SDBS对水热合成Zn_2SnO_4纳米颗粒储锂性能的影响

以十二烷基苯磺酸钠(SDBS)为表面活性剂采用水热法合成了Zn_2SnO_4纳米颗粒,反应过程中添加和不添加SDBS会对样品产生影响。添加SDBS合成的样品颗粒粒径较小,约为70 nm,并且粒径分布均匀。将其用作锂离子电池的负极材料,在50 mA/g的电流密度下进行充放电循环,具有1 619 mAh/g的首次放电比容量,在50、100、200、400、600和1000 mA/g的电流密度下进行倍率性能测试,在各电流密度下循环5次后,材料的放电比容量分别为883、658、509、380、295、165 mAh/g,当电流密度重新返回50 mA/g时,电极仍具有716 mAh/g的比容量,各放电比容量均高于同条件下没有添加SDBS的样品的比容量。

Influence of SDBS on lithium storage performance of hydrothermal synthesized Zn2SnO4 nanoparticles

Sodium dodecyl benzene sulfonate (SDBS)-assisted Zn2SnO4 nanoparticles were successfully synthesized by a hydrothermal process using SDBS as surfactant.The sample was influenced with or without adding SDBS.Compared with the sample prepared without adding SDBS,the size of the sample ZTO-S decreased and the distribution of particle size were more uniform.As anodes for lithium ion batteries,the ZTO-S delivered an initial discharge capacity of 1 619 mAh/g at the current density of 50 mA/g.In rate performance test,after 5 cycles,the ZTO-S electrode delivered capacities of 883,658,509,380,295,165 mAh/g at 50,100,200,400,600 and 1 000 mA/g.When the current density was reset to 50 mA/g,ZTO-s still delivered a higher capacity of 716 mAh/g,exhibiting improved lithium storage performance.