Gel-Polymer Electrolyte-Based High-Performance Zn-Ion Batteries with Vanadium-Oxide Cathode Material

IF 2.8 4区化学 Q3 CHEMISTRY, PHYSICAL Electrocatalysis Pub Date : 2024-12-26 DOI:10.1007/s12678-024-00922-6

Deepika Choudhary, Preeti Mahto, Vivek Kumar, Ritu Bala, Rajnish Dhiman

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Abstract

Zn-ion batteries (ZIBs) are gaining attention due to their low cost, high capacity and efficiency, and strong cycling stability; nevertheless, further research is required to establish suitable cathode materials for the intercalation of Zn ions. Due to the layered structure, vanadium oxide–based materials are considered promising cathode materials of ZIB devices using gel polymer electrolytes (GPEs). The GPEs are considered a good alternative to liquid electrolytes due to their flexibility, leakage-free nature, and reduced Zn corrosion in Zn-based batteries. This work presents a carboxymethylcellulose and polyvinyl alcohol polymer matrix-based gel polymer electrolyte for applications in ZIBs for the first time. The polymer matrix shows an uptake of 150 wt% after immersion in 2 M ZnSO₄ electrolyte solution for 50 h. The as synthesized GPE has an ionic conductivity of 0.6 × 10⁻² cm⁻¹Ω⁻¹ and a thickness of 120 µm. The electrochemical results of the fabricated ZIB device fabricated using V₃O₇.H₂O cathode material exhibit a high specific capacity of 505 mAh/g at 0.1 A/g current density.

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含钒氧化物正极材料的凝胶-聚合物电解质基高性能锌离子电池

锌离子电池因其成本低、容量大、效率高、循环稳定性强等优点而备受关注；然而，建立合适的锌离子插层正极材料仍需进一步研究。由于其层状结构，氧化钒基材料被认为是使用凝胶聚合物电解质（gpe）的ZIB器件极具前景的正极材料。gpe被认为是液体电解质的一个很好的替代品，因为它具有灵活性，无泄漏的性质，并且在锌基电池中减少了锌的腐蚀。本文首次提出了一种应用于ZIBs的羧甲基纤维素和聚乙烯醇聚合物基质凝胶聚合物电解质。在2 M ZnSO4电解质溶液中浸泡50 h后，聚合物基体的吸收率为150 wt%。合成的GPE离子电导率为0.6 × 10−2 cm−1Ω−1，厚度为120µM。研究了用V3O7制备的ZIB器件的电化学性能。在0.1 a /g电流密度下，H2O阴极材料的比容量高达505 mAh/g。图形抽象

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来源期刊

Electrocatalysis CHEMISTRY, PHYSICAL-ELECTROCHEMISTRY

CiteScore

4.80

自引率

6.50%

发文量

审稿时长

>12 weeks

期刊介绍： Electrocatalysis is cross-disciplinary in nature, and attracts the interest of chemists, physicists, biochemists, surface and materials scientists, and engineers. Electrocatalysis provides the unique international forum solely dedicated to the exchange of novel ideas in electrocatalysis for academic, government, and industrial researchers. Quick publication of new results, concepts, and inventions made involving Electrocatalysis stimulates scientific discoveries and breakthroughs, promotes the scientific and engineering concepts that are critical to the development of novel electrochemical technologies. Electrocatalysis publishes original submissions in the form of letters, research papers, review articles, book reviews, and educational papers. Letters are preliminary reports that communicate new and important findings. Regular research papers are complete reports of new results, and their analysis and discussion. Review articles critically and constructively examine development in areas of electrocatalysis that are of broad interest and importance. Educational papers discuss important concepts whose understanding is vital to advances in theoretical and experimental aspects of electrochemical reactions.