A new strategy of PVDF based Li-salt polymer electrolyte through electrospinning for lithium battery application

S. Janakiraman; Abhijith Surendran; Sudipto Ghosh; S. Anandhan; A. Venimadhav

doi:10.1088/2053-1591/aaf369

A new strategy of PVDF based Li-salt polymer electrolyte through electrospinning for lithium battery application

S. Janakiraman, Abhijith Surendran, Sudipto Ghosh, S. Anandhan, A. Venimadhav

Biomedical Engineering

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

Polyvinylidene fluoride (PVDF) ultrafine fibers with different proportions of lithium nitrate (LiNO₃) were fabricated by an electrospinning device. The processing parameters are optimized to 19 wt% PVDF to get a bead free structure. Scanning electron microscope (SEM) and atomic force microscope (AFM) showed the uniform and interconnected porous structure. With the addition of 2 wt% LiNO₃, the fiber diameter of the electrospun membrane decreased from 371 to 222 nm. Furthermore, the addition of LiNO₃ into the nanofibrous membrane enhanced the ionic conductivity from 0.97 ×10^-3 S cm^-1 to 1.61 ×10^-3 S cm^-1 at room temperature after soaking with 1 M LiPF₆ (lithium hexafluoro-phosphate) in ethylene carbonate (EC) and diethyl carbonate (DEC) in (1:1 wt%). Compared with the conventional Celgard and pristine PVDF membrane, the salt doped PVDF membranes showed higher electrochemical stability window and lower interfacial resistance. The electrospun membrane separators (ES) were assembled into Lithium cobalt oxide (LiCoO₂) as cathode and lithium metal as an anode. The salt doped membrane showed superior discharge, C-rate and stable cycle performance than the commercial Celgard membrane.

Original language	English (US)
Article number	035303
Journal	Materials Research Express
Volume	6
Issue number	3
DOIs	https://doi.org/10.1088/2053-1591/aaf369
State	Published - Mar 2019

Keywords

Electrospinning
ionic conductivity
lithium nitrate
polyvinylidene fluoride

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biomaterials
Surfaces, Coatings and Films
Polymers and Plastics
Metals and Alloys

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10.1088/2053-1591/aaf369

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title = "A new strategy of PVDF based Li-salt polymer electrolyte through electrospinning for lithium battery application",

abstract = "Polyvinylidene fluoride (PVDF) ultrafine fibers with different proportions of lithium nitrate (LiNO3) were fabricated by an electrospinning device. The processing parameters are optimized to 19 wt% PVDF to get a bead free structure. Scanning electron microscope (SEM) and atomic force microscope (AFM) showed the uniform and interconnected porous structure. With the addition of 2 wt% LiNO3, the fiber diameter of the electrospun membrane decreased from 371 to 222 nm. Furthermore, the addition of LiNO3 into the nanofibrous membrane enhanced the ionic conductivity from 0.97 ×10-3 S cm-1 to 1.61 ×10-3 S cm-1 at room temperature after soaking with 1 M LiPF6 (lithium hexafluoro-phosphate) in ethylene carbonate (EC) and diethyl carbonate (DEC) in (1:1 wt%). Compared with the conventional Celgard and pristine PVDF membrane, the salt doped PVDF membranes showed higher electrochemical stability window and lower interfacial resistance. The electrospun membrane separators (ES) were assembled into Lithium cobalt oxide (LiCoO2) as cathode and lithium metal as an anode. The salt doped membrane showed superior discharge, C-rate and stable cycle performance than the commercial Celgard membrane.",

keywords = "Electrospinning, ionic conductivity, lithium nitrate, polyvinylidene fluoride",

author = "S. Janakiraman and Abhijith Surendran and Sudipto Ghosh and S. Anandhan and A. Venimadhav",

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T1 - A new strategy of PVDF based Li-salt polymer electrolyte through electrospinning for lithium battery application

AU - Janakiraman, S.

AU - Surendran, Abhijith

AU - Ghosh, Sudipto

AU - Anandhan, S.

AU - Venimadhav, A.

PY - 2019/3

Y1 - 2019/3

N2 - Polyvinylidene fluoride (PVDF) ultrafine fibers with different proportions of lithium nitrate (LiNO3) were fabricated by an electrospinning device. The processing parameters are optimized to 19 wt% PVDF to get a bead free structure. Scanning electron microscope (SEM) and atomic force microscope (AFM) showed the uniform and interconnected porous structure. With the addition of 2 wt% LiNO3, the fiber diameter of the electrospun membrane decreased from 371 to 222 nm. Furthermore, the addition of LiNO3 into the nanofibrous membrane enhanced the ionic conductivity from 0.97 ×10-3 S cm-1 to 1.61 ×10-3 S cm-1 at room temperature after soaking with 1 M LiPF6 (lithium hexafluoro-phosphate) in ethylene carbonate (EC) and diethyl carbonate (DEC) in (1:1 wt%). Compared with the conventional Celgard and pristine PVDF membrane, the salt doped PVDF membranes showed higher electrochemical stability window and lower interfacial resistance. The electrospun membrane separators (ES) were assembled into Lithium cobalt oxide (LiCoO2) as cathode and lithium metal as an anode. The salt doped membrane showed superior discharge, C-rate and stable cycle performance than the commercial Celgard membrane.

AB - Polyvinylidene fluoride (PVDF) ultrafine fibers with different proportions of lithium nitrate (LiNO3) were fabricated by an electrospinning device. The processing parameters are optimized to 19 wt% PVDF to get a bead free structure. Scanning electron microscope (SEM) and atomic force microscope (AFM) showed the uniform and interconnected porous structure. With the addition of 2 wt% LiNO3, the fiber diameter of the electrospun membrane decreased from 371 to 222 nm. Furthermore, the addition of LiNO3 into the nanofibrous membrane enhanced the ionic conductivity from 0.97 ×10-3 S cm-1 to 1.61 ×10-3 S cm-1 at room temperature after soaking with 1 M LiPF6 (lithium hexafluoro-phosphate) in ethylene carbonate (EC) and diethyl carbonate (DEC) in (1:1 wt%). Compared with the conventional Celgard and pristine PVDF membrane, the salt doped PVDF membranes showed higher electrochemical stability window and lower interfacial resistance. The electrospun membrane separators (ES) were assembled into Lithium cobalt oxide (LiCoO2) as cathode and lithium metal as an anode. The salt doped membrane showed superior discharge, C-rate and stable cycle performance than the commercial Celgard membrane.

KW - Electrospinning

KW - ionic conductivity

KW - lithium nitrate

KW - polyvinylidene fluoride

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A new strategy of PVDF based Li-salt polymer electrolyte through electrospinning for lithium battery application

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Keywords

ASJC Scopus subject areas

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