Bi-interface induced multi-active MCo2O4@MCo2S4@PPy (M=Ni, Zn) sandwich structure for energy storage and electrocatalysis

Zhao, Depeng; Liu, Henqi; Wu, Xiang

doi:10.1016/j.nanoen.2018.12.066

Cited by 291 publications

(87 citation statements)

References 42 publications

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“…However, the relatively low energy densities of supercapacitors due to their carbon‐based electrodes, of which the energy storage depends on electrical double‐layer capacitance (EDLC), hinder the wider applications. In order to solve the issue, pseudocapacitive or battery‐type electrode materials exhibiting larger energy densities are widely studied . Among them, nickel/cobalt hydroxides have been paid plenty of attention due to the large capacity, as well as their easy synthesis and low cost, making them applicable favorable …”

Section: Introductionmentioning

confidence: 99%

“HOT” Alkaline Hydrolysis of Amorphous MOF Microspheres to Produce Ultrastable Bimetal Hydroxide Electrode with Boosted Cycling Stability

Zhang

Mei

et al. 2019

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Nickel/cobalt hydroxide is a promising battery‐type electrode material for supercapacitors. However, its low cycle stability hinders further applications. Herein, Ni0.7Co0.3(OH)2 core–shell microspheres exhibiting extreme‐prolonged cycling life are successfully synthesized, employing Ni‐Co‐metal–organic framework (MOF) as the precursor/template and a specific hydrolysis strategy. The Ni‐Co‐MOF and KOH aqueous solution are separated and heated to 120 °C before mixing, rather than mixing before heating. Through this hydrolysis strategy, no MOF residual exists in the product, contributing to close stacking of the hydroxide nanoflakes to generate Ni0.7Co0.3(OH)2 microspheres with a robust core–shell structure. The electrode material exhibits high specific capacity (945 C g−1 at 0.5 A g−1) and unprecedented cycling performance (100% after 10 000 cycles). The fabricated asymmetric supercapacitor delivers an energy density of 40.14 Wh kg−1 at a power density of 400.56 W kg−1 and excellent cycling stability (100% after 20 000 cycles). As far as is known, it is the best cycling performance for pure Ni/Co(OH)2.

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Section: Introductionmentioning

confidence: 99%

“HOT” Alkaline Hydrolysis of Amorphous MOF Microspheres to Produce Ultrastable Bimetal Hydroxide Electrode with Boosted Cycling Stability

Zhang

Mei

et al. 2019

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“…However, the complicated synthesis route may limit the practical application. Moreover, polymer polypyrrole (PPy) also has more superior electronic conductivity (10–100 S cm −1 ) than TMOs and transition metal sulfides (TMSs) . Recent studies suggest that the combination of TMOs/TMSs with PPy could significantly enhance the electrochemical property by ameliorating the electron conduction and ion diffusion question .…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Sheet Stacking Structure NiCo₂S₄@PPy with Enhanced Rate Capability and Cycling Performance for Aqueous Supercapacitors

Qiu

et al. 2020

Energy Tech

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A NiCo2S4@PPy series with sheet stacking structure and suitable pore size distribution is successfully synthesized through a one‐step vulcanization process and polymerization process. Interestingly, the abundant sites and large electroactive surface area of NiCo2S4@PPy stacking structure are formed via the “etching effect” of S2− ions and ultrasonic oscillation effect, which render the morphology of NiCo2S4@PPy with a lamellar feature. In contrast, polypyrrole (PPy) with good conductivity provides favorable electron transport pathways for electrolyte ions. The as‐prepared sheet stacking structure NiCo2S4@PPy (NCSP‐3) electrode delivers good electrochemical properties with the highest specific capacitance of 1606.6 F g−1 at 1 A g−1 and excellent rate performance of 77.4% at high discharge rate of 10 A g−1. Furthermore, the NCSP‐3 electrode exhibits remarkable cycling stability, where the ultimate specific capacitance has no attenuation (retained at around 100%) compared with its incipient value after 20 000 cycles even at 20 A g−1. These promising results can be put down to the unique structure and synergetic effect of NiCo2S4 and PPy, which ensure good conductivity, more redox reactions, as well as large specific surface area. This work has guiding significance for the general and low‐cost route design of high‐performance electrode materials for supercapacitor applications.

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“…[33][34][35][36][37] Generally, electrode materials are considered to play signicant roles in determining the performances of the energy conversion and storage systems. [38][39][40][41] In recent years, Ni 3 S 2 , a typical nickel sulde with a high theoretical capacity of 2412 F g À1 , has been reported to demonstrate outstanding electrochemical performances for supercapacitors and H 2 evolution due to its low cost, good conductivity, higher electrochemical activities and environmental friendliness. [42][43][44] Li et al synthesized Ni 3 S 2 nanoparticles by simple mechanical alloying as the electrode for a supercapacitor.…”

Section: Introductionmentioning

confidence: 99%

Three dimensional Ni₃S₂ nanorod arrays as multifunctional electrodes for electrochemical energy storage and conversion applications

Cui

Fan

et al. 2020

Nanoscale Adv.

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Bi-interface induced multi-active MCo2O4@MCo2S4@PPy (M=Ni, Zn) sandwich structure for energy storage and electrocatalysis

Cited by 291 publications

References 42 publications

“HOT” Alkaline Hydrolysis of Amorphous MOF Microspheres to Produce Ultrastable Bimetal Hydroxide Electrode with Boosted Cycling Stability

“HOT” Alkaline Hydrolysis of Amorphous MOF Microspheres to Produce Ultrastable Bimetal Hydroxide Electrode with Boosted Cycling Stability

Facile Synthesis of Sheet Stacking Structure NiCo₂S₄@PPy with Enhanced Rate Capability and Cycling Performance for Aqueous Supercapacitors

Three dimensional Ni₃S₂ nanorod arrays as multifunctional electrodes for electrochemical energy storage and conversion applications

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Bi-interface induced multi-active MCo2O4@MCo2S4@PPy (M=Ni, Zn) sandwich structure for energy storage and electrocatalysis

Cited by 291 publications

References 42 publications

“HOT” Alkaline Hydrolysis of Amorphous MOF Microspheres to Produce Ultrastable Bimetal Hydroxide Electrode with Boosted Cycling Stability

“HOT” Alkaline Hydrolysis of Amorphous MOF Microspheres to Produce Ultrastable Bimetal Hydroxide Electrode with Boosted Cycling Stability

Facile Synthesis of Sheet Stacking Structure NiCo2S4@PPy with Enhanced Rate Capability and Cycling Performance for Aqueous Supercapacitors

Three dimensional Ni3S2 nanorod arrays as multifunctional electrodes for electrochemical energy storage and conversion applications

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Facile Synthesis of Sheet Stacking Structure NiCo₂S₄@PPy with Enhanced Rate Capability and Cycling Performance for Aqueous Supercapacitors

Three dimensional Ni₃S₂ nanorod arrays as multifunctional electrodes for electrochemical energy storage and conversion applications