Mesoporous amorphous binary Ru–Ti oxides as bifunctional catalysts for non-aqueous Li–O<sub>2</sub> batteries

Kim, Jisu; Jo, HeeGoo; Wu, Mihye; Yoon, Dae–Ho; Kang, Yongku; Jung, Ha‐Kyun

doi:10.1088/1361-6528/aa6132

Cited by 4 publications

(1 citation statement)

References 29 publications

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“…Mixed metal oxides : The combination of amorphous RuO 2 and amorphous TiO 2 , mixed with Super P carbon, acted as a bifunctional catalyst for Li–air batteries . The mesoporous amorphous Ru–Ti oxide displayed an ultrahigh capacity of 27 100 mAh g −1 with an overpotential of 1.2 V and a stable energy efficiency of 67% at 100 mA g −1 .…”

Section: Amo As Electrocatalyst For Energy Conversion and Storagementioning

confidence: 99%

Research Advances of Amorphous Metal Oxides in Electrochemical Energy Storage and Conversion

Yan

Abhilash

Tang

et al. 2018

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possess lower hardness, higher strength, higher elasticity, higher tensile strength, lower internal energy, higher interatomic forces, lower viscosity coefficient, larger surface area, higher chemical stability, and strong corrosion resistance compared with their crystalline counterparts. [1][2][3] Based on the anionic constituents, amorphous materials could be categorized as oxides, sulfides, phosphates, etc. Among them, amorphous metal oxide family is of great importance owing to its widespread applications in a variety of areas such as batteries, supercapacitors, electronics, conducting films, multilayered transistors, electrochromic displays, nonvolatile memories, and the like. [4][5][6] As the basic building blocks, metaloxide (M-O) polyhedra are responsible for the essential features of the electronic band structure in amorphous metal oxides (AMOs). [3] AMO materials differ from their crystalline counterparts in the arrangement of M-O polyhedra, in which a random network arrangement of distorted polyhedra with short-range ordering is presented rather than maintaining perfect periodicity. [7,8] The coordination number of the M-O polyhedra, namely, the number of anions bonded to the metal cation, constitutes a crucially decisive factor for the unique properties of AMOs. Multiple polyhedra are interconnected through different types of sharing configurations known as edge sharing, corner sharing, and face sharing of the oxygen atoms. The combination of different sharing geometries also affects the properties of AMOs. [9] In other words, AMOs are formed by the superposition of the distorted M-O polyhedra to form network arrays through a random package. Long-range structural disorder in the AMO reduces scattering mean free path, and the lack of grain boundaries makes the electronic properties identical within large areas. These unique characteristics make them suitable for flexible electronics such as flexible films, intervening layers, thin film transistors, etc. [10][11][12] In recent years, there are numerous reports pointing out the advantages of AMOs over the crystalline counterparts in many electrochemical applications. [13][14][15][16][17] For example, the inherent disorderliness in the structural arrangement and rich defects are evidenced to be highly constructive to improve the alkali ion diffusion through the lattice. [18,19] As for intercalation-type electrodes in lithium-ion batteries (LIBs), amorphous materials Amorphous metal oxides (AMOs) have aroused great enthusiasm across multiple energy areas over recent years due to their unique properties, such as the intrinsic isotropy, versatility in compositions, absence of grain boundaries, defect distribution, flexible nature, etc. Here, the materials engineering of AMOs is systematically reviewed in different electrochemical applications and recent advances in understanding and developing AMO-based high-performance electrodes are highlighted. Attention is focused on the important roles that AMOs play in various energy storage and conversion technologies...

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Section: Amo As Electrocatalyst For Energy Conversion and Storagementioning

confidence: 99%

Research Advances of Amorphous Metal Oxides in Electrochemical Energy Storage and Conversion

Yan

Abhilash

Tang

et al. 2018

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224

120

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Recent progress in hierarchically structured O2-cathodes for Li-O2 batteries

Gao

Cai

Wang

et al. 2018

Chemical Engineering Journal

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Nickel disulfide nanosheet as promising cathode electrocatalyst for long-life lithium–oxygen batteries

Song

Lee

et al. 2020

Energy Storage Materials

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Mesoporous amorphous binary Ru–Ti oxides as bifunctional catalysts for non-aqueous Li–O₂ batteries

Cited by 4 publications

References 29 publications

Research Advances of Amorphous Metal Oxides in Electrochemical Energy Storage and Conversion

Research Advances of Amorphous Metal Oxides in Electrochemical Energy Storage and Conversion

Recent progress in hierarchically structured O2-cathodes for Li-O2 batteries

Nickel disulfide nanosheet as promising cathode electrocatalyst for long-life lithium–oxygen batteries

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Mesoporous amorphous binary Ru–Ti oxides as bifunctional catalysts for non-aqueous Li–O2 batteries

Cited by 4 publications

References 29 publications

Research Advances of Amorphous Metal Oxides in Electrochemical Energy Storage and Conversion

Research Advances of Amorphous Metal Oxides in Electrochemical Energy Storage and Conversion

Recent progress in hierarchically structured O2-cathodes for Li-O2 batteries

Nickel disulfide nanosheet as promising cathode electrocatalyst for long-life lithium–oxygen batteries

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Product

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Mesoporous amorphous binary Ru–Ti oxides as bifunctional catalysts for non-aqueous Li–O₂ batteries