Controllable embedding of sulfur in high surface area nitrogen doped three dimensional reduced graphene oxide by solution drop impregnation method for high performance lithium-sulfur batteries

Zegeye, Tilahun Awoke; Tsai, Meng‐Che; Cheng, Ju‐Hsiang; Lin, Ming‐Hsien; Chen, Hung-Ming; Rick, John; Su, Wei‐Nien; Kuo, Chung‐Feng Jeffrey; Hwang, Bing‐Joe

doi:10.1016/j.jpowsour.2017.03.063

Cited by 73 publications

(47 citation statements)

References 72 publications

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“…After 100 cycles, the capacity delivered by this cell was higher (600 mAh g ─1 at a rate of 0.06 C). This improved performance is attributed to the deposition S method, and is consistent with other reports [51,52], in which methods for in situ S deposition, such as the dissolution of S in CS 2 or thiosulphate in an acid medium, give better performance than those which use commercial S followed by grinding or melt diffusion. The long-term cycling stability of the electrode was also tested at higher rates of 0.5 and 1 C after being activated at C/16 for two cycles.…”

Section: Figuresupporting

confidence: 90%

Biomass-derived carbon/γ-MnO2 nanorods/S composites prepared by facile procedures with improved performance for Li/S batteries

Luna‐Lama

Hernández-Rentero

Caballero

et al. 2018

Electrochimica Acta

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The promising prospects of the Li/S battery, due to its theoretical energy density of about 2500 Wh kg ─1 , are severely limited by two main weaknesses: the poor conductivity of S and the solubility of the polysulphides in the electrolyte. A combination of carbon and transition metal oxides is the best option for mitigating both of these shortcomings simultaneously. In this work, we use hydrothermally-tailored γ-MnO 2 nanorods combined with an activated biomass-derived carbon, which is an inexpensive material and easy to prepare. This strategy was also followed for a AC/MnO 2 /S composite, a preparation of which was made by grinding; this is the simplest method for practical applications. More complex procedures for the formation of in situ hydrothermal MnO 2 nanorods gave similar results to those obtained from grinding. Compared with the AC/S composite, the presence of MnO 2 markedly increased the delivered capacity and improved the cycling stability at both low (0.1 C) and high (1 C) currents. This behaviour results from a combination of two main effects: firstly, the MnO 2 nanorods increase the electrical conductivity of the electrode, and secondly, the small particle size of the oxide can enhance the chemisorption properties and facilitate a redox reaction with polysulphides, more efficiently blocking their dissolution in the electrolyte.

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Section: Figuresupporting

confidence: 90%

Biomass-derived carbon/γ-MnO2 nanorods/S composites prepared by facile procedures with improved performance for Li/S batteries

Luna‐Lama

Hernández-Rentero

Caballero

et al. 2018

Electrochimica Acta

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“…Among carbon materials, graphene, a two‐dimensional (2D) honeycomb sp 2 carbon lattice, is served as one promising host for wrapping or anchoring sulfur to fabricate excellent carbon/sulfur composite cathodes for LSBs . It can sever as an effective interlayer between cathode material with separator, fabricate the hybrid system as cathode materials, combine with heteroatom as electrode materials, and so on for emerging energy storage devices.…”

Section: Graphenementioning

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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“…approaching 100% within the C/5 -C/2 current range, a capacity retention higher than 95%, and an excellent rate capability with maximum capacity of 1400 mAh gS −1 . Such an electrochemical performance, which is characteristic of batteries based on N-doped graphene synthesized from GO [67][68][69][70][71][72][73][74][75][76][77], is enhanced in this work by further improving the electrode structure and morphology as well as by adopting the DEGDME-LiTFSI-LiNO3 electrolyte. Accordingly, the calculated energy density for the Li/DEGDME-LiTFSI-LiNO3/3DNG-S battery approaches to 3000 Wh kg −1 with respect to the sulfur mass, which may lead to a practical energy density at C/2 rate of about 700 Wh kg −1 , estimated considering a correction factor of 1/3 that takes into account the contribution of anode, electrolyte and inactive components of typical cells [78].…”

Section: Further Information On Structure and Composition Of 3dng Is mentioning

confidence: 99%

Lithium sulfur battery exploiting material design and electrolyte chemistry: 3D graphene framework and diglyme solution

Benítez

Lecce

Caballero

et al. 2018

Journal of Power Sources

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Herein we investigate a lithium sulfur battery suitably combining alternative cathode design and relatively safe, highly conducting electrolyte. The composite cathode is formed by infiltrating sulfur in a N-doped 3D graphene framework prepared by a microwave assisted solvothermal approach, while the electrolyte is obtained by dissolving lithium bis(trifluoromethane)sulfonimide (LiTFSI) in diethylene glycol dimethyl ether (DEGDME), and upgraded by addition of lithium nitrate (LiNO3) as a film forming agent.The particular structure of the composite cathode, studied in this work by employing various techniques, well enhances the lithium-sulfur electrochemical process leading to very stable cycling trend and specific capacity ranging from 1000 mAh g −1 at the highest 2 rate to 1400 mAh g −1 at the lowest one. The low resistance of the electrode/electrolyte interphase, driven by an enhanced electrode design and a suitable electrolyte, is considered one of the main reasons for the high performance which may be of interest for achieving a promising lithium-sulfur battery. Furthermore, the study reveals a key bonus of the cell represented by the low flammability of the diglyme electrolyte, while comparable conductivity and interface resistance, with respect to the most conventional solution used for the lithium sulfur cell.

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Controllable embedding of sulfur in high surface area nitrogen doped three dimensional reduced graphene oxide by solution drop impregnation method for high performance lithium-sulfur batteries

Cited by 73 publications

References 72 publications

Biomass-derived carbon/γ-MnO2 nanorods/S composites prepared by facile procedures with improved performance for Li/S batteries

Biomass-derived carbon/γ-MnO2 nanorods/S composites prepared by facile procedures with improved performance for Li/S batteries

Review of Carbon Materials for Lithium‐Sulfur Batteries

Lithium sulfur battery exploiting material design and electrolyte chemistry: 3D graphene framework and diglyme solution

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