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Design and synthesis of ternary-component layered double hydroxides for high-performance supercapacitors: understanding the role of trivalent metal ions
Wang, Xin1; Lin, Yinyin1; Su, Yan2; Zhang, Bing1; Li, Cunjun1; Wang, Hai3; Wang, Linjiang4
2017-01-20
Source PublicationELECTROCHIMICA ACTA
ISSN0013-4686
Volume225Pages:263-271
Abstract

To understand the insightful mechanics of the effects of the trivalent metal ions on the electrochemical performance of ternary-component layered double hydroxides (LDH),the ternary LDH composed by NiCoAl-LDH, NiCoAl0.5Fe0.5-LDH and NiCoFe-LDH are designed, synthesized and characterized. Despite bivalent metal ions (Ni2+, Co2+) having been demonstrated to play a highly specialized role in surface redox chemistry, the role of the trivalent metal ions within the metal hydroxide layer has not been elucidated yet in supercapacitor applications. Here we demonstrated that Al3+ has a positive effect on the stabilization of host layers of LDH, which leads to the improvement of the electrochemical performance. It was also found that Al3+ could regulate the crystallinity, hydrophilicity and nanosheets stacking of LDH. Further, comparative studies show that NiCoAl-LDH exhibited superior specific capacitance of 1153 F g(-1) at 6 A g(-1), and excellent cycling stability (ca. 92.97% capacitance retention after 3000 cycles). We attribute such remarkable enhancement in cyclic performance to the framework stability of Al3+ in the multi-metal LDH matrix layer. These results highlight the importance of trivalent metal ions in ternary-component LDH for high-performance supercapacitors and may guide future design and synthesis of LDH. (C) 2016 Elsevier Ltd. All rights reserved.

KeywordLayered Double Hydroxides Supercapacitors Metal Hydroxide Layer Electrochemical Performance Surface Redox
DOI10.1016/j.electacta.2016.12.160
URLView the original
Indexed BySCI
Language英语
WOS Research AreaElectrochemistry
WOS SubjectElectrochemistry
WOS IDWOS:000393502500029
PublisherPERGAMON-ELSEVIER SCIENCE LTD
The Source to ArticleWOS
Fulltext Access
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Cited Times [WOS]:21   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTROMECHANICAL ENGINEERING
Affiliation1.College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China
2.Department of Electromechanical Engineering, Faculty of Science and Technology, University of Macau, Taipa, Macau
3.Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, Guilin University of Technology, Guilin 541004, China
4.Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory of Processing for Non-ferrous Metal and Featured Materials, Guangxi Zhuang Autonomous Region, China
Recommended Citation
GB/T 7714
Wang, Xin,Lin, Yinyin,Su, Yan,et al. Design and synthesis of ternary-component layered double hydroxides for high-performance supercapacitors: understanding the role of trivalent metal ions[J]. ELECTROCHIMICA ACTA,2017,225:263-271.
APA Wang, Xin.,Lin, Yinyin.,Su, Yan.,Zhang, Bing.,Li, Cunjun.,...&Wang, Linjiang.(2017).Design and synthesis of ternary-component layered double hydroxides for high-performance supercapacitors: understanding the role of trivalent metal ions.ELECTROCHIMICA ACTA,225,263-271.
MLA Wang, Xin,et al."Design and synthesis of ternary-component layered double hydroxides for high-performance supercapacitors: understanding the role of trivalent metal ions".ELECTROCHIMICA ACTA 225(2017):263-271.
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