Tailoring the shell thickness of yolk–shell structured carbon microspheres: applications in metal selenide and carbon composite microspheres for enhanced sodium ion storage properties

Seo, Hyo Yeong; Choi, Jae Hyeon; Kim, Yeong Beom; Cho, Jung Sang; Kang, Yun Chan; Park, Gi Dae

doi:10.1039/d3ta04705a

Cited by 15 publications

(6 citation statements)

References 79 publications

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“…At the voltage where phase transition occurs during charge/discharge, Na + needs to cross the two-phase boundary and overcome the resistance from the surrounding ions, resulting in a sharp decrease in D Na+ value. 56 The fast diffusion of Na + in the electrode would contribute to achieving excellent rate performance. To further understand the charge− discharge process, the EIS of the electrode was tested after different charge−discharge cycles, as shown in Figure 7i.…”

Section: Resultsmentioning

confidence: 99%

One-Step Solid Phase Synthesis of NiCo₂Se₄/Carbon Nanotube Nanocomposites for Hybrid Supercapacitors and Sodium-Ion Batteries

Li,

Zhang,

et al. 2024

ACS Appl. Nano Mater.

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To overcome the inherent drawbacks of traditional solid-phase synthesis methods, this paper reported an in situ solidphase synthesis method for preparing NiCo 2 Se 4 /carbon nanotube (NiCo 2 Se 4 /CNT) nanocomposite. By this method, NiCo 2 Se 4 nanospheres are loaded onto the surface and inside the 3D conductive framework constructed by CNTs. This unique morphology provides conductivity and structural stability to the synthesized nanocomposite, resulting in good rate capability and cycling performance in both hybrid supercapacitor and sodium-ion battery applications. The hybrid supercapacitor device based on the synthesized nanocomposite can deliver an energy density of 33.32 Wh kg −1 at a power density of 0.844 kW kg −1 while retaining 67.5% of energy density at a high power density of 11.73 kW kg −1 . After 20 000 cycles, the energy density still reaches 91.6% of that in the initial cycle. When employed as an anode material for SIBs, the synthesized nanocomposite exhibits a high reversible specific capacity of 367.1 mAh g −1 with a Coulombic efficiency of 99.27% after 300 cycles at 0.1 A g −1 , while 91.3% of the specific capacity is retained as the current density rises from 0.1 to 3 A g −1 . After 500 cycles at a current density of 2.0 A g −1 , the reversible specific capacity of the synthesized nanocomposite reaches 319 mAh g −1 with a very low specific capacity attenuation of 0.021% per cycle. The developed method contributes to reducing the cost of preparing TMSe-based electrode materials while achieving high performance, thus boosting its application in electrochemical energy storage systems.

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Section: Resultsmentioning

confidence: 99%

One-Step Solid Phase Synthesis of NiCo₂Se₄/Carbon Nanotube Nanocomposites for Hybrid Supercapacitors and Sodium-Ion Batteries

Li,

Zhang,

et al. 2024

ACS Appl. Nano Mater.

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“…The phase separation is typically inevitable, making the construction of a core–shell structure one of the effective methods to address this issue. 28,80,81 However, the complex and cumbersome preparation process poses a challenge. Zhang 82 reported a core–shell NiSe/C composite through a facial two-step method.…”

Section: Part 2 Modifying Methods: Structure To Performancementioning

confidence: 99%

“…This characteristic leads to higher metal-selenide bond dynamic reactivity and minimal volume change, accelerating the kinetics of the conversion reaction and resulting in higher sodium storage activity, excellent reversibility, and comprehensive electrochemical performance. 25–31…”

Section: Introductionmentioning

confidence: 99%

“…For example, compositing M x Se y with carbon materials known for their excellent conductivity, such as carbon nanotubes (CNTs), graphene sheets, and amorphous carbon, is an effective approach to enhance the electrical conductivity while preserving the structural stability of the anode materials. 38–40 The design of nanostructures for M x Se y , such as core–shell structures, ultra-small sizes, and hollow micro-cages, 28,41,42 represents another effective approach to mitigate volume expansion. Nanosized materials are believed to enhance the diffusion rate of electrons and ions by reducing diffusion distances.…”

Section: Introductionmentioning

confidence: 99%

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Towards metal selenides: a promising anode for sodium-ion batteries

Liu,

Xu,

Shao

et al. 2024

Chem. Commun.

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“…All authors have read and agreed to the published ver- In addition to being used in Li-S batteries, bimetallic selenides can also be used in other types of batteries (lithium-ion batteries, sodium-ion batteries, magnesium-ion batteries, et al), various supercapacitors, electrocatalysts for hydrogen evolution reaction, oxygen evolution reaction, etc. [51][52][53][54][55][56][57]. Therefore, the designed bimetallic selenides in this paper can also be extended to other fields.…”

Section: Supplementary Materialsmentioning

confidence: 99%

Optimized Adsorption–Catalytic Conversion for Lithium Polysulfides by Constructing Bimetallic Compounds for Lithium–Sulfur Batteries

Chen,

Wang,

et al. 2024

Materials

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Although lithium–sulfur batteries possess the advantage of high theoretical specific capacity, the inevitable shuttle effect of lithium polysulfides is still a difficult problem restricting its application. The design of highly active catalysts to promote the redox reaction during charge–discharge and thus reduce the existence time of lithium polysulfides in the electrolyte is the mainstream solution at present. In particular, bimetallic compounds can provide more active sites and exhibit better catalytic properties than single-component metal compounds by regulating the electronic structure of the catalysts. In this work, bimetallic compounds-nitrogen-doped carbon nanotubes (NiCo)Se2-NCNT and (CuCo)Se2-NCNT are designed by introducing Ni and Cu into CoSe2, respectively. The (CuCo)Se2-NCNT delivers an optimized adsorption–catalytic conversion for lithium polysulfide, benefitting from adjusted electron structure with downshifted d-band center and increased electron fill number of Co in (CuCo)Se2 compared with that of (NiCo)Se2. This endows (CuCo)Se2 moderate adsorption strength for lithium polysulfides and better catalytic properties for their conversion. As a result, the lithium–sulfur batteries with (CuCo)Se2-NCNT achieve a high specific capacity of 1051.06 mAh g−1 at 1C and an enhanced rate property with a specific capacity of 838.27 mAh g−1 at 4C. The work provides meaningful insights into the design of bimetallic compounds as catalysts for lithium–sulfur batteries.

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Tailoring the shell thickness of yolk–shell structured carbon microspheres: applications in metal selenide and carbon composite microspheres for enhanced sodium ion storage properties

Abstract: The yolk-shell structured material, characterized by its core@void@shell configuration, has garnered considerable attention as an anode material for sodium ion batteries due to its advantageous internal void space, large surface...

Cited by 15 publications

References 79 publications

One-Step Solid Phase Synthesis of NiCo₂Se₄/Carbon Nanotube Nanocomposites for Hybrid Supercapacitors and Sodium-Ion Batteries

One-Step Solid Phase Synthesis of NiCo₂Se₄/Carbon Nanotube Nanocomposites for Hybrid Supercapacitors and Sodium-Ion Batteries

Towards metal selenides: a promising anode for sodium-ion batteries

Optimized Adsorption–Catalytic Conversion for Lithium Polysulfides by Constructing Bimetallic Compounds for Lithium–Sulfur Batteries

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Tailoring the shell thickness of yolk–shell structured carbon microspheres: applications in metal selenide and carbon composite microspheres for enhanced sodium ion storage properties

Abstract: The yolk-shell structured material, characterized by its core@void@shell configuration, has garnered considerable attention as an anode material for sodium ion batteries due to its advantageous internal void space, large surface...

Cited by 15 publications

References 79 publications

One-Step Solid Phase Synthesis of NiCo2Se4/Carbon Nanotube Nanocomposites for Hybrid Supercapacitors and Sodium-Ion Batteries

One-Step Solid Phase Synthesis of NiCo2Se4/Carbon Nanotube Nanocomposites for Hybrid Supercapacitors and Sodium-Ion Batteries

Towards metal selenides: a promising anode for sodium-ion batteries

Optimized Adsorption–Catalytic Conversion for Lithium Polysulfides by Constructing Bimetallic Compounds for Lithium–Sulfur Batteries

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One-Step Solid Phase Synthesis of NiCo₂Se₄/Carbon Nanotube Nanocomposites for Hybrid Supercapacitors and Sodium-Ion Batteries

One-Step Solid Phase Synthesis of NiCo₂Se₄/Carbon Nanotube Nanocomposites for Hybrid Supercapacitors and Sodium-Ion Batteries