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Vertically-aligned graphene nanowalls grown via plasma-enhanced chemical vapor deposition as a binder-free cathode in Li-O_2 batteries

Han, Chih-Pin and Veeramani, Vediyappan and Hsu, Chen-Chih and Jena, Anirudha and Chang, Ho and Yeh, Nai-Chang and Hu, Shu-Fen and Liu, Ru-Shi (2018) Vertically-aligned graphene nanowalls grown via plasma-enhanced chemical vapor deposition as a binder-free cathode in Li-O_2 batteries. Nanotechnology, 29 (50). Art. No. 505401. ISSN 0957-4484. http://resolver.caltech.edu/CaltechAUTHORS:20181009-133528785

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Abstract

In the present report, vertically-aligned graphene nanowalls are grown on Ni foam (VA-G/NF) using plasma-enhanced chemical vapor deposition method at room temperature. Optimization of the growth conditions provides graphene sheets with controlled defect sites. The unique architecture of the vertically-aligned graphene sheets allows sufficient space for the ionic movement within the sheets and hence enhancing the catalytic activity. Further modification with ruthenium nanoparticles (Ru NPs) drop-casted on VA-G/NF improves the charge overpotential for lithium–oxygen (Li–O_2) battery cycles. Such reduction we believe is due to the easier passage of ions between the perpendicularly standing graphene sheets thereby providing ionic channels.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1088/1361-6528/aae362DOIArticle
ORCID:
AuthorORCID
Yeh, Nai-Chang0000-0002-1826-419X
Hu, Shu-Fen0000-0001-9561-8206
Liu, Ru-Shi0000-0002-1291-9052
Alternate Title:Vertically-aligned graphene nanowalls grown via plasma-enhanced chemical vapor deposition as a binder-free cathode in Li-O2 batteries
Additional Information:© 2018 IOP Publishing Ltd. As the Version of Record of this article is going to be/has been published on a subscription basis, this Accepted Manuscript will be available for reuse under a CC BY-NC-ND 3.0 licence after a 12 month embargo period. Received 28 June 2018; Accepted 21 September 2018; Accepted Manuscript online 21 September 2018; Published 11 October 2018. We thank the financial support from the Ministry of Science and Technology (Contract Nos. MOST 106-2112-M-003-007-MY3 and MOST 107-2113-M-002-008-MY3).
Funders:
Funding AgencyGrant Number
Ministry of Science and Technology (Taipei)106-2112-M-003-007-MY3
Ministry of Science and Technology (Taipei)107-2113-M-002-008-MY3
Subject Keywords:Graphene nanowall, Ru Nanoparticles, Li-O2 battery, Electrocatalyst
Record Number:CaltechAUTHORS:20181009-133528785
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20181009-133528785
Official Citation:Chih-Pin Han et al 2018 Nanotechnology 29 505401
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:90200
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:10 Oct 2018 17:50
Last Modified:12 Oct 2018 21:23

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