Functional group engineered green Hydroxypropyl methylcellulose – Chitosan bio-polymer nanocomposite electrolyte with TiO2 filler and LiClO4 salt.

IF 3.3 4区材料科学 Q3 CHEMISTRY, PHYSICAL

Solid State Ionics Pub Date : 2025-08-01 DOI:10.1016/j.ssi.2025.116985

Mohan S. , R.F. Bhajantri , B.M. Nagabushana

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Abstract

The optimization of conductivity and stability of bio-solid polymer electrolytes through active functional groups for high-performance lithium batteries has not yet been fully realized. This study focus on fabrication and characterization of biocompatible hydroxypropyl methylcellulose-chitosan (HPMC-Cs) polymer electrolytes, which are plasticized with glycerol, TiO₂ nanofillers, and LiClO₄ salt. The research employs a solution casting technique, with a sequential optimization of the polymer blend, nanofiller, and salt concentration. XRD analysis confirmed the predominantly amorphous nature of the optimized electrolyte. ATR-FTIR studies revealed the various functional groups associated with polymer nanocomposite electrolyte and demonstrated interactions among components through band shifts. Thermal analysis conducted through thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) revealed a glass transition temperature of approximately 40.4 °C, with complete degradation occurring above 300 °C for the polymer electrolyte, comprising 7.5 wt% nanofillers and 12.5 wt% LiClO₄ salt. The optimized electrolyte exhibited the highest ionic conductivity of 0.129 mScm⁻¹, an electrochemical stability window of 3.35 V, maximum cationic transference number of 0.70, DC conductivity of 7.94 μS/cm, tensile strength of 3.14 MPa and a maximum strain of 150 %. The structural and electrical relaxation time corresponds to the relaxation behavior of polymer and ions found to decreased to 0.50 μs and 0.03 μs respectively while coupling index drops to 15.55. The evaluation of interfacial resistance over a period of 10 days demonstrates the impact of moisture on interfacial resistance, wherein the resistance initially decreased and subsequently increased and stabilized. These results underscore the potential of this bio-based polymer nanocomposite electrolyte for energy storage applications.

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以TiO2填料和LiClO4盐为填料的官能团工程化绿色羟丙基甲基纤维素-壳聚糖生物聚合物纳米复合电解质。

利用活性官能团优化高性能锂电池用生物固体聚合物电解质的导电性和稳定性尚未完全实现。本研究主要研究了生物相容性羟丙基甲基纤维素-壳聚糖（HPMC-Cs）聚合物电解质的制备和表征，该聚合物电解质由甘油、TiO2纳米填料和LiClO4盐增塑而成。该研究采用了溶液铸造技术，对聚合物混合物、纳米填料和盐浓度进行了顺序优化。XRD分析证实了优化后的电解质主要是非晶态的。ATR-FTIR研究揭示了与聚合物纳米复合电解质相关的各种官能团，并通过带移证明了组分之间的相互作用。通过热重分析（TGA）和差示扫描量热法（DSC）进行的热分析显示，聚合物电解质的玻璃化转变温度约为40.4°C，在300°C以上发生完全降解，聚合物电解质包括7.5 wt%的纳米填料和12.5 wt%的LiClO4盐。优化后的电解质离子电导率最高为0.129 mScm−1，电化学稳定窗口为3.35 V，最大阳离子转移数为0.70，直流电导率为7.94 μS/cm，抗拉强度为3.14 MPa，最大应变为150%。聚合物和离子的弛豫时间分别降至0.50 μs和0.03 μs，偶联指数降至15.55。10天的界面阻力评估表明，水分对界面阻力的影响，其中阻力开始下降，随后增加并稳定。这些结果强调了这种生物基聚合物纳米复合电解质在储能应用中的潜力。

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来源期刊

Solid State Ionics 物理-物理：凝聚态物理

CiteScore

6.10

自引率

3.10%

发文量

152

审稿时长

58 days

期刊介绍： This interdisciplinary journal is devoted to the physics, chemistry and materials science of diffusion, mass transport, and reactivity of solids. The major part of each issue is devoted to articles on: (i) physics and chemistry of defects in solids; (ii) reactions in and on solids, e.g. intercalation, corrosion, oxidation, sintering; (iii) ion transport measurements, mechanisms and theory; (iv) solid state electrochemistry; (v) ionically-electronically mixed conducting solids. Related technological applications are also included, provided their characteristics are interpreted in terms of the basic solid state properties. Review papers and relevant symposium proceedings are welcome.