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Tytuł:
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Three-dimensional flower-like nickel doped cobalt phosphate hydrate microarchitectures for asymmetric supercapacitors.
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Autorzy:
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Vamsi Krishna BN; Department of Electronics and Information Convergence Engineering, Institute for Wearable Convergence Electronics, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea.
Khaja Hussain S; Department of Electronics and Information Convergence Engineering, Institute for Wearable Convergence Electronics, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea; Department of Chemical Engineering, College of Engineering, Kyung Hee University, 1732, Deogyeong-daero, Gihung-gu, Yongin-si, Gyeonggi-do 17104, Republic of Korea.
Yu JS; Department of Electronics and Information Convergence Engineering, Institute for Wearable Convergence Electronics, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea. Electronic address: .
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Źródło:
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Journal of colloid and interface science [J Colloid Interface Sci] 2021 Jun 15; Vol. 592, pp. 145-155. Date of Electronic Publication: 2021 Feb 16.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Publication: Orlando, FL : Academic Press
Original Publication: New York.
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Contributed Indexing:
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Keywords: 3D flower-like microarchitectures; Cobalt phosphate hydrates; Energy density; Power density; Silicone oil bath method
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Entry Date(s):
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Date Created: 20210301 Latest Revision: 20210330
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Update Code:
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20240105
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DOI:
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10.1016/j.jcis.2021.02.040
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PMID:
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33647563
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Development of asymmetric supercapacitors (ASCs) using hierarchical three-dimensional (3D) morphologies is becoming crucial in energy storage applications due to the greater power density rather than batteries. Herein, 3D flower-like Co 3 (PO 4 ) 2 ·8H 2 O (CPH) and nickel doped CPH (Ni-CPH) microarchitectures were synthesized by a silicone oil bath method at low temperatures without calcination. The synthesized microarchitectures-based electrodes (bare CPH and Ni-CPH) revealed battery-like properties during the electrochemical study. Importantly, the Ni-CPH electrode showed improved electrochemical performance compared to the bare CPH electrode material. The specific capacity values of the CPH and Ni-CPH electrode materials were calculated to be 74 and 108 mAh g -1 at 0.5 A g -1 , respectively. Furthermore, for the Ni-CPH electrode, 78% of capacity retention was obtained after 9000 cycles at 5 A g -1 . Additionally, an ASC was developed while employing the optimized Ni-CPH electrode (positive-type) and activated carbon (negative-type) and it showed superior electrochemical results. The ASC device exhibited excellent capacity retention (94%) after 9000 cycles at 2 A g -1 . Also, this device delivered a high energy density of 23.4 Wh kg -1 and a power density of 2103 W kg -1 . Finally, several portable electronic devices were successfully tested using the obtained good energy and power density results from the ASC device for energy storage applications.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2021 Elsevier Inc. All rights reserved.)