Effective strategies for stabilizing sulfur for advanced lithium–sulfur batteries

Ogoke, Ogechi; Wu, Gang; Wang, Xianliang; Casimir, Anix; Ma, Lu; Wu, Tianpin; Lü, Jun

doi:10.1039/c6ta07864h

Cited by 150 publications

(75 citation statements)

References 125 publications

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“…Particularly, a crucial characteristic of LSBs is that S 8 molecules can bind two Li atoms per S atom [S 8 +16Li↔8Li 2 S] . Thus, compared to other cathode materials, the energy density and electrochemical performance of sulfur electrode can be significantly improved . In addition, sulfur is cheap, non‐toxicity, naturally abundant, and environmentally benign …”

Section: Introductionmentioning

confidence: 99%

Review of Carbon Materials for Lithium‐Sulfur Batteries

et al. 2018

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Lithium‐sulfur battery as one of the most promising and attractive candidate among the emerging electrical energy storage has attracted enormous attentions. It has superior characteristics of high specific energy density (2600 Wh kg−1) and high theoretical specific capacity (1675 mAh g−1), which is equal to 3–5 times of lithium‐ion batteries, and more closed to the requirement of the pure electric vehicles and hybrid electric vehicles. Furthermore, sulfur element is inexpensive, naturally abundant, and environmentally friendly. However, the commercial application of lithium‐sulfur batteries (LSBs) still faces some major technical obstacles such as the low electrical conductivity of sulfur, the shuttle effect of polysulfides, and the drastic volume expansion during charge/discharge process. In this review paper, we focus on some of the effective strategies in boosting the electrochemical performance of LSBs through the development of sulfur/carbon composite electrode materials, including the use of porous carbons, carbon nanotubes/fibers, and graphene. The integration of carbon materials and sulfur can efficiently improve the utilization of active materials, enhance the conductivity of cathode materials, and provide a polysulfides barrier. Simultaneously, the challenges and prospects on LSBs in the near future are also presented and discussed.

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Section: Introductionmentioning

confidence: 99%

Review of Carbon Materials for Lithium‐Sulfur Batteries

et al. 2018

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“…Directed by the same research group, trace amounts of water (25-50 ppm) were also found to play a similar role as Cs + and were introduced as electrolyte additives to control the morphology [344]. They found that the trace amount of HF formed from the side reactions of LiPF 6 and H 2 O can facilitate the formation of uniform and dense LiF-rich SEI layers on the substrate. Such LiFrich SEI layers aid the uniform distribution of the electric field and thus lead to Li nanorod arrays aligned vertically to the substrate.…”

Section: Morphology Controlmentioning

confidence: 98%

“…Unfortunately, state-of-theart LIBs based on insertion-type transition metals/metal oxides cannot deliver enough energy density to meet the increasing demands of long-range electric vehicles [2][3][4]. Hence, it is of significance to search for new electrode materials which possess low molecular/atomic weight and are capable of multi-ion/-electron transfers per molecule/ atom [3,[5][6][7][8][9][10]. As one of the most abundant elements in the earth's crust, sulfur possesses a relatively low atomic weight of 32 g mol −1 and is a cost-effective and environmental friendly alternative to tradition LIBs.…”

Section: Introductionmentioning

confidence: 99%

Structural Design of Lithium–Sulfur Batteries: From Fundamental Research to Practical Application

Yang

Adair

et al. 2018

Electrochem. Energ. Rev.

327

206

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Lithium-sulfur (Li-S) batteries have been considered as one of the most promising energy storage devices that have the potential to deliver energy densities that supersede that of state-of-the-art lithium ion batteries. Due to their high theoretical energy density and cost-effectiveness, Li-S batteries have received great attention and have made great progress in the last few years. However, the insurmountable gap between fundamental research and practical application is still a major stumbling block that has hindered the commercialization of Li-S batteries. This review provides insight from an engineering point of view to discuss the reasonable structural design and parameters for the application of Li-S batteries. Firstly, a systematic analysis of various parameters (sulfur loading, electrolyte/sulfur (E/S) ratio, discharge capacity, discharge voltage, Li excess percentage, sulfur content, etc.) that influence the gravimetric energy density, volumetric energy density and cost is investigated. Through comparing and analyzing the statistical information collected from recent Li-S publications to find the shortcomings of Li-S technology, we supply potential strategies aimed at addressing the major issues that are still needed to be overcome. Finally, potential future directions and prospects in the engineering of Li-S batteries are discussed.

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“…However, the insulating nature of sulfur and the dissolution of lithium polysulfides in organic electrolytes limit the practical application of Li–S batteries . Therefore, to solve the above problems, previous studies of Li–S batteries focused on developing advanced host materials for sulfur, including carbon nanotubes, graphene, porous carbon, metal oxides, covalent organic framework (COFs), metal–organic frameworks (MOFs), polymers, and others . Although significant improvements in discharge capacity and long‐cycling performance of Li–S batteries have been achieved, the complex preparation and the high cost of these host materials remain a challenge…”

Section: Introductionmentioning

confidence: 99%

Trapping of Polysulfides with Sulfur‐Rich Poly Ionic Liquid Cathode Materials for Ultralong‐Life Lithium–Sulfur Batteries

Liu

Zeng

et al. 2020

ChemSusChem

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Sulfur‐rich polymers synthesized by inverse vulcanization are promising cathodes for Li–S batteries and can suppress the shuttle effect to improve the cycling properties of Li–S batteries. However, developing a sulfur‐rich copolymer with new chemical functionality to enhance performance of Li–S batteries remains a huge challenge. In this report, a sulfur‐rich polymer cathode containing ionic liquid segments named poly(sulfur‐co‐1‐vinyl‐3‐allylimidazolium bromide) [poly(S‐co‐DVIMBr)] was obtained by the inverse vulcanization of S8 with DVIMBr and used as cathode for the first time. This sulfur‐rich poly ionic liquid cathode showed effective suppression of the shuttle effect through joint effects of the stable chemical bonding of C−S and strong cation absorption for lithium polysulfides, which was confirmed by DFT calculations. In particular, the Li–S cell with poly(S‐co‐DVIMBr) cathode delivered high capacity retention of 90.22 % even over 900 cycles. Developing sulfur‐rich poly ionic liquids may provide a new strategy of introducing the functional groups with cations into the cathode materials for suppressing the shuttle effect and improving the performance of Li–S batteries.

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Effective strategies for stabilizing sulfur for advanced lithium–sulfur batteries

Abstract: This review focuses on recent developments in the last three years of various sulfur integration methods in lithium-sulfur batteries.

Cited by 150 publications

References 125 publications

Review of Carbon Materials for Lithium‐Sulfur Batteries

Review of Carbon Materials for Lithium‐Sulfur Batteries

Structural Design of Lithium–Sulfur Batteries: From Fundamental Research to Practical Application

Trapping of Polysulfides with Sulfur‐Rich Poly Ionic Liquid Cathode Materials for Ultralong‐Life Lithium–Sulfur Batteries

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