核桃状TiO_(2)中空颗粒应用于锂硫电池的研究  

Walnut-like TiO_(2)Hollow Particles for Lithium-Sulfur Batteries

作　　者：宁大泽 孙洪广[1] NING Daze;SUN Hongguang(College of Polymer Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,China)

机构地区：[1]青岛科技大学高分子科学与工程学院,山东青岛266042

出　　处：《青岛科技大学学报(自然科学版)》2025年第2期62-68,共7页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：山东省自然科学基金博士基金项目(ZR2018BEM037).

摘　　要：锂硫电池(LiSB)凭借其超高的理论容量和高的经济效益,成为未来最有竞争力的电池系统之一。但硫(S)正极的巨大体积膨胀和多硫化物(LiPSs)的穿梭效应使得锂硫电池的应用受到阻碍。使用一种纤维状的SiO_(2)作为模板,利用硬模板法简便地合成了核桃状TiO_(2)中空颗粒(WHTiO_(2))。随后,WHTiO_(2)与硫复合制备锂硫电池正极,以通过物理限制及化学吸附来削弱穿梭效应。在之后的电化学性能测试中,与C正极相比,WHTiO_(2)正极表现出了超高的比容量(0.1 C时为1210 mAh·g^(-1)),同时有着优异的容量保持率,电池性能明显提升。Lithium sulfur batteries(LiSB)have become one of the most competitive batteries system in the future.However,the huge volume expansion of sulfur(S)cathodes and the shuttle effect of polysulfides(LiPSs)hinder the application of lithium-sulfur batteries.Herein,a fibrous SiO_(2)was used as a template to easily synthesize walnut-like TiO_(2)hollow particles(WHTiO_(2))by a hard template method.Subsequently,WHTiO_(2)was compounded with sulfur to prepare a cath-ode to weaken the shuttle effect through physical confinement and chemical adsorption.In the subsequent electrochemical performance tests,In the subsequent electrochemical performance tests,compared with the C cathodes,the WHTiO_(2)cathodes exhibited an ultra-high specific capacity(1210 mAh·g^(-1)at 0.1 C),and the capacity retention rate is significantly improved,the battery performance is significantly improved.

关 键 词：锂硫电池 二氧化钛 纳米颗粒 穿梭效应 

分 类 号：TB321[一般工业技术—材料科学与工程] TM911.3[电气工程—电力电子与电力传动]