안희준
2019-12-02T01:34:17Z
2019-12-02T01:34:17Z
2017-11
JOURNAL OF ALLOYS AND COMPOUNDS, v. 724, page. 684-694
0925-8388
1873-4669
https://www.sciencedirect.com/science/article/abs/pii/S0925838817324337?via%3Dihub
https://repository.hanyang.ac.kr/handle/20.500.11754/116174
Cobalt-based nanomaterials have received considerable attention in electric energy-storage devices due to their outstanding electrochemical characteristics. However, multiple time- and energy-consuming steps and complex reduction processes for producing cobalt and cobalt oxide nanostructures are disrupting their substantive commercialization. Here, we propose a facile, ultra-fast, and versatile method for the fabrication of cobalt and cobalt oxide nanostructures using an intense pulsed white light (IPWL) photothermal reduction technique. The mechanism of the IPWL photothermal reduction of cobalt and cobalt oxide is firstly studied by measuring the in-situ temperature of the Co(NO3)(2)-coated carbon fiber paper (CFP) substrate during IPWL irradiation and analyzing the crystal structures of the IPWL-irradiated samples. Cobalt nanoflakes and cobalt oxide nanoparticles are synthesized on the surface of the CFP substrate by irradiating IPWL for 10 ms at ambient temperature and pressure with various energy densities from 10 to 30 J cm(-2). The Co3O4 nanoparticle/CFP and Co nanoflake/CFP samples are further utilized as an electrode, and each electrode exhibits high specific capacity of 29 and 73 mA h g(-1), respectively, at a current density of 1 A g(-1). Since this novel photothermal reduction technique is applicable to other transition metals and metal oxides, it is a promising method for not only energy storage systems, but also for energy generation applications, filters, sensors, and catalysis systems. (C) 2017 Elsevier B.V. All rights reserved.
This research was supported by a grant from the Technology Development Program for Strategic Core Materials funded by the Ministry of Trade, Industry and Energy (10047758) and grants from Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2012R1A6A1029029, 2014M3A7B4052201 and 2015R1A2A2A01008398), Republic of Korea.
en_US
ELSEVIER SCIENCE SA
Intense pulsed white light
Photothermal reduction
Nanostructure
Energy storage
Cobalt oxide
Simple, ultra-rapid, versatile method to synthesize cobalt/cobalt oxide nanostructures on carbon fiber paper via intense pulsed white light (IPWL) photothermal reduction for energy storage applications
Article
724
10.1016/j.jallcom.2017.07.069
684-694
JOURNAL OF ALLOYS AND COMPOUNDS
Lee, Sanghyun
Park, Sung-Hyeon
Jang, Kihun
Yu, Seongil
Song, Chiho
Kim, Hak-Sung
Ahn, Heejoon
2017003338
S
COLLEGE OF ENGINEERING[S]
DEPARTMENT OF ORGANIC AND NANO ENGINEERING
ahn
K-4603-2015
http://orcid.org/0000-0002-3322-6423