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Research Papers

Composite Nanofiber Membrane for Lithium-Ion Batteries Prepared by Electrostatic Spun/Spray Deposition

[+] Author and Article Information
Bin Yu

School of Textile,
Tianjin Polytechnic University,
Tianjin 300387, China
e-mail: zijieyb@163.com

Xiao-Ming Zhao

Professor
School of Textile,
Tianjin Polytechnic University,
Tianjin 300387, China
e-mail: zhaoxiaoming@tjpu.edu.cn

Xiao-Ning Jiao

Professor
School of Textile,
Tianjin Polytechnic University,
Tianjin 300387, China
e-mail: xiaoningj@tjpu.edu.cn

Dong-Yue Qi

Guangzhou Fibre Product Testing
and Research Institute,
Guangzhou 511447, China
e-mail: qidongyue0403@163.com

1Corresponding author.

Manuscript received October 27, 2015; final manuscript received June 22, 2016; published online July 19, 2016. Assoc. Editor: Peter Pintauro.

J. Electrochem. En. Conv. Stor. 13(1), 011008 (Jul 19, 2016) (6 pages) Paper No: JEECS-15-1002; doi: 10.1115/1.4034030 History: Received October 27, 2015; Revised June 22, 2016

A new kind of sandwiched composite membrane (SCM) for lithium-ion batteries is prepared by depositing zirconia microparticle between two layers of electrospun poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP) nanofibers by electrostatic spray deposition. The thermal shrinkage, electrochemical properties of the separator, and cycle performance for batteries with the SCM were investigated. The results show that the SCM has a high electrolyte uptake and easily absorbs electrolyte to form gelled polymer electrolytes (GPEs). The SCM GPEs have a high ionic conductivity of up to 2.06 × 10−3 S cm−1 at room temperature and show a high electrochemical stability potential of 5.4 V. With LiCoCO2 as cathode, the cell with SCM GPEs exhibits a high initial discharge capacity of 149.7 mAh g−1.

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Figures

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Fig. 1

Preparation of the SCM

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Fig. 2

The SEM photographs of the composite membrane: (a) cross section, (b) outer layer, and (c) inner layer

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Fig. 3

The photograph of the membranes before and after thermal treatment

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Fig. 4

Stress–strain curves of the PHM, SCM, and Celgard 2400

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Fig. 5

Electrochemical impedance spectra of the SCM and PHM GPEs

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Fig. 6

Temperature-dependent ionic conductivity of the SCM and PHM GPEs

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Fig. 7

The electrochemical stability of SCM and PHM GPEs

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Fig. 8

Initial charge–discharge curves for the cells tested

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Fig. 9

Cycle performance for the cells tested

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