Enhanced cycle performance of Li–S battery with a polypyrrole functional interlayer

Ma, Guoqiang; Zhang, Wen; Jin, Jun; Wu, Mingmei; Wu, Xiaofeng; Zhang, Jingchao

doi:10.1016/j.jpowsour.2014.05.057

Cited by 132 publications

(87 citation statements)

References 29 publications

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“…The reduced charge transfer resistance is probably because the conductive carbon coating on the separator surface provides a conductive pathway, facilitating the charge transfer for surface reactions, and thus reduces the charge transfer resistance [35,39]. Moreover, the charge transfer resistance remarkably decreases for the cell with CGF, indicating a weaker polarization for the Li-S cell with the addition of carbon coating layer [40]. Figure S3a) [41].…”

Section: Resultsmentioning

confidence: 99%

A novel separator coated by carbon for achieving exceptional high performance lithium-sulfur batteries

et al. 2016

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Section: Resultsmentioning

confidence: 99%

A novel separator coated by carbon for achieving exceptional high performance lithium-sulfur batteries

et al. 2016

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“…[96][97][98][99][100][101][102] Particularly, the insertion of an interlayer between the S cathode and the separator has been extensively explored. [103][104][105][106][107][108][109] Manthiram and co-workers investigated a variety of carbon, including an eggshell membrane, [ 105 ] a microporous carbon paper, [ 104 ] a carbonized leaf, [ 106 ] a carboncoated separator, [ 110 ] a carbon nanotube-coated separator, [ 107 ] and a treated carbon paper [ 108 ] based interlayer as a barrier to block the polysulfi de shuttle.…”

Section: Formation Of a Passivation Layer On A LI Surfacementioning

confidence: 99%

Anodes for Rechargeable Lithium‐Sulfur Batteries

Cao

et al. 2015

Advanced Energy Materials

464

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this makes it one of the most promising candidates to meet the energy needs for powering future EVs. [ 6,[19][20][21][22][23][24][25][26] Research on Li-S batteries began in the early 1960s. [ 24,27 ] In the following fi ve decades, only limited progress was made based on sporadic research efforts in this fi eld. Recently, in the light of nanoporous carbon materials, the cell performance was greatly improved and the research passion on Li-S batteries has been revived. [ 20,28,29 ] Unlike Li-ion batteries that use Li + -ion insertion chemistry in intercalation inorganic compounds for both cathode and anode, Li-S batteries are based on a conversion reaction of S forming Li 2 S via polysulfi des as intermediate species (Li 2 S n , n = 4-8), which could deliver a high specifi c capacity of 1672 mAh g −1 . [ 20,24 ] However, to realize commercial Li-S batteries, there are still many technical challenges to be solved from cathode to anode, as well as electrolyte. [ 22,30,31 ] The performances of different components in Li-S batteries are often related to each other. For example, the improvements in S based cathode could benefi t from reduced degradation in metallic Li anode by minimizing polysulfi de migration and shuttle effect. In general, Li-S batteries suffer from low S utilization and short cycle life, which originate from poor conductivity of sulfur and its discharged product Li 2 S, self-discharge, large volume expansion (≈80%) upon the formation of Li 2 S, and the dissolution of polysulfi des in liquid electrolytes. [ 24,32,33 ] The insulating nature of S and the large volume expansion of S cathode upon discharge can be largely overcome via forming nanocomposite with highly porous carbon materials, which could greatly improve the S utilization and rate performance. [ 21,25,32,34 ] In addition, the porous cathode structure could hold the formed polysulfi des in the pores so as to reduce the degree of dissolution of polysulfi des into the electrolyte. Recently, it was also found that the synthesis of metastable small S molecules of S 2-4 confi ned in a conductive microporous carbon matrix could avoid the unfavorable formation of long chain polysulfi des, thus avoiding the S dissolution problem. [35][36][37] Although signifi cant improvements have been made in the cyclability of S/C composite cathodes, [ 21,24,28,38 ] there are still many problems involved in Li-S batteries before this technology can be adopted for practical applications. In contrast to the enormous research efforts on S cathode side, the Li metal anode in Li-S batteries, which is directly involved in the shuttle mechanism and the capacity failure, has attracted much less attention. [ 24,39 ] Recently, with the signifi cant improvements in the development of high capacity S cathodes using stable C/S composites, the research spotlight is falling on the anode side With the signifi cant progress that has been made toward the development of cathode materials and electrolytes in lithium-sulfur (Li-S) batteries in recent years, the stability of the anod...

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“…[27][28] In addition, a large amount of heat will be released when the Li metal reacts with the electrolytes, which can pose risks of overheating. 29 Many in-situ/ex-situ attempts, such as reactive organic/inorganic additives, [30][31][32] Li alloy, [33][34] polymer coatings, [35][36] sputtered solid electrolytes, 37 have been applied to passivate Li metal. Some alternative nanostructured Li anodes such as 3D skeleton-based Li anode, 38 graphene framework-based Li anode 39 as well as Li 7 B 6 framework-based Li anode, [40][41] have also been used, which can effectively prohibit the Li dendrite formation and extend the lifespan of Li-metal anodes.…”

Section: Introductionmentioning

confidence: 99%

Trimethylsilyl Chloride-Modified Li Anode for Enhanced Performance of Li–S Cells

Zhang

Jin

et al. 2016

ACS Appl. Mater. Interfaces

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A facile and effective method to modify Li anode for Li-S cells by exposing Li foils to tetrahydrofuran (THF) solvent, oxygen atmosphere and trimethylsilyl chloride ((CH3)3SiCl) liquid in sequence is proposed. The results of SEM and XPS show the formation of a homogeneous and dense film with a thickness of 84 nm on Li metal surface. AC impedance and polarization test results show the improved interfacial stability. The interfacial resistances as well as polarization potential difference have obviously decreased as compared with that of a pristine Li anode. CV and charge-discharge test results demonstrate that more reversible discharge capacity and higher Coulombic efficiency can be achieved. Specific capacity of 760 mAh g(-1) and an average Coulombic efficiency of 98% are retained after 100 cycles at 0.5C without LiNO3 additive. Additionally, the Li-S cell with a modified Li anode displays a greatly improved rate performance with ∼425 mAh g(-1) at 5C, making it more attractive and competitive in the applications of high-power supply.

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Enhanced cycle performance of Li–S battery with a polypyrrole functional interlayer

Cited by 132 publications

References 29 publications

A novel separator coated by carbon for achieving exceptional high performance lithium-sulfur batteries

A novel separator coated by carbon for achieving exceptional high performance lithium-sulfur batteries

Anodes for Rechargeable Lithium‐Sulfur Batteries

Trimethylsilyl Chloride-Modified Li Anode for Enhanced Performance of Li–S Cells

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