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Title: | High-Performance Supercapacitors Using Hierarchical And Sulfur-Doped Trimetallic NiCo/NiMn Layered Double Hydroxides | Authors: | He, Weikang Li, Jingjing Zhang , Yuanyuan Yang , Juan Zeng, Ting YANG, Nianjun |
Issue Date: | 2023 | Publisher: | WILEY-V C H VERLAG GMBH | Source: | Small Methods, | Status: | Early view | Abstract: | A supercapacitor features high power density and long cycling life. However, its energy density is low. To ensemble a supercapacitor with high power- and energy-densities, the applied capacitor electrodes play the key roles. Herein, a high-performance capacitive electrode is designed and grown on a flexible carbon cloth (CC) substrate via a hydrothermal reaction and a subsequent ion exchange sulfuration process. It has a 3D heterostructure, consisting of sulfur-doped NiMn-layered double hydroxide (LDH) nanosheets (NMLS) and sulfur-doped NiCo-LDH nanowires (NCLS). The electrode with sheet-shaped NMLS and wire-shaped NCLS on their top (NMLS@NCLS/CC) increases the available surface area, providing more pseudocapacitive sites. It exhibits a gravimetric capacity of 555.2 C g-1 at a current density of 1 A g-1, the retention rate of 75.1% when the current density reaches up to 20 A g-1, as well as superior cyclic stability. The assembled asymmetric supercapacitor that is composed of a NMLS@NCLS/CC positive electrode and a sulfurized activated carbon negative electrode presents a maximum energy density of 24.2 Wh kg-1 and a maximum power density of 16000 W kg-1. In this study, a facile strategy for designing hierarchical LDH materials is demonstrated as well as their applications in advanced energy storage systems. On a flexible carbon cloth, sulfur-doped NiMn-layered double hydroxides (LDH) nanosheets (NMLS) and sulfur-doped NiCo-LDH nanosheets (NCLS) are emerged into a 3D heterostructure. Using this NMLS@NCLS/CC positive electrode and a sulfurized activated carbon negative electrode, an ensembled asymmetric supercapacitor features high-performance, including high-power- and energy-densities as well as long-term stability.image | Notes: | Zeng, T (corresponding author), Wuhan Inst Technol, Sch Chem & Environm Engn, Hubei Key Lab Novel Reactor & Green Chem Technol, Key Lab Green Chem Proc,Minist Educ, Wuhan 430073, Peoples R China.; Yang, NJ (corresponding author), Hasselt Univ, Dept Chem, B-3590 Diepenbeek, Belgium.; Yang, NJ (corresponding author), Hasselt Univ, IMO IMOMEC, B-3590 Diepenbeek, Belgium. tingzeng1201@wit.edu.cn; nianjun.yang@uhasselt.be |
Keywords: | electrode kinetics;energy density;supercapacitors;transition metal chalcogenides;trimetallic layered double hydroxides | Document URI: | http://hdl.handle.net/1942/41939 | ISSN: | 2366-9608 | e-ISSN: | 2366-9608 | DOI: | 10.1002/smtd.202301167 | ISI #: | 001108653700001 | Rights: | 2023 Wiley-VCH GmbH | Category: | A1 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
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File | Description | Size | Format | |
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Small Methods - 2023 - He - High‐Performance Supercapacitors Using Hierarchical And Sulfur‐Doped Trimetallic NiCo NiMn.pdf Restricted Access | Early view | 10.03 MB | Adobe PDF | View/Open Request a copy |
auteursversie.pdf | Peer-reviewed author version | 20.6 MB | Adobe PDF | View/Open |
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