高性能层状二氧化锰正极材料在水系锌离子电池中的应用
Application of High-Performance Layered Manganese Dioxide Cathode Materials in Aqueous Zinc-Ion Batteries
DOI: 10.12677/ms.2026.162022, PDF,    科研立项经费支持
作者: 刘梦成, 史继安, 李海峰, 朱金博, 欧俊科*：成都大学机械工程学院，四川 成都
关键词: 锌离子电池；δ-MnO2；正极材料；电化学性能；Zinc-Ion Batteries； δ-MnO2； Cathode Materials； Electrochemical Performance
摘要: 水系锌离子电池具备较高的能量密度，同时兼具经济可行性与生态环保性，近年来已成为科研领域的研究热点。在各类正极材料中，MnO2凭借理论容量高、工作电势适宜、制备工艺简便以及锰资源储量丰富等优势脱颖而出。本研究开发出一种高效的一步法合成工艺，成功制备出形貌可控、粒径分布均匀的层状δ-MnO2纳米颗粒。微观表征结果显示，所制备的δ-MnO2纳米颗粒具有清晰规整的颗粒表面结构，该结构能够显著增强电极与电解液间的界面作用效果。电化学性能测试表明，以δ-MnO2为正极的水系锌离子电池表现出了优秀的电化学性能，在0.1 A/g的电流密度下，比容量达343 mAh/g，在2.0 A/g的高电流密度下，仍能保持228 mAh/g的容量。电池在1.0 A/g电流密度下循环1800次后，容量保持率为84.6%，在2.0 A/g电流密度下循环2500次后，容量保持率依旧可达81.6%，仍展现出良好的容量保持能力。上述优异性能充分证实，δ-MnO2可作为一种高容量、长寿命的正极候选材料，在水系锌离子电池领域具有广阔的应用前景。
Abstract: The high energy density of aqueous zinc-ion batteries (ZIBs) has attracted significant research attention, economic viability, and ecological sustainability. Among various cathode options, MnO2 stands out due to its substantial theoretical capacity, favorable operating potential, straightforward preparation process, and the widespread availability of manganese resources. This study introduces an efficient single-step synthesis protocol for producing layered δ-MnO2 nanoparticles with controlled morphology and homogeneous size distribution. Microscopic analysis indicates that the prepared δ-MnO2 NPs display a well-defined particulate surface texture that promotes effective interfacial interaction. The δ-MnO2 cathode exhibits outstanding overall electrochemical performance, delivering a specific capacity of 343 mAh/g at 0.1 A/g and maintaining 228 mAh/g at a high rate of 2.0 A/g. It also demonstrates excellent cycling durability, sustaining high capacity retention of 84.6% after 1,800 cycles (1.0 A/g) and 81.6% after 2,500 cycles (2.0 A/g). This performance validates δ-MnO2 nanomaterials as a durable, high-capacity cathode for promising aqueous zinc battery applications.
文章引用：刘梦成, 史继安, 李海峰, 朱金博, 欧俊科. 高性能层状二氧化锰正极材料在水系锌离子电池中的应用[J]. 材料科学, 2026, 16(2): 51-62. https://doi.org/10.12677/ms.2026.162022

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