Development of magnesium-ion-conducting solid electrolytes from plant gum for magnesium-ion batteries

IF 2.6 4区化学 Q3 CHEMISTRY, PHYSICAL

Ionics Pub Date : 2025-05-19 DOI:10.1007/s11581-025-06380-4

Vengadesh Krishna M, S Selvasekarapandian, Malaichamy Ilanchelian

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Abstract

Naturally abundant magnesium-based metal batteries hold significant promise for addressing future energy demands. In the pursuit of sustainable electrochemical device development, biomaterial-based polymer electrolytes have garnered increasing attention. Plant exudates have emerged as a promising source for solid polymer electrolytes in various battery applications over the past decade. The gum of Moringa oleifera (MG) contains several polar groups within its polysaccharide structure, including D-glucuronic acid, L-mannose, and L-rhamnose. This study investigates the development of magnesium-ion-conducting biomaterial electrolytes by incorporating magnesium perchlorate Mg(ClO₄)₂ at varying weight percentages into Moringa oleifera gum using a solution casting method. The resulting membranes were characterized using X-ray diffraction (XRD), differential scanning calorimetry (DSC), AC impedance spectroscopy, linear sweep voltammetry (LSV), and cyclic voltammetry (CV). XRD analysis revealed that the membrane composed of 1 g MG + 0.70 wt% Mg(ClO₄)₂ (designated MGMC-4) exhibited a high degree of amorphous character. DSC analysis of MGMC-4 showed a low glass transition temperature of 133.22 °C. AC impedance spectroscopy demonstrated an increase in Mg²⁺ ionic conductivity with increasing Mg(ClO₄)₂ concentration, reaching a maximum conductivity of (1.26 ± 0.04) × 10⁻² S cm⁻¹ for MGMC-4. The MGMC-4 membrane exhibited an electrochemical stability window of 2.91 V and demonstrated good cycling stability within a potential range of − 2.5 to + 2.5 V for 64 cycles. A primary magnesium-ion battery was assembled using MGMC-4 as the electrolyte in the configuration Mg|MGMC-4|MnO₂-graphite. This battery exhibited a promising open-circuit potential of up to 1.91 V and reliable load discharge performance across a wide resistance range (100 kΩ to 15 Ω). Furthermore, the battery successfully powered a red LED for 480 continuous hours.

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镁离子电池用植物树胶导电镁离子固体电解质的研制

天然丰富的镁基金属电池为解决未来的能源需求带来了巨大的希望。在追求电化学器件可持续发展的过程中，基于生物材料的聚合物电解质得到了越来越多的关注。在过去的十年中，植物渗出液已成为固体聚合物电解质在各种电池应用中的一个有前途的来源。辣木胶（MG）的多糖结构中含有几个极性基团，包括d -葡萄糖醛酸、l -甘露糖和l -鼠李糖。本研究采用溶液铸造法将不同重量百分比的高氯酸镁Mg(ClO4)2掺入辣木胶中，研究了镁离子导电生物材料电解质的制备。采用x射线衍射（XRD）、差示扫描量热法（DSC）、交流阻抗谱、线性扫描伏安法（LSV）和循环伏安法（CV）对所得膜进行了表征。XRD分析表明，由1 g MG + 0.70 wt% MG (ClO4)2 （mmc -4）组成的膜具有高度的非晶态特征。DSC分析表明MGMC-4的玻璃化转变温度较低，为133.22℃。交流阻抗谱表明，Mg2+离子电导率随Mg(ClO4)2浓度的增加而增加，MGMC-4的电导率最大达到（1.26±0.04）× 10−2 S cm−1。MGMC-4膜的电化学稳定窗口为2.91 V，在−2.5 ~ + 2.5 V的电位范围内循环64次，具有良好的稳定性。以MGMC-4为电解质，以Mg|MGMC-4| mno2 -石墨为结构，组装了一次镁离子电池。该电池具有高达1.91 V的开路电势，在宽电阻范围（100 kΩ至15 Ω）内具有可靠的负载放电性能。此外，电池成功地为红色LED连续供电480小时。

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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.