Effect of storage time on the properties of PVA–KOH alkaline solid polymer electrolyte system

Abstract

Polyvinyl alcohol (PVA) and potassium hydroxide (KOH) have been used to prepare alkaline solid polymer electrolytes (ASPE) films. The films were stored in a dry environment for 30 and 100 days. The highest room temperature conductivity for the PVA:KOH film with weight percentage ratio of 1:0.67 during storage for 30 and 100 days were (8.5±0.2)×10 −4 and (1.3±0.1)×10 −7 S cm −1 , respectively. The conductivity-temperature behaviour after 30 and 100 days of storage of the alkaline polymer electrolytes is Arrhenian and liquid-like. The structural, morphological and thermal studies of the ASPE films are also presented in this paper.

Ni-MH battery based on plasticized alkaline solid polymer electrolytes

“…The conductivity value for unplasticized ASPE was (8.5±0.2)×10 −4 S cm −1 , but this high value mostly due to present of residue water solvent [7]. The corrected value of this unplasticized ASPE, after fully dried, is (1.3±0.1)×10 −7 S cm −1 [15]. It is likely that the conductivity of the electrolyte is improved by plasticized ASPE and consequently raises the OCV and discharge performance.…”

“…The solid electrolytes that have been used such as Sb 2 O 5 .nH 2 O [1,2] and tetramethylammonium hydroxide penthydrate [3]. Meanwhile, for the alkaline solid polymer electrolytes (ASPE), those that have been reported were polyacrylamide gel [4], poly(ethylene oxide) [5], copolymer of epichlorohydrin and ethylene oxide P(ECH-co-EO) [6], polyvinyl alcohol (PVA) [7][8][9][10], poly(acrylic acid) (PAA) [11] and PVA-PEO-glass fiber mat [12].…”

Influence of Temperature on Supercapacitor Components

“…To date, many polymer matrices have been used in polymer electrolytes for supercapacitors (e.g., PVA and PVC), among which PVA has attracted much interest because of outstanding solvent holding capacity, good thin-film formation capability, high mechanical strength, and wide temperature range in which they are stable in a gel phase [73]. Water-containing polymer electrolyte systems such as PVA-H 3 PO 4 [74,75], PVA-H 2 SO 4 [76,77], PVA-KOH [78,79], PVA-Na 2 SO 4 [80,81], and PVA-LiCl [82,83] have been frequently used as supercapacitor polymer electrolytes. The acidic solute-containing polymer electrolytes are usually called proton-conducting polymer electrolyte.…”

Conductivity studies of plasticized anhydrous PEO-KOH alkaline solid polymer electrolyte

“…The ion pairing will reduce the number of mobile ions [12]. Compared to the highest conductivity of the polyvinyl alcohol-KOH system [13], the conductivity of the PEO-KOH system is lower by one order.…”