Crystalline NiCo2O4 and amorphous NiCo2S4 heterostructured electrode for high-performance asymmetric supercapacitors

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 96, P. 112614 - 112614

Published: June 24, 2024

Language: Английский

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Flower-like CoMoO₄/Carbon Nanocomposites for Supercapacitors

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 5, 2025

The synthesis and preparation of supercapacitor cathode materials is one the important ways to achieve increase energy density supercapacitors. CoMoO4 a commonly used material, but its own conductivity poor, however, carbon can make up for this shortcoming poor conductivity. In paper, soluble starch with high solubility uniform dispersion was as source, CoMoO4/carbon flower-like nanocomposites (CCMO) containing surface flocculants were successfully synthesized by two-step hydrothermal reaction applied supercapacitors, which showed excellent electrochemical properties. order determine properties prepared CCMO, it tested in three-electrode system. test results demonstrate that CCMO-3 electrode under condition quality ratio 1:1 demonstrated best performance, specific capacitance 415F g–1. After 15000 cycles at current 10 A g–1, remained 87.5% initial reversible capacity. device (CCMO//AC ASC) activated carbon, both positive negative electrodes, has an 12.44 Wh kg–1 power 799.71 W kg–1. At 5 maintains 75% capacity after 10000 cycles. performance shows application potential storage devices.

Language: Английский

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Nanostructure-Integrated Electrode Based on Ni/NiO Coaxial Bilayer Nanotube Array with Large Specific Capacitance for Miniaturized Applications

Materials, Journal Year: 2025, Volume and Issue: 18(6), P. 1286 - 1286

Published: March 14, 2025

The fast development of portable electronics demands electrodes for supercapacitors that are compatible with miniaturized device applications. In this study, an orderly aligned coaxial bilayer nanotube array made transition metal/transition metal oxides was adopted as a nanostructure-integrated electrode applications micro-supercapacitors. Using Ni and NiO our model materials, the corresponding Ni/NiO-CBNTA were fabricated using templated growth post-thermal oxidation. shells served parts 3D nano-architectured collector, providing large specific surface area, pseudocapacitive layers directly attached electrically connected to collector without any additives. vertical Ni/NiO-CBNTAs successfully avoided underutilization capacitive nanomaterials allowed electrolyte be fully accessed, which manifested full charge storage capabilities under miniaturizing. It demonstrated can serve improved capacitance 1125 F/g ≅ 3 A/g, is comparable obtained in massive load prepared by conventional slurry-coating technique.

Language: Английский

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Emphasis on the transition metal sulfides and their polymer composites as potential electrodes for supercapacitor applications

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 103, P. 114312 - 114312

Published: Nov. 12, 2024

Language: Английский

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A flexible solid-state asymmetric supercapacitor device comprising cobalt hydroxide and biomass-derived porous carbon

RSC Advances, Journal Year: 2024, Volume and Issue: 14(37), P. 27465 - 27474

Published: Jan. 1, 2024

Development in the field of alternative and renewable energy sources is becoming necessary considering current demands growing technologies. The main challenge associated with produced to store it for future use, such that can be used when needed. Supercapacitors are among electrochemical storage systems provides higher power density, faster charging-discharging, high specific capacitance (

Language: Английский

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Longevous Protic Hybrid Supercapacitors Using Bimetallic Prussian Blue Analogue/rGO‐Based Nanocomposite Against MXene Anode

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 25, 2024

Abstract MXenes exhibit a unique combination of properties—2D structure, high conductivity, exceptional capacity, and chemical resistance—making them promising candidates for hybrid supercapacitors (HSCs). However, the development MXene‐based HSCs is often hindered by limited availability cathode materials that deliver comparable electrochemical performance, especially in protic electrolytes. In this study, challenge addressed introducing durable HSC utilizing bimetallic Prussian Blue Analogue (PBA) decorated on reduced graphene oxide (rGO) as nanocomposite paired with single‐layered Ti 3 C 2 T x MXene (SL‐MXene) anode. The PBA, specifically nickel hexacyanocobaltate (NiHCC), utilized virtue its open stable structure facilitates efficient charge storage, leading to enhanced stability energy storage capabilities. resulting NiHCC/rGO//SL‐MXene cell demonstrates impressive achieving maximum specific 38.03 Wh kg −1 power density 20 666.67 W . Remarkably, also exhibits excellent cycling without any loss even after 15 000 cycles while retaining ≈100% coulombic efficiency. This work underscores potential PBA conductive rGO backbone overcoming limitations current HSCs, highlighting significance work.

Language: Английский

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Unveiling light-modulated capacitance of sea urchin like δ-MnO2: A smart flexible photocapacitive device

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 101, P. 113904 - 113904

Published: Oct. 8, 2024

Language: Английский

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Synergistic Coupling of CuNi Alloy with CoFe LDH Heterostructure on Nickel Foam toward High-Efficiency Overall Water Splitting

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(48), P. 33680 - 33688

Published: Jan. 1, 2024

The synergy of the CuNi alloy and CoFe LDH can adjust electron distribution at interface optimize free energy adsorbed intermediates, thereby reducing barrier rate-determining step.

Language: Английский

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