MnO2 supported on acrylic cloth as functional separator for high-performance lithium–sulfur batteries

Zuo, Yinze; Zhu, Yuejin; Tang, Xinsong; Zhao, Meng; Ren, Peijia; Su, Weiming; Tang, Yuefeng; Chen, Yanfeng

doi:10.1016/j.jpowsour.2020.228181

Cited by 47 publications

(21 citation statements)

References 41 publications

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“…Particularly, the subsequent CV profiles of the third to fifth cycles overlap well, indicating the highly reversible electrochemical process. 38,39 Figure 3b shows the rate performance of the cell assembled with various separators. The cell with the CB-COF exhibits an outstanding initial capacity of 1187 mA h g −1 at 0.1 C, while for the cell with the SP-equipped separator, it is 928 mA h g −1 .…”

Section: Resultsmentioning

confidence: 99%

Amphiphilic Carborane-Based Covalent Organic Frameworks as Efficient Polysulfide Nano-Trappers for Lithium–Sulfur Batteries

Zhu

Yang

Qiu

et al. 2021

ACS Appl. Mater. Interfaces

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Lithium–sulfur batteries (LSBs) have been considered as one of the most promising energy storage systems because of their high theoretical energy density. However, the “shuttle effect” caused by polysulfide results in poor cycling stability and low electrochemical properties, which strongly impedes the practical application of LSBs. Herein, a kind of amphiphilic carborane-based covalent organic framework (CB-COF) is synthesized and treated as nano-trappers for polysulfide. The microporous CB-COFs show high-temperature resistance and excellent chemical stability. Both experimental results and theoretical calculation indicate the strong adsorption ability of CB-COF for polysulfides. Such an ability makes CB-COF a candidate separator material for LSBs, which efficiently suppresses the “shuttle effect,” leading to a high-rate capacity (314 mA h g–1 after 1000 cycles at 2.5 C) and an ultra-long cycling life (after 1000 cycles with a very low decay rate of 0.0395% per cycle at 1 C) of LSBs.

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Section: Resultsmentioning

confidence: 99%

Amphiphilic Carborane-Based Covalent Organic Frameworks as Efficient Polysulfide Nano-Trappers for Lithium–Sulfur Batteries

Zhu

Yang

Qiu

et al. 2021

ACS Appl. Mater. Interfaces

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“…[ 19 ] However, most of the equivalent elements fail to provide a verified explanation for the underlying physical meaning of the specific electrochemical process. [ 20 ] Resistor–Capacitor ( R – C ) parallel circuits are optionally combined serially or parallelly to generate an equivalent circuit in most cases regardless of a reasonable physical meaning, [ 21 ] and the simulated kinetic parameters are therefore ambiguous and cannot afford an accurate interpretation of the impedance responses of the LiPS symmetric cells. Talian et al reported a transmission‐line model‐based grid circuit model from the analytical Newman's model.…”

Section: Introductionmentioning

confidence: 99%

Understanding the Impedance Response of Lithium Polysulfide Symmetric Cells

et al. 2021

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Lithium–sulfur (Li–S) batteries are highly considered for next‐generation energy storage due to their ultrahigh theoretical energy density of 2600 Wh kg−1. The conversion reactions between lithium polysulfides (LiPSs) constitute the core process in working Li–S batteries. Electrochemical impedance spectroscopy (EIS) analysis of LiPS symmetric cells is an effective tool to provide detailed information on the LiPS conversion reactions and direct further kinetic promotion. However, reasonable interpretation of the EIS responses is so far insufficiently addressed without a well‐defined equivalent circuit. Herein, a systematic analysis on the EIS responses of LiPS symmetric cells is conducted to provide a comprehensible equivalent circuit. Interfacial contact, surface reaction, and diffusion are decoupled according to their respective characteristic frequency using the distribution of relaxation time analysis method. A well‐defined equivalent circuit is proposed to accurately fit the experimental EIS responses, unambiguously interpret key parameters, and be feasible with a wide range of experimental conditions. This work presents the methodology of understanding the EIS responses of LiPS symmetric cells and inspires analogous analysis on vital electrochemical processes.

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“…[7][8][9] Besides, the sulfur cathode materials are abundant and friendly for the environment. 10 However, there are also some disadvantages for Li-S batteries. (i) Poor electronic conductivity of the element sulfur leads to low specific capacity, (ii) severe polysulfide migration causes rapid capacity fading during electrochemical cycles, and (iii) the huge volume change of sulfur results in structural collapse.…”

Section: Introductionmentioning

confidence: 99%

“…The theoretical specific capacity and energy density for Li–S batteries are 1675 mAh g −1 and 2600 Wh Kg −1 , respectively 7–9 . Besides, the sulfur cathode materials are abundant and friendly for the environment 10 …”

Section: Introductionmentioning

confidence: 99%

Novel starfish‐like Mo₂C framework as efficient sulfur host for high electrochemical performance lithium–sulfur batteries

Zhao

Wei

2020

J of Chemical Tech & Biotech

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BACKGROUND: Lithium-sulfur (Li-S) batteries are one of the most suitable energy storage devices for electronic requirements due to their high energy density and specific capacity. In the past decades, many researchers have devoted themselves to developing high performance Li-S batteries. However, the application of Li S batteries continues to be hindered because of the severe polysulfide migration upon electrochemical cycles. In this work, novel starfish-like Molybdenum carbide (Mo 2 C) framework was prepared and used as cathode host materials for sulfur. Due to the presence of the Mo 2 C framework, the polysulfide migration can be efficiently inhibited. RESULTS: The as-prepared Mo 2 C/S composites exhibited a high initial specific capacity of 1396 mAh g −1 at the current density of 0.1 C. Moreover, the Mo 2 C/S composites displayed a high capacity of 936 mAh g −1 at 1 C after 300 cycles. CONCLUSION: The Li S batteries demonstrate superior cycling stability and high specific capacity via using Mo 2 C/S composites cathode.

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MnO2 supported on acrylic cloth as functional separator for high-performance lithium–sulfur batteries

Cited by 47 publications

References 41 publications

Amphiphilic Carborane-Based Covalent Organic Frameworks as Efficient Polysulfide Nano-Trappers for Lithium–Sulfur Batteries

Amphiphilic Carborane-Based Covalent Organic Frameworks as Efficient Polysulfide Nano-Trappers for Lithium–Sulfur Batteries

Understanding the Impedance Response of Lithium Polysulfide Symmetric Cells

Novel starfish‐like Mo₂C framework as efficient sulfur host for high electrochemical performance lithium–sulfur batteries

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MnO2 supported on acrylic cloth as functional separator for high-performance lithium–sulfur batteries

Cited by 47 publications

References 41 publications

Amphiphilic Carborane-Based Covalent Organic Frameworks as Efficient Polysulfide Nano-Trappers for Lithium–Sulfur Batteries

Amphiphilic Carborane-Based Covalent Organic Frameworks as Efficient Polysulfide Nano-Trappers for Lithium–Sulfur Batteries

Understanding the Impedance Response of Lithium Polysulfide Symmetric Cells

Novel starfish‐like Mo2C framework as efficient sulfur host for high electrochemical performance lithium–sulfur batteries

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Product

Resources

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Novel starfish‐like Mo₂C framework as efficient sulfur host for high electrochemical performance lithium–sulfur batteries