Carbon nanotube doped active carbon coated separator for enhanced electrochemical performance of lithium–sulfur batteries

Guo, Yafang; Xiao, Jiang; Hou, Yongxuan; Wang, Zhiyong; Jiang, Aihua

doi:10.1007/s10854-017-7679-7

Cited by 19 publications

(9 citation statements)

References 29 publications

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“…It is clear from the diagram that the surface of the carbon particles at the positive pole is relatively smooth before cycle. The surface of the carbon particles deposited has a large amount of scale-like pimples after cycle, these uniformly distributed pimples are intermediate products Li 2 S n , which is intercepts by the AC/S-1 cathode during the charging and discharging of the battery (Guo et al, 2017a , b ). The EDS surface scan of the four elements (S, C, O, F) of AC/S-1 cathode before and after cycle in Figure 4a .…”

Section: Resultsmentioning

confidence: 99%

“…In order to solve these problems, people have made a lot of meaningful efforts, for example, designing of cathode material (Xiao et al, 2015a ; Zhao et al, 2017 ), the modification of separator (Guo et al, 2017a , b , 2018 ), the protection of negative electrode and the improvement of electrolyte system (Yan et al, 2013 ; Chen et al, 2017 ). In these researches, the exploration of sulfur cathode materials is particularly outstanding.…”

Section: Introductionmentioning

confidence: 99%

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Plane Double-Layer Structure of AC@S Cathode Improves Electrochemical Performance for Lithium-Sulfur Battery

et al. 2018

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Due to the high theoretical specific capacity of lithium-sulfur batteries, it is considered the most promising electrochemical energy storage device for the next generation. However, the development of lithium-sulfur battery has been restricted by its low cycle efficiency and low capacity. We present a Plane double-layer structure of AC@S cathode to improve the electrochemical performance of lithium-sulfur batteries. The battery with this cathode showed good electrochemical performance. The initial discharge capacity of the battery with the structure of AC@S cathode could reach 1,166 mAhg−1 at 0.1 C. After 200 cycles, it still remains a reversible capacity of 793 mAh g−1 with a low fading rate of 0.16% per cycle. Furthermore, the batteries could hold a discharge capacity of 620 mAh g−1 after 200 cycles at a typical 0.5 C rate. The improvement of electrochemical performance is attributed to that the polysulfide produced during charge/discharge can be better concentrated in the cathode by the planar double-layer structure, thus reducing the loss of sulfur.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Plane Double-Layer Structure of AC@S Cathode Improves Electrochemical Performance for Lithium-Sulfur Battery

et al. 2018

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“…The initial discharge profiles of the Li-S batteries using IPA/AC modified separator, AC-coated separator and pristine separator at 0.2 C are exhibited in Figure 6A . It is found that each profiles consists of two typical discharge potential plateaus corresponding to the reduction from elemental sulfur to long-chain polysulfides at high voltages and from long-chain polysulfides to short-chain Li 2 S 2 /Li 2 S (Jianrong et al, 2014 ; Guo et al, 2017 ). However, there are distinctly differences in the height and length of the plateau.…”

Section: Resultsmentioning

confidence: 99%

High-Performance Lithium-Sulfur Batteries With an IPA/AC Modified Separator

Guo¹,

Jiang²,

Tao³

et al. 2018

Front. Chem.

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To inhibit the polysulfide-diffusion in lithium sulfur (Li-S) batteries and improve the electrochemical properties, the commercial polypropylene (PP) was decorated by an active carbon (AC) coating with lots of electronegative oxygenic functional group of –OH. Owing to the strong adsorption of AC and the electrostatic repulsion between the –OH and negatively charged polysulfide ions, the Li-S batteries demonstrated a high initial discharge capacity of 1,656 mAh g−1 (approximately 99% utilization of sulfur) and the capacity can still remain at 830 mAh g−1 after 100 cycles at 0.2 C. Moreover, when the rate was increased to 1 C, the batteries could also possess a discharge capacity of 1,143 mAh g−1. The encouraging cycling stability make clear that this facile approach can successfully restrain the shuttle effect of polysulfides and make further progress to the practical application of Li-S batteries.

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“…As a result, the cells incorporating this modified separator exhibited good rate performance, cycling stability, and large specific discharge capacity even with large areal loading of sulfur. Along similar lines, Guo et al coated one side of the commercial Celgard separator with a mixture of CNTs and active carbon with PVdF binder, while Tan et al used a slurry of porous carbon–MWCNTs with PVdF binder, and Wu et al coated the separators with a 3D graphene@CNT composite to be incorporated into Li‐S batteries to achieve improved electrochemical performance by intercepting polysulfide shuttle. Huang et al activated CNTs with KOH and, through vacuum filtration, coated a thin layer of it on a commercial Celgard 2400 separator to assemble Li‐S batteries .…”

Section: A Summary Of Recent Literature On Li‐s Battery Separators CLmentioning

confidence: 99%

Separator Membranes for Lithium–Sulfur Batteries: Design Principles, Structure, and Performance

Gupta

Sivaram

2019

Energy Tech

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Improvement in electrical energy storage systems is one of the most recent research topics of great academic and industrial interest. Lithium‐sulfur (Li‐S) battery systems offer a theoretical energy density an order of magnitude larger than the popular Li‐ion batteries. The principle of working, inherent challenges in utilizing this system for commercial applications, and the various approaches taken to address these challenges are herein discussed in detail. The polysulfide shuttle effect is a major concern that deteriorates electrochemical performance in this system. In the recent past, electrodes have been intricately engineered to tackle this problem. However, more recently, the focus has shifted to the critical role of the separator. Modifying conventional separators or fabricating novel structures to enhance the cell performance appears to be a more feasible option. Some design principles that are critical to the functioning of a separator in Li‐S batteries, namely physisorption, chemisorption, and electrostatic repulsion, are discussed. Many recent papers proposed novel cell configurations with specifically designed functional separators. These reports are classified according to three design principles, analyzed critically, and compared with a view to assess their relative merits and efficacy. Some thoughts on the future directions in the development of an efficient separator are described.

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Carbon nanotube doped active carbon coated separator for enhanced electrochemical performance of lithium–sulfur batteries

Cited by 19 publications

References 29 publications

Plane Double-Layer Structure of AC@S Cathode Improves Electrochemical Performance for Lithium-Sulfur Battery

Plane Double-Layer Structure of AC@S Cathode Improves Electrochemical Performance for Lithium-Sulfur Battery

High-Performance Lithium-Sulfur Batteries With an IPA/AC Modified Separator

Separator Membranes for Lithium–Sulfur Batteries: Design Principles, Structure, and Performance

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