钠性能研究  

Preparation of carbon-coated titanium dioxide materials and sodium storage performance study

作　　者：雅兰钧 高宇 李敏[1] 孙雪姣[1] Ya Lanjun;Gao Yu;Li Min;Sun Xuejiao(Inner Mongolia University of Science and Technology,Baotou 014010)

机构地区：[1]内蒙古科技大学,包头014010

出　　处：《化工新型材料》2024年第S02期262-264,271,共4页New Chemical Materials

基　　金：内蒙古科技大学基本科研业务费专项资金项目(2023QNJS062)。

摘　　要：TiO_(2)因为具有稳定性好和价格低廉等优点,被广泛用于储能系统中,被认为是具有潜力的钠离子电池负极材料。但是,由于TiO_(2)本身的电导率差,导致其电化学性能不佳。采用水热法制备了碳包覆TiO_(2)(TiO_(2)@C)复合材料,碳包覆能够实现优异的电化学稳定性、循环可逆性和比容量的提升。将TiO_(2)@C复合材料作为钠离子电池负极进行了测试,在0.1A/g的条件下循环70圈后,依然能保持99.5%的库仑效率。此项研究为钠离子电池负极材料的规模化生产提供了极具潜力的策略。TiO_(2)is widely used in energy storage systems because of its advantages such as excellent stability and low price,and is considered as a potential anode material for sodium-ion batteries.However,the poor conductivity of TiO_(2)results in suboptimal electrochemical performance.In this paper,carbon-coated TiO_(2)(TiO_(2)@C)composites were prepared by a hydrothermal method,and the carbon coating was able to achieve excellent electrochemical stability,cycle reversibility,and specific capacity enhancement.The TiO_(2)@C composites were tested as an anode for sodium-ion batteries and maintained 99.5%Coulombic efficiency after 70 cycles at 0.1A/g.This research presents a promising strategy for the large-scale production of anode materials for sodium-ion batteries.

关 键 词：钠离子电池 负极材料 碳包覆 循环稳定性 

分 类 号：TQ152[化学工程—电化学工业]