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  Vertically Aligned Two-Dimensional Graphene-Metal Hydroxide Hybrid Arrays for Li–O2 Batteries

Zhu, J., Metzger, M., Antonietti, M., & Fellinger, T.-P. (2016). Vertically Aligned Two-Dimensional Graphene-Metal Hydroxide Hybrid Arrays for Li–O2 Batteries. ACS Applied Materials and Interfaces, 8(39), 26041-26050. doi:10.1021/acsami.6b08222.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-5299-E Version Permalink: http://hdl.handle.net/21.11116/0000-0001-2EFA-3
Genre: Journal Article
Alternative Title : ACS Applied Materials & Interfaces

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 Creators:
Zhu, Jixin1, Author              
Metzger, Michael, Author
Antonietti, Markus2, Author              
Fellinger, Tim-Patrick1, Author              
Affiliations:
1Tim Fellinger, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863322              
2Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863321              

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 Abstract: Lithium oxygen batteries (LOBs) are a very promising upcoming technology which however still suffers from low lifespan and dramatic capacities fading. Solid discharge products increase the contact resistance and block the electrochemically active electrodes. The resulting high oxidative potentials and formation of Li2CO3 due to electrolyte and carbon electrode decomposition at the positive electrode lead to irreversible deactivation of oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) sites. Here we demonstrate a facile strategy for the scalable production of a new electrode structure constituted of vertically aligned carbon nanosheets and metal hydroxide (M(OH)x@CNS) hybrid arrays, integrating both favorable ORR and OER active materials to construct a bifunctional catalysts for LOBs. Excellent lithium-oxygen battery properties with high specific capacity of 5403 mAh g-1 and 12123 mAh g-1 referenced to the carbon and M(OH)x weight, respectively, long cyclability and low charge potentials are achieved in the resulting M(OH)x@CNS cathode architecture. The properties are explained by improved O2/ion transport properties and spatially limited precipitation of Li2O2 nanoparticles inside interstitial cavities resulting in high reversibility. The strategy of creating ORR and OER bifunctional catalysts in a single conductive hybrid component may pave the way to new cathode architectures for metal air batteries.

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 Dates: 2016-09-072016-10-05
 Publication Status: Published in print
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 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acsami.6b08222
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Title: ACS Applied Materials and Interfaces
  Abbreviation : ACS Appl. Mater. Interfaces
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 8 (39) Sequence Number: - Start / End Page: 26041 - 26050 Identifier: ISSN: 1944-8244