化工新型材料

化工新型材料 ›› 2022, Vol. 50 ›› Issue (3) : 200-205. DOI: 10.19817/j.cnki.issn1006-3536.2022.03.041

科学研究

不同方法制备Si/Li₄Ti₅O₁₂负极复合材料的研究

作者信息 +

Research on preparation of Si/Li₄Ti₅O₁₂ anode composite by different methods

Ban Yueqin, Wang Quanwei, Zhou Hengwei

Author information +

文章历史 +

Received
2021-10-09
Issue Date	Revised Date
2022-03-29	2021-10-09

PDF

摘要

硅在充放电过程中体积膨胀较为严重,阻碍了硅在锂离子电池负极材料领域的应用,利用Li₄Ti₅O₁₂材料自身结构具有“零应变性”的最大优点,采用球磨法、静电纺丝法和水热法制备了Si/Li₄Ti₅O₁₂复合材料作为锂离子电池负极材料。使用X射线衍射分析、扫描电镜和能谱仪等测试手段分别对复合材料进行了表征,并主要研究了不同方法制备的Si/Li₄Ti₅O₁₂对纳米硅粉包覆状态对硅在充放电过程中体积改变的影响。结果表明:水热法制备的复合材料扩散系数最大,为2.17078×10^-12cm²/s,阻抗最小,为300Ω。水热法制备的复合材料的电化学性能最佳,充放电曲线电压平台最长,首次充放电比容量分别为550mAh/g和530mAh/g,30次循环后比容量在310mAh/g,相应的库仑效应和比容量保留能力为96%和55%。

Abstract

Silicon volume expansion is more serious in the process of charge and discharge,which prevents the application of silicon in the field of lithium ion battery anode materials,the iggest advantage of Li₄Ti₅O₁₂ material's own structure was “zero strain”,Si/Li₄Ti₅O₁₂ composite material as the anode material of lithium ion battery was prepared by ball milling method,electrospinning method and hydrothermal method.The materials were characterized by X-ray diffraction analysis,scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS),and the effect of different preparation methods of Si/Li₄Ti₅O₁₂ on the coating of nano silicon powder on the volume change of silicon during charge and discharge process was mainly studied.Research shown that the maximum diffusion coefficient and the minimum impedance of the composite prepared by hydrothermal method were 2.17078×10^-12cm²/s and 300Ω,respectively.Electrochemical tests shown that the hydrothermal composite had the best electrochemical performance and the longest charge-discharge voltage platform.The first charge-discharge specific capacity was 550mAh/g and 530mAh/g,respectively.After 30 cycles,the specific capacity was 310mAh/g,and the corresponding coulomb effect and specific capacity retention capacity were 96% and 55%,respectively.

关键词

负极材料 / Si/Li₄Ti₅O₁₂复合材料 / 化学性能

Key words

anode material / Si/Li₄Ti₅O₁₂ composite material / chemical property

引用本文

引用格式 ▾

不同方法制备Si/Li₄Ti₅O₁₂负极复合材料的研究[J]. 化工新型材料, 2022, 50(3): 200-205 DOI:10.19817/j.cnki.issn1006-3536.2022.03.041

登录浏览全文

4963

注册一个新账户忘记密码

参考文献

原文顺序 | 出版日期 | 本文引用

[1] 潘璇,王存国,朱孟康,等.锂离子电池大容量硅基负极材料的研究进展[J].化工科技,2017,25(1):67-72.
[2] 魏伯伦.碳纳米管和石墨烯在锂离子电池硅负极中的应用[J].当代化工研究,2019(2):73-75.
[3] Wang D S,Gao M X,Liu Y F,et al.Enhanced cycle stability of micro-sized Si/C anode material with low carbon content fabricated via spray drying and in situ carbonization[J].Journal of Alloys and Compounds,2014,604:130-136.
[4] 陈苗,王海风,罗维,等.单质硅基复合材料:表面与界面调控及化学性能[J].化学世界,2018,59(1):1-9.
[5] Lu C X,Fan Y,Li H,et al.Core-shell CNT-Ni-Si nanowires as a high performance anode material for lithium ion batteries[J].Carbon,2013,63:54-60.
[6] Wang D S,Gao M X,P H G,et al.High performance amorphous-Si/SiO_x/C composite anode materials for Li-ion batteries derived from ball-milling and in situ carbonization[J].Journal of Power Sources,2014,256:190-199.
[7] Ban Y Q,Shao W Q,Chen S OU,et al.Influence of carbon inclusion on the electrochemical performances for Si using as the lithium-ion battery anode[J].Materials Science Forum,2016,852:811-815.
[8] 谭毅,王凯.高能比能量锂离子电池硅基负极材料研究进展[J].无机材料学报,2019,34(4):349-356.
[9] 牛津,张苏,牛越,等.硅基锂离子电池负极材料[J].化学进展,2015,27(9):1275-1290.
[10] Ban Y Q,Shao W Q,Chen S O,et al.Preparation of Si/C composite nanofibers by electrospinning method using as the lithium-ion battery anode[J].International Conference on Materials Engineering and Information Technology Applications,2015,28:739-743.
[11] Lee Eunju,Banng Minjung,Kim Byungsook,et al.Coarsening of high purity SiC particles by gas phase transport[J].Ceramics International,2015,41:14958-14963.
[12] Gupta Supriya,Sharma Sandan Kumar,Kumar B Venkata Manoj,et al.Tribological characteristics of SiC ceramics sintered with a small amount of yttria[J].Ceramics International,2015,41(10):14780-14789.
[13] Li H J,Chen Z S,Li K Z,et al.Wear behavior of SiC nanowire-reinforced SiC coating for C/C composites at elevated temperatures[J].Journal of the European Ceramic Society,2013,33:2961-2969.
[14] Wen S J,Li G J,Ren Ruiming,et al.Preparation of spherical Li₄Ti₅O₁₂ anode materials by spray drying[J].Materials Letters,2015,148:130-133.
[15] Zang Q Y,Verde Michael G,Seo Joon Kyo,et al.Structural and electrochemical properties of Gd-doped Li₄Ti₅O₁₂ as anode material with improved rate capability for lithium-ion batteries[J].Journal of Power Sources,2015,280:355-362.
[16] Chen W,Jiang H,Hu Y,et al.Mesoporous single crystals Li₄Ti₅O₁₂ grown on rGO as high rate anode materials for lithium-ion batteries[J].Chemical Communications,2014,50(64):8856-8859.
[17] 廉恬柔,卢玉晓,吴冰,等.纳米级Li₄Ti₅O₁₂负极材料的制备及其运输特性[J].材料工程,2021,49(3):59-66.
[18] 王鸣,黄俊涛,程丽丽,等.锂离子电池负极材料用Li₄Ti₅O₁₂@C复合材料的制备及电化学性能[J].材料导报,2020,34(2):01019-01023.
[19] Li Y,Xu G J,Yao Y F,et al.Coaxial electrospun Si/C—C core-shell composite nanofibers as binder-free anodes for lithium-ion batteries[J].Solid State Ionics,2014.258:67-73.
[20] Wang Q W,Ban Y Q,Zhou H W,et al.Preparation of Si/TiO₂ composite by the sol-gel method using as the lithium-ion battery anode[J].Materials Science and Engineering,2017,250:012054-012054.
[21] Qian S,Liu X Y.Cytocompatibility of Si-incorporated TiO₂ nanopores films[J].Colloids and Surfaces B:Biointerfaces,2015,133:214-220.