Ammonium ion intercalation and oxygen-rich vacancies in birnessite-type MnO<sub>2</sub> for supercapacitors and oxygen evolution applications

Liu, Juyin; Ren, Xiaoze; Gao, Yanfang; Liu, Ling

doi:10.1039/d4nj02629b

New J. Chem.

2024

DOI: 10.1039/d4nj02629b

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Ammonium ion intercalation and oxygen-rich vacancies in birnessite-type MnO₂ for supercapacitors and oxygen evolution applications

Juyin Liu,

Xiaoze Ren,

Yanfang Gao

et al.

Abstract: Defect engineering is an effective strategy to improve the electrochemical and electrocatalytic properties of transition metal oxide-based electrode materials. In this work, NH4+ ions intercalated MnO2 nanoflowers (C-A-MnO2) were prepared...

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Morphology Modulation of ZnMn2O4 Nanoparticles Deposited In Situ on Carbon Cloth for Supercapacitors

Li,

Feng,

Zhou

et al. 2024

Metals

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As a typical spinel structure material, ZnMn2O4 has been widely researched in the field of electrode materials. However, ZnMn2O4 nanoparticles as electrode materials for supercapacitors have the disadvantages of low conductivity, inferior structural integrity, and easy aggregation, resulting in unsatisfying electrochemical performance. In this work, we use a hydrothermal method and high-temperature calcination to deposit ZnMn2O4 nanoparticles on carbon cloth and explore the influence of hydrothermal reaction time on the deposition morphology and distribution of ZnMn2O4 nanoparticles on carbon cloth. The deposition process of ZnMn2O4 nanoparticles on carbon cloth was analyzed, and a ZMO-9 electrode was deduced to be the most suitable electrode for supercapacitors. A series of electrochemical performance tests show that the ZMO-9 electrode has excellent specific capacitance (specific capacity) (499 F·g−1 (299.4 C·g−1) at a current density of 1 A·g−1) and rate performance (75% capacitance retention at a current density of 12 A·g−1). The assembled asymmetric supercapacitor has an energy density of 46.6 Wh·kg−1 when the power density is 800.1 W·kg−1. This work provides a reference for the structural design of ZnMn2O4 supercapacitor electrode materials and the improvement of electrochemical properties.

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Morphology Modulation of ZnMn2O4 Nanoparticles Deposited In Situ on Carbon Cloth for Supercapacitors

Li,

Feng,

Zhou

et al. 2024

Metals

View full text Add to dashboard Cite

show abstract

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Ammonium ion intercalation and oxygen-rich vacancies in birnessite-type MnO₂ for supercapacitors and oxygen evolution applications

Abstract: Defect engineering is an effective strategy to improve the electrochemical and electrocatalytic properties of transition metal oxide-based electrode materials. In this work, NH4+ ions intercalated MnO2 nanoflowers (C-A-MnO2) were prepared...

Cited by 1 publication

References 75 publications

Morphology Modulation of ZnMn2O4 Nanoparticles Deposited In Situ on Carbon Cloth for Supercapacitors

Morphology Modulation of ZnMn2O4 Nanoparticles Deposited In Situ on Carbon Cloth for Supercapacitors

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Ammonium ion intercalation and oxygen-rich vacancies in birnessite-type MnO2 for supercapacitors and oxygen evolution applications

Abstract: Defect engineering is an effective strategy to improve the electrochemical and electrocatalytic properties of transition metal oxide-based electrode materials. In this work, NH4+ ions intercalated MnO2 nanoflowers (C-A-MnO2) were prepared...

Cited by 1 publication

References 75 publications

Morphology Modulation of ZnMn2O4 Nanoparticles Deposited In Situ on Carbon Cloth for Supercapacitors

Morphology Modulation of ZnMn2O4 Nanoparticles Deposited In Situ on Carbon Cloth for Supercapacitors

Contact Info

Product

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Ammonium ion intercalation and oxygen-rich vacancies in birnessite-type MnO₂ for supercapacitors and oxygen evolution applications