Anchoring and catalyzing polysulfides by rGO/MoS2/C modified separator in lithium–sulfur batteries

Fan, Bin; He, Qinggang; Wei, Qiuping; Liu, Wei; Zhou, Bole; Zou, Yingping

doi:10.1016/j.carbon.2023.118361

Cited by 34 publications

(3 citation statements)

References 47 publications

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“…The Nyquist plots were fitted by EIS analysis with an equivalent circuit model (Figure S13). It can be found that the PCC/PVA exhibited the smallest Rct value and semicircle compared to the PP separator, reflecting a superior kinetic process.…”

Section: Resultsmentioning

confidence: 97%

“…The Nyquist plots were fitted by EIS analysis with an equivalent circuit model (Figure S13). 55 It can be found that the PCC/PVA exhibited the smallest Rct value and semicircle compared to the PP separator, reflecting a superior kinetic process. The Li-ion transference number is the diffusion rate of lithium ions in the material, the speed of its diffusion rate also directly affects the performance of the battery.…”

Section: Electrochemical Performance Of the Pcm Separatormentioning

confidence: 92%

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High-Safety Lithium-Ion Battery Separator with Adjustable Temperature Function Inspired by the Sugar Gourd Structure

Liu,

Fan,

Shi

et al. 2024

ACS Appl. Mater. Interfaces

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As the power core of an electric vehicle, the performance of lithium-ion batteries (LIBs) is directly related to the vehicle quality and driving range. However, the charge−discharge performance and cycling performance are affected by the temperature. Excessive temperature can cause internal short circuits and even lead to safety issues, such as thermal runaway. The separator plays a crucial role in protecting the battery from regular operation, preventing direct touch between the cathode and the anode while allowing the transport of lithium ions. In this study, we have designed a thermoregulating separator in the shape of calabash, which uses melamine-encapsulated paraffin phase change material (PCM) with a wide enthalpy (0−168.52 J g -1 ) to dissipate the heat generated inside the battery promptly. Under extra-long-use conditions, the heat emitted by the battery is absorbed by the PCM without causing a significant temperature rise that triggers thermal runaway. The PCM separator can effectively suppress the temperature increase caused by battery penetration. Due to the unique structure of the PCM, the battery is short-circuited; it can significantly delay the internal temperature rise of the battery and quickly dissipate the heat, which is consistent with the characteristics of natural calabash in nutrient absorption and water diffusion, improving the melting and heat storage efficiency of the PCM. The design of the phase change separator provides an effective reference for overheat protection and improved safety in lithium-ion batteries.

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Section: Resultsmentioning

confidence: 97%

Section: Electrochemical Performance Of the Pcm Separatormentioning

confidence: 92%

High-Safety Lithium-Ion Battery Separator with Adjustable Temperature Function Inspired by the Sugar Gourd Structure

Liu,

Fan,

Shi

et al. 2024

ACS Appl. Mater. Interfaces

Self Cite

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“…The V 2 O 3 /C-HS show a lower internal resistance compared with the C-HS at the nucleation of Li 2 S, indicating that their polarization is smaller and the reaction kinetics of transforming LiPSs is faster. 38–41…”

Section: Resultsmentioning

confidence: 99%

Conductive V₂O₃ electrocatalyst on carbon hollow spheres to accelerate polysulfide conversion for long-cycle and high-rate lithium sulfur batteries

Zhang,

Xiao,

Liu

et al. 2024

Green Chem.

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Mastering Surface Sulfidation of MnP‐MnO₂ Heterostructure to Facilitate Efficient Polysulfide Conversion in Li─S Batteries

Liang,

Deng,

Ning

et al. 2024

Advanced Science

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The development of lithium–sulfur (Li─S) batteries has been hampered by the shuttling effect of lithium polysulfides (LiPSs). An effective method to address this issue is to use an electrocatalyst to accelerate the catalytic conversion of LiPSs. In this study, heterogeneous MnP‐MnO2 nanoparticles are uniformly synthesized and embedded in porous carbon (MnP‐MnO2/C) as core catalysts to improve the reaction kinetics of LiPSs. In situ characterization and density functional theory (DFT) calculations confirm that the MnP‐MnO2 heterostructure undergo surface sulfidation during the charge/discharge process, forming the MnS2 phase. Surface sulfidation of the MnP‐MnO2 heterostructure catalyst significantly accelerated the SRR and Li2S activation, effectively inhibiting the LiPSs shuttling effect. Consequently, the MnP‐MnO2/C@S cathode achieves outstanding rate performance (10 C, 500 mAh g−1) and ultrahigh cycling stability (0.017% decay rate per cycle for 2000 cycles at 5 C). A pouch cell with MnP‐MnO2/C@S cathode delivers a high energy density of 429 Wh kg−1. This study may provide a new approach to investigating the surface sulfidation of electrocatalysts, which is valuable for advancing high‐energy‐density Li−S batteries.

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Anchoring and catalyzing polysulfides by rGO/MoS2/C modified separator in lithium–sulfur batteries

Cited by 34 publications

References 47 publications

High-Safety Lithium-Ion Battery Separator with Adjustable Temperature Function Inspired by the Sugar Gourd Structure

High-Safety Lithium-Ion Battery Separator with Adjustable Temperature Function Inspired by the Sugar Gourd Structure

Conductive V₂O₃ electrocatalyst on carbon hollow spheres to accelerate polysulfide conversion for long-cycle and high-rate lithium sulfur batteries

Mastering Surface Sulfidation of MnP‐MnO₂ Heterostructure to Facilitate Efficient Polysulfide Conversion in Li─S Batteries

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Anchoring and catalyzing polysulfides by rGO/MoS2/C modified separator in lithium–sulfur batteries

Cited by 34 publications

References 47 publications

High-Safety Lithium-Ion Battery Separator with Adjustable Temperature Function Inspired by the Sugar Gourd Structure

High-Safety Lithium-Ion Battery Separator with Adjustable Temperature Function Inspired by the Sugar Gourd Structure

Conductive V2O3 electrocatalyst on carbon hollow spheres to accelerate polysulfide conversion for long-cycle and high-rate lithium sulfur batteries

Mastering Surface Sulfidation of MnP‐MnO2 Heterostructure to Facilitate Efficient Polysulfide Conversion in Li─S Batteries

Contact Info

Product

Resources

About

Conductive V₂O₃ electrocatalyst on carbon hollow spheres to accelerate polysulfide conversion for long-cycle and high-rate lithium sulfur batteries

Mastering Surface Sulfidation of MnP‐MnO₂ Heterostructure to Facilitate Efficient Polysulfide Conversion in Li─S Batteries