A Rechargeable Neutral Hybrid Zn-Air/MnO2 Battery with High Energy Efficiency

IF 24.4 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Advanced Energy Materials Pub Date : 2025-06-12 DOI:10.1002/aenm.202501294

Yu Feng, Sha Luo, An Duan, Ming Li, Bao Zhang, Wei Sun

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Abstract

Neutral rechargeable Zn-air batteries (ZABs) offer high energy density, safety, and cost-effectiveness. However, energy efficiency is limited by sluggish oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) kinetics, along with the formation of low-conductivity discharge products. Here, a high-efficiency neutral hybrid Zn-air/MnO₂ battery (ZAMB) is introduced, where MnO₂ is in situ electrodeposited on the air cathode in a ZnSO₄-MnSO₄ electrolyte. The electrodeposited MnO₂ acts as the active material for the Zn-MnO₂ battery and as a dynamically formed catalyst for the ORR/OER processes. In situ pH and X-ray diffraction (XRD) analyses verify its effect in promoting the reversible formation and decomposition of low-conductivity discharge products. The hybrid ZAMB achieves an energy efficiency of 68%, a significant increase from 38% in conventional ZABs, and exhibits better cycling stability, operating reliably over 100 h at a current density of 1 mA cm⁻² and up to 300 h at 0.1 mA cm⁻². A rechargeable pouch-type ZAMB delivering a fixed capacity of 1 Ah demonstrates the practical potential of this hybrid design. This work integrates multiple electrochemical reactions in a single hybrid battery, improving energy efficiency, longevity, and the performance of metal-air batteries with low-conductivity discharge products.

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一种高能效可充电中性混合锌空气/二氧化锰电池

中性可充电锌空气电池（ZABs）具有高能量密度、安全性和成本效益。然而，能源效率受到缓慢的氧还原反应（ORR）和析氧反应（OER）动力学以及低电导率放电产物的形成的限制。本文介绍了一种高效中性混合zn -空气/MnO2电池（ZAMB），其中MnO2在ZnSO4-MnSO4电解质中原位电沉积在空气阴极上。电沉积MnO2作为锌-MnO2电池的活性物质和ORR/OER过程的动态形成催化剂。原位pH和x射线衍射（XRD）分析验证了其促进低电导率放电产物可逆形成和分解的作用。混合zab的能量效率达到68%，比传统zab的38%有显著提高，并且具有更好的循环稳定性，在1 mA cm - 2电流密度下可靠运行100小时，在0.1 mA cm - 2电流密度下可靠运行300小时。提供1 Ah固定容量的可充电袋式ZAMB展示了这种混合设计的实用潜力。这项工作将多个电化学反应集成在一个混合电池中，提高了低电导率放电产物金属-空气电池的能源效率、寿命和性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advanced Energy Materials CHEMISTRY, PHYSICAL-ENERGY & FUELS

CiteScore

41.90

自引率

4.00%

发文量

889

审稿时长

1.4 months

期刊介绍： Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small. With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics. The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.