Fabrication of hollow lithium titanate material by electrospinning

WANG Yu-dong; YANG Kai; ZHANG Ming-jie; LI Jian-ling; GAO Fei; LIU Hao; GENG Meng-meng

doi:10.13374/j.issn2095-9389.2019.01.012

Volume 41 Issue 1

Jan. 2019

Turn off MathJax

Article Contents

Article Navigation > Chinese Journal of Engineering > 2019 > 41(1): 111-116

WANG Yu-dong, YANG Kai, ZHANG Ming-jie, LI Jian-ling, GAO Fei, LIU Hao, GENG Meng-meng. Fabrication of hollow lithium titanate material by electrospinning[J]. Chinese Journal of Engineering, 2019, 41(1): 111-116. doi: 10.13374/j.issn2095-9389.2019.01.012

Citation:

WANG Yu-dong, YANG Kai, ZHANG Ming-jie, LI Jian-ling, GAO Fei, LIU Hao, GENG Meng-meng. Fabrication of hollow lithium titanate material by electrospinning[J]. Chinese Journal of Engineering, 2019, 41(1): 111-116. doi: 10.13374/j.issn2095-9389.2019.01.012

Citation:

PDF( 4298 KB)

Fabrication of hollow lithium titanate material by electrospinning

doi: 10.13374/j.issn2095-9389.2019.01.012

1.
State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems, China Electric Power Research Institute. Beijing 100192, China
2.
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China

More Information

Corresponding author: YANG Kai, E-mail: yangkai@epri.sgcc.com.cn
Received Date: 2017-12-20
Publish Date: 2019-01-01

Abstract

Abstract

Lithium titanate (Li₄Ti₅O₁₂, LTO) is an important material to be used as an anode for LIBs (Li⁺ ion battery). LTO is a zero-strain material (i.e., no structural change occurs during Li insertion/extraction). Although LTO is a very safe material that can be used as an anode material in high and low temperature environment, its rate capability is compromised by its low electronic conductivity and poor Li⁺ diffusion coefficient. In the recent years, considerable research around the world has focused on improving LTO rate performance. Efforts to achieve better electrical conduction between LTO particles have included LTO particle size control, conductive-material surface coatings, and alien ion doping. However, in this study electrochemical properties were improved by changing the morphology of LTO. Based on traditional electrospinning technology, LTO fibers with a hollow structure were produced using a nested coaxial nozzle modified from the conventional spinning nozzle and coaxial cospinning with two different solutions. A comparison of this results with those of solid LTO prepared by traditional electrospinning technology demonstrates that hollow LTO is characterized by uniform particle size and no agglomeration, along with an obvious hollow structure, clear crystal lattice stripes, and good crystallization property. The specific surface of this hollow LTO is 1.3 times than its solid counterpart. This morphological change greatly improves the electrochemical performance of the material. Although the discharge specific capacities of both the solid and hollow LTO are close to the theoretical value for small ratios, the hollow LTO is superior to its solid counterpart at 20C. The discharge specific capacity of the hollow LTO can reach 130 mA·h·g^-1 at 20C, and after 200 cycles, its capacity retention ratio remains at 98%, which suggests good stability. Cyclic voltammetry and AC impedance curves also show that the hollow structure reduces the degree of polarization and the electrochemical reaction impedance of LTO, which makes LTO more conducive to electrochemical reaction.
- lithium titanate,
- electrospinning,
- hollow structure,
- energy storage,
- lithium-ion battery

FullText(HTML)

References(15)

References

[1]	劉永相, 侯興哲, 李林霞, 等. 鈦酸鋰電池在城市公交電動產業化中的應用. 智能電網, 2014, 4: 280 Liu Y X, Hou X Z, Li L X, et al. Application of lithium titanate battery in industrialization of urban transit electric vehicles. Smart Grid, 2014, 4: 280
[2]	黃任飛. 鈦酸鋰電池在兆瓦級儲能系統中的應用分析. 儲能科學與技術, 2015, 4(3): 290 doi: 10.3969/j.issn.2095-4239.2015.03.008 Huang R F. Analysis for the applications of lithium titanate battery in the MW-class energy storage systems. Energy Storage Sci Technol, 2015, 4(3): 290 doi: 10.3969/j.issn.2095-4239.2015.03.008
[3]	倪海芳, 范麗珍. 尖晶石型Li₄Ti₅O₁₂負極材料的研究進展. 硅酸鹽學報, 2012, 40(4): 548 https://www.cnki.com.cn/Article/CJFDTOTAL-GXYB201204016.htm Ni H F, Fan L Z. Developments on spinel Li₄Ti₅O₁₂ as anode material. J Chin Ceram Soc, 2012, 40(4): 548 https://www.cnki.com.cn/Article/CJFDTOTAL-GXYB201204016.htm
[4]	Li Z Y, Li J L, Zhao Y G, et al. Influence of cooling mode on the electrochemical properties of Li₄Ti₅O₁₂ anode materials for lithium-ion batteries. Ionics, 2016, 22(6): 789 doi: 10.1007/s11581-015-1610-0
[5]	Deptu?a A, ?ada W, Olczak T, et al. Preparation of lithium titanate by sol-gel method. Nukleonika, 2001, 46(3): 95
[6]	張遙遙, 王丹, 張春明, 等. 水熱法制備鋰離子電池負極材料Li₄Ti₅O₁₂研究進展. 電源技術, 2014, 38(11): 2202 doi: 10.3969/j.issn.1002-087X.2014.11.070 Zhang Y Y, Wang D, Zhang C M, et al. Research progress on Li₄Ti₅O₁₂ as anode material for Li-ion battery synthesized by hydrothermal method. Chin J Power Sources, 2014, 38(11): 2202 doi: 10.3969/j.issn.1002-087X.2014.11.070
[7]	劉微, 張妮, 白陽, 等. 微波輔助溶膠-凝膠法合成鋰離子電池負極材料Li₄Ti₅O₁₂. 硅酸鹽學報, 2010, 38(12): 2279 https://www.cnki.com.cn/Article/CJFDTOTAL-GXYB201012014.htm Liu W, Zhang N, Bai Y, et al. Synthesis of lithium-ion battery anode material Li₄Ti₅O₁₂ by the microwave assisted sol-gel method. J Chin Ceram Soc, 2010, 38(12): 2279 https://www.cnki.com.cn/Article/CJFDTOTAL-GXYB201012014.htm
[8]	Gong X, Yang J L, Jiang Y L, et al. Application of electrospinning technique in power lithium-ion batteries. Prog Chem, 2014, 26(1): 41 http://en.cnki.com.cn/Article_en/CJFDTOTAL-HXJZ201401005.htm
[9]	李學良, 張楊, 尤亞華, 等. 離子熱法制備Li₄Ti₅O₁₂負極材料及其電化學性能. 硅酸鹽學報, 2013, 41(1): 7 https://www.cnki.com.cn/Article/CJFDTOTAL-GXYB201301003.htm Li X L, Zhang Y, You Y H, et al. Ionothermal synthesis and electrochemical properties of Li₄Ti₅O₁₂ anode material. J Chin Ceram Soc, 2013, 41(1): 7 https://www.cnki.com.cn/Article/CJFDTOTAL-GXYB201301003.htm
[10]	Haridas A K, Sharma C S, Rao T N. Electrochemical performance of lithium titanate submicron rods synthesized by sol-gel/electrospinning. Electroanalysis, 2014, 26(11): 2315 doi: 10.1002/elan.201400233
[11]	Yu Q, Wang M, Chen H. Fabrication of ordered TiO₂ nanoribbon arrays by electrospinning. Mater Lett, 2010, 64(3): 428 doi: 10.1016/j.matlet.2009.11.039
[12]	張娓華, 劉呈坤, 孫潤軍, 等. 靜電紡參數對納米纖維直徑及定向性的影響. 合成纖維, 2011, 40(1): 38 https://www.cnki.com.cn/Article/CJFDTOTAL-HCXW201101010.htm Zhang W H, Liu C K, Sun R J, et al. Effect of electrospinning parameters on diameter and orientation of nanofiber. Synth Fiber China, 2011, 40(1): 38 https://www.cnki.com.cn/Article/CJFDTOTAL-HCXW201101010.htm
[13]	Cho Y, Lee S, Lee Y, et al. Spinel-layered core-shell cathode materials for Li-ion batteries. Adv Energy Mater, 2011, 1(5): 821 doi: 10.1002/aenm.201100239
[14]	Vaseashta A. Controlled formation of multiple Taylor cones in electrospinning process. Appl Phys Lett, 2007, 90(9): 093115-1 doi: 10.1063/1.2709958
[15]	Moghe A K, Gupta B S. Co-axial electrospinning for nanofiber structures: preparation and applications. Polym Rev, 2008, 48(2): 353 doi: 10.1080/15583720802022257