Hierarchical (Ni,Co)Se2/CNT hybrid microspheres consisting of a porous yolk and embossed hollow thin shell for high-performance anodes in sodium-ion batteries

Oh, Se Hwan; Cho, Jung Sang

doi:10.1016/j.jallcom.2019.07.351

Cited by 36 publications

(22 citation statements)

References 42 publications

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“…As shown in Figure 3d, the Co 2p spectrum showed each of the deconvoluted three peaks in the two doublet peaks, Co 2p 3/2 and Co 2p 1/2 . Co 2+ peaks, located at 780.6 and 796.6 eV, were attributed to CoSe₂ [21,22]. The existence of the Co 3+ peaks in the Co 2p spectrum was due to the partial surface oxidation of PZCN under air atmosphere [23,24].…”

Section: Resultsmentioning

confidence: 99%

“…Additionally, shake-up satellites at higher-energy were caused by the antibonding orbital between selenium and cobalt atoms. The Se 3d spectrum (Figure 3e) showed two deconvoluted peaks, at 55.0 and 55.9 eV, corresponding to Se 3d 5/2 and Se 3d 3/2 for metal selenides, respectively [19,20,21,22]. The peaks located within 58–61 eV originated from Co 3p and Se–O bonding, attributed to metal selenide partial surface oxidation.…”

Section: Resultsmentioning

confidence: 99%

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Porous Hybrid Nanofibers Comprising ZnSe/CoSe₂/Carbon with Uniformly Distributed Pores as Anodes for High-Performance Sodium-Ion Batteries

Jeong

Cho

2019

Nanomaterials

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Well-designed porous structured bimetallic ZnSe/CoSe₂/carbon composite nanofibers with uniformly distributed pores were prepared as anodes for sodium-ion batteries by electrospinning and subsequent simple heat-treatment processes. Size-controlled polystyrene (PS) nanobeads in the electrospinning solution played a key role in the formation and uniform distribution of pores in the nanofiber structure, after the removal of selected PS nanobeads during the heat-treatment process. The porous ZnSe/CoSe₂/C composite nanofibers were able to release severe mechanical stress/strain during discharge–charge cycles, introduce larger contact area between the active materials and the electrolyte, and provide more active sites during cycling. The discharge capacity of porous ZnSe/CoSe2/C composite nanofibers at the 10,000th cycle was 297 mA h g−1, and the capacity retention measured from the second cycle was 81%. The final rate capacities of porous ZnSe/CoSe2/C composite nanofibers were 438, 377, 367, 348, 335, 323, and 303 mA h g−1 at current densities of 0.1, 0.5, 1, 3, 5, 7, and 10 A g−1, respectively. At the higher current densities of 10, 20, and 30 A g−1, the final rate capacities were 310, 222, and 141 mA h g−1, respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Porous Hybrid Nanofibers Comprising ZnSe/CoSe₂/Carbon with Uniformly Distributed Pores as Anodes for High-Performance Sodium-Ion Batteries

Jeong

Cho

2019

Nanomaterials

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“…The PS nanobeads with a diameter of 100 nm were prepared by emulsion polymerization method, which is described in the authors’ previous work. [ 60–63 ] The prepared spinning solution was loaded into a plastic syringe equipped with a 23‐gauge stainless‐steel nozzle, ejected at a flow rate of 1.0 mL h −1 , and electrospun onto a drum collector. During electrospinning, the distance between the tip and the collector was maintained at 12 cm, while the rotation speed of the drum was maintained at 150 rpm.…”

Section: Methodsmentioning

confidence: 99%

Porous SnO₂/C Nanofiber Anodes and LiFePO₄/C Nanofiber Cathodes with a Wrinkle Structure for Stretchable Lithium Polymer Batteries with High Electrochemical Performance

Kwon

et al. 2020

Advanced Science

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Stretchable lithium batteries have attracted considerable attention as components in future electronic devices, such as wearable devices, sensors, and body‐attachment healthcare devices. However, several challenges still exist in the bid to obtain excellent electrochemical properties for stretchable batteries. Here, a unique stretchable lithium full‐cell battery is designed using 1D nanofiber active materials, stretchable gel polymer electrolyte, and wrinkle structure electrodes. A SnO2/C nanofiber anode and a LiFePO4/C nanofiber cathode introduce meso‐ and micropores for lithium‐ion diffusion and electrolyte penetration. The stretchable full‐cell consists of an elastic poly(dimethylsiloxane) (PDMS) wrapping film, SnO2/C and LiFePO4/C nanofiber electrodes with a wrinkle structure fixed on the PDMS wrapping film by an adhesive polymer, and a gel polymer electrolyte. The specific capacity of the stretchable full‐battery is maintained at 128.3 mAh g−1 (capacity retention of 92%) even after a 30% strain, as compared with 136.8 mAh g−1 before strain. The energy densities are 458.8 Wh kg−1 in the released state and 423.4 Wh kg−1 in the stretched state (based on the electrode), respectively. The high capacity and stability in the stretched state demonstrate the potential of the stretchable battery to overcome its limitations.

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“…Moreover, they effectively form conducting networks that suppress the aggregation of active components, which further significantly improves the conductivity of the electrodes. Consequently, this structure has been exploited as a significant 1D carbon-supported nanostructure to integrate with electroactive materials for application as anodes in SIBs [118][119][120][121].…”

Section: Anchored Onto Carbon Nanotubesmentioning

confidence: 99%

Towards high-performance anodes: Design and construction of cobalt-based sulfide materials for sodium-ion batteries

Guan

et al. 2021

Journal of Energy Chemistry

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Hierarchical (Ni,Co)Se2/CNT hybrid microspheres consisting of a porous yolk and embossed hollow thin shell for high-performance anodes in sodium-ion batteries

Cited by 36 publications

References 42 publications

Porous Hybrid Nanofibers Comprising ZnSe/CoSe₂/Carbon with Uniformly Distributed Pores as Anodes for High-Performance Sodium-Ion Batteries

Porous Hybrid Nanofibers Comprising ZnSe/CoSe₂/Carbon with Uniformly Distributed Pores as Anodes for High-Performance Sodium-Ion Batteries

Porous SnO₂/C Nanofiber Anodes and LiFePO₄/C Nanofiber Cathodes with a Wrinkle Structure for Stretchable Lithium Polymer Batteries with High Electrochemical Performance

Towards high-performance anodes: Design and construction of cobalt-based sulfide materials for sodium-ion batteries

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Hierarchical (Ni,Co)Se2/CNT hybrid microspheres consisting of a porous yolk and embossed hollow thin shell for high-performance anodes in sodium-ion batteries

Cited by 36 publications

References 42 publications

Porous Hybrid Nanofibers Comprising ZnSe/CoSe₂/Carbon with Uniformly Distributed Pores as Anodes for High-Performance Sodium-Ion Batteries

Porous Hybrid Nanofibers Comprising ZnSe/CoSe₂/Carbon with Uniformly Distributed Pores as Anodes for High-Performance Sodium-Ion Batteries

Porous SnO2/C Nanofiber Anodes and LiFePO4/C Nanofiber Cathodes with a Wrinkle Structure for Stretchable Lithium Polymer Batteries with High Electrochemical Performance

Towards high-performance anodes: Design and construction of cobalt-based sulfide materials for sodium-ion batteries

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Porous SnO₂/C Nanofiber Anodes and LiFePO₄/C Nanofiber Cathodes with a Wrinkle Structure for Stretchable Lithium Polymer Batteries with High Electrochemical Performance