Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7736590 | Journal of Power Sources | 2014 | 7 Pages |
Abstract
Graphene-based nanosheets (GNS) have been studied for use in electrochemical energy storage devices. A deeper understanding about the system is required for achieving enhanced power output and high energy storage. The effects of sulfur doping on the electrochemical properties of GNS are studied for their use as an anode material in lithium-ion batteries. Sulfur doping in GNS contributes to the high specific capacity by providing more lithium storage sites due to Faradaic reactions. In addition, superior rate performance of sulfur-doped GNS (S-GNS) is achieved through the improved electrical conductivity of S-GNS (1743Â SÂ mâ1), which is two orders of magnitude higher than that of GNS (32Â SÂ mâ1). In addition, good cyclic stability of S-GNS is maintained even after 500 cycles at a high current density of 1488Â mAÂ gâ1 (4Â C).
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Young Soo Yun, Viet-Duc Le, Haegyeom Kim, Sung-Jin Chang, Seung Jae Baek, Sungjin Park, Byung Hoon Kim, Yong-Hyun Kim, Kisuk Kang, Hyoung-Joon Jin,