Influence of additives in a PVDF-based solid polymer electrolyte on conductivity and Li-ion battery performance. Issue 2 (22nd December 2017)

• Record Type: Journal Article
• Authors: Wang, Furi; Li, Libo; Yang, Xueying; You, Jun; Xu, Yanping; Wang, Heng; Ma, Yue; Gao, Guanxiong
• Is Part Of: Sustainable energy & fuels. Volume 2:Issue 2(2018)
• Page Start: 492
• Page End: 498
• Publication Date: 2017-12-22
• Subjects: Renewable energy sources -- Periodicals; Fuel cells -- Periodicals; Electric batteries -- Periodicals; Electrochemistry -- Periodicals; 660.297
• DOI: 10.1039/c7se00441a
• Languages: English
• ISSNs: 2398-4902

Abstract

Abstract : The transformation of PVDF from α-phase to β-phase makes PVDF more polar and decreases the crystallinity of PVDF. Abstract : Polyvinylidene fluoride (PVDF) was used as a membrane matrix, and then many groups of experiments with different additives were carried out to investigate the factor that affects conductivity of the solid polymer electrolyte (SPE). Impedance measurements were performed using an electrochemical work station. Data obtained through alternating current (AC) impedance measurements revealed that the conductivity of the blending membrane was improved. The presence of hydroxyl end-groups and some electron-donating groups in the additives was helpful for increasing the conductivity. In particular, when PVP and EDTA were added, the conductivity of the polymer electrolyte could achieve a value of 7.19 × 10 −4 S cm −1 at 25 °C and a lithium ion transference number of 0.49. The electrochemical stability window was about 4.3 V ( vs. Li + /Li).