Improving the capacity and cycling-stability of Lithium–sulfur batteries using self-healing binders containing dynamic disulfide bonds

Duan, Lijie; Kong, Weihua; Yan, Wen; Li, Chenghui; Zuo, Jing‐Lin

doi:10.1039/d0se00309c

“…Self‐healing ability, referring to the property that enables materials to automatically repair damage and restore to a normal state, has received extensive attention in various fields like biomedicine, soft robotics engineering or energy storage [32, 33] . Processing through the two‐step PHAP method, the obtained materials can combine the advantages of both functional polymers and MOFs together, which might exhibit self‐healing property.…”

Section: Resultsmentioning

confidence: 99%

Stepped Channels Integrated Lithium–Sulfur Separator via Photoinduced Multidimensional Fabrication of Metal–Organic Frameworks

Gao

¹

,

Wang

²

,

Wang

³

et al. 2021

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Multidimensional fabrication of metal-organic frameworks (MOFs) into multilevel channel integrated devices are in high demanded for Li-S separators.S uchs eparators have advantages in pore-engineering that might fulfill requirements such as intercepting the diffusing polysulfides and improving the Li + /electrolyte transfer in Li-S batteries.H owever,most reported works focus on the roles of MOFs as ionic sieves for polysulfides while offering limited investigation on the tuning of Li + transfer across the separators.Ap hotoinduced heat-assisted processing strategy is proposed to fabricate MOFs into multidimensional devices (e.g., hollow/ Janus fibers,d ouble-or triple-layer membranes). Fort he first time,at riple-layer separator with stepped-channels has been designed and demonstrated as ap owerful separator with outstanding specific capacity (1365.0 mAh g À1 )a nd cycling performance (0.03 %fading per cycle from 100 th to 700 th cycle), which is superior to single/double-layer and commercial separators.T he findings may expedite the development of MOF-based membranes and extend the scope of MOFs in energy-storage technologies.

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“…However, there have been relatively few reports with the respect to applying the same strategy to construct binders with catalytic ability. Duan et al . designed a self‐healing poly(dimethylsiloxane) polymer with dynamic disulfide bonds as the binder (denoted as 2S‐PDMS) for sulfur electrodes (Figure c).…”

Section: Ecofriendly Functional Bindersmentioning

confidence: 95%

Environmentally Friendly Binders for Lithium‐Sulfur Batteries

Jin

¹

,

Li

²

,

Qian

³

et al. 2020

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Lithium‐sulfur batteries (LSBs) have attracted the battery community's attention in recent years because of the ultra‐high theoretical specific capacity and energy density. To realize the commercial application of LSBs, issues including lithium polysulfide shuttle effects, insulating active materials, and large volume changes are urgently to be solved, especially LSBs with high sulfur loading suffering from more serious capacity fading. Developing environmentally friendly and multifunctional binders would not only overcome the problems existing in LSBs but could also satisfy the requirements for green materials. In this Review, we first conclude the required characteristics for binders in LSBs, then summarize the research progress of ecofriendly binders in detail, as well as outstanding binders applied in high‐sulfur‐loading electrodes. Finally, the challenges and development direction of binders for future industrial applications in LSBs are also highlighted.

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“…Self-healing ability,referring to the property that enables materials to automatically repair damage and restore to an ormal state,h as received extensive attention in various fields like biomedicine,s oft robotics engineering or energy storage. [32,33] Processing through the two-step PHAP method, the obtained materials can combine the advantages of both functional polymers and MOFs together,which might exhibit self-healing property.T ov erify it, as trip of UiO-66@SP hydrogel and NH 2 -UiO-66@SP hydrogel are cut in halves and then positioned to be connected together with each other. After placing in air at room temperature for 10 min, the separated two parts are reconnected as awhole (Figure S12).…”

Section: Angewandte Chemiementioning

confidence: 99%

Stepped Channels Integrated Lithium–Sulfur Separator via Photoinduced Multidimensional Fabrication of Metal–Organic Frameworks

Lan

¹

,

Gao

²

,

Wang

³

et al. 2021

Angewandte Chemie

10

0

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Multidimensional fabrication of metal-organic frameworks (MOFs) into multilevel channel integrated devices are in high demanded for Li-S separators.S uchs eparators have advantages in pore-engineering that might fulfill requirements such as intercepting the diffusing polysulfides and improving the Li + /electrolyte transfer in Li-S batteries.H owever,most reported works focus on the roles of MOFs as ionic sieves for polysulfides while offering limited investigation on the tuning of Li + transfer across the separators.Ap hotoinduced heat-assisted processing strategy is proposed to fabricate MOFs into multidimensional devices (e.g., hollow/ Janus fibers,d ouble-or triple-layer membranes). Fort he first time,at riple-layer separator with stepped-channels has been designed and demonstrated as ap owerful separator with outstanding specific capacity (1365.0 mAh g À1 )a nd cycling performance (0.03 %fading per cycle from 100 th to 700 th cycle), which is superior to single/double-layer and commercial separators.T he findings may expedite the development of MOF-based membranes and extend the scope of MOFs in energy-storage technologies.

show abstract

Improving the capacity and cycling-stability of Lithium–sulfur batteries using self-healing binders containing dynamic disulfide bonds

Abstract: A self-healing poly(dimethylsiloxane) polymer containing disulfide bonds is synthesized for application in lithium–sulfur batteries. The reversible breakage/formation of the disulfide bonds can capture polysulfides and accelerate their conversion.

Cited by 29 publications

References 56 publications

Stepped Channels Integrated Lithium–Sulfur Separator via Photoinduced Multidimensional Fabrication of Metal–Organic Frameworks

Stepped Channels Integrated Lithium–Sulfur Separator via Photoinduced Multidimensional Fabrication of Metal–Organic Frameworks

Environmentally Friendly Binders for Lithium‐Sulfur Batteries

Stepped Channels Integrated Lithium–Sulfur Separator via Photoinduced Multidimensional Fabrication of Metal–Organic Frameworks

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