Effects of Multiwalled Carbon Nanotubes on the Cycle Performance of Sulfur Electrode for Li/S Secondary Battery

Jeong, Sang Sik; Choi, Young Jin; Kim, Ki Won

doi:10.4028/www.scientific.net/msf.510-511.1106

Cited by 4 publications

(3 citation statements)

References 4 publications

(3 reference statements)

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“…However, the use of porous silica, alumina, and mixed metal oxides leads to a low electrical conductivity of the cathode, which is unfavorable of hig-performance electrodes. In this sense, high-surface-area carbon nanotubes and nanofibers are better materials for the sulfur cathodes than the high-surface-area oxides. ,− Recent reports suggest that porous carbons are the most promising materials for the sulfur cathodes: the cathode made of sulfur on mesoporous carbon shows an excellent rate performance while retaining good cyclability of the cathode at low sulfur loading, however, results in a low energy density; the cathode made of sulfur on microporous carbon shows an excellent cyclability but compromises the rate performance …”

Section: Introductionmentioning

confidence: 99%

Hierarchically Structured Sulfur/Carbon Nanocomposite Material for High-Energy Lithium Battery

2009

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We report herein a hierarchically structured sulfur-carbon (S/C) nanocomposite material as the high surface-area cathode for rechargeable lithium batteries. A porous carbon with a uniform distribution of mesopores of 7.3 nm has been synthesized through a soft-template synthesis method. The potassium hydroxide activation of this mesoporous carbon results in a bimodal porous carbon with added microporosity of less than 2 nm to the existing mesopores without deterioration of the integrity of the original mesoporous carbon. Elemental sulfur has been loaded to the micropores through a solution infiltration method. The resulted S/C composites with various loading level of sulfur have a high surface areas and large internal porosities. These materials have been tested as novel cathodes for Li/S batteries. The results show that the cyclability and the utilization of sulfur in the Li/S batteries have been significantly improved. The large internal porosity and surface area of the micromesoporous carbon is essential for the high utilization of sulfur.

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Section: Introductionmentioning

confidence: 99%

Hierarchically Structured Sulfur/Carbon Nanocomposite Material for High-Energy Lithium Battery

2009

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“…Recently, the MWNT was revealed as an excellent conducting material for lithium secondary batteries because of its effective electron conduction path and network structure [8][9][10]. The electrochemical property of the Li/S battery could be improved by partial substitution of MWNT for carbon [8,11,12]. However, there have been no reports regarding the Li/MoS 2 cell using carbon nanotubes as the conducting agent.…”

Section: Introductionmentioning

confidence: 97%

The electrochemical properties of Li/TEGDME/MoS2 cells using multi-wall carbon nanotubes as a conducting agent

et al. 2010

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We investigated the first charge-discharge behavior and cycling property of Li batteries using MoS 2 electrodes with multi-wall carbon nanotubes (MWNT) as a conducting agent. The MoS 2 electrode was prepared using MWNT as the conducting agent. The battery gave a high first discharge capacity of 440 mAhg -1 with a plateau potential region at 1.1 V. The Li/MoS 2 battery using MWNT showed a higher discharge capacity compared to acetylene black. After ten cycles of the battery using MWNT, the discharge capacity decreased to 120 mAhg -1 , which corresponded to 30% of the first discharge capacity. Adding a carbon nanotube into the MoS 2 electrode improved the first discharge behavior, but did not affect the cycling property of the Li/MoS 2 cell.Keywords Molybdenum disulfide (MoS 2 ) Á Multi-wall carbon nanotube (MWNT) Á Conducting agent Á Battery

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“…In the cathode material design, the use of conductive carbon materials, the design of nanostructured sulfur cathodes, and the incorporation of polar metal materials are the most common and widely used methods. Conductive carbon materials, such as carbon nanotubes [ 8 , 9 , 10 , 11 , 12 ] and graphene [ 12 , 13 , 14 , 15 , 16 ], can encapsulate polysulfides in the internal pores by physical adsorption [ 17 ]. However, the interaction between non-polar carbon materials and polar polysulfides is weak and cannot inhibit the diffusion of polysulfides in the long cycle process [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Graphene/Heterojunction Composite Prepared by Carbon Thermal Reduction as a Sulfur Host for Lithium-Sulfur Batteries

Gao

Shi

et al. 2023

Materials

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An interlayer nanocomposite (CC@rGO) consisting of a graphene heterojunction with CoO and Co9S8 was prepared using a simple and low-cost hydrothermal calcination method, which was tested as a cathode sulfur carrier for lithium-sulfur batteries. The CC@rGO composite comprises a spherical heterostructure uniformly distributed between graphene sheet layers, preventing stacking the graphene sheet layer. After the introduction of cobalt heterojunction on a graphene substrate, the Co element content increases the reactive sites of the composite and improves its electrochemical properties to some extent. The composite exhibited good cycling performance with an initial discharge capacity of 847.51 mAh/g at 0.5 C and a capacity decay rate of 0.0448% after 500 cycles, which also kept 452.91 mAh/g at 1 C and in the rate test from 3 C back to 0.1 C maintained 993.27 mAh/g. This article provides insight into the design of cathode materials for lithium-sulfur batteries.

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Effects of Multiwalled Carbon Nanotubes on the Cycle Performance of Sulfur Electrode for Li/S Secondary Battery

Cited by 4 publications

References 4 publications

Hierarchically Structured Sulfur/Carbon Nanocomposite Material for High-Energy Lithium Battery

Hierarchically Structured Sulfur/Carbon Nanocomposite Material for High-Energy Lithium Battery

The electrochemical properties of Li/TEGDME/MoS2 cells using multi-wall carbon nanotubes as a conducting agent

Graphene/Heterojunction Composite Prepared by Carbon Thermal Reduction as a Sulfur Host for Lithium-Sulfur Batteries

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