Fabrication of conductive polymer-coated sulfur composite cathode materials based on layer-by-layer assembly for rechargeable lithium–sulfur batteries

Li, Duan; Lu, Jiachun; Liu, Wenyuan; Huang, Ping; Wu-shang, Wang; Liu, Zhichao

doi:10.1016/j.colsurfa.2012.08.033

Cited by 49 publications

(31 citation statements)

References 43 publications

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“…3 Various methods have been explored to address the above mentioned issue, including addition of various types of conductive carbon materials [4][5][6][7][8][9] and conductive polymers. [10][11][12][13] Notably, the dispersion of multiwalled carbon nanotube (MWNT) with sulfur has been proven to be an effective and facile method to reinforce the electric conductivity of the cathode and prevent dissolution of lithium polysulfides into the electrolytes. 4,11 However, it is known that MWNT has hydrophobic characteristic and cannot be dispersed into sulfur electrode homogeneously, and the cycle performance of a sulfur cathode with simple MWNT addition still remains insufficient for the practical applications.…”

Section: ¹1mentioning

confidence: 99%

Synthesis of Multiwalled Carbon Nanotube Aqueous Suspension with Surfactant Sodium Dodecylbenzene Sulfonate for Lithium/Sulfur Rechargeable Batteries

et al. 2016

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Due to the hydrophobic nature of multiwalled carbon nanotube (MWNT), sodium dodecylbenzene sulfonate (SDBS) was adopted as a surfactant to synthesize a well-dispersed, homogeneous MWNT aqueous suspension. By simple stirring mixing of the resultant MWNT suspension with nano-sulfur aqueous suspension, a novel porous sulfur/ multiwalled carbon nanotube composite (S/MWNT) was synthesized. This preparation method based on the suspension mixing possesses the advantages of simplicity and low cost. Homogeneous dispersion and integration of MWNT in the composite results in a porous, highly conductive and mechanically flexible framework with enhanced electronic conductivity and ability to absorb the polysulfides into its porous structure. The cell with this S/MWNT composite cathode demonstrates a high reversibility, resulting in a stable reversible specific discharge capacity of 708 mAh g −1 after 100 cycles at 0.1 C. Furthermore, the S/MWNT composite cathode with sulfur content of 62.5 wt% exhibits a good rate capability with discharge capacities of 946, 780 and 516 mAh g −1 at 0.5, 1 and 1.5 C, respectively.

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Section: ¹1mentioning

confidence: 99%

Synthesis of Multiwalled Carbon Nanotube Aqueous Suspension with Surfactant Sodium Dodecylbenzene Sulfonate for Lithium/Sulfur Rechargeable Batteries

et al. 2016

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“…2 Owing to a combination of attractive properties possessed by ICPs, they are increasingly being considered for use in a variety of applications including rechargeable batteries, 3,4,[9][10][11] supercapacitors, 2,5-8 solar cells, [12][13][14] sensors 15,16 and anticorrosiveantistatic coatings. 17 Properties of ICPs can be further enhanced by making them into composites 18,19 and/or using a variety of fillers. 20 Two important attributes of polymer electrodes used in charge storage devices are, its energy density and power density.…”

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confidence: 99%

Estimation of Equilibrium Capacitance of Polyaniline Films Using Step Voltammetry

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Juvekar

2015

J. Electrochem. Soc.

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The equilibrium charge storage characteristic of polyaniline films has been determined using step voltammetry technique. The step coulogram (plot of charge stored versus potential) consists of five distinct regions, which correspond to the different energy bands exhibited by the film, in keeping with Raman and ESR spectroscopy data. The coulogram is piecewise linear, with constant capacitance in each band. Effect of the type and concentration of the acid on the equilibrium capacitances of the bands has been studied. The polaron band has the highest capacitance, followed by the bipolaron band and then the polaron lattice band. The charge stored at a given potential is found to be proportional to film mass. The film needs to be polarized to a threshold charge before faradaic charging begins. This faradaic threshold is independent of the type and concentration of the acids. The step coulogram is compared with the sweep coulogram obtained from linear sweep voltammetry. At low sweep rates, the sweep coulogram also exhibits five distinct bands. However, with increase in the sweep rate, the bands progressively reduce in number. The capacitance of the polaron band decreases linearly with square root of sweep rate and attains the equilibrium capacitance at zero sweep rate. Intrinsically conducting polymers (ICPs) are flexible, easily processable, light-weight and relatively less expensive materials. Moreover, they possess a property called 'pseudocapacitance'. This property is associated with the faradaic charging process, which mimics a capacitive process in its current-potential response.1 Due to a high capacitance associated with faradaic charging modes, the charge storage capacity of conducting polymer electrodes is substantially greater than that of double layer capacitors. For example, the nominal charge stored in a polyaniline film is approximately 500 Cg −1 compared to that in high surface-area carbon particle electrodes, which is less than 50 Cg −1 . 2 Owing to a combination of attractive properties possessed by ICPs, they are increasingly being considered for use in a variety of applications including rechargeable batteries, Two important attributes of polymer electrodes used in charge storage devices are, its energy density and power density. The energy density is a thermodynamic characteristic of the electrode which depends on the number of chargeable sites per unit volume of the electrode and the structure of the energy bands in which these sites are located. The latter depends upon the distribution of the conjugation lengths in the polymer. 21 On the other hand, the power density depends on how fast the energy bands can be filled up (or emptied) when the potential is increased (or decreased), which depends on a variety of parameters such as electrode thickness, pore size distribution, degree of crystallinity, degree of branching of chains etc. The nature and the structure of the electrode can affect these attributes in diverse manner. For example, one can increase the energy density substantially by making ...

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“…Sulfur and polysufides cannot easily escape from the composite with conducting polymer coating. Moreover, the conductive feature of polymers facilitates the lithium ion and electron transport in the Li/S cells and high-rate charge/ discharge capability can be expected [44,[91][92][93][94][95][96]. A PANi nanotube/sulfur (SPANI-NT/S) composite was reported in which sulfur reacts with the unsaturated bonds in PANi to form a cross-linked network via a "vulcanization reaction", providing a strong chemical confinement to the soluble polysulfides (Fig.…”

Section: Sulfur Compositesmentioning

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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Fabrication of conductive polymer-coated sulfur composite cathode materials based on layer-by-layer assembly for rechargeable lithium–sulfur batteries

Cited by 49 publications

References 43 publications

Synthesis of Multiwalled Carbon Nanotube Aqueous Suspension with Surfactant Sodium Dodecylbenzene Sulfonate for Lithium/Sulfur Rechargeable Batteries

Synthesis of Multiwalled Carbon Nanotube Aqueous Suspension with Surfactant Sodium Dodecylbenzene Sulfonate for Lithium/Sulfur Rechargeable Batteries

Estimation of Equilibrium Capacitance of Polyaniline Films Using Step Voltammetry

Lithium/Sulfur Secondary Batteries: A Review

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