A Novel High-Performance Anode Material with an Enlarged Potential Window for a Hybrid Energy Storage System

Cobalt-iron (CoFe) layered double hydroxides (LDHs) have received much interest for supercapacitors (SCs) because of their ion-insertable layer structure. However, there is still a need for more effort to increase their potential window and overall electrochemical energy storage capability as SC electrodes. In this work, we present a straightforward approach to synthesizing CoFe-LDHs on zinc oxide seeded carbon cloth (ZnO@CC) via a one-step hydrothermal reaction; the obtained electrode is denoted as CoFe-LDH@ZnO@CC. The electrochemical energy storage properties of CoFe-LDH@ZnO@CC are tested as an anode material using a three-electrode setup for SC applications in 1 M Na2SO4 electrolyte. It can operate in a wider potential window reaching up to 1.6 V, exceeding most previously reported anode materials. The CoFe-LDH@ZnO@CC displayed capacitive charge storage accounting for 76% of the total charge stored at 20 mV/s. The CoFe-LDH@ZnO@CC anode delivered a maximum capacitance of 299.8 F/g at 2 A/g, outstanding cycle stability, and retained 97.7% of the initial capacitance value for 5000 cycles at 16 A/g. This study introduces a new strategy for structurally designing electroactive materials for energy storage devices, which might be useful as an anode for SCs. © 2022 by the authors.

Авторы
Mateen A. , Zubair M. , Saleem M. , Golubenkova A. , Voskressensky L. , Alothman A.A. , Ouladsmane M. , Ahmad A. , Javed M.S.
Журнал
Издательство
MDPI AG
Номер выпуска
24
Язык
Английский
Статус
Опубликовано
Номер
9577
Том
15
Год
2022
Организации
  • 1 Department of Physics and Beijing Key Laboratory of Energy Conversion and Storage Materials, Beijing Normal University, Beijing, 100084, China
  • 2 Institute of Energy and Climate Research, Materials Synthesis and Processing (IEK-1), Forschungszentrum Jülich GmbH, Jülich, 52425, Germany
  • 3 Department of Physics, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan
  • 4 Department of Organic Chemistry, Faculty of Science, Peoples Friendship University of Russia (RUDN University), Miklukho Maklaya Str, Moscow, 117198, Russian Federation
  • 5 Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
  • 6 Departamento de Quimica Organica, Universidad de Cordoba, Edificio Marie Curie (C-3), Ctra Nnal IV-A, Km 396, Cordoba, E14014, Spain
  • 7 School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China
Ключевые слова
anode; cobalt; iron; layered double hydroxides; supercapacitors
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