Sb/Sb_(2)O_(3)/C复合纳米纤维膜制备与储锂性能研究  

Preparation and lithium storage performance of Sb/Sb_(2)O_(3)/C composite fiber

作　　者：赵得帅 赵飒 马闻骏 马昌[1] 宋燕[2] 史景利[1] ZHAO De-shuai;ZHAO Sa;MA Wen-jun;MA Chang;SONG Yan;SHI Jing-li(Tianjin Municipal Key Lab of Advanced Fiber and Energy Storage Technology,TianGong University,Tianjin 300387,China;Key Laboratory of Carbon Materials,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China)

机构地区：[1]天津工业大学,天津市先进纤维与储能技术重点实验室,天津300387 [2]中国科学院山西煤炭化学研究所,中国科学院炭材料重点实验室,山西太原030001

出　　处：《炭素》2023年第2期3-9,共7页Carbon

基　　金：国家自然科学基金(52072383);中科院炭材料重点实验室开放基金(No.KLCMKFJJ2011);天津市自然科学基金(No.16JCQNJC06300)

摘　　要：Sb作为锂离子电池负极材料具有较高的理论容量,但在合金/脱合金化过程中的体积粉化严重影响了其循环稳定性。本文首先合成了含锑MOF纳米片(Sb-MOF),并通过静电纺丝技术将其复合到纳米纤维中,经过热处理后制备了Sb/Sb_(2)O_(3)/C复合纳米纤维膜。得益于Sb//Sb_(2)O_(3)在碳基质中的高分散性,所得复合纤维膜在锂离子电池中表现出优异的倍率和循环性能,具体表现为:在0.1Ag^(-1)和4Ag^(-1)电流密度下,可逆比容量分别为713mAhg^(-1)和352mAhg^(-1);在1Ag^(-1)电流密度下循环500次后容量保持率为82.3%。优异的储锂性能、简单的工艺以及自支撑特性使得该Sb/Sb_(2)O_(3)/C复合纳米纤维膜作为自支撑电极在锂离子电池领域具有较大的发展潜力。Sb has a high theoretical capacity as an anode material for lithium-ion batteries,but the volume change during the alloying/de-alloying process seriously damages its cycling stability.In this work,antimony-containing MOF nanosheets(Sb-MOF)were first synthesized,and then compounded into nanofibers by electrospinning technique.After heat treatment,Sb/Sb_(2)O_(3)/C composite nanofiber membranes were prepared.Thanks to high dispersibility of Sb/Sb_(2)O_(3) in carbon matrix,the composite fiber membrane exhibited excellent multiplicity and cycling performance in lithium-ion batteries.Specifically,at current densities of o.1 A g^(-1)and 4 A g^(-1),the reversible specific capacities are 713 mAh g^(-1)and 352 mAh g,respectively.The capacity retention rate was 82.3% after 500 cycles at 1 A g^(-1).The excellent lithium storage performance,simple process,and self-supporting characteristics makes the Sb/Sb_(2)O_(3)/C composite nanofiber membrane has great potential as a self-supporting electrode in the field of lithium-ion batteries.

关 键 词：静电纺丝 锑基负极材料 锂离子电池 自支撑电极 

分 类 号：TB332[一般工业技术—材料科学与工程]