A free-standing CaO infused PVdF-HFP/PMMA polymer-nanocomposite as solid-state electrolytes for energy storage applications

IF 2.4 4区化学 Q3 CHEMISTRY, PHYSICAL

Ionics Pub Date : 2024-07-31 DOI:10.1007/s11581-024-05738-4

Vijaya B, Usha Rani M

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Abstract

Energy storage devices play a crucial role in all kinds of electronic devices. Rechargeable lithium-ion batteries have run across problems such as energy density, toughness, and safety. In order to conquer these hindrances, in this work, a novel solid-state polymer electrolyte for lithium-ion batteries was synthesized by blending polymethyl methacrylate (PMMA) in poly (vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP) with constant weight percent of ethylene carbonate (EC) and lithium bis (trifluoro methane sulfonyl) imide (LiTFSI), and different concentrations of calcium oxide (CaO). The composite polymer electrolytes (CPEs) (PVdF-HFP:PMMA:LiTFSI:EC:CaO) were fabricated using the solution casting technique. Powder XRD reveals enhancement in intensity with increasing CaO content. FTIR shows the interaction between the polymer-salt matrix. Among the analyzed films, PVdF-HFP:PMMA:LiTFSI:EC:CaO (10 wt.%) exhibits high ionic conductivity (10^–4 S/cm) and good electrochemical (4 V) and thermal stability (350℃) which makes it suitable for solid-state electrolyte as a separator in energy storage applications.

Graphical Abstract

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注入 CaO 的独立 PVdF-HFP/PMMA 聚合物纳米复合材料作为固态电解质用于储能应用

储能设备在各种电子设备中发挥着至关重要的作用。可充电锂离子电池一直面临着能量密度、韧性和安全性等问题。为了克服这些问题，本研究通过在聚（偏氟乙烯-共六氟丙烯）（PVdF-HFP）中混入聚甲基丙烯酸甲酯（PMMA）、恒定重量百分比的碳酸乙烯（EC）和双（三氟甲烷磺酰）亚胺锂（LiTFSI）以及不同浓度的氧化钙（CaO），合成了一种用于锂离子电池的新型固态聚合物电解质。复合聚合物电解质（CPEs）（PVdF-HFP:PMMA:LiTFSI:EC:CaO）是利用溶液浇铸技术制造的。粉末 XRD 显示，随着 CaO 含量的增加，其强度也在增强。傅立叶变换红外光谱显示了聚合物-盐基质之间的相互作用。在分析的薄膜中，PVdF-HFP:PMMA:LiTFSI:EC:CaO（10 wt.%）具有较高的离子电导率（10-4 S/cm）、良好的电化学稳定性（4 V）和热稳定性（350℃），因此适合用作储能应用中的固态电解质分离器。

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来源期刊

Ionics 化学-电化学

CiteScore

5.30

自引率

7.10%

发文量

427

审稿时长

2.2 months

期刊介绍： Ionics is publishing original results in the fields of science and technology of ionic motion. This includes theoretical, experimental and practical work on electrolytes, electrode, ionic/electronic interfaces, ionic transport aspects of corrosion, galvanic cells, e.g. for thermodynamic and kinetic studies, batteries, fuel cells, sensors and electrochromics. Fast solid ionic conductors are presently providing new opportunities in view of several advantages, in addition to conventional liquid electrolytes.