Agar acts as cathode microskin to extend the cycling life of zn//α-mno2 batteries

Linqing Zuo; Haodong Sun; Xinhai Yuan; Juan Wen; Xi Chen; Shiyu Zhou; Yuping Wu; Teunis van Ree

doi:10.3390/ma14174895

Agar acts as cathode microskin to extend the cycling life of zn//α-mno2 batteries

Linqing Zuo, Haodong Sun, Xinhai Yuan, Juan Wen, Xi Chen, Shiyu Zhou, Yuping Wu, Teunis van Ree

School of energy science and engineering

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

The Zn/MnO2 battery is a promising energy storage system, owing to its high energy density and low cost, but due to the dissolution of the cathode material, its cycle life is limited, which hinders its further development. Therefore, we introduced agar as a microskin for a MnO2 electrode to improve its cycle life and optimize other electrochemical properties. The results showed that the agar-coating layer improved the wettability of the electrode material, thereby promoting the diffusion rate of Zn²⁺ and reducing the interface impedance of the MnO2 electrode material. Therefore, the Zn/MnO2 battery exhibited outstanding rate performance. In addition, the agar-coating layer promoted the reversibility of the MnO2/Mn²⁺ reaction and acted as a colloidal physical barrier to prevent the dissolution of Mn²⁺, so that the Zn/MnO2 battery had a high specific capacity and exhibited excellent cycle stability.

Original language	English
Article number	4895
Journal	Materials
Volume	14
Issue number	17
DOIs	https://doi.org/10.3390/ma14174895
State	Published - 1 Sep 2021

Keywords

Aqueous rechargeable battery
High discharge capacity
Manganese dioxide
Positive electrode

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title = "Agar acts as cathode microskin to extend the cycling life of zn//α-mno2 batteries",

abstract = "The Zn/MnO2 battery is a promising energy storage system, owing to its high energy density and low cost, but due to the dissolution of the cathode material, its cycle life is limited, which hinders its further development. Therefore, we introduced agar as a microskin for a MnO2 electrode to improve its cycle life and optimize other electrochemical properties. The results showed that the agar-coating layer improved the wettability of the electrode material, thereby promoting the diffusion rate of Zn2+ and reducing the interface impedance of the MnO2 electrode material. Therefore, the Zn/MnO2 battery exhibited outstanding rate performance. In addition, the agar-coating layer promoted the reversibility of the MnO2/Mn2+ reaction and acted as a colloidal physical barrier to prevent the dissolution of Mn2+, so that the Zn/MnO2 battery had a high specific capacity and exhibited excellent cycle stability.",

keywords = "Aqueous rechargeable battery, High discharge capacity, Manganese dioxide, Positive electrode",

author = "Linqing Zuo and Haodong Sun and Xinhai Yuan and Juan Wen and Xi Chen and Shiyu Zhou and Yuping Wu and Ree, {Teunis van}",

note = "Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

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doi = "10.3390/ma14174895",

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TY - JOUR

T1 - Agar acts as cathode microskin to extend the cycling life of zn//α-mno2 batteries

AU - Zuo, Linqing

AU - Sun, Haodong

AU - Yuan, Xinhai

AU - Wen, Juan

AU - Chen, Xi

AU - Zhou, Shiyu

AU - Wu, Yuping

AU - Ree, Teunis van

PY - 2021/9/1

Y1 - 2021/9/1

N2 - The Zn/MnO2 battery is a promising energy storage system, owing to its high energy density and low cost, but due to the dissolution of the cathode material, its cycle life is limited, which hinders its further development. Therefore, we introduced agar as a microskin for a MnO2 electrode to improve its cycle life and optimize other electrochemical properties. The results showed that the agar-coating layer improved the wettability of the electrode material, thereby promoting the diffusion rate of Zn2+ and reducing the interface impedance of the MnO2 electrode material. Therefore, the Zn/MnO2 battery exhibited outstanding rate performance. In addition, the agar-coating layer promoted the reversibility of the MnO2/Mn2+ reaction and acted as a colloidal physical barrier to prevent the dissolution of Mn2+, so that the Zn/MnO2 battery had a high specific capacity and exhibited excellent cycle stability.

AB - The Zn/MnO2 battery is a promising energy storage system, owing to its high energy density and low cost, but due to the dissolution of the cathode material, its cycle life is limited, which hinders its further development. Therefore, we introduced agar as a microskin for a MnO2 electrode to improve its cycle life and optimize other electrochemical properties. The results showed that the agar-coating layer improved the wettability of the electrode material, thereby promoting the diffusion rate of Zn2+ and reducing the interface impedance of the MnO2 electrode material. Therefore, the Zn/MnO2 battery exhibited outstanding rate performance. In addition, the agar-coating layer promoted the reversibility of the MnO2/Mn2+ reaction and acted as a colloidal physical barrier to prevent the dissolution of Mn2+, so that the Zn/MnO2 battery had a high specific capacity and exhibited excellent cycle stability.

KW - Aqueous rechargeable battery

KW - High discharge capacity

KW - Manganese dioxide

KW - Positive electrode

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U2 - 10.3390/ma14174895

DO - 10.3390/ma14174895

M3 - 文章

AN - SCOPUS:85113929769

SN - 1996-1944

VL - 14

JO - Materials

JF - Materials

IS - 17

M1 - 4895

ER -

Agar acts as cathode microskin to extend the cycling life of zn//α-mno2 batteries

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Keywords

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