Effect of carbon coating on electrochemical performance of hard carbons as anode materials for lithium-ion batteries

Lee, Jong-Hyuk; Lee, Heon-Young; Oh, Seh-Min; Lee, Seo-Jae; Lee, Ki-Young; Lee, Sung-Man

doi:10.1016/j.jpowsour.2006.12.078

Cited by 49 publications

(19 citation statements)

References 22 publications

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“…To successfully operate a Li-S battery, various strategies were developed, mainly in exploration of electrode coatings, 16 inorganic additives, 17 conductive additives and multifunctional binders, 18 as well as optimizing the organic electrolytes etc.…”

Section: -15mentioning

confidence: 99%

Facile synthesis of a interleaved expanded graphite-embedded sulphur nanocomposite as cathode of Li–S batteries with excellent lithium storage performance

et al. 2012

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This paper reports the facile synthesis of a unique interleaved expanded graphite-embedded sulphur nanocomposite (S-EG) by melt-diffusion strategy. The SEM images of the S-EG materials indicate the nanocomposites consist of nanosheets with a layer-by-layer structure. Electrochemical tests reveal that the nanocomposite with a sulphur content of 60% (0.6S-EG) can deliver the highest discharge capacity of 1210.4 mAh g À1 at a charge-discharge rate of 280 mA g À1 in the first cycle, the discharge capacity of the 0.6S-EG remains as high as 957.9 mAh g À1 after 50 cycles of charge-discharge. Furthermore, at a much higher charge-discharge rate of 28 A g À1 , the 0.6S-EG cathode can still deliver a high reversible capacity of 337.5 mAh g À1 . The high sulphur utilization, excellent rate capability and reduced overdischarge phenomenon of the 0.6S-EG material are exclusively attributed to the particular microstructure and composition of the cathode.

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Section: -15mentioning

confidence: 99%

Facile synthesis of a interleaved expanded graphite-embedded sulphur nanocomposite as cathode of Li–S batteries with excellent lithium storage performance

et al. 2012

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“…low utilization and rapid capacity decay of the pure sulfur due to three factors: (1) the inherently poor electrical conductivity of sulfur (5 × 10 -30 S/cm at 25 °C ) [4,5]; (2) significant structure and volumetric changes during the charge/discharge process [6]; (3) polysulphides readily dissolve in the organic electrolyte, shuttle to the anode and then react with lithium during the charging process, resulting in deposition of insulating Li 2 S 2 /Li 2 S at the electrode interface and causing electrical and ionic mass transfer blockages [4,5]. Therefore, a variety of strategies including electrolyte development [7], anode modifications [8], inserting an interlayer [9], and cathode synthesis [10][11][12], have been intensively investigated in order to address the above issues in the charge/discharge processes. In particular, sulfur-micro/mesoporous carbon (S−MPC) composites have been regarded as one of the most promising Li−S cathodes [4][5][6][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Microporous bamboo biochar for lithium-sulfur batteries

et al. 2014

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Being simple, inexpensive, scalable and environmentally friendly, microporous biomass biochars have been attracting enthusiastic attention for application in lithium-sulfur (Li-S) batteries. Herein, porous bamboo biochar is activated via a KOH/annealing process that creates a microporous structure, boosts surface area and enhances electronic conductivity. The treated sample is used to encapsulate sulfur to prepare a microporous bamboo carbon-sulfur (BC-S) nanocomposite for use as the cathode for Li-S batteries for the first time. The BC-S nanocomposite with 50 wt.% sulfur content delivers a high initial capacity of 1,295 mA·h/g at a low discharge rate of 160 mA/g and high capacity retention of 550 mA·h/g after 150 cycles at a high discharge rate of 800 mA/g with excellent coulombic efficiency (≥95%). This suggests that the BC-S nanocomposite could be a promising cathode material for Li-S batteries.

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“…Recycling this low-cost waste into a promising active material for energy storage could be of great benefit to both the environmental issues and the energy challenges, and help to achieve green and sustainable energy development. Several previous works based on CTP have been devoted to its applications in LIBs and supercapacitors [30][31][32]. Previous works, however, only focused on activated carbon materials, which showed slightly lower capacity than the already commercialized carbon.…”

Section: Introductionmentioning

confidence: 99%

Nanocomposites of silicon and carbon derived from coal tar pitch: Cheap anode materials for lithium-ion batteries with long cycle life and enhanced capacity

Wang

Chou

Kim

et al. 2013

Electrochimica Acta

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Dou, S. Xue. (2013). Nanocomposites of silicon and carbon derived from coal tar pitch: Cheap anode materials for lithium-ion batteries with long cycle life and enhanced capacity. Electrochimica Acta, 93 (March), 213-221.Nanocomposites of silicon and carbon derived from coal tar pitch: Cheap anode materials for lithium-ion batteries with long cycle life and enhanced capacity AbstractFrom energy and environmental consideration, an industrial waste product, coal tar pitch (CTP), is used as the carbon source for Si/AC composite. We exploited a facile sintering method to largely scale up Si/ amorphous carbon nanocomposite. The composites with 20 wt.% silicon with PVdF binder exhibited stable lithium storage ability for prolonged cycling. The composite anode delivered a capacity of 400.3 mAh g−1 with a high capacity retention of 71.3% after 1000 cycles. Various methods are used to investigate the reason for the outstanding cyclability. The results indicate that the silicon nanoparticles are wrapped by amorphous SiOx and AC in Si/AC composite. This uniform structure is very favorable to lithium storage, the SiOx and AC layers can supply sufficient conductivity and strong elasticity to suppress the stress resulting from the reaction of Si with Li during charge/discharge process.

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Effect of carbon coating on electrochemical performance of hard carbons as anode materials for lithium-ion batteries

Cited by 49 publications

References 22 publications

Facile synthesis of a interleaved expanded graphite-embedded sulphur nanocomposite as cathode of Li–S batteries with excellent lithium storage performance

Facile synthesis of a interleaved expanded graphite-embedded sulphur nanocomposite as cathode of Li–S batteries with excellent lithium storage performance

Microporous bamboo biochar for lithium-sulfur batteries

Nanocomposites of silicon and carbon derived from coal tar pitch: Cheap anode materials for lithium-ion batteries with long cycle life and enhanced capacity

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