Flowerlike Co3O4 microspheres loaded with copper nanoparticle as an efficient bifunctional catalyst for lithium–air batteries

Yang, Wei; Salim, Jason; Ma, Chao; Ma, Zhaohui; Sun, Chunwen; Li, Jianqi; Chen, Liquan; Kim, Young‐Sik

doi:10.1016/j.elecom.2012.12.007

Cited by 109 publications

(45 citation statements)

References 16 publications

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“…The advantage of superior energy density is available due to the novel reaction mechanism (2Li + +O 2 +2e − ↔Li 2 O 2 ) associated with the reversible formation and decomposition of lithium peroxide (Li 2 O 2 ) products at the porous cathode matrix [2,3]. Unfortunately, crucial issues related to the instability of organic electrolytes, the reactivity of prevailing carbon matrix, and the sluggish kinetics of cathodic reactions lead to the present Li-O 2 batteries confronted with several major problems such as low round-trip efficiency, poor cyclability, and insufficient energy efficiency [4][5][6].…”

Section: Introductionmentioning

confidence: 98%

Ultrafine IrO2 nanoparticle-decorated carbon as an electrocatalyst for rechargeable Li–O2 batteries with enhanced charge performance and cyclability

Guo

Yuan

et al. 2014

J Solid State Electrochem

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Ultrafine iridium (IV) oxide (IrO 2 ) nanoparticles are homogeneously distributed on the surface of porous Ketjenblack (KB) carbon (IrO 2 /KB) via one-step hydrothermal approach, and the resulting nanocomposite is investigated as an electrocatalyst for nonaqueous Li-O 2 batteries. Transmission electron microscopy confirms the high dispersion of ultrafine IrO 2 particles with an average particle size of 1.47 nm. The IrO 2 /KB electrode exhibits remarkable catalytic activity towards oxygen evolution reaction (OER) as indicated by the voltammetric measurements. And, the IrO 2 /KB electrode decreases the recharge overpotential by ca. 400 and 200 mV compared to the electrodes with pure KB and a mechanical mixture of KB and pre-synthesized IrO 2 , respectively. Li-O 2 battery with IrO 2 /KB achieves high-capacity retention and stable cyclability, maintaining a long cycle life for 70 cycles without sharp decay under a limited dischargecharge depth of 500 mAh g −1 (ca. 1100 mAh g C −1). X-ray diffraction and scanning electron microscope analysis reveal that this excellent rechargeability is based on the reversible formation and decomposition of toroid-shaped lithium peroxide. Therefore, the uniform distribution of ultrafine IrO 2 particles, with extraordinary OER catalytic activity, on KB carbon enables the IrO 2 /KB to be a promising electrocatalyst for Li-O 2 batteries.

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Section: Introductionmentioning

confidence: 98%

Ultrafine IrO2 nanoparticle-decorated carbon as an electrocatalyst for rechargeable Li–O2 batteries with enhanced charge performance and cyclability

Guo

Yuan

et al. 2014

J Solid State Electrochem

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“…Great efforts have been devoted to developing cathode catalysts, such as noble metals, alloys, metal oxides, and functional doped-carbon materials. [7][8][9][10][11][12][13][14]Among the catalysts, platinum based catalysts show outstanding catalytic activity, attracting much attention of researchers. [7,[15][16][17][18][19] Li et al [18] fabricated the self-standing composites of Pt/CNTs supported on nickel foam as the cathode for lithium-O 2 batteries.…”

Section: Introductionmentioning

confidence: 99%

Systematic study on the discharge product of Pt-based lithium oxygen batteries

Xing

et al. 2016

Journal of Power Sources

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Lithium oxygen batteries have attracted much attention due to the high theoretical energy density. However, they suffer a large overpotential during oxygen evolution process and thus catalysts play a vital role in the reaction. Here, we systematically explored the influence of Pt-based nanoparticle catalysts on the discharge product Li 2 O 2. Because of the superior electrical conductivity and the strong binding with oxygen, Pt-based nanoparticles serve as active sites which are favorable for the growth of toroidal Li 2 O 2. We also found that the content and composition of Pt-based nanoparticle catalysts exert a significant influence on the electrochemical performance of lithiumoxygen batteries. The discharge products are composed of crystalline Li 2 O 2

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“…21,22 Besides, different kinds of catalyst materials, especially transition metal oxides and their composites, have been widely investigated. [23][24][25][26][27] Conventionally, the cathode is fabricated by loading the catalyst onto a porous current collector (e.g. carbon paper, [28][29][30] nickel-based composites [31][32][33][34] ) through casting of a slurry mixture comprising of the catalyst, conductive matrix (e.g.…”

Section: Introductionmentioning

confidence: 99%

A RuO₂ nanoparticle-decorated buckypaper cathode for non-aqueous lithium–oxygen batteries

et al. 2015

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We report a non-aqueous lithium-oxygen battery with its cathode made of a RuO2 nanoparticle-decorated buckypaper (weaved with carbon nanotubes). Compared with conventionally slurry-formed cathodes, the present cathode has two striking features: i) no binder is required, avoiding the problems of surface-loss and instability due to the introduction of a polymeric binder; and ii) no additional current collector is needed, increasing the practical specific capacity. The present battery demonstrates a discharge plateau of 2.56 V and a charge plateau of 4.10 V at a current density of 0.4 mA cm -2 , with a discharge capacity of 4.72 mAh cm -2 (1150 mAh gcathode -1 ). It is also shown that at a fixed capacity of 2.0 mAh cm -2 , the energy efficiency of the battery reaches 71.2%, 65.4%, and 58.0% at the current densities of 0.2, 0.4, and 0.8 mA cm -2 , respectively. Furthermore, the battery is able to operate for 50 cycles at a fixed capacity of 1.0 mAh cm -2 , showing good cycling stability. The results suggest that the RuO2 nanoparticle-decorated buckypaper cathode offers the promise for a high-practical specific capacity, high-energy efficiency, and stable electrode in non-aqueous lithium-oxygen batteries.

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Flowerlike Co3O4 microspheres loaded with copper nanoparticle as an efficient bifunctional catalyst for lithium–air batteries

Cited by 109 publications

References 16 publications

Ultrafine IrO2 nanoparticle-decorated carbon as an electrocatalyst for rechargeable Li–O2 batteries with enhanced charge performance and cyclability

Ultrafine IrO2 nanoparticle-decorated carbon as an electrocatalyst for rechargeable Li–O2 batteries with enhanced charge performance and cyclability

Systematic study on the discharge product of Pt-based lithium oxygen batteries

A RuO₂ nanoparticle-decorated buckypaper cathode for non-aqueous lithium–oxygen batteries

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Flowerlike Co3O4 microspheres loaded with copper nanoparticle as an efficient bifunctional catalyst for lithium–air batteries

Cited by 109 publications

References 16 publications

Ultrafine IrO2 nanoparticle-decorated carbon as an electrocatalyst for rechargeable Li–O2 batteries with enhanced charge performance and cyclability

Ultrafine IrO2 nanoparticle-decorated carbon as an electrocatalyst for rechargeable Li–O2 batteries with enhanced charge performance and cyclability

Systematic study on the discharge product of Pt-based lithium oxygen batteries

A RuO2 nanoparticle-decorated buckypaper cathode for non-aqueous lithium–oxygen batteries

Contact Info

Product

Resources

About

A RuO₂ nanoparticle-decorated buckypaper cathode for non-aqueous lithium–oxygen batteries