Nanocomposite of hexagonal β-Ni(OH)2/multiwalled carbon nanotubes as high performance electrode for hybrid supercapacitors

Chaitra, K.; Nagaraju, N.; Nagaraju, Kathyayini

doi:10.1016/j.matchemphys.2015.08.030

Cited by 32 publications

(6 citation statements)

References 40 publications

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“…This suggests that, the larger amount of charges can be stored in the Ni/Co-MOF. The C s of Ni-MOF, Co-MOF, and Ni/Co-MOF for different scan rates were calculated using following equation [32].…”

Section: Electrochemical Studiesmentioning

confidence: 99%

“…Nonlinear nature of discharge curves from CP confirms that the pseudocapacitive behaviour of Ni-MOF, Co-MOF and Ni/Co-MOF, consistent with CV patterns. Based on Charge-discharge curves, C s was calculated for different current densities by using following formula [32].…”

Section: Mofmentioning

confidence: 99%

“…The presence of Ni and Co metal ions in MOF achieves highest C s with moderate capacitance rention of 73% after 5000 charge discharge cycles. The columbic efficiencies of Ni-MOF, Co-MOF and Ni/Co-MOF were calculated by using following equation [32].…”

Section: Mofmentioning

confidence: 99%

“…ED and PD are two main critical parameters which evaluate the practical performance of supercapacitors. ED and PD are calculated by CP measurements using following equations [32].…”

Section: Mofmentioning

confidence: 99%

“…Nyquist plots consist of three regions i.e., intercept on the real Z′ axis at high frequency region, semicircle and straight line at low-frequency region. However, the intercept on the real axis at high frequency region is generally due to electrolyte resistance which arises due to combined resistance (solution resistance (R s )) of ionic, electronic, intrinsic, diffusive and contact resistance between electrode and current collector [32]. It was noticed that, lower Rs (1.85 Ω) was observed in Ni/Co-MOF than individual MOFs.…”

Section: Mofmentioning

confidence: 99%

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Electrochemical studies on Ni, Co & Ni/Co-MOFs for high-performance hybrid supercapacitors

Radhika¹,

Gopalakrishna²,

Chaitra³

et al. 2020

Mater. Res. Express

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Metal-organic framework (MOF) of Ni-MOF, Co-MOF, and Ni/Co-MOF were synthesized by a facile hydrothermal method using Trimesic acid as structure directing linker. The physico-chemical properties of the synthesized MOFs were characterized by P-XRD (powder X-ray diffraction), FT-IR (fourier transform infrared spectroscopy), SEM-EDS (scanning electron microscopy/energydispersive X-ray spectroscopy), HR-TEM (high-resolution transmission tlectron microscope) and BET (Brunner Emmett Teller) surface area techniques. The supercapacitance performance of these MOFs were studied by electroanalytical techniques such as cyclic voltammetry (CV), chronopotentiometry (CP) and electrochemical impedance spectroscopy (EIS). Amongst the MOFs investigated, Ni/Co-MOF exhibited highest specific capacitance (C s ) of 2041 F g −1 at a scan rate of 2 mV s −1 and 980 F g −1 at a current density of 2.5 A g −1 . Ni/Co-MOFs delivered a maximum energy density (ED) of 55.7 W h Kg −1 at a corresponding power density (PD) of 1 K W kg −1 and maximum PD of 9.8 K W kg −1 at an ED of 41.6 W h Kg −1 . An outstanding supercapacitance performance with superior columbic efficiency of 98.4% and capacitive retention of 73% after 5000 cycles marks this material as potential candidate for supercapacitors (SCs). A comparative electrochemical study of these MOFs were made in three electrode system, further electrochemical performance was corelated with their physico-chemical properties.

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Section: Electrochemical Studiesmentioning

confidence: 99%

Section: Mofmentioning

confidence: 99%

Section: Mofmentioning

confidence: 99%

“…ED and PD are two main critical parameters which evaluate the practical performance of supercapacitors. ED and PD are calculated by CP measurements using following equations [32].…”

Section: Mofmentioning

confidence: 99%

Section: Mofmentioning

confidence: 99%

See 3 more Smart Citations

Electrochemical studies on Ni, Co & Ni/Co-MOFs for high-performance hybrid supercapacitors

Radhika¹,

Gopalakrishna²,

Chaitra³

et al. 2020

Mater. Res. Express

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Direct electrodeposition of various metal nanocrystals on silicon oxide dielectric layer and insights into electrochemical behavior

Shin

Lee

et al. 2021

Bulletin Korean Chem Soc

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Electrochemistry of thermally grown silicon oxide can address many interesting features and it was further embellished by the development of defective 200 nm thermal oxide grown on highly n‐doped silicon (n+‐Si/SiO2). However, there are still space to uncover underlying conduction mechanism and applications, specifically for defective 200 nm n+‐Si/SiO2 electrode. These could be addressed by direct electrodeposition, so various kinds of metal nanocrystals, Fe, Cr, Ir, Ru, Co, Pd, Cu, Ni, and Ag, were electrodeposited on it. Their shapes were characterized by SEM and electrodeposited amounts were quantified by ICP‐MS. Furthermore, voltammetry was conducted to provide insights into the direct electrodeposition mechanism of either H atom mediated electrochemistry or electron transfer through percolation paths. This work can further provide intuition toward the development of metal‐supported catalysts.

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Biomass‐Derived Carbon: A Value‐Added Journey Towards Constructing High‐Energy Supercapacitors in an Asymmetric Fashion

et al. 2019

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Nanocomposite of hexagonal β-Ni(OH)2/multiwalled carbon nanotubes as high performance electrode for hybrid supercapacitors

Cited by 32 publications

References 40 publications

Electrochemical studies on Ni, Co & Ni/Co-MOFs for high-performance hybrid supercapacitors

Electrochemical studies on Ni, Co & Ni/Co-MOFs for high-performance hybrid supercapacitors

Direct electrodeposition of various metal nanocrystals on silicon oxide dielectric layer and insights into electrochemical behavior

Biomass‐Derived Carbon: A Value‐Added Journey Towards Constructing High‐Energy Supercapacitors in an Asymmetric Fashion

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