Electrochemical Stability of PVA Alkaline Gel Polymer Electrolyte Membranes

Authors

Jun-hong WANG, Institute of New Energy Material Chemistry, Nankai University, Tianjin 300071,China;
Jian-min LIU, Institute of New Energy Material Chemistry, Nankai University, Tianjin 300071,China;
Hua-bin YANG, Institute of New Energy Material Chemistry, Nankai University, Tianjin 300071,China;
Zuo-xiang ZHOU, Institute of New Energy Material Chemistry, Nankai University, Tianjin 300071,China;

Corresponding Author

Hua-bin YANG

Abstract

Polyvinyl alcohol (PVA) alkaline polymer gel electrolyte(GPE) membranes were successfully prepared by a solution-casting technique and their electrochemical stabilities were investigated. The electrochemical impedance spectrum (EIS) results showed that the ionic conductivity of the PVA alkaline GPE membranes first increased with the increase of KOH content, then decreased with the further increase of KOH. When the weight percentage of the KOH in the PVA alkaline GPE membrane approached to 42%, it exhibitedthe highest ionic conductivity of 2.01×10~(-3 ) S/cm at room temperature (R.T.). The X-ray diffraction (XRD) results revealed that with the increase of KOH the crystalline of the PVA was disrupted and converted into an amorphous phase. While the ionic conductivity decreased due to the increase of the amorphous unionized KOH in the membranes with the further increase of KOH. The cyclic voltammograms (CV) and Raman spectra indicated that the GPE membranes had promising electrochemical stabilities. It is suggested that the PVA alkalineGPE membranes could be used for practical applications in alkaline rechargeablebatteries.

Keywords

Polyvinyl alcohol, Alkaline polymer gel electrolyte, Membrane, Electrochemical stability, Alkaline rechargeable battery

DOI Link

https://doi.org/10.61558/2993-074X.1627

Publication Date

2005-05-28

Online Available Date

2005-05-28

Revised Date

2005-05-28

Received Date

2005-05-28

Recommended Citation

Jun-hong WANG, Jian-min LIU, Hua-bin YANG, Zuo-xiang ZHOU. Electrochemical Stability of PVA Alkaline Gel Polymer Electrolyte Membranes[J]. Journal of Electrochemistry, 2005 , 11(2): 129-132.
DOI: 10.61558/2993-074X.1627
Available at: https://jelectrochem.xmu.edu.cn/journal/vol11/iss2/3

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