Cobalt sulfide quantum dot embedded in nitrogen/sulfur-doped carbon nanosheets as a polysulfide barrier in Li-S batteries

Lu, Haochen; Guo, Qiubo; Fan, Q.; Li, Xue; Lu, Xingyu; Qi, Jianqi; Xia, Hui

doi:10.1016/j.jallcom.2021.159341

Cited by 33 publications

(22 citation statements)

References 49 publications

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“…These results further confirm the positive contribution of ZnS nanolayer coating in the carbon-based sulfur cathode, and the thickness of ZnS is essential to the electrochemical performance of the resultant Li-S battery. The cycling stability could be further improved by using a metal sulfide-based additional layer between the cathode and the separator as confirmed by the previous report [56]. Nevertheless, it is the incomplete conversion of polysulfide that leads to the capacity fading of the cell.…”

Section: Resultssupporting

confidence: 56%

ZnS nanolayer coated hollow carbon spheres with enhanced rate and cycling performance for Li-S batteries

Meng

Long

et al. 2021

Sci. China Technol. Sci.

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Conductive carbon structure has been considered as a promising sulfur-hosting material as the cathode of lithium-sulfur batteries. However, the issue of polysulfide shuttling requires an additional component to help restrict and convert sulfur substances. Herein, in this work, hollow and porous carbon nanospheres (HCS) are synthesized by a template method and a high-temperature carbonization treatment. A thin layer of ZnS coating is then deposited on the HCS-based sulfur (ZnS@HCS/S) cathode with controlled thickness, and the overall electrochemical properties are systematically evaluated. Results show that with 30 nm-thick ZnS coating, the cathode reveals an improved capacity of 1411 mA h g −1 , and higher capacities from 0.2 to 3 C rate compared with bare HCS/S cathode. Moreover, the ZnS coating also enhances the cycling stability of ZnS@HCS/S cathode over 280 cycles at 0.5 C, with only 0.2% capacity decay per cycle. This work demonstrates potential applications for high-performance lithiumsulfur batteries.

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Section: Resultssupporting

confidence: 56%

ZnS nanolayer coated hollow carbon spheres with enhanced rate and cycling performance for Li-S batteries

Meng

Long

et al. 2021

Sci. China Technol. Sci.

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“…A tiny peak at the highest frequencies corresponds to the Ohmic drop due to electrolytic resistances (Peak P1). The peak within the 10 2 to 10 4 Hz regime corresponds to lithium metal, which is related to the charge transfer processes along the metal surface (Peak P2) [ 56 , 57 ]. The peak shifts towards low frequencies with initial cycling but vanishes after 100 cycles, indicating loss of the reactivity of the lithium metal.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Performance of Orthorhombic CsPbI3 Perovskite in Li-Ion Batteries

et al. 2021

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A facile solution process was employed to prepare CsPbI3 as an anode material for Li-ion batteries. Rietveld refinement of the X-ray data confirms the orthorhombic phase of CsPbI3 at room temperature. As obtained from bond valence calculations, strained bonds between Pb and I are identified within PbI6 octahedral units. Morphological study shows that the as-prepared δ-CsPbI3 forms a nanorod-like structure. The XPS analysis confirm the presence of Cs (3d, 4d), Pb (4d, 4f, 5d) and I (3p,3d, 4d). The lithiation process involves both intercalation and conversion reactions, as confirmed by cyclic voltammetry (CV) and first-principles calculations. Impedance spectroscopy coupled with the distribution function of relaxation times identifies charge transfer processes due to Li metal foil and anode/electrolyte interfaces. An initial discharge capacity of 151 mAhg−1 is found to continuously increase to reach a maximum of ~275 mAhg−1 at 65 cycles, while it drops to ~240 mAhg−1 at 75 cycles and then slowly decreases to 235 mAhg−1 at 100 cycles. Considering the performance and structural integrity during electrochemical performance, δ-CsPbI3 is a promising material for future Li-ion battery (LIB) application.

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“…With the assistance of metal sulfides as the hosts for a sulfur cathode, there has been considerable progress in enhancing sulfur loading and the specific capacity of the cell. [ 134,135 ] Ye et al [ 136 ] studied a layered MoS 3 to enhance the sulfiphilic property of the sulfur cathode. A chain‐like amorphous structure of MoS 3 with an exceedingly high loading of 7.1 mg cm −2 was achieved to deliver an initial capacity of ≈248 mAh g −1 and a stable cycle life of about 200 cycles.…”

Section: Progress Toward Cathode System In a Metal–sulfur Interacted ...mentioning

confidence: 99%

Exploration of the Unique Structural Chemistry of Sulfur Cathode for High‐Energy Rechargeable Beyond‐Li Batteries

Sungjemmenla

Soni

Vineeth

et al. 2021

Adv Energy and Sustain Res

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The increased demand for energy has prompted users to seek alternative energy storage devices. Post‐Li‐ion battery chemistries have been considered potential contenders for the development of next‐generation battery technologies. The high specific capacity (≈1675 mAh g−1) and high natural abundance (≈953 ppm) of sulfur provide opportunities to meet the rigorous requirements of the market's demands, such as high energy density and low cost. When combined with a high capacity metal anode (e.g., Na ≈ 1165 mAh g−1, Mg ≈ 2205 mAh g−1, and Al ≈2980 mAh g−1), it leads to high energy density that can outperform the existing battery technologies, including high‐energy Li‐ion batteries. Despite the unique attributes of the sulfur‐based battery system, it remains in infancy owing to the complex reaction chemistry of sulfur cathode, and the level of complexity increases with an increase in valency of metal ions. This review summarizes the unique aspects of a sulfur cathode essential to stabilizing sulfur cathode‐based high‐energy rechargeable batteries. Furthermore, deeper insight into the electrochemical performance of various metal–sulfur‐based systems has been provided. This review may pave the path for the researchers to accelerate the development of sulfur cathode for post‐Li‐ion batteries.

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Cobalt sulfide quantum dot embedded in nitrogen/sulfur-doped carbon nanosheets as a polysulfide barrier in Li-S batteries

Cited by 33 publications

References 49 publications

ZnS nanolayer coated hollow carbon spheres with enhanced rate and cycling performance for Li-S batteries

ZnS nanolayer coated hollow carbon spheres with enhanced rate and cycling performance for Li-S batteries

Electrochemical Performance of Orthorhombic CsPbI3 Perovskite in Li-Ion Batteries

Exploration of the Unique Structural Chemistry of Sulfur Cathode for High‐Energy Rechargeable Beyond‐Li Batteries

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