Synthesis of flexible pure graphene papers and utilization as free standing cathodes for lithium-air batteries

Özcan, Şeyma; Çetinkaya, Tuğrul; Tokur, Mahmud; Algül, Hasan; Guler, Mehmet Oguz; Akbulut, Hatem

doi:10.1016/j.ijhydene.2016.02.044

Cited by 22 publications

(16 citation statements)

References 30 publications

(27 reference statements)

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“…The crystal structures of the produced nanopowders and composites were determined by XRD. In Figure A, rGO peak obtained by reduction of the graphene oxide was observed as a broad peak with the (002) plane of carbon (JCPDS, 00‐026‐1080) at about 26° . The XRD peaks of ZnO nanoparticles display (100), (002), and (101) planes of hexagonal ZnO (JCPDS, 36‐1451) .…”

Section: Resultsmentioning

confidence: 99%

“…In Figure 3A, rGO peak obtained by reduction of the graphene oxide was observed as a broad peak with the (002) plane of carbon (JCPDS, 00-026-1080) at about 26°. 13 The XRD peaks of ZnO nanoparticles display (100), (002), and (101) planes of hexagonal ZnO (JCPDS, 36-1451). 15 The peaks of the produced SnO 2 nanoparticles belong to the cassiterite crystal structure (JCPDS, 00-041-1445).…”

Section: Resultsmentioning

confidence: 99%

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Graphene-based architectures of tin and zinc oxide nanocomposites for free-standing binder-free Li-ion anodes

2018

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Summary Free‐standing, flexible, and binderless binary ZnO‐reduced graphene oxide (rGO), SnO2‐rGO, and ternary ZnO‐SnO2‐rGO Li‐ion anodes were produced by vacuum filtrating the mixture of metal oxides synthesized by sol‐gel method and graphene oxide produced by Hummers method. These paper anodes were designed by being decorated with metal oxides between rGO layers. To compare nanocomposite anode structures, field emission gun‐scanning electron microscopy, energy dispersive X‐ray spectrometer, X‐ray diffraction, and electrochemical analyses were applied. The results suggested that ternary ZnO‐SnO2‐rGO paper anode exhibited larger discharge capacity and capacity retention than the binary anodes even after 100 cycles. This finding is attributed to buffering effect of rGO on volume expansion of the anode structure designed by sandwich‐type production and the synergic effect of ZnO‐SnO2 oxides.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Graphene-based architectures of tin and zinc oxide nanocomposites for free-standing binder-free Li-ion anodes

2018

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“…Besides these specifically introduced OSMs, some graphene membranes have been reported to serve as efficient oxygen selective membranes for ambient air Li-air batteries, due to their hydrophobic nature as well as their micropores for rapid oxygen diffusion. [117][118][119] Graphene, as is well known, has already been intensively studied as a promising cathode material for Li-air batteries, due to its high conductivity, large surface area and excellent catalytic ability towards the ORR and OER. [120][121][122] Ozcan et al reported a flexible graphene paper, and it showed electrochemical stability as a cathode in a lithium air battery when cycled in ambient air.…”

Section: Oxygen Selective Membranementioning

confidence: 99%

“…[120][121][122] Ozcan et al reported a flexible graphene paper, and it showed electrochemical stability as a cathode in a lithium air battery when cycled in ambient air. [119] More interestingly, a graphene based moisture resistive membrane was fabricated as cathode for ambient Li-air batteries (Figure 7a). [117] Surprisingly, such three-dimensional (3D) highly tortuous membranes showed remarkable oxygen/moisture selectivity to ensure efficient oxygen diffusion while retarding the ingress of moisture.…”

Section: Oxygen Selective Membranementioning

confidence: 99%

“…This performance evenly matched that of another reported Li-O2 battery based on 3D hierarchical porous graphene cathode that was operated under pure O2. [118,119] Other materials with hydrophobic properties as well have been used as water barriers in ambient Li-air batteries. Highly hydrophobic materials favor oxygen transportation but block water penetration.…”

Section: Oxygen Selective Membranementioning

confidence: 99%

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Critical Advances in Ambient Air Operation of Nonaqueous Rechargeable Li–Air Batteries

Liu

Guo

et al. 2019

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Over the past few years, great attention has been given to nonaqueous lithium-air batteries owing to their ultrahigh theoretical energy density when compared with other energy storage systems. Most of the research interest, however, is dedicated to batteries operating in pure or dry oxygen atmospheres, while Li-air batteries that operate in ambient air still face big challenges. The biggest challenges are H2O and CO2 that exist in ambient air, which can not only form byproducts with discharge products (Li2O2), but also react with the electrolyte and the Li anode. To this end, recent progress in understanding the chemical and electrochemical reactions of Li-air batteries in ambient air is critical for the development and application of true Li-air batteries. Oxygen-selective membranes, multifunctional catalysts, and electrolyte alternatives for ambient air operational Li-air batteries are presented and discussed comprehensively. In addition, sepa-rator modification and Li anode protection are covered. Furthermore, the challenges and directions for the future development of Li-air batteries are presented

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Review and Recent Advances of Oxygen Transfer in Li‐air Batteries

Hou

et al. 2021

ChemElectroChem

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The development of high performance and low weight energy storage devices has been recently geared towards new energy batteries for electric and hybrid electric vehicles. Li‐air batteries are considered as an emerging energy source for electric cars because of their attractive theoretical specific energy of 11,400 Wh kg−1. Oxygen, as the positive electrode reaction substance of Li‐air battery, predominantly affects the dynamic performance of the battery and its diffusion is an important factor limiting the discharge process. Based on the resistance of oxygen transmission, the characteristics and influence of the Li‐air batteries are reviewed in this paper. The research on oxygen selective membrane, oxygen dissolution and transfer in positive electrode and electrolyte, structure of positive electrode and oxygenated additive in electrolyte are discussed to narrow down the internal mechanism factors that influence the Li‐air battery performance and service life. By discussing pathways to reduce the oxygen transmission resistance and hence improve the performance and life of the battery, we provide future perspectives on the application of Li‐air battery in electric vehicular power systems.

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Synthesis of flexible pure graphene papers and utilization as free standing cathodes for lithium-air batteries

Cited by 22 publications

References 30 publications

Graphene-based architectures of tin and zinc oxide nanocomposites for free-standing binder-free Li-ion anodes

Graphene-based architectures of tin and zinc oxide nanocomposites for free-standing binder-free Li-ion anodes

Critical Advances in Ambient Air Operation of Nonaqueous Rechargeable Li–Air Batteries

Review and Recent Advances of Oxygen Transfer in Li‐air Batteries

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