Comparisons of heat treatment on the electrochemical performance of different carbons for lithium-oxygen cells

Guan, Ping; Wang, Guixin; Luo, Chunhui; Yan, Kangping; Cairns, Elton J.; Hu, Xueshan

doi:10.1016/j.electacta.2014.02.079

Cited by 4 publications

(1 citation statement)

References 55 publications

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“…We have explored the charge transfer difference on the two electrodes with the help of impedance analysis. The impedance variation during discharge was recorded by electrochemical impedance spectroscopy (EIS). ,, All impedance analysis was carried out at a dc bias at the open-circuit potential at different stages of discharge (Figure B,C). In the high frequency region, the intercept of the curve on the real impedance axis of a Nyquist plot reflects the Ohmic resistance.…”

Section: Resultsmentioning

confidence: 99%

Tuning the Morphology and Crystal Structure of Li₂O₂: A Graphene Model Electrode Study for Li–O₂ Battery

Yang

Zhang

Wang

et al. 2016

ACS Appl. Mater. Interfaces

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The performance and the cyclability of the Li-O2 batteries are strongly affected by the morphology and crystal structure of Li2O2 produced during discharge. In order to explore the details of growth and electrochemical decomposition of Li2O2, and its relationship with the cell performance, graphene films were used as model carbon electrodes and compared with electrodeposited Pd nanoparticles (NPs) on graphene. Multiple methods, including transmission/scanning electron microscopy (TEM/SEM), Raman spectroscopy, electrochemical impedance spectroscopy (EIS), and coin cell charge/discharge test, were employed for material characterization and reaction monitoring. The results showed that the presence of Pd NPs significantly changed the growth, morphology, and crystal structure of Li2O2 and reduced the charge overpotential by 1060 mV. All of these changes are ascribed to the stronger binding energy between LiO2 and the Pd surface, resulting in the generation of amorphous Li2O2 with higher ionic conductivity of Li(+) and O2(2-), which in turn improve the cell charging performance.

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Section: Resultsmentioning

confidence: 99%

Tuning the Morphology and Crystal Structure of Li₂O₂: A Graphene Model Electrode Study for Li–O₂ Battery

Yang

Zhang

Wang

et al. 2016

ACS Appl. Mater. Interfaces

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The electrocatalytic properties of lithium copper composite in the oxygen reduction reaction

Farsak

Telli

Tezcan

et al. 2014

Electrochimica Acta

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Hierarchical porous nitrogen doped three-dimensional graphene as a free-standing cathode for rechargeable lithium-oxygen batteries

Zhang

Liu

et al. 2016

Electrochimica Acta

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Comparisons of heat treatment on the electrochemical performance of different carbons for lithium-oxygen cells

Cited by 4 publications

References 55 publications

Tuning the Morphology and Crystal Structure of Li₂O₂: A Graphene Model Electrode Study for Li–O₂ Battery

Tuning the Morphology and Crystal Structure of Li₂O₂: A Graphene Model Electrode Study for Li–O₂ Battery

The electrocatalytic properties of lithium copper composite in the oxygen reduction reaction

Hierarchical porous nitrogen doped three-dimensional graphene as a free-standing cathode for rechargeable lithium-oxygen batteries

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Comparisons of heat treatment on the electrochemical performance of different carbons for lithium-oxygen cells

Cited by 4 publications

References 55 publications

Tuning the Morphology and Crystal Structure of Li2O2: A Graphene Model Electrode Study for Li–O2 Battery

Tuning the Morphology and Crystal Structure of Li2O2: A Graphene Model Electrode Study for Li–O2 Battery

The electrocatalytic properties of lithium copper composite in the oxygen reduction reaction

Hierarchical porous nitrogen doped three-dimensional graphene as a free-standing cathode for rechargeable lithium-oxygen batteries

Contact Info

Product

Resources

About

Tuning the Morphology and Crystal Structure of Li₂O₂: A Graphene Model Electrode Study for Li–O₂ Battery

Tuning the Morphology and Crystal Structure of Li₂O₂: A Graphene Model Electrode Study for Li–O₂ Battery