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Chan-soo Kim

Bio: Chan-soo Kim is an academic researcher from Hongik University. The author has contributed to research in topics: Exfoliation joint & Intercalation (chemistry). The author has an hindex of 1, co-authored 2 publications receiving 2 citations.

Papers
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Journal ArticleDOI
Woo-Jin Lee1, Chan-soo Kim1, Seung-Yeol Yang1, Dongwook Lee1, Yong-Seog Kim1 
01 Sep 2021-Carbon
TL;DR: In this paper, the same authors proposed a simple wet chemistry-based methodology reported here paves a way to facile and scaled-up production of large-sized GOs with low defect concentration.

9 citations


Cited by
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TL;DR: In this paper, a glue-assisted grinding exfoliation (GAGE) method was proposed to produce 2D materials with large lateral sizes, high quality, and high yield, including graphene, MoS2, WS2, Bi2O2Se, mica, vermiculite and montmorillonite.

35 citations

Journal ArticleDOI
TL;DR: In this article , a tortuous nanostructured thin film consisting of reduced graphene oxide (rGO) sheets was constructed to achieve a water vapor transmission rate of 4.1 × 10−5 g/m2·day and lag time of 1 month (730 h).

3 citations

Journal ArticleDOI
TL;DR: In this article , an oxygen-containing functional groups rich/defect-rich graphene oxide (D-GO) with large size and porous network structure is developed, which exhibits outstanding adsorption ability to S and Li2Sn.
Abstract: Lithium–sulfur (Li–S) battery has promising application prospect owing to the high energy density. Yet, its cycling life and Coulombic efficiency are always low due to shuttle effect of the mid-product, Li2Sn (4 ≤ n ≤ 8), on the cathode. Herein, oxygen-containing functional groups rich/defect-rich graphene oxide (D-GO) with large size and porous network structure is developed, which exhibits outstanding adsorption ability to S and Li2Sn. S can be uniformly deposited onto the D-GO ([email protected]), and the proportion of S is as high as 89.5 wt% in the composite. As cathode of Li–S batteries, the [email protected] can deliver a high capacity of 1370 mAh/g at 0.05 C. The capacity is still as high as 1011 mAh/g at 1 C, and 95% of the initial value is remained after 400 cycles' cycling, exhibiting good rate performance and cycling stability. Meanwhile, the Coulombic efficiency is close to 100% during the whole test, suggesting that the D-GO can inhibit the shuttle of polysulfide effectively. Most important, with a high loading amount of 14.8 mg/cm2 for the [email protected], areal capacity of the cathode still can reach 14.85 mAh/cm2 at 0.1 C, indicating high practical and commercial value in energy storage field.

2 citations

Journal ArticleDOI
TL;DR: In this paper , a collaborative control strategy of monodisperse MoS2/graphite composites was utilized and studied in detail, where the graphite sheets were uniformly dispersed between the molybdenum disulfide sheets by the ball-milling process, which effectively reduced the agglomeration and simultaneously improved the electrical conductivity of the composite.
Abstract: Traditional graphite anode material typically shows a low theoretical capacity and easy lithium decomposition. Molybdenum disulfide is one of the promising anode materials for advanced lithium-ion batteries, which possess low cost, unique two-dimensional layered structure, and high theoretical capacity. However, the low reversible capacity and the cycling-capacity retention rate induced by its poor conductivity and volume expansion during cycling blocks further application. In this paper, a collaborative control strategy of monodisperse MoS2/graphite composites was utilized and studied in detail. MoS2/graphite nanocomposites with different ratios (MoS2:graphite = 20%:80%, 40%:60%, 60%:40%, and 80%:20%) were prepared by mechanical ball-milling and low-temperature annealing. The graphite sheets were uniformly dispersed between the MoS2 sheets by the ball-milling process, which effectively reduced the agglomeration of MoS2 and simultaneously improved the electrical conductivity of the composite. It was found that the capacity of MoS2/graphite composites kept increasing along with the increasing percentage of MoS2 and possessed the highest initial discharge capacity (832.70 mAh/g) when MoS2:graphite = 80%:20%. This facile strategy is easy to implement, is low-cost, and is cosmically produced, which is suitable for the development and manufacture of advance lithium-ion batteries.

1 citations