CuMn2O4 as a Dual Redox-Active Cathode Material for Aqueous Mg-Ion Batteries

IF 5.5 3区材料科学 Q2 CHEMISTRY, PHYSICAL

ACS Applied Energy Materials Pub Date : 2026-10-12 Epub Date: 2026-09-24 DOI:10.1021/acsaem.6c02170

Bo Liu, Yaohong Yang, Yixin Li, Fangyu Xiong, Dong Wang, Jili Yue, Guangsheng Huang

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Abstract

Manganese-based oxides are attractive cathode materials for aqueous magnesium-ion batteries (AMIBs) due to their high theoretical capacity, abundant resources, and environmental friendliness but suffer from poor conductivity, manganese dissolution, and structural degradation during cycling. In this work, CuMn₂O₄ is proposed as a dual redox-active cathode material for AMIBs. During discharge, lattice copper ions are extracted and in-situ reduced to metallic copper, which contributes to capacity and enhances electronic conductivity. Consequently, CuMn₂O₄ delivers highly enhanced capacity (211 mAh g⁻¹ at 100 mA g⁻¹) and cycling stability compared to monometallic Mn₃O₄. Moreover, the aqueous Mg∥CuMn₂O₄ full cell achieves an average discharge voltage of 1.80 V and stable cycling for over 50 cycles. This study confirms the feasibility of CuMn₂O₄ as a high-performance cathode material for AMIBs and provides insights for developing low-cost, high-performance multivalent-ion battery cathode materials.

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水镁离子电池双氧化还原活性正极材料CuMn2O4

锰基氧化物具有理论容量大、资源丰富、环境友好等优点，是水镁离子电池极具吸引力的正极材料，但在循环过程中存在电导率差、锰溶解、结构降解等缺点。在这项工作中，CuMn2O4被提出作为amib的双氧化还原活性阴极材料。在放电过程中，晶格铜离子被提取并原位还原为金属铜，这有助于提高容量和电子导电性。因此，与单金属Mn3O4相比，CuMn2O4提供了高度增强的容量（在100 mA g - 1时达到211 mAh g - 1）和循环稳定性。水溶液Mg∥CuMn2O4电池平均放电电压为1.80 V，可稳定循环50次以上。本研究证实了CuMn2O4作为amib高性能正极材料的可行性，为开发低成本、高性能的多价离子电池正极材料提供了思路。

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来源期刊

ACS Applied Energy Materials Materials Science-Materials Chemistry

CiteScore

10.30

自引率

6.20%

发文量

1368

期刊介绍： ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.