Mechanical Alloying Synthesis of Co9S8 Particles as Materials for Supercapacitors

Li, Bo; Hu, Yuxia; Li, Jiajia; Liu, Mao‐Cheng; Kong, Ling‐Bin; Hu, Yumei; Kang, Long

doi:10.3390/met6060142

Cited by 28 publications

(2 citation statements)

References 15 publications

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“…The two peaks at 161.4 eV and 162.6 eV can be attributed to the metal-sulfur bonds. 34,35 These XPS results are consistent with the XRD analysis mentioned above and suggest that Co 9 S 8 is successfully formed. The surface composition of the composite nanobers was also estimated from the XPS full spectra and the data was shown in Table S1.…”

Section: Characterizationsupporting

confidence: 80%

Co₉S₈nanoparticle-decorated carbon nanofibers as high-performance supercapacitor electrodes

et al. 2018

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a This work reported Co 9 S 8 nanoparticle-decorated carbon nanofibers (CNF) as a supercapacitor electrode.By using a mild ion-exchange method, the cobalt oxide-based precursor nanoparticles were transformed to Co 9 S 8 nanoparticles in a microwave hydrothermal process, and these nanoparticles were decorated onto a carbon nanofiber backbone. The composition of the nanofibers can be readily tuned by varying the Co acetate content in the precursor. The porous carbon nanofibers offered a fast electron transfer pathway while the well dispersed Co 9 S 8 nanoparticles acted as the redox center for energy storage. As a result, high specific capacitance of 718 F g À1 at 1 A g À1 can be achieved with optimized Co 9 S 8 loading. The assembled asymmetric supercapacitor with Co 9 S 8 /CNF as the cathode showed a high energy density of 23.8 W h kg À1 at a power density of 0.75 kW kg À1 and good cycling stability (16.9% loss over 10 000 cycles).

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Section: Characterizationsupporting

confidence: 80%

Co₉S₈nanoparticle-decorated carbon nanofibers as high-performance supercapacitor electrodes

et al. 2018

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“…86-2273) presence in the formed product. 30,31 Hydrothermal variation dependent stoichiometric changes for precursor elements formed different phases as shown. [32][33][34] This confirms Co 3 O 4 and MnO 2 hybrid nanostructures on the NSG sheets.…”

Section: Structure and Compositionmentioning

confidence: 98%

MnO ₂ / Co ₃ O ₄ with N and S co‐doped graphene oxide bimetallic nanocomposite for hybrid supercapacitor and photosensor applications

Kathalingam

Ramesh

Santhoshkumar

et al. 2021

Intl J of Energy Research

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This report presents the synthesis of MnO 2 /Co 3 O 4 with N and S co-doped graphene oxide (GO) hybrid composite by hydrothermal route for supercapacitor and photosensor applications. MnO 2 /Co 3 O 4 nanoflakes and nanoparticles were directly grown on dual N and S doped GO sheets, where doping was achieved using a single reagent thiourea in one-pot synthesis. Individual Co 3 O 4 and MnO 2 electrodes have poor reversibility and cycling properties due to electrolytic instability and low electrical conductivities. However, the hybrid provides good catalytic properties, and combined with highly conducting two-dimensional GO it can reduce mismatching properties due to high conductivity and layered structure. The incorporated composite sheet-like structure provides good mechanical strength with high conductivity, permitting easy ion penetration into the electrode, and providing considerably more active surfaces. Thus, the proposed hybrid material delivers significantly improved performance for supercapacitor and/or photosensor applications, achieving 614 F.g À1 specific capacitance at 1 Ag À1 , and exceeding 95% retention up to 10 000 cycles. This composite material also shows good photosensing with 1 order of increased current under visible light. K E Y W O R D Scobalt oxide, manganese oxide, MnO 2 /Co 3 O 4 @N and S co-doped GO, nitrogen and sulfur co-doping, photosensor, supercapacitor

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Metal–Organic Framework Derived Honeycomb Co₉S₈@C Composites for High‐Performance Supercapacitors

Sun

Luo

Qian

et al. 2018

Advanced Energy Materials

163

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Unique nanostructures always lead to extraordinary electrochemical energy storage performance. Here, the authors report a new strategy for using Metal‐organic frameworks (MOFs) derived cobalt sulfide in a carbon matrix with a 3D honeycombed porous structure, resulting in a high‐performance supercapacitor with unrivalled capacity of ≈1887 F g‐1 at the current density of 1 A g‐1. The honeycomb‐like structure of Co9S8@C composite is loosely adsorbed, with plentiful surface area and high conductivity, leading to improved Faradaic processes across the interface and enhanced redox reactions at active Co9S8 sites. Therefore, the heterostructure‐fabricated hybrid supercapacitor, using activated carbon as the counter electrode, demonstrates a high energy density of 58 Wh kg‐1 at the power density of 1000 W kg‐1. Even under an ultrahigh power density of 17 200 W kg‐1, its energy density maintains ≈38 Wh kg‐1. The hybrid supercapacitor also exhibits suitable cycling stability, with ≈90% capacity retention after 10 000 continuous cycles at the current density of 5 A g‐1. This work presents a practical method for using MOFs as sacrificial templates to synthesize metal‐sulfides for highly efficient electrochemical energy storage.

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Mechanical Alloying Synthesis of Co9S8 Particles as Materials for Supercapacitors

Cited by 28 publications

References 15 publications

Co₉S₈nanoparticle-decorated carbon nanofibers as high-performance supercapacitor electrodes

Co₉S₈nanoparticle-decorated carbon nanofibers as high-performance supercapacitor electrodes

MnO ₂ / Co ₃ O ₄ with N and S co‐doped graphene oxide bimetallic nanocomposite for hybrid supercapacitor and photosensor applications

Metal–Organic Framework Derived Honeycomb Co₉S₈@C Composites for High‐Performance Supercapacitors

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Mechanical Alloying Synthesis of Co9S8 Particles as Materials for Supercapacitors

Cited by 28 publications

References 15 publications

Co9S8nanoparticle-decorated carbon nanofibers as high-performance supercapacitor electrodes

Co9S8nanoparticle-decorated carbon nanofibers as high-performance supercapacitor electrodes

MnO 2 / Co 3 O 4 with N and S co‐doped graphene oxide bimetallic nanocomposite for hybrid supercapacitor and photosensor applications

Metal–Organic Framework Derived Honeycomb Co9S8@C Composites for High‐Performance Supercapacitors

Contact Info

Product

Resources

About

Co₉S₈nanoparticle-decorated carbon nanofibers as high-performance supercapacitor electrodes

Co₉S₈nanoparticle-decorated carbon nanofibers as high-performance supercapacitor electrodes

MnO ₂ / Co ₃ O ₄ with N and S co‐doped graphene oxide bimetallic nanocomposite for hybrid supercapacitor and photosensor applications

Metal–Organic Framework Derived Honeycomb Co₉S₈@C Composites for High‐Performance Supercapacitors