Carbon-encapsulated CoS2 nanoparticles anchored on N-doped carbon nanofibers derived from ZIF-8/ZIF-67 as anode for sodium-ion batteries

Zhang, Wenming; Yue, Ziwei; Wang, Qiming; Zeng, Xiaoxi; Fu, C. D.; Li, Qing; Li, Xiaoting; Fang, Lide; Li, Ling

doi:10.1016/j.cej.2019.122548

Cited by 109 publications

(50 citation statements)

References 45 publications

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“…In Figure 1c, the detailed Co 2p spectrum possesses two spin-orbit doublets that are characteristic of Co 2+ and Co 3+ . In addition, two characteristic satellites at 803.1 and 786.7 eV indicate the high-spin Co 2+ of the rGO@CVO composite [31]. These results confirm that the mixture of V 5+ , V 4+ , Co 2+ and Co 3+ in the rGO@CVO composite.…”

Section: Resultssupporting

confidence: 72%

Co3V2O8 Nanoparticles Supported on Reduced Graphene Oxide for Efficient Lithium Storage

Shang

2020

Nanomaterials

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Co3V2O8 (CVO) with high theoretical specific capacity derived from the multiple oxidation states of V and Co is regarded as a potential electrode material for lithium-ion batteries (LIBs). Herein, reduced graphene oxide (rGO)-supported ultrafine CVO (rGO@CVO) nanoparticles are successfully prepared via the hydrothermal and subsequent annealing processes. The CVO supported on 2D rGO nanosheets possess excellent structural compatibility for the accommodation of volume variation to maintain the structural integrity of an electrode during the repeated lithiation/delithiation process. On the other hand, the rGO, as a highly-conductive network in the rGO@CVO composite, facilitates rapid charge transfer to ensure fast reaction kinetics. Moreover, the CV kinetic analysis indicates that the capacity of rGO@CVO is mainly dominated by a pseudocapacitive process with favorable rate capability. As a result, the rGO@CVO composite exhibits improved specific capacity (1132 mAh g−1, 0.1 A g−1) and promising rate capability (482 mAh g−1, 10 A g−1).

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Section: Resultssupporting

confidence: 72%

Co3V2O8 Nanoparticles Supported on Reduced Graphene Oxide for Efficient Lithium Storage

Shang

2020

Nanomaterials

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“…Co 9 S 8 nanoparticles encapsulated within carbon-nanoparticledecorated carbon flower-like spherical structure A high reversible capacity of 382 mAh g À1 at 0.1 A g À1 after 100 cycles [137] Electrospinning followed by an annealing treatment Amorphous and graphite carbonencapsulated CoS 2 nanoparticles anchored on the porous nanofibers structure A reversible capacity of 148 mAh g À1 at 3.2 A g À1 after 1000 cycles [143] Solvothermal method…”

Section: Hydrothermal Methodsmentioning

confidence: 99%

“…Zhang and co-workers [143] utilized a simple electrospinning approach and a subsequent calcination process to successfully anchor amorphous and graphite carbon-encapsulated CoS 2 nanoparticles onto nitrogen-rich high-porosity carbon nanofibers with Zn/Co-based MOF as the template; this preparation is schematically depicted in Fig. 7(a).…”

Section: Heteroatom-doped Carbon Modificationmentioning

confidence: 99%

See 2 more Smart Citations

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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Unraveling the Voltage Failure Mechanism in Metal Sulfide Anodes for Sodium Storage and Improving Their Long Cycle Life by Sulfur‐Doped Carbon Protection

Wang

Han

et al. 2020

Adv Funct Materials

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Metal sulfides are emerging as a promising anode material for sodium-ion batteries with high reversible capacities and fast reaction kinetics, but achieving long-cycling-life remains a great challenge. Here, taking cobalt sulfide as an example, its electrochemical sodium-ion storage failure phenomenon is first reported, which indicates that the battery cannot reach the cutoff voltage during charging. Detailed analyses demonstrate that such failure may originate from the dissolution and escape of polysulfide intermediates, further reacting with the released copper-ions from the current collector and inducing the occurrence of the shuttle effect. Based on the explored failure mechanism, a sulfur-doped carbon matrix with polar carbon sulfur bonds, which can firmly immobilize the dissolved polysulfides, is deliberately introduced into the Co 1−x S active particles (Co 1−x S/s-C) to improve their cycle stability. Consequently, the cycle life of the Co 1−x S/s-C anode for sodium-ion storage is extended from the original 125 to present 2000 cycles, even at high-rate current densities. Moreover, utilizing the carbon current collector instead of traditional copper can effectively delay the occurrence of the failure phenomenon. The present work promotes better fundamental understanding of the structural evolution of metal sulfide anodes during cycles, and the solution strategy can be extended to apply in other metal sulfides (ZnS, NiS).

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Carbon-encapsulated CoS2 nanoparticles anchored on N-doped carbon nanofibers derived from ZIF-8/ZIF-67 as anode for sodium-ion batteries

Cited by 109 publications

References 45 publications

Co3V2O8 Nanoparticles Supported on Reduced Graphene Oxide for Efficient Lithium Storage

Co3V2O8 Nanoparticles Supported on Reduced Graphene Oxide for Efficient Lithium Storage

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

Unraveling the Voltage Failure Mechanism in Metal Sulfide Anodes for Sodium Storage and Improving Their Long Cycle Life by Sulfur‐Doped Carbon Protection

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