盐浸法提高锂离子电池用聚乙烯醇复合聚合物电解质性能

IF 1.2 Q3 MULTIDISCIPLINARY SCIENCES

Journal of Physical Science Pub Date : 2022-11-30 DOI:10.21315/jps2022.33.3.3

C. Rina Ratri, Q. Sabrina, T. Lestariningsih, Salsabila Zakiyyah

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引用次数: 0

摘要

采用溶液浇铸法制备了聚乙烯醇(PVA)复合膜作为锂离子电池的隔膜兼电解质。PVA的亲水性有助于用去离子水代替易燃、有毒的溶剂。在膜中掺入硼酸锂(LiBOB)电解质盐，形成复合聚合物电解质(CPE)的柔性自立膜。为了进一步提高离子电导率，将CPE膜浸入溶解在去离子水中的1M LiBOB盐中。整齐的聚乙烯醇膜在任何有水的溶液中都会立即溶解;引入LiBOB电解质盐剥夺了氢键，使其转变为不溶性CPE膜。EIS测量结果表明，盐浸泡使CPE膜的离子电导率提高了4个数量级，室温下从4.77×10-7 S/cm提高到1.93×10-3 S/cm。

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Performance Enhancement of Poly (Vinyl Alcohol) Composite Polymer Electrolyte for Li-Ion Battery Through Salt Immersion Process

Poly (vinyl alcohol) (PVA) composite membrane as separator-cum-electrolyte for li-ion battery was prepared via solution casting method. Hydrophilicity of PVA helped to substitute flammable, toxic solvents with deionised water. Lithium bis(oxalato) borate (LiBOB) electrolyte salt was incorporated in the membrane to form flexible self-standing membrane of composite polymer electrolyte (CPE). To further enhance the ionic conductivity, CPE membrane was immersed in 1M LiBOB salt dissolved in deionised water. Neat PVA membrane would have been dissolved instantly in any solution involving water; introduction of LiBOB electrolyte salt deprived the hydrogen bond which transform it into an insoluble CPE membrane. EIS measurement showed that salt immersion boosted the CPE membrane ionic conductivity by four orders of magnitude, from 4.77×10–7 S/cm to 1.93×10–3 S/cm at room temperature.

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来源期刊

Journal of Physical Science Physics and Astronomy-Physics and Astronomy (all)

CiteScore

1.70

自引率

0.00%

发文量

期刊介绍： The aim of the journal is to disseminate latest scientific ideas and findings in the field of physical sciences among scientists in Malaysia and international regions. This journal is devoted to the publication of articles dealing with research works in Chemistry, Physics and Engineering. Review articles will also be considered. Manuscripts must be of scientific value and will be submitted to independent referees for review. Contributions must be written in English and must not have been published elsewhere.