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Javed MS, Hussain I, Batool S, Siyal SH, Najam T, Shah SSA, Imran M, Assiri MA, Hussain S. Energy storage properties of hydrothermally processed ultrathin 2D binder-free ZnCo 2O 4nanosheets. NANOTECHNOLOGY 2021; 32:385402. [PMID: 34139684 DOI: 10.1088/1361-6528/ac0c42] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 06/17/2021] [Indexed: 06/12/2023]
Abstract
High energy-density supercapacitors (SCs) with long operating life, cost-effective, and competitive cycling performance is attracted great research attention to competing in the requirements of the modern age. However, despite these benefits, SC hampers inadequate rate-capability and structural deterioration, which primarily affects its commercialization. Herein, ultra-thin two-dimensional (2D) ZnCo2O4nanosheets arein situanchored on the conductive surface of nickel foam (denoted as ZCO@NF) by hydrothermal process. The binder-free ZCO@NF is employed as an electrode for SCs and shows impressive charge storage properties. ZCO@NF electrode exhibited a high capacitance of 1250 (750) and 733 F g-1(440 C g-1) at 2.5 and 20 A g-1, respectively, demonstrating the outstanding rate-capability of 58.6% even at 8 times larger current density. Furthermore, the ZCO@NF electrode exhibits admirable capacitance retention of 96.5% after 10 000 cycles. This impressive performance of the ZCO@NF electrode is attributed to the high surface area which gives a short distance for ion/electron transfer, a high conductivity with extensive electroactive cities, and strong structural stability. The binder-free approach provides a strong relationship between the current collector and the active material, which turns into improved electrochemical operation as an electrode material for SCs.
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Affiliation(s)
- Muhammad Sufyan Javed
- Institute for Advanced Materials, Jiangsu University, Zhenjiang 212013, Jiangsu, People's Republic of China
- School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, People's Republic of China
- Siyuan Laboratory, Department of Physics, Jinan University, Guangzhou 510632, People's Republic of China
| | - Iftikhar Hussain
- Department of Mechanical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong
| | - Saima Batool
- Institute for Advanced Study; Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, People's Republic of China
| | - Sajid Hussain Siyal
- Metallurgy & Materials Engineering Department, Dawood University of Engineering and Technology, Karachi 74800, Pakistan
| | - Tayyaba Najam
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, People's Republic of China
| | - Syed Shoaib Ahmad Shah
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Soft Matter Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Muhammad Imran
- Department of Chemistry, Faculty of Science, King Khalid University, PO Box 9004, Abha 61413, Saudi Arabia
| | - Mohammad A Assiri
- Department of Chemistry, Faculty of Science, King Khalid University, PO Box 9004, Abha 61413, Saudi Arabia
| | - Shahid Hussain
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, People's Republic of China
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Potato Chip-Like 0D Interconnected ZnCo2O4 Nanoparticles for High-Performance Supercapacitors. CRYSTALS 2021. [DOI: 10.3390/cryst11050469] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Zinc cobaltite (ZnCo2O4) is an emerging electrode material for supercapacitors due to its rich redox reactions involving multiple oxidation states and different ions. In the present work, potato chip-like 0D interconnected ZnCo2O4 nanoparticles (PIZCON) were prepared using a solvothermal approach. The prepared material was characterized using various analytical methods, including X-ray powder diffraction and scanning electron microscopy. The possible formation mechanism of PIZCON was proposed. The PIZCON electrode material was systematically characterized for supercapacitor application. The areal capacitance of PIZCON was 14.52 mF cm−2 at 10 µA cm−2 of current density, and retention of initial capacitance was 95% at 250 µA cm−2 following 3000 continuous charge/discharge cycles. The attained measures of electrochemical performance indicate that PIZCON is an excellent supercapacitor electrode material.
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Gunasekaran SS, Badhulika S. N-Doped carbon as the anode and ZnCo 2O 4/N-doped carbon nanocomposite as the cathode for high-performance asymmetric supercapacitor application. NEW J CHEM 2021. [DOI: 10.1039/d1nj01526e] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Herein, we report a one-pot hydrothermal assisted synthesis of ZnCo2O4/N-doped carbon nanocomposite (ZC/NC) for high-performance asymmetric supercapacitor applications.
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Affiliation(s)
| | - Sushmee Badhulika
- Department of Electrical Engineering
- Indian Institute of Technology Hyderabad
- Hyderabad
- India
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