植物提取物添加剂对碱性锌-空气电池寄生反应的影响

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta Pub Date : 2024-11-06 DOI:10.1016/j.electacta.2024.145313

M.A. Deyab , Q. Mohsen

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引用次数: 0

摘要

锌空气电池具有高能量密度、经济实惠的价格和生态可持续性等特点，是一种前景广阔的电池技术。然而，寄生反应会降低电池的寿命和功效，是锌-空气电池潜在发展面临的主要挑战。为了减轻寄生反应，研究人员研究了甘草根提取物（GGRE）作为锌-空气电池氢气进化和腐蚀抑制剂的替代品。研究结果表明，GGRE 提取物的抑制能力随浓度的增加而增加，在 350 毫克/升 GGRE 提取物左右达到最高水平（75.6%）。根据极化数据，GGRE 提取物是一种混合型抑制剂，主要具有阴极效应。GGRE 提取物在 Zn 表面的吸附符合 Freundlich 等温线。与空白 Zn-KOH（354 mAh g-1）相比，含有 350 mg L-1 GGRE 提取物的电池具有最高的放电容量（533 mAh g-1）和最佳的循环性（500 次循环后保持率为 92.9%）。总体而言，GGRE 提取物可显著优化锌-空气电池的性能。

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Effect of plant extract additives on the parasitic reaction in alkaline Zn-air batteries

The battery's high energy density, economical price, and ecological sustainability of the Zn-air battery make it a bright future battery technology. However, parasitic reactions, which can diminish the battery's life cycle and efficacy, are the key challenges for potential development of Zn-air batteries. Glycyrrhiza glabra roots extract (GGRE) has been investigated as an alternative hydrogen gas evolution and corrosion inhibitor for Zn-air batteries in order to mitigate the parasitic reaction. The results obtained reveal that the inhibition capacity of the GGRE extract increases with concentration and reaches its highest level (75.6 %) around 350 mg l^-1 of GGRE extract. GGRE extract is a mixed type inhibitor with a predominately cathodic effect based on the polarization data. The GGRE extract adsorption on the Zn surface complies with Freundlich isotherm. In comparison to the blank Zn-KOH (354 mAh g^-1), the battery containing 350 mg l^-1 GGRE extract has the highest discharge capacity (533 mAh g^-1) and the best cyclability (92.9 % retention after 500 cycles). Overall, GGRE extract can significantly optimize the performance of Zn-air batteries.

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来源期刊

Electrochimica Acta 工程技术-电化学

CiteScore

11.30

自引率

6.10%

发文量

1634

审稿时长

41 days

期刊介绍： Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.