摘要
采用简单湿化学合成了在单分散MXene中嵌入了聚苯胺包覆的硅纳米颗粒(Si@NC@Ti_(3)C_(2)T_(x))。当用作锂离子电池(LIBs)的负极材料时,该复合材料展现出卓越的电化学性能。结果表明,在1 A/g的高电流密度下,经过300次循环后,Si@NC@Ti_(3)C_(2)T_(x)复合材料能够提供767.2mA·h/g的可逆比容量。此外,该材料在电流密度从0.1~2 A/g时表现出优异的倍率性能,具有25.3%的容量保持率。Si@NC@Ti_(3)C_(2)T_(x)优异的电化学性能可归因于较低的电荷转移电阻、良好的电极动力学以及更短的Li^(+)扩散距离。
Polyaniline-coated silicon nanoparticles embedded in monodisperse MXene(Si@NC@Ti_(3)C_(2)T_(x)) were synthesized by a simple wet chemical method.When used as anode materials of lithium ion batteries(LIBs),it demonstrates outstanding electrochemical property.The results display that the Si@NC@Ti_(3)C_(2)T_(x) can deliver a high reversible specific capacity of 767.2 m A·h/g after 300 cycles at the high current density of 1 A/g,when the current density increases from 0.1 A/g to 2 A/g,it shows excellent rate properties and the capacity retention rate is 25.3%.The superior electrochemical property could be ascribed to the lower charge-transfer resistance,better electrode kinetics and shorter Li^(+) diffusion distance.
作者
孙泽坤
余茂鑫
林志雅
Sun Zekun;Yu Maoxi;Lin Zhiya(College of Mathematics and Physice,Ningde Normal University,Ningde Fujian 352100,China;College of Chemistry and Materials,Ningde Normal University,Ningde Fujian 352100,China)
出处
《山西化工》
CAS
2024年第11期8-9,13,共3页
Shanxi Chemical Industry
基金
宁德师范学院中青年教师科研项目建设专项(2022ZQ104)
大学生创新创业训练计划项目(S202410398005)。