A multi functional binder with lithium ion conductive polymer and polysulfide absorbents to improve cycleability of lithium–sulfur batteries

Li, Gaoran; Cai, Wenlong; Liu, Binhong; Li, Zhou Peng

doi:10.1016/j.jpowsour.2015.06.083

Cited by 98 publications

(61 citation statements)

References 40 publications

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“…Furthermore, after both as-prepared Li 2 S 4 electrodes were immersed in the electrolyte, the immersed Li 2 S 4 @mPBI film presented a much higher capacity than the immersed PVDF@Li 2 S 4 film, which again verifies that the mPBI binder is superior for PS adsorption and re-utilization. Sulfur electrodes were prepared by mixing the sulfur-carbon composite 27 with the mPBI or PVDF binder and denoted as S@mPBI and S@PVDF electrode, respectively. To evaluate the effectiveness of the physical and chemical functions of mPBI as the binder in Li-S batteries, galvanostatic charge-discharge tests were conducted.…”

Section: Results and Discussion Mpbi As Bindermentioning

confidence: 99%

“…27 Sulfur macroporous composite was prepared via thermal treatment of the ball-milled mixture of sulfur and macroporous carbon with a mass ratio of 7:3 at 155°C for 4 h in an N 2 atmosphere. The working electrode was fabricated by casting the slurry containing sulfur macroporous composite, super P and polymer binder in a weight ratio of 7:2:1 on an aluminum foil and vacuum drying at 60°C for 12 h. The sulfur loading on the electrode was controlled at 1 mg cm − 2 .…”

Section: Electrochemical Evaluationmentioning

confidence: 99%

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The dual actions of modified polybenzimidazole in taming the polysulfide shuttle for long-life lithium–sulfur batteries

Wang

Cai

et al. 2016

NPG Asia Mater

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The development of lithium-sulfur (Li-S) batteries is of practical significance to meet the rapidly escalating demand for advanced energy storage technologies with long life and high-energy density. However, the dissolution and shuttling of the intermediate polysulfides (PS) initiates the loss of active sulfur and the poisoning of the lithium anode, leading to unsatisfactory cyclability and consequently hinders the commercialization of Li-S batteries. Herein, we develop a facile strategy to tame the PS dissolution and the shuttling effect in the Li-S system by introducing a modified polybenzimidazole (mPBI) with multiple functions. As a binder, the excellent mechanical property of mPBI endows the sulfur electrode with strong integrity and, therefore, results in high sulfur loading (7.2 mg cm − 2 ), whereas the abundant chemical interaction between mPBI and PS affords efficient PS adsorption to inhibit sulfur loss and prolong battery life. As a functional agent for the separator, the mPBI builds a PS shield onto the separator to block PS's migration to further suppress the PS shuttling. The dual actions of mPBI confer an excellent performance of 750 mAh g − 1 (or 5.2 mAh cm − 2 ) after 500 cycles at C/5 on the Li-S battery with an ultralow capacity fading rate of 0.08% per cycle.

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Section: Results and Discussion Mpbi As Bindermentioning

confidence: 99%

Section: Electrochemical Evaluationmentioning

confidence: 99%

The dual actions of modified polybenzimidazole in taming the polysulfide shuttle for long-life lithium–sulfur batteries

Wang

Cai

et al. 2016

NPG Asia Mater

Self Cite

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“…Accordingly, there is significant current activity towards developing binder‐free electrode structures . However, there is also an increasing interest in identifying or developing new binder materials with properties that enable improved electrochemical performance through properties such as electronic conductivity or by interaction with polysulfides …”

Section: Introductionmentioning

confidence: 99%

A Robust, Water‐Based, Functional Binder Framework for High‐Energy Lithium–Sulfur Batteries

et al. 2017

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We report here a water-based functional binder framework for the lithium-sulfur battery systems, based on the general combination of a polyether and an amide-containing polymer. These binders are applied to positive electrodes optimised towards high-energy electrochemical performance based only on commercially available materials. Electrodes with up to 4 mAh cm capacity and 97-98 % coulombic efficiency are achievable in electrodes with a 65 % total sulfur content and a poly(ethylene oxide):poly(vinylpyrrolidone) (PEO:PVP) binder system. Exchange of either binder component for a different polymer with similar functionality preserves the high capacity and coulombic efficiency. The improvement in coulombic efficiency from the inclusion of the coordinating amide group was also observed in electrodes where pyrrolidone moieties were covalently grafted to the carbon black, indicating the role of this functionality in facilitating polysulfide adsorption to the electrode surface. The mechanical properties of the electrodes appear not to significantly influence sulfur utilisation or coulombic efficiency in the short term but rather determine retention of these properties over extended cycling. These results demonstrate the robustness of this very straightforward approach, as well as the considerable scope for designing binder materials with targeted properties.

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“…PVP has been widely used as the stabilizer or capping agent to protect nanoparticles (NPs) from aggregation or precipitation. [16][17][18][19][20] The wrapping of PVP on Sn NPs is expected to alleviate the volume changes, and prevent nanoparticle aggregation and pulverization.…”

Section: Introductionmentioning

confidence: 99%

Polyvinyl Pyrrolidone Wrapped Sn Nanoparticles/Carbon Xerogel Composite as Anode Material for High Performance Lithium Ion Batteries

Zhang

Yin

2016

Electrochimica Acta

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A multi functional binder with lithium ion conductive polymer and polysulfide absorbents to improve cycleability of lithium–sulfur batteries

Cited by 98 publications

References 40 publications

The dual actions of modified polybenzimidazole in taming the polysulfide shuttle for long-life lithium–sulfur batteries

The dual actions of modified polybenzimidazole in taming the polysulfide shuttle for long-life lithium–sulfur batteries

A Robust, Water‐Based, Functional Binder Framework for High‐Energy Lithium–Sulfur Batteries

Polyvinyl Pyrrolidone Wrapped Sn Nanoparticles/Carbon Xerogel Composite as Anode Material for High Performance Lithium Ion Batteries

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