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Ultra-Thin ReS2 Nanosheets Grown on Carbon Black for Advanced Lithium-Ion Battery Anodes

by Yaping Yan 1,2,†, Kyeong-Youn Song 3,†, Minwoo Cho 1, Tae Hoon Lee 4,5, Chiwon Kang 1,* and Hoo-Jeong Lee 1,3,*
School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Korea
Department of Physics and Institute of Basic Science, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon 16419, Gyeonggi-do, Korea
SKKU Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University, Suwon 16419, Korea
Center for Integrated Nanostructure Physics (CINAP), Institute for Basic Science (IBS), Suwon 16419, Korea
Department of Energy Science, Sungkyunkwan University (SKKU), Suwon 16419, Korea
Authors to whom correspondence should be addressed.
These co-first authors contributed equally to this work.
Materials 2019, 12(9), 1563;
Received: 30 March 2019 / Revised: 2 May 2019 / Accepted: 9 May 2019 / Published: 13 May 2019
(This article belongs to the Section Energy Materials)
ReS2 nanosheets are grown on the surface of carbon black (CB) via an efficient hydrothermal method. We confirmed the ultra-thin ReS2 nanosheets with ≈1–4 layers on the surface of the CB (ReS2@CB) by using analytical techniques of field emission scanning electron microscopy (FESEM) and high-resolution transmission electron microscopy (HRTEM). The ReS2@CB nanocomposite showed high specific capacities of 760, 667, 600, 525, and 473 mAh/g at the current densities of 0.1 (0.23 C), 0.2 (0.46 C), 0.3 (0.7 C), 0.5 (1.15 C) and 1.0 A/g (2.3 C), respectively, in conjunction with its excellent cycling performance (432 mAh/g at 2.3 C; 91.4% capacity retention) after 100 cycles. Such LIB performance is greatly higher than pure CB and ReS2 powder samples. These results could be due to the following reasons: (1) the low-cost CB serves as a supporter enabling the formation of ≈1–4 layered nanosheets of ReS2, thus avoiding its agglomeration; (2) the CB enhances the electrical conductivity of the ReS2@CB nanocomposite; (3) the ultra-thin (1–4 layers) ReS2 nanosheets with imperfect structure can function as increasing the number of active sites for reaction of Li+ ions with electrolytes. The outstanding performance and unique structural characteristics of the ReS2@CB anodes make them promising candidates for the ever-increasing development of advanced LIBs. View Full-Text
Keywords: ultra-thin ReS2 nanosheets; carbon black (CB); lithium-ion battery (LIB) ultra-thin ReS2 nanosheets; carbon black (CB); lithium-ion battery (LIB)
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Yan, Y.; Song, K.-Y.; Cho, M.; Lee, T.H.; Kang, C.; Lee, H.-J. Ultra-Thin ReS2 Nanosheets Grown on Carbon Black for Advanced Lithium-Ion Battery Anodes. Materials 2019, 12, 1563.

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