Sulfur–mesoporous carbon composites in conjunction with a novel ionic liquid electrolyte for lithium rechargeable batteries

Wang, Jiazhao; Chew, Sau Yen; Zhao, Zhengwei; Ashraf, Syed A.; Wexler, David; Chen, J.; Ng, See How; Chou, Shulei; Liu, Huan

doi:10.1016/j.carbon.2007.11.007

Cited by 365 publications

(219 citation statements)

References 24 publications

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“…To overcome the above-mentioned obstacles, carbon based materials with various hierarchical structures, including meso-/micro-porous carbons [6][7][8][9][10][11] , hollow carbon spheres [12][13][14] , carbon nanotubes/nanofibers [15][16][17][18][19] , graphene derivatives [20][21][22][23][24][25][26][27][28][29][30] , and flexible carbon membranes 31 6 C with a low decay rate of 0.039% per cycle over 1500 cycles) 25 , a sulfur-graphene composite with ~ 63.6 wt% sulfur uniformly coated on graphene through reduction of GO and concomitant sulfurization (440 mAh g -1 after 500 cycles at 0.75 C) 22 , and polyvinylpyrrolidone (PVP)-encapsulated hollow S nanospheres (i.e., S@PVP nanospheres) from the reaction of Na2S2O3 and…”

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confidence: 99%

Sulfur–Graphene Nanostructured Cathodes via Ball-Milling for High-Performance Lithium–Sulfur Batteries

et al. 2014

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Although much progress has been made to develop high-performance lithium-sulfur batteries (LSBs), the reported physical or chemical routes to sulfur cathode materials are often multistep/complex and even involve environmentally hazardous reagents, and hence are infeasible for mass production. Here, we report a simple ball-milling technique to combine both the physical and chemical routes into a one-step process for low-cost, scalable, and eco-friendly production of graphene nanoplatelets (GnPs) edge-functionalized with sulfur (SGnPs) as highly efficient LSB cathode materials of practical significance. LSBs based on the S-GnP cathode materials, produced by ball-milling 70 wt % sulfur and 30 wt % graphite, delivered a high initial reversible capacity of 1265.3 mAh g-1 at 0.1 C in the voltage range of 1.5-3.0 V with an excellent rate capability, followed by a high reversible capacity of 966.1 mAh g-1 at 2 C with a low capacity decay rate of 0.099% per cycle over 500 cycles, outperformed the current state-of-the-art cathode materials for LSBs. The observed excellent electrochemical performance can be attributed to a 3D "sandwich-like" structure of S-GnPs with an enhanced ionic conductivity and lithium insertion/extraction capacity during the discharge-charge process. Furthermore, a low-cost porous carbon paper pyrolyzed from common filter paper was inserted between the 0.7S-0.3GnP electrode and porous polypropylene film separator to reduce/eliminate the dissolution of physically adsorbed polysulfide into the electrolyte and subsequent cross-deposition on the anode, leading to further improved capacity and cycling stability.

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confidence: 99%

Sulfur–Graphene Nanostructured Cathodes via Ball-Milling for High-Performance Lithium–Sulfur Batteries

et al. 2014

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“…Thus, a few studies on Li/S cells with RTIL electrolytes have been reported [41,[114][115][116][117][118]. The effect of incorporating RTIL based on 1-ethyl-3-methylimidazolium bis(perfluoroethylsulfonyl)imide (EMImTFSI) or 1-butyl-3-methylimidazolium hexafluorophosphate (BMImPF 6 ), as an additive in liquid electrolyte (0.5 M LiCF 3 SO 3 or 0.5 M LiPF 6 in DME/DOL solvent) was investigated by Kim et al [41].…”

Section: Liquid Electrolytesmentioning

confidence: 99%

Lithium/Sulfur Secondary Batteries: A Review

Zhao

Cheruvally

Kim

et al. 2016

Journal of Electrochemical Science and Technology

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Lithium batteries based on elemental sulfur as the cathode-active material capture great attraction due to the high theoretical capacity, easy availability, low cost and non-toxicity of sulfur. Although lithium/sulfur (Li/S) primary cells were known much earlier, the interest in developing Li/S secondary batteries that can deliver high energy and high power was actively pursued since early 1990's. A lot of technical challenges including the low conductivity of sulfur, dissolution of sulfurreduction products in the electrolyte leading to their migration away from the cathode, and deposition of solid reaction products on cathode matrix had to be tackled to realize a high and stable performance from rechargeable Li/S cells. This article presents briefly an overview of the studies pertaining to the different aspects of Li/S batteries including those that deal with the sulfur electrode, electrolytes, lithium anode and configuration of the batteries.

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“…The same group also demonstrated the anionic effect as solvate ionic liquid electrolytes in rechargeable Li-S batteries . Wang et al (2008) compared the cycling profile of Li/S cells consisting of 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl) imide and lithium bistrifluoromethanesulfonylimide with a sulfur coated carbon cathode. The cell delivered higher discharge capacity with ionic liquid than the conventional organic solvent electrolyte.…”

Section: Ionic Liquids As Electrolytesmentioning

confidence: 99%

Efficient Electrolytes for Lithiumâ€“Sulfur Batteries

Angulakshmi

Stephan

2015

Front. Energy Res.

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This review article mainly encompasses on the state-of-the-art electrolytes for lithiumsulfur batteries. Different strategies have been employed to address the issues of lithiumsulfur batteries across the world. One among them is identification of electrolytes and optimization of their properties for the applications in lithium-sulfur batteries. The electrolytes for lithium-sulfur batteries are broadly classified as (i) non-aqueous liquid electrolytes, (ii) ionic liquids, (iii) solid polymer, and (iv) glass-ceramic electrolytes. This article presents the properties, advantages, and limitations of each type of electrolytes. Also, the importance of electrolyte additives on the electrochemical performance of Li-S cells is discussed.

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Sulfur–mesoporous carbon composites in conjunction with a novel ionic liquid electrolyte for lithium rechargeable batteries

Cited by 365 publications

References 24 publications

Sulfur–Graphene Nanostructured Cathodes via Ball-Milling for High-Performance Lithium–Sulfur Batteries

Sulfur–Graphene Nanostructured Cathodes via Ball-Milling for High-Performance Lithium–Sulfur Batteries

Lithium/Sulfur Secondary Batteries: A Review

Efficient Electrolytes for Lithiumâ€“Sulfur Batteries

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