化工新型材料

化工新型材料 ›› 2020, Vol. 48 ›› Issue (3) : 85-90.

新材料与新技术

水体系自组装法制备钛酸锂纳米负极材料研究

作者信息 +

Self-assembly preparation of Li₄Ti₅O₁₂ nanomaterial in water system

Liu Mengjing, Hu Guoxin

Author information +

文章历史 +

Received		Published
2018-10-16		2020-03-20
Issue Date	Revised Date
2020-04-02	2018-10-16

PDF (2893K)

摘要

以偏钛酸粉末作为钛源,制备钛酸锂(Li₄Ti₅O₁₂)纳米材料,Li₄Ti₅O₁₂由含锂过氧化钛配合物分解自组装后经煅烧结晶而得。采用X射线衍射、扫描电子显微镜、氮气吸附-脱附和恒流充放电测试对材料结构、形貌和电化学性能进行表征。结果表明:水体系下,锂钛摩尔比为4∶5、于600℃煅烧5h得到的Li₄Ti₅O₁₂纳米球颗粒粒径在500nm左右,且具有丰富的孔隙,比表面积达到22.947m²/g;在电流密度4000mA/g条件下,比容量为157mAh/g,电流密度500mA/g下循环400次放电容量保持率为95.2%。表明水体系自组装形成的Li₄Ti₅O₁₂纳米负极材料可以缩短锂离子迁移距离,其多孔性可以增大电解液与电极活性材料的接触面积,使离子电子传输速率同时得到提高,从而获得优异的电化学性能。

Abstract

The lithium titanate (Li₄Ti₅O₁₂) nanomaterial was prepared by using metatitanic acid powder as a titanium source.Li₄Ti₅O₁₂ was obtained by decomposing and self-assembling a lithium-containing titanium oxide complex after calcination and crystallization.The structure,morphology and electrochemical properties of the materials were characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM),nitrogen adsorption desorption (BET),and constant current charge and discharge tests.Under the water system,with the lithium to titanium ratio of 4∶5,lithium titanate nanospheres about 500nm can be obtained by calcining 5 hours at 600℃,and abundant pores with a specific surface area of 22.947m²/g were formed.The specific capacity current density was 157mAh/g at 4000mA/g and the capacity retention was 95.2% after 400 cycles at 500mA/g.Therefore,the lithium titanate nanoparticles can shorten the lithium ion migration distance and the porosity can increase the contact area between the electrolyte and the electrode active material,the excellent electrochemical performance were obtained.

关键词

锂离子电池 / 钛酸锂 / 纳米材料 / 自组装 / 电化学性能

Key words

lithium-ion battery / Li₄Ti₅O₁₂ / nanomaterial / self-assembly / electrochemical performance

引用本文

引用格式 ▾

水体系自组装法制备钛酸锂纳米负极材料研究[J]. 化工新型材料, 2020, 48(3): 85-90 DOI:

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] Blomgren G E.The development and future of lithium ion batteries[J].Journal of the Electrochemical Society,2017,164(1):5019-5025.
[2] Aravindan V,Lee Y S,Madhavi S.Research progress on negative electrodes for practical Li-ion batteries:beyond carbonaceous anodes[J].Adv Energy Mater,2015,5(13):43.
[3] Mahmoud A,Amarilla J M,Saadoune I.Effect of thermal treatment used in the sol-gel synthesis of Li₄ Ti₅O₁₂ spinel on its electrochemical properties as anode for lithium ion batteries[J].Electrochimica Acta,2015,163(213):220.
[4] Yi T F,Yang S Y,Xie Y.Recent advances of Li₄Ti₅O₁₂ as a promising next generation anode material for high power lithium-ion batteries[J].Journal of Materials Chemistry A,2015,3(11):5750-5777.
[5] Son I H,Park J H,Kwon S,et al.Graphene coating of silicon nanoparticles with CO₂-enhanced chemical vapor deposition[J].Small,2016,12(5):658-667.
[6] Chabot V,Feng K,Park H W,et al.Graphene wrapped silicon nanocomposites for enhanced electrochemical performance in lithium ion batteries[J].Electrochimica Acta,2014,130(127):34.
[7] Zhang N,Liu Y,Yang J,et al.Preparation and characterization of nanosized multi-sphere Si-TiO₂ based composites for lithium storage[J].Electrochimica Acta,2016,212(657):61.
[8] Hwa Y,Kim W S,Yu B C,et al.Facile synthesis of Si/TiO₂ (anatase) core-shell nanostructured anodes for rechargeable Li-ion batteries[J].Journal of Electroanalytical Chemistry,2014,712(202):6.
[9] Lee J I,Ko Y,Shin M,et al.High-performance silicon-based multicomponent battery anodes produced via synergistic coupling of multifunctional coating layers[J].Energy & Environmental Science,2015,8(7):2075-2084.
[10] UsuiI H,Wasada K,Shimizu M,et al.TiO₂/Si composites synthesized by sol-gel method and their improved electrode performance as Li-ion battery anodes[J].Electrochimica Acta,2013,111(575):80.
[11] Zhu K,Gao H,Hu G,et al.Scalable synthesis of hierarchical hollow Li₄Ti₅O₁₂ microspheres assembled by zigzag-like nanosheets for high rate lithium-ion batteries[J].Journal of Power Sources,2017,340(263):72.
[12] Kunxu Z,Guo X H.Dual phase Li₄Ti₅O₁₂-TiO₂ hierarchical hollow microspheres as anode materials for high rate lithium-ion batteries[J].IOP Conference Series:Materials Science and Engineering,2017,167(1):012012.
[13] Zhang Y,Tang G Y,Li W,et al.Nanostructured TiO₂-based anode materials for high-performance rechargeable lithium-ion batteries[J].Chemnanomat,2016,2(8):764-775.
[14] Wang B,Xin H,Li X,et al.Mesoporous CNT@TiO₂-C nanocable with extremely durable high rate capability for lithium-ion battery anodes[J].Scientific Reports,2014,4:3729.
[15] Li J,Wan W,Zhu F,et al.Nanotube-based hierarchical titanate microspheres:an improved anode structure for Li-ion batteries[J].Chemical Communications,2012,48(3):389.
[16] Tang Y,Gong D,Lai Y,et al.Hierarchical layered titanate microspherulite:formation by electrochemical spark discharge spallation and application in aqueous pollutant treatment[J].Journal of Materials Chemistry,2010,20(45):10169-10178.
[17] Wu H B,Lou X W,Hng H H.Synthesis of uniform layered protonated titanate hierarchical spheres and their transformation to anatase TiO₂ for lithium-ion batteries[J].Chemistry-A European Journal,2012,18(7):2094-2099.
[18] Gao Y,Masayuki N,Won-Seon S,et al.Template-free self-assembly of a nanoporous TiO₂ thin film[J].J Am Ceram Soc,2010,90(3):831-837.
[19] Kakihana M,Kobayashi M,Tomita K,et al.Application of water-soluble titanium complexes as precursors for synthesis of titanium-containing oxides via aqueous solution processes[J].Bull Chem Soc Jpn,2010,83(11):1285-1308.
[20] Ladislav Kavan,Ji Rˇ Rathousk,Michaelgr Tzel,et al.Surfactant-templated TiO₂ (anatase):characteristic features of lithium insertion electrochemistry in organized nanostructures[J].Journal of Physical Chemistry B,2000,104(50):12012-12020.