Highly enhanced electrochemical performance of ultrafine CuO nanoparticles confined in ordered mesoporous carbons as anode materials for sodium-ion batteries

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/101691

Title:	Highly enhanced electrochemical performance of ultrafine CuO nanoparticles confined in ordered mesoporous carbons as anode materials for sodium-ion batteries
Authors:	史艾佳;Chandra Rath, Purna;Patra, Jagabandhu;Saikia, Diganta;Mishra, Mrinalini;Chang, Jeng-Kuei;Kao, Hsien-Ming
Contributors:	理學院化學學系
Keywords:	Anodes;batteries;Carbon;cupric oxide;Current density;Electrochemical analysis;electrochemistry;Electrodes;Nanocomposites;Nanoparticles;porous media;Rechargeable batteries;scanning electron microscopy;transmission electron microscopy;X-ray diffraction
Date:	2016-01-01
Issue Date:	2026-04-21 14:40:55 (UTC+8)
Publisher:	Royal Society of Chemistry;Royal Society of Chemistry (RSC)
Abstract:	摘要： Ultrafine CuO nanoparticles are successfully encapsulated into two ordered mesoporous carbons (OMCs) with different pore architectures, namely CMK-8 with a 3D cubic mesostructure and CMK-3 with a 2D hexagonal mesostructure, and used as anodes in sodium-ion batteries. The electrochemical test results demonstrate that the CuOCMK-8 nanocomposite with ultra-small CuO nanoparticles (around 4 nm in diameter) and a high content of CuO (78%) exhibits superior electrochemical performance as compared to that of the CuOCMK-3 nanocomposite and the pristine CuO electrodes. The CuOCMK-8 anode delivers an initial discharge capacity of 1405 mA h g −1 with a reversible capacity of 768 mA h g −1 at a current density of 20 mA g −1 . At a current density of 100 mA g −1 , it provides a reversible capacity of 477 mA h g −1 after 200 cycles with coulombic efficiency over 99%. The remarkable enhancement of the electrochemical performance of the CuOCMK-8 nanocomposite can be attributed to the electrically conductive network of CMK-8 in the CuOCMK-8 nanocomposite wherein the ultra-small CuO nanoparticles supported on CMK-8 act as a synergistic elastic buffer. Furthermore, cyclic voltammetry, ex situ XRD, SEM and TEM measurements provide deeper insights to the reversible conversion reaction in the CuOCMK-8 nanocomposite system during the sodiation/desodiation process. The CuOCMK-8 anode exhibits an initial discharge capacity of 1405 mA h g −1 and a reversible capacity of 768 mA h g −1 in sodium-ion batteries. 出版者： Royal Society of Chemistry (RSC) 出版日期： 2016-01-01 出處： Journal of Materials Chemistry A, 2016-01, Vol.4 (37), p.14222-14233 資源來源： Royal Society of Chemistry 識別號： ISSN: 2050-7488 識別號： ISSN: 2050-7496 識別號： EISSN: 2050-7496 識別號： DOI: 10.1039/c6ta05238j
Appears in Collections:	[Department of Chemistry] journal & Dissertation

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