Cobalt and oxygen double doping induced C@MoS<sub>2</sub>–CoS<sub>2</sub>–O@C nanocomposites with an improved electronic structure and increased active sites as a high-performance anode for sodium-based dual-ion batteries

zong, Jin gui; Wang, Fei; Nie, Chang; Zhao, Mingshu; Yang, Sen

doi:10.1039/d2ta00971d

Cited by 26 publications

(11 citation statements)

References 49 publications

(43 reference statements)

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“…The position of the main peak of the CoS 2 NP@3D‐NC electrode showed a smaller change with increasing scan rate, indicating that the electrode only underwent a very small polarization. Figure S11 shows that the fitted b values of peak 1 to peak 6 of the CoS 2 NP@3D‐NC and CoS 2 /NC electrode, indicating more contribution from surface reactions during cycling [9b,e,14,18i] . As shown in Figure 6(b, c), the pseudo‐capacitance contribution of CoS 2 NP@3D‐NC was significantly higher than that of CoS 2 /NC at different scan rates, which was attributed to the special structure of CoS 2 NP@3D‐NC that enhanced the adsorption conversion of polysulfides and improved the sodium ion reaction kinetics.…”

Section: Resultsmentioning

confidence: 93%

Enhanced Polysulfides Adsorption and Conversion for High Coulombic Efficiency Sodium‐Ion Batteries

Bian,

Gao,

Zhao

et al. 2023

Batteries & Supercaps

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Transition metal sulphides based on conversion reaction mechanism have attracted much attention as anode materials for sodium ion batteries owing to their theoretical specific capacity and potential long lifespan. The unsatisfactory Coulombic efficiency, however, inhabits the cycling lifespan due to the intermediate polysulphide formation (Na2Sx; 4 ≤ x ≤ 6) and chain reactions. To enhance the polysulphide adsorption capability and capacity, a hybrid with synergistic sodium storage and polysulphide adsorption capability was designed, in which massive CoS2 nanoparticles (CoS2 NP) were utilized as electrons supplier to enhance the adsorption energy of three‐dimensional nitrogen‐doped carbon (3D‐NC) framework towards sodium polysulphide. Combining the experimental and computational results, the encapsulated CoS2 can dramatically optimize the local electronic structure and function as a powerful electron reservoir to increase the effective adsorption to Na2Sx (4 ≤ x ≤ 6). Meanwhile, the electron transferring between CoS2 NP and 3D‐NC can facilitate the conversion of Na2S to Na2Sx. An ultra‐high initial Coulombic efficiency of 98.05% and 98.38% can be achieved at current densities of 0.06 mA g‐1 and 0.4 A g‐1, respectively. Beneficial from the high reversible capability, a superior cycling lifespan is obtained up to 800 long cycles at current densities of 0.6 A g‐1.

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Section: Resultsmentioning

confidence: 93%

Enhanced Polysulfides Adsorption and Conversion for High Coulombic Efficiency Sodium‐Ion Batteries

Bian,

Gao,

Zhao

et al. 2023

Batteries & Supercaps

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“…There are very few computational reports on anode materials for DIBs. One of them is a MoS 2 –CoS 2 heterostructure for Na DIB, where it is proposed that the small size of the heterostructure can improve electronic conductivity and shorten diffusion paths [68] . A Si nanosphere@graphene anode has been designed where graphene layers are distributed on the surface of Si nanospheres [69] .…”

Section: Electrode Design For Dibsmentioning

confidence: 99%

“…One of them is a MoS 2 -CoS 2 heterostructure for Na DIB, where it is proposed that the small size of the heterostructure can improve electronic conductivity and shorten diffusion paths. [68] A Si nanosphere@graphene anode has been designed where graphene layers are distributed on the surface of Si nanospheres. [69] The anode material is found to be stable over lithiation/delithiation process up to 1000 cycles providing a high working voltage (> 4.2 V) and discharge capacity of 100 mAh g À 1 .…”

Section: Other Salt-based Dib Electrodesmentioning

confidence: 99%

Recent Advancements in Devising Computational Strategies for Dual‐Ion Batteries

2022

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Dual-ion batteries (DIBs) have been considered a viable alternative to increasingly costly and hazard-prone lithium-ion batteries (LIBs), which have reached a level of saturation. DIBs differ from LIBs in the way that the cations and anions originate from the electrolyte, thus signifying the active role played by electrolyte. In this Review, the major developments in research in the field of DIBs are summarized with a major emphasis on computational approaches in this direction. The various computational methods for understanding and designing electrodes are discussed. The advancements in electrode and electrolyte design for efficient DIBs are highlighted. Further, the ways to investigate solid-electrolyte interphase formation through simulations to comprehend the role of various components are discussed. Finally, directions are given on which future computational research can be carried out to design futuristic DIBs to provide useful guidelines to the researchers to understand and design DIBs.

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“…introduced an oxygen‐containing MoS 2 ‐CoS 2 heterojunction structure of small size on carbon nanotubes with double carbon cladding to enhance structural stability. This special structure enabled the material to reach up to 466.1 mAh g −1 at 1 A g −1 after 200 cycles [148] …”

Section: Anode Materialsmentioning

confidence: 99%

“…This special structure enabled the material to reach up to 466.1 mAh g À 1 at 1 A g À 1 after 200 cycles. [148]…”

Section: Conversion-type Materialsmentioning

confidence: 99%

Spreading the Landscape of Dual Ion Batteries: from Electrode to Electrolyte

2022

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The working mechanism of a dual-ion battery (DIB) differs from that of a lithium-ion battery (LIB) in that the anions in the electrolyte of the former can be intercalated as well. Researchers have been paying close attention to this device because of its high voltage, low price, and environmental friendliness. However, DIBs are still in their early research stages, and numerous issues need to be addressed and investigated further. Initially, this Review explains how DIBs work in principle and discusses the progress of electrode materials for cathode and anode. Furthermore, since the electrolytes used as the active material, as well as anion, solvent, and additives, have a significant impact on the DIB's capacity and voltage, the current status is also presented in terms of electrolytes, followed by an outlook on confronting the challenges. A comprehensive summary from electrode to electrolyte will guide the development of next-generation DIBs.

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Cobalt and oxygen double doping induced C@MoS₂–CoS₂–O@C nanocomposites with an improved electronic structure and increased active sites as a high-performance anode for sodium-based dual-ion batteries

Abstract: A cobalt-doping induced heterogeneous structure of MoS2-CoS2 grown on one-dimensional tubular carbon (ODTC) has been synthesized. The CoS2 nanoparticles can inhibit the free growth of MoS2 nanosheets and obtain MoS2-CoS2...

Cited by 26 publications

References 49 publications

Enhanced Polysulfides Adsorption and Conversion for High Coulombic Efficiency Sodium‐Ion Batteries

Enhanced Polysulfides Adsorption and Conversion for High Coulombic Efficiency Sodium‐Ion Batteries

Recent Advancements in Devising Computational Strategies for Dual‐Ion Batteries

Spreading the Landscape of Dual Ion Batteries: from Electrode to Electrolyte

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Cobalt and oxygen double doping induced C@MoS2–CoS2–O@C nanocomposites with an improved electronic structure and increased active sites as a high-performance anode for sodium-based dual-ion batteries

Abstract: A cobalt-doping induced heterogeneous structure of MoS2-CoS2 grown on one-dimensional tubular carbon (ODTC) has been synthesized. The CoS2 nanoparticles can inhibit the free growth of MoS2 nanosheets and obtain MoS2-CoS2...

Cited by 26 publications

References 49 publications

Enhanced Polysulfides Adsorption and Conversion for High Coulombic Efficiency Sodium‐Ion Batteries

Enhanced Polysulfides Adsorption and Conversion for High Coulombic Efficiency Sodium‐Ion Batteries

Recent Advancements in Devising Computational Strategies for Dual‐Ion Batteries

Spreading the Landscape of Dual Ion Batteries: from Electrode to Electrolyte

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Cobalt and oxygen double doping induced C@MoS₂–CoS₂–O@C nanocomposites with an improved electronic structure and increased active sites as a high-performance anode for sodium-based dual-ion batteries