Room Temperature Synthesis of Vertically Aligned Amorphous Ultrathin NiCo-LDH Nanosheets Bifunctional Flexible Supercapacitor Electrodes

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外文摘要：Developing a simple scalable method to fabricate electrodes with high capacity and wide voltage range is desired for the real use of electrochemical supercapacitors.Herein,we synthesized amorphous NiCo-LDH nanosheets vertically aligned on activated carbon cloth substrate,which was in situ transformed from Co-metal-organic framework materials nano-columns by a simple ion exchange process at room temperature.Due to the amorphous and vertically aligned ultrathin structure of NiCo-LDH,the NiCo-LDH/activated carbon cloth composites present high areal capacities of 3770 and 1480 mF cm-2 as cathode and anode at 2 mA cm-2,and 79.5％and 80％capacity have been preserved at 50 mA cm-2.In the meantime,they all showed excellent cycling performance with negligible change after＞10 000 cycles.By fabricating them into an asymmetric supercapacitor,the device achieves high energy densities(5.61 mWh cm-2 and 0.352 mW cm-3).This work provides an innovative strategy for simplifying the design of supercapacitors as well as providing a new understanding of improving the rate capabilities/cycling stability of NiCo-LDH materials.

外文关键词：

amorphous nanosheetsaqueous supercapacitorhigh volumetric/areal energy densityNiCo-LDHroom temperature synthesis

作者：

Kwadwo Asare Owusu、Zhaoyang Wang、Ali Saad、Felix Ofori Boakye、Muhammad Asim Mushtaq、Muhammad Tahir、Ghulam Yasin、Dongqing Liu、Zhengchun Peng、Xingke Cai

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作者单位：

Institute for Advanced Study,Shenzhen University,Shenzhen 518060,China

College of Physics and Optoelectronics,Shenzhen University,3688 Nanhai Boulevard,Nanshan District,Shenzhen 518060,China

School of Chemistry and Materials Science,Hubei Engineering University,No.272 Traffic Avenue,Xiaogan 432000,China

State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,No.122 Luoshi Road,Wuhan 430070,China

Key Laboratory of Green Printing,CAS Research Centre for Excellence in Molecular Science,Institute of Chemistry Chinese Academy of Sciences(ICCAS),Beijing 100190,China

College of Mechatronics and Control Engineering,Shenzhen University,3688 Nanhai Boulevard,Nanshan District,Shenzhen 518050,China

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基金：

Natural Science Foundation of ChinaGuangdong Basic and Applied Basic Research FoundationScience and Technology Innovation Commission of ShenzhenScience and Technology Innovation Commission of ShenzhenNTUT-SZU Joint Research ProgramNTUT-SZU Joint Research Program

项目编号：

520031632022A1515010670KQTD201708101054394182020081211200600120220052022015

出版年：

2024

DOI：

10.1002/eem2.12545

能源与环境材料(英文)

ISSN：

年,卷(期)：2024.7(2)