Reduced graphene oxide/VSB-5 composite micro/nanorod electrode for high energy density supercapattery

Raihana, M.K.; Padmanathan, N.; Eswaramoorthi, V.; McNulty, David; Sahadevan, Jhelai; Muthu, S. Esakki

doi:10.1016/j.electacta.2021.138903

Cited by 10 publications

(7 citation statements)

References 66 publications

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“…Available reports on Ni and Co phosphate-based composite materials are summarized in Table 5. 79,133–168…”

Section: Nickel/cobalt-based Phosphate Materials For Hybrid Supercapa...mentioning

confidence: 99%

“…Many composite materials have been investigated for SC applications. Raihana et al 163 prepared composite materials by combining nano/micro rods of VSB-5 and rGO hydrothermally and used these as cathodes with an AC anode to fabricate a HSC device. The as-fabricated HSC device delivered a maximum specific capacity of 86.8 mAh g −1 , an energy density of 80.5 Wh kg −1 at a power density of 2.2 kW kg −1 with a capacitive retention of 88% after 5000 cycles.…”

Section: Nickel/cobalt-based Phosphate Materials For Hybrid Supercapa...mentioning

confidence: 99%

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Transition nickel/cobalt phosphates: an advanced cathode for hybrid supercapacitors

Marje,

Tyagaraj,

Hwang

et al. 2023

J. Mater. Chem. A

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“…Available reports on Ni and Co phosphate-based composite materials are summarized in Table 5. 79,133–168…”

Section: Nickel/cobalt-based Phosphate Materials For Hybrid Supercapa...mentioning

confidence: 99%

Section: Nickel/cobalt-based Phosphate Materials For Hybrid Supercapa...mentioning

confidence: 99%

Transition nickel/cobalt phosphates: an advanced cathode for hybrid supercapacitors

Marje,

Tyagaraj,

Hwang

et al. 2023

J. Mater. Chem. A

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show abstract

“…The high-resolution TEM (HRTEM) image in Figure 1e presents the obvious lattice fringes of VSB/NiPO with the average spacing of 1.59 nm, which is indexed to the (100) plane of VSB-5, further corroborating the successful synthesis of VSB-5. [34,35] These unique and large lattice fringes can be defined as nanochannels with great aspect ratios (depth/diameter), which can provide more flexibility in mass transport during energy conversion. [36] Except for the nanochannels, the small particles on the surface of VSB/NiPO are also measured (Figure 1f).…”

Section: Structure Characterization Of Electrocatalysts Based On Vsb-5mentioning

confidence: 99%

Rational Regulation of Crystalline/Amorphous Microprisms‐Nanochannels Based on Molecular Sieve (VSB‐5) for Electrochemical Overall Water Splitting

Zhao

Zhang

Guo

et al. 2022

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Rational regulation of the composition and structure of electrocatalysts is crucial to the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Herein, a new electrocatalyst of nickel phosphate microprism (VSB/NiPO) is developed via a simple solvothermal reaction. The microprism is mainly composed of Versailles‐Santa Barbara‐5 (VSB‐5, molecular sieve) with unique nanochannels, which contribute to accelerating mass transfer and exposing more active sites, thus displaying excellent HER activity. Subsequently, the crystallinity and electronic structure of the framework are modulated by incorporating Fe with the combination of calcination and impregnation. The nanochannels are converted to the amorphous arrangement, and the Ni centers are regulated to the higher valence. The resultant Fe‐VSB/NiPO‐500 exhibits a low OER overpotential of 227 mV at 50 mA cm−2. Interestingly, an integrated electrolyzer assembled by VSB/NiPO(−) and Fe‐VSB/NiPO‐500(+) performs well for overall water splitting, which requires only 1.487 V to achieve 10 mA cm−2, and remains stable at 100 mA cm−2 over 100 h. This finding opens a new avenue for developing VSB‐5 in the field of electrocatalysis.

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“…A composite of VSB-5 and reduced graphene oxide (rGO) (VSB-5/rGO) displayed a uniform mesomicroporous structure with a specific surface area of 247.8 m 2 g −1 that helps to maximize the electroactive area for electrochemical reactions. The composite unveiled a high specific capacity (117.3 mAh g −1 ) with high specific energy (80.5 Wh kg −1 ) [3]. As a device, the activated carbon//VSB-5/reduced graphene oxide, exhibited a maximum specific capacity of 86.8 mAh g −1 , and was able to retain 88% capacity retention, even after 5000 cycles.…”

Section: Introductionmentioning

confidence: 99%

HKUST-1 as a Positive Electrode Material for Supercapattery

Azman,

Alias,

Sulaiman

2023

Energies

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The copper-based metal-organic framework (HKUST-1) exhibits interesting properties, such as high porosity and large specific surface area, which are useful as electrode materials for supercapattery. Herein, the HKUST-1 was synthesized through a facile hydrothermal method and exhibited a typical octahedral structure with a specific surface area of 1015.02 m2 g−1, which was calculated using the Barrett–Joyner–Halenda (BJH) method. From the three-electrode analysis, the HKUST-1 demonstrated a specific capacity of 126.2 C g−1 in 1 M LiOH. The structural fingerprint of the HKUST-1 was confirmed with Fourier-transform infrared spectroscopy, Raman spectroscopy, and X-ray diffraction spectroscopy. A supercapattery device, i.e., the HKUST-1//N-doped graphene, revealed a maximum specific power of 300 W kg−1 and a specific energy of 2.61 W h kg−1 at 1 A g−1 with 57% capacitance retention during continuous charging–discharging, even after 10,000 cycles. The HKUST-1 also demonstrated a low charge transfer resistance and a low equivalent series resistance of 7.86 Ω and 0.87 Ω, respectively, verifying its good conductivity. The prominent supercapattery performance of the HKUST-1//N-doped graphene suggested that the HKUST-1 is a promising positive electrode for supercapattery.

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Reduced graphene oxide/VSB-5 composite micro/nanorod electrode for high energy density supercapattery

Cited by 10 publications

References 66 publications

Transition nickel/cobalt phosphates: an advanced cathode for hybrid supercapacitors

Transition nickel/cobalt phosphates: an advanced cathode for hybrid supercapacitors

Rational Regulation of Crystalline/Amorphous Microprisms‐Nanochannels Based on Molecular Sieve (VSB‐5) for Electrochemical Overall Water Splitting

HKUST-1 as a Positive Electrode Material for Supercapattery

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