Surface functionalized silica nanofiber cross-linked guar gum as novel nanocomposite polymer gel electrolytes towards green energy storage solutions

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering B-advanced Functional Solid-state Materials Pub Date : 2024-10-23 DOI:10.1016/j.mseb.2024.117764

Himadree Sarmah , Karanika Sonowal , Unnati Bora , Bitupon Boruah , Dipjyoti Bora , Ankur Gogoi , Jayanta K. Sarmah , Utpal J. Mahanta , Lakshi Saikia , Madhuryya Deka

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Abstract

This work focuses on synthesizing and assessing guar gum (GG)-based cross-linked nanocomposite polymer gel electrolytes (NPGEs) as an innovative separator for environmentally friendly energy storage purposes. The synthesis procedure involves cross-linking Octadecyltrichlorosilane (OTS) functionalized SiO₂ nanofibers (f-SiO₂) with GG, followed by uptake of liquid electrolytes. Maximum ionic conductivity of 6.7 × 10^-3 Scm⁻¹ is achieved at 5 wt% f-SiO₂. XRD and XPS investigations show that nanofibers create conducting channels in NPGEs, improving ionic conductivity. The cross-linked NPGEs exhibit an outstanding electrochemical potential window of 4.8 V, enhanced lithium ion transference number (t₊) of 0.58, and enhanced compatibility at the interface with metal electrodes. The initial discharge capacity at 0.5C was measured to be 134 mAh g⁻¹ for Li|NPGE|LiFePO₄ cell in the first cycle and 125 mAh g⁻¹ after 50 cycles. The synthesized cross-linked NPGEs also show enhanced thermal and mechanical properties, as investigated by TGA and UTM analyses.

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表面功能化二氧化硅纳米纤维交联瓜尔胶作为新型纳米复合聚合物凝胶电解质，实现绿色能源存储解决方案

这项研究的重点是合成和评估瓜尔胶（GG）基交联纳米复合聚合物凝胶电解质（NPGEs），将其作为一种创新的分离器，用于环保型能源存储目的。合成过程包括将十八烷基三氯硅烷（OTS）功能化的二氧化硅纳米纤维（f-SiO2）与瓜尔胶交联，然后吸收液态电解质。当 f-SiO2 的重量百分比为 5 时，离子电导率达到最大值 6.7 × 10-3 Scm-1。XRD 和 XPS 研究表明，纳米纤维在 NPGE 中形成了导电通道，从而提高了离子导电率。交联的 NPGEs 具有 4.8 V 的出色电化学电位窗口，锂离子转移数 (t+) 提高到 0.58，与金属电极的界面兼容性增强。在 0.5C 下，锂|NPGE|LiFePO4 电池第一次循环的初始放电容量为 134 mAh g-1，50 次循环后为 125 mAh g-1。通过 TGA 和 UTM 分析，合成的交联 NPGE 还显示出更强的热性能和机械性能。

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来源期刊

Materials Science and Engineering B-advanced Functional Solid-state Materials 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.