Electrochemical performance of CoSe<sub>2</sub> with mixed phases decorated with N-doped rGO in potassium-ion batteries

Zheng, Hui; Xu, Huashan; Hu, Jiaping; Liu, Huimin; Wei, Lianwei; Wu, Shusheng; Li, Jin; Huang, Yuanhe; Tang, Kaibin

doi:10.1039/d2ra03608h

Cited by 12 publications

(1 citation statement)

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“…We speculate that the strong interfacial interaction between the metal sulfide and carbon layer may be formed due to the C–S chemical bond formation, thus enhancing the structural integrity and charge transfer ability of the FeS/SnS@N-C composite . Moreover, the carbon coating layer by N doping can not only induce more alkali metal cation intercalation active sites but also further enhance the electrical conductivity of FeS/SnS@N-C. , …”

Section: Resultsmentioning

confidence: 91%

Rodlike FeS/SnS@N-C Core–Shell Microparticles for Lithium-Ion Batteries

Zheng

et al. 2023

Langmuir

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FeS/SnS@N-C composites were successfully synthesized through the combination of nucleation self-assembly, N-doped carbon coating, and in situ vulcanization. The experimental results show that the discharge capacitance of FeS/SnS@N-C in the lithium storage process is 796.90 mAh g–1 at 0.5 A g–1 after 200 cycles, and more importantly, the discharge capacitance can maintain 278.84 mAh g–1 at 5 A g–1 after 2000 cycles. FeS in FeS/SnS@N-C plays a key role in the electrochemical performance, which is due to the certain electronic density of states (DOS) near the Fermi level. In short, our research expands the application of transition metal sulfide composites in lithium-ion batteries.

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Section: Resultsmentioning

confidence: 91%

Rodlike FeS/SnS@N-C Core–Shell Microparticles for Lithium-Ion Batteries

Zheng

et al. 2023

Langmuir

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Unveiling the Synergistic Mechanism of Atomic Rh on Couple Phase CoSe₂/CoSeO₃ for Enhanced Alkaline Water Electrolysis Devices

Balaji,

Nguyen,

Ngo

et al. 2024

Adv Funct Materials

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Electrochemical water splitting stands out as a highly effective and environment‐friendly strategy for generating pure hydrogen. However, the expensive catalyst required, and the low efficiency of water electrolysis, are still of concern. Herein, a novel Rh–CoSe2/CoSeO3 nanocubes heterostructure is designed with a successful robust coupling between CoSe2 and CoSeO3, and employed as a bifunctional electrocatalyst for the water splitting system. The interaction enhances metal–substrate bonding and generates the anchor sites for intermediate species, which increases the electrocatalytic efficiency and mass transport kinetics, and offers exceptional stability. The water‐splitting device demonstrates remarkable performance, with a low voltage of 1.62 V at a current density of 20 mA cm−2 and long‐lasting durability for ‐100 h. This study opens a new avenue toward the creation of extremely effective and long‐lasting catalysts to be used at an industrial scale to allow alkaline water splitting and for other energy conversion devices. The Rh–CoSe2/CoSeO3 heterostructure offers promising prospects for advancing sustainable energy technologies and positively impacting the clean energy of the future.

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Electron‐Spin Regulation Driving Heterointerface Electron Distribution and Phase Transition toward Ultrafast and Durable Sodium Storage

Li,

Zhang

et al. 2024

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Phase engineering is an effective strategy for modulating the electronic structure and electron transfer mobility of cobalt selenide (CoSe2) with remarkable sodium storage. Nevertheless, it remains challenging to improve fast‐charging and cycling performance. Herein, a heterointerface coupling induces phase transformation from cubic CoSe2 to orthorhombic CoSe2 accompanied by the formation of MoSe2 to construct a CoSe2/MoSe2 heterostructure decorated with N‐doped carbon layer on a 3D graphene foam (CoSe2/MoSe2@NC/GF). The incorporated Mo cations in the bridged o‐CoSe2/MoSe2 not only act an electron donor to regulate charge‐spin configurations with more active electronic states but also trigger the upshift of d/p band centers and a decreased ∆d‐p band center gap, which greatly enhances ion adsorption capability and lowers the ion diffusion barrier. As expected, the CoSe2/MoSe2@NC/GF anode demonstrates a high‐rate capability of 447 mAh g−1 at 2 A g−1 and an excellent cyclability of 298 mAh g−1 at 1 A g−1 over 1000 cycles. The work deepens the understanding of the elaborate construction of heterostructured electrodes for high‐performance SIBs.

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Electrochemical performance of CoSe₂ with mixed phases decorated with N-doped rGO in potassium-ion batteries

Abstract: Potassium-ion batteries (PIBs) have received much attention as next-generation energy storage systems because of their abundance, low cost, and slightly lower standard redox potential than lithium-ion batteries (LIBs).

Cited by 12 publications

References 63 publications

Rodlike FeS/SnS@N-C Core–Shell Microparticles for Lithium-Ion Batteries

Rodlike FeS/SnS@N-C Core–Shell Microparticles for Lithium-Ion Batteries

Unveiling the Synergistic Mechanism of Atomic Rh on Couple Phase CoSe₂/CoSeO₃ for Enhanced Alkaline Water Electrolysis Devices

Electron‐Spin Regulation Driving Heterointerface Electron Distribution and Phase Transition toward Ultrafast and Durable Sodium Storage

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Electrochemical performance of CoSe2 with mixed phases decorated with N-doped rGO in potassium-ion batteries

Abstract: Potassium-ion batteries (PIBs) have received much attention as next-generation energy storage systems because of their abundance, low cost, and slightly lower standard redox potential than lithium-ion batteries (LIBs).

Cited by 12 publications

References 63 publications

Rodlike FeS/SnS@N-C Core–Shell Microparticles for Lithium-Ion Batteries

Rodlike FeS/SnS@N-C Core–Shell Microparticles for Lithium-Ion Batteries

Unveiling the Synergistic Mechanism of Atomic Rh on Couple Phase CoSe2/CoSeO3 for Enhanced Alkaline Water Electrolysis Devices

Electron‐Spin Regulation Driving Heterointerface Electron Distribution and Phase Transition toward Ultrafast and Durable Sodium Storage

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Product

Resources

About

Electrochemical performance of CoSe₂ with mixed phases decorated with N-doped rGO in potassium-ion batteries

Unveiling the Synergistic Mechanism of Atomic Rh on Couple Phase CoSe₂/CoSeO₃ for Enhanced Alkaline Water Electrolysis Devices