Conductivity and discharge characteristics of polyblend (PVP + PVA + KIO3) electrolyte

IF 5.4 2区医学 Q2 MATERIALS SCIENCE, BIOMATERIALS ACS Biomaterials Science & Engineering Pub Date : 2003-03-12 DOI:10.1016/S0378-7753(02)00582-7

Ch.V Subba Reddy, A.K Sharma, V.V.R Narasimha Rao

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引用次数: 84

Abstract

Films of an ion conducting, polyblend electrolyte based on (polyvinyl pyrrolidone (PVP)+polyvinyl alcohol (PVA)) complexed with KIO₃ are prepared by a solution–cast technique. Measurements of dc conductivity and transference number are made to investigate the order of conductivity and the charge transport in this polyblend electrolyte. Transference number values show that the charge transport in this electrolyte is predominantly due to ions (t_ion=0.97). The magnitude of conductivity increases with increase in the concentration of the salt and temperature. Using this electrolyte, electrochemical cells are fabricated and their discharge characteristics are studied under different loads. The results show that KIO₃ polyblend electrolytes offer interesting alternatives to other solid-state battery systems. The electrochemical decomposition potential (ECDP) is determined for the polyblend electrolyte. From the ECDP studies, the values of open-circuit voltage (OCV) are calculated and are in good agreement with those obtained from discharge studies.

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聚共混(PVP + PVA + KIO3)电解质的电导率和放电特性

采用溶液浇铸法制备了聚乙烯醇(PVP)+聚乙烯醇(PVA)与KIO3络合的离子导电共混电解质薄膜。通过直流电导率和传递数的测量，研究了该共混电解质的电导率顺序和电荷输运。转移数值表明，该电解质中的电荷传输主要是由离子引起的(离子=0.97)。电导率的大小随盐浓度和温度的增加而增加。利用该电解液制备了电化学电池，并对其在不同负载下的放电特性进行了研究。结果表明，KIO3共混电解质为其他固态电池系统提供了有趣的替代品。测定了共混电解质的电化学分解电位(ECDP)。从ECDP研究中，计算了开路电压(OCV)的值，并与放电研究中得到的值很好地一致。

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来源期刊

ACS Biomaterials Science & Engineering Materials Science-Biomaterials

CiteScore

10.30

自引率

3.40%

发文量

413

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