Electrochemical supercapacitor is an essential technology that is pivotal for the development of reliable energy storage devices. Herein, we report the fabrication of supercapacitor electrodes using nanostructured porous cobalt chalcogenide (CoTe2 and CoSe2) electrodes, anticipating an enhanced performance owing to their higher contact area with electrolyte and large pore volume enabling shorter diffusion paths for ion exchange. In this regard, we synthesized CoTe2 and CoSe2 nanostructures via an anion-exchange-reaction between pre-synthesized Co(OH)(2) hexagonal nanosheets and chalcogen (tellurium and selenium) ions under hydrothermal conditions. Structural, morphological and compositional properties of the as-synthesized materials are examined using X-ray diffraction, Raman spectroscopy, scanning electron microscopy, high resolution transmission electron microscopy and energy dispersive X-ray spectroscopy. Pseudo-capacitive properties of CoTe2 and CoSe2 nanostructures as working electrodes are studied through cyclic voltammetry and galvanostatic charge-discharge methods using an electrochemical workstation. CoSe2 electrode delivered a specific capacitance of 951 F g(-1) at a scan rate of 5 mV s(-1), which surprisingly is almost three times higher in comparison to CoTe2 electrode (360 F g(-1)). Both CoTe2 and CoSe2 electrodes exhibited good capacitance retention capability for 2500 CV cycles. The superior electrochemical performance of the nanoporous CoSe2 electrode indicate their applicability for high-performance energy storage device applications. (C) 2017 Elsevier Ltd. All rights reserved.
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Natl Inst Technol Karnataka, Dept Phys, PO Srinivasnagar, Surathkal 575025, Mangaluru, IndiaNatl Inst Technol Karnataka, Dept Phys, PO Srinivasnagar, Surathkal 575025, Mangaluru, India
Bindu, K.
Sridharan, Kishore
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Natl Inst Technol Karnataka, Dept Phys, PO Srinivasnagar, Surathkal 575025, Mangaluru, IndiaNatl Inst Technol Karnataka, Dept Phys, PO Srinivasnagar, Surathkal 575025, Mangaluru, India
Sridharan, Kishore
Ajith, K. M.
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Natl Inst Technol Karnataka, Dept Phys, PO Srinivasnagar, Surathkal 575025, Mangaluru, IndiaNatl Inst Technol Karnataka, Dept Phys, PO Srinivasnagar, Surathkal 575025, Mangaluru, India
Ajith, K. M.
Lim, H. N.
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Univ Putra Malaysia, Fac Sci, Dept Chem, Upm Serdang 43400, Selangor Darule, MalaysiaNatl Inst Technol Karnataka, Dept Phys, PO Srinivasnagar, Surathkal 575025, Mangaluru, India
Lim, H. N.
Nagaraja, H. S.
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Natl Inst Technol Karnataka, Dept Phys, PO Srinivasnagar, Surathkal 575025, Mangaluru, IndiaNatl Inst Technol Karnataka, Dept Phys, PO Srinivasnagar, Surathkal 575025, Mangaluru, India
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Natl Chem Lab CSIR NCL, Ctr Excellence Solar Energy, Pune, Maharashtra, India
Network Inst Solar Energy CSIR NISE, New Delhi, IndiaNatl Chem Lab CSIR NCL, Ctr Excellence Solar Energy, Pune, Maharashtra, India
Biswal, Mandakini
Banerjee, Abhik
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Natl Chem Lab CSIR NCL, Ctr Excellence Solar Energy, Pune, Maharashtra, India
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Banerjee, Abhik
Deo, Meenal
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Natl Chem Lab CSIR NCL, Ctr Excellence Solar Energy, Pune, Maharashtra, India
Network Inst Solar Energy CSIR NISE, New Delhi, IndiaNatl Chem Lab CSIR NCL, Ctr Excellence Solar Energy, Pune, Maharashtra, India
Deo, Meenal
Ogale, Satishchandra
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Natl Chem Lab CSIR NCL, Ctr Excellence Solar Energy, Pune, Maharashtra, India
Network Inst Solar Energy CSIR NISE, New Delhi, IndiaNatl Chem Lab CSIR NCL, Ctr Excellence Solar Energy, Pune, Maharashtra, India
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Natl Inst Technol Karnataka, Dept Phys, PO Srinivasnagar, Surathkal 575025, Mangaluru, IndiaNatl Inst Technol Karnataka, Dept Phys, PO Srinivasnagar, Surathkal 575025, Mangaluru, India
Bindu, K.
Sridharan, Kishore
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Natl Inst Technol Karnataka, Dept Phys, PO Srinivasnagar, Surathkal 575025, Mangaluru, IndiaNatl Inst Technol Karnataka, Dept Phys, PO Srinivasnagar, Surathkal 575025, Mangaluru, India
Sridharan, Kishore
Ajith, K. M.
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Natl Inst Technol Karnataka, Dept Phys, PO Srinivasnagar, Surathkal 575025, Mangaluru, IndiaNatl Inst Technol Karnataka, Dept Phys, PO Srinivasnagar, Surathkal 575025, Mangaluru, India
Ajith, K. M.
Lim, H. N.
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机构:
Univ Putra Malaysia, Fac Sci, Dept Chem, Upm Serdang 43400, Selangor Darule, MalaysiaNatl Inst Technol Karnataka, Dept Phys, PO Srinivasnagar, Surathkal 575025, Mangaluru, India
Lim, H. N.
Nagaraja, H. S.
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Natl Inst Technol Karnataka, Dept Phys, PO Srinivasnagar, Surathkal 575025, Mangaluru, IndiaNatl Inst Technol Karnataka, Dept Phys, PO Srinivasnagar, Surathkal 575025, Mangaluru, India
机构:
Natl Chem Lab CSIR NCL, Ctr Excellence Solar Energy, Pune, Maharashtra, India
Network Inst Solar Energy CSIR NISE, New Delhi, IndiaNatl Chem Lab CSIR NCL, Ctr Excellence Solar Energy, Pune, Maharashtra, India
Biswal, Mandakini
Banerjee, Abhik
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机构:
Natl Chem Lab CSIR NCL, Ctr Excellence Solar Energy, Pune, Maharashtra, India
Network Inst Solar Energy CSIR NISE, New Delhi, IndiaNatl Chem Lab CSIR NCL, Ctr Excellence Solar Energy, Pune, Maharashtra, India
Banerjee, Abhik
Deo, Meenal
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机构:
Natl Chem Lab CSIR NCL, Ctr Excellence Solar Energy, Pune, Maharashtra, India
Network Inst Solar Energy CSIR NISE, New Delhi, IndiaNatl Chem Lab CSIR NCL, Ctr Excellence Solar Energy, Pune, Maharashtra, India
Deo, Meenal
Ogale, Satishchandra
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机构:
Natl Chem Lab CSIR NCL, Ctr Excellence Solar Energy, Pune, Maharashtra, India
Network Inst Solar Energy CSIR NISE, New Delhi, IndiaNatl Chem Lab CSIR NCL, Ctr Excellence Solar Energy, Pune, Maharashtra, India