程溪明, 习爽, 高兴伟. 面向锌离子电池的二氧化锰柔性电极制备及电化学性能研究?[J]. 工程科学学报. DOI: 10.13374/j.issn2095-9389.2024.01.22.003
引用本文: 程溪明, 习爽, 高兴伟. 面向锌离子电池的二氧化锰柔性电极制备及电化学性能研究?[J]. 工程科学学报. DOI: 10.13374/j.issn2095-9389.2024.01.22.003
Preparation and electrochemical properties of manganese dioxide flexible electrode for zinc ion batteries[J]. Chinese Journal of Engineering. DOI: 10.13374/j.issn2095-9389.2024.01.22.003
Citation: Preparation and electrochemical properties of manganese dioxide flexible electrode for zinc ion batteries[J]. Chinese Journal of Engineering. DOI: 10.13374/j.issn2095-9389.2024.01.22.003

面向锌离子电池的二氧化锰柔性电极制备及电化学性能研究?

Preparation and electrochemical properties of manganese dioxide flexible electrode for zinc ion batteries

  • 摘要: 二氧化锰(MnO2)作为锌离子电池的常用正极材料,因其在自然界中储量丰富、安全性好、理论容量高而备受关注。制备高性能锌离子电池的关键问题之一是构造具有稳定微观结构的阴极。本文选用高柔性、导电性的碳布(CC)作为基底,分别使用电化学沉积法和还原沉积法制备了碳布@二氧化锰(CC@MnO2)阴极,并进一步组装扣式锌离子电池。测试结果表明,基于还原沉积法的Zn//CC@MnO2电池具备出色的储锌性能(电流密度在0.1 A·g-1时能提供最大为291 mAh·g-1的放电比容量)、能量密度(485.7 Wh·kg-l)和循环稳定性(在1 A·g-1电流密度下进行1000次循环后,容量保持率为90.48%,库伦效率更是高达99.87%)。本文深入探讨了基于还原沉积法的CC@MnO2电极优化制备工艺,为高性能锌离子电池的开发提供了重要的参考依据。

     

    Abstract: Manganese dioxide (MnO2), a common cathode material for zinc ion batteries, has attracted much attention because of its abundant reserves in nature, good safety and high theoretical capacity. One of the key issues in the preparation of high-performance zinc ion batteries is the construction of cathodes with stable microstructures. In this paper, highly flexible and conductive carbon cloth (CC) was selected as the substrate, and carbon cloth@manganese dioxide (CC@MnO2) cathodes were prepared using electrochemical deposition and reduction deposition methods, respectively, and further assembled into button-type zinc ion batteries. The test results show that the Zn//CC@MnO2 battery based on the reduction deposition method possesses excellent zinc storage performance (current density at 0.1 A·g-1 can provide a maximum discharge specific capacity of 291 mAh·g-1), energy density (485.7 Wh·kg-l) and cycling stability (capacity retention after 1000 cycles at 1 A·g-1 current density of (90.48%, and the Coulomb efficiency is as high as 99.87%). In this paper, the optimized preparation process of CC@MnO2 electrodes based on reduction deposition method is discussed in depth, which provides an important reference for the development of high-performance Zn-ion batteries.

     

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