Molten salt synthesis of α-MnO2/Mn2O3 nanocomposite as a high-performance cathode material for aqueous zinc-ion batteries

Huang, Aixiang; Zhou, Weijun; Wang, Anran; Chen, Minfeng; Tian, Qinghua; Chen, Jizhang

doi:10.1016/j.jechem.2020.06.041

Cited by 69 publications

(32 citation statements)

References 54 publications

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“…Nevertheless, one of the primary obstacles hindering the development of aqueous rechargeable ZIBs is the lack of suitable cathode materials which can reversibly host Zn 2+ ions and maintain structural stability during the process of chargedischarge. 7,8 As a result, great efforts have been devoted to building high-performance ZIBs using inorganic compound cathodes such as manganese-based oxides, [9][10][11][12] vanadium-based oxides, [13][14][15] spinel-type materials [16][17][18] and Prussian blue analogues. [19][20][21] However, these inorganic electrodes were plagued by structural and chemical instabilities, unsatisfactory capacity, signicant capacity fading, and toxic elements in their components.…”

Section: Introductionmentioning

confidence: 99%

A carbonyl-rich covalent organic framework as a high-performance cathode material for aqueous rechargeable zinc-ion batteries

Zhao

Cao

et al. 2022

Chem. Sci.

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Section: Introductionmentioning

confidence: 99%

A carbonyl-rich covalent organic framework as a high-performance cathode material for aqueous rechargeable zinc-ion batteries

Zhao

Cao

et al. 2022

Chem. Sci.

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“…given their various open-framework crystal structures and multiple oxidation states of manganese. [8][9][10] Different from a-, b-, R-, gand l-MnO 2 , d-MnO 2 has a typical layered structure, which is more accessible to charge carriers (i.e., Zn 2+ and H + ) and contributes to higher diffusion rates. [11][12][13][14][15] Unfortunately, the intrinsic conductivity of d-MnO 2 is still unsatisfactory.…”

Section: Introductionmentioning

confidence: 99%

A two-electron transfer mechanism of the Zn-doped δ-MnO₂ cathode toward aqueous Zn-ion batteries with ultrahigh capacity

Suib¹,

Zhao²,

Fee³

et al. 2022

J. Mater. Chem. A

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“…However, only a few studies have been reported about the structural, morphological, thermal, and electrochemical characteristics of Ni-doped MnO 2 NPs by defect engineering at ambient conditions. Herein, we examined the influence of nickel doping on structural, morphological, thermal, and electrochemical characteristics of MnO 2 NPs prepared by a facile co-precipitation approach [53,54]. Moreover, the as-prepared samples were dried at 80 °C for 8 h to evaporate water and organic materials.…”

Section: Introductionmentioning

confidence: 99%

Influence of nickel doping on MnO2 nanoflowers as electrocatalyst for oxygen reduction reaction

2021

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Doping is promising strategy for the alteration of nanomaterials to enhance their optical, electrical, and catalytic activities. The development of electrocatalysts for oxygen reduction reactions (ORR) with excellent activity, low cost and durability is essential for the large-scale utilization of energy storage devices such as batteries. In this study, MnO2 and Ni-doped MnO2 nanowires were prepared through a simple co-perception technique. The influence of nickel concentration on electrochemical performance was studied using linear sweep voltammetry and cyclic voltammetry. The morphological, thermal, structural, and optical properties of MnO2 and Ni-doped MnO2 nanowires were examined by SEM, ICP-OES, FT-IR, XRD, UV–Vis, BET and TGA/DTA. Morphological analyses showed that pure MnO2 and Ni-doped MnO2 had flower-like and nanowire structures, respectively. The XRD study confirmed the phase transformation from ε to α and β phases of MnO2 due to the dopant. It was also noted from the XRD studies that the crystallite sizes of pure MnO2 and Ni-doped MnO2 were in the range of 2.25–6.6 nm. The band gaps of MnO2 and 0.125 M Ni-doped MnO2 nanoparticles were estimated to be 2.78 and 1.74 eV, correspondingly, which can be seen from UV–Vis. FTIR spectroscopy was used to determine the presence of functional groups and M–O bonds (M = Mn, Ni). The TGA/TDA examination showed that Ni-doping in MnO2 led to an improvement in its thermal properties. The cyclic voltammetry results exhibited that Ni-doped MnO2 nanowires have remarkable catalytic performance for ORR in 0.1 M KOH alkaline conditions. This work contributes to the facile preparation of highly active and durable catalysts with improved catalytic performance mainly due to the predominance of nickel. Article Highlights MnO2 and Ni-doped MnO2 nanowires were synthesized via a facile co-perception approach. Nickel doping in MnO2 induces the formation of wire-like nanostructures. Nickel doping enhances the electrochemical activity and thermal stability of MnO2 nanoflowers. The addition of nickel into MnO2 promoted the catalytic activity for oxygen reduction reaction. A higher catalytic activity was achieved in 0.125 M Ni-MnO2 nanowires. Graphic abstract

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Molten salt synthesis of α-MnO2/Mn2O3 nanocomposite as a high-performance cathode material for aqueous zinc-ion batteries

Cited by 69 publications

References 54 publications

A carbonyl-rich covalent organic framework as a high-performance cathode material for aqueous rechargeable zinc-ion batteries

A carbonyl-rich covalent organic framework as a high-performance cathode material for aqueous rechargeable zinc-ion batteries

A two-electron transfer mechanism of the Zn-doped δ-MnO₂ cathode toward aqueous Zn-ion batteries with ultrahigh capacity

Influence of nickel doping on MnO2 nanoflowers as electrocatalyst for oxygen reduction reaction

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Molten salt synthesis of α-MnO2/Mn2O3 nanocomposite as a high-performance cathode material for aqueous zinc-ion batteries

Cited by 69 publications

References 54 publications

A carbonyl-rich covalent organic framework as a high-performance cathode material for aqueous rechargeable zinc-ion batteries

A carbonyl-rich covalent organic framework as a high-performance cathode material for aqueous rechargeable zinc-ion batteries

A two-electron transfer mechanism of the Zn-doped δ-MnO2 cathode toward aqueous Zn-ion batteries with ultrahigh capacity

Influence of nickel doping on MnO2 nanoflowers as electrocatalyst for oxygen reduction reaction

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A two-electron transfer mechanism of the Zn-doped δ-MnO₂ cathode toward aqueous Zn-ion batteries with ultrahigh capacity