Facile Synthesis of Molybdenum Disulfide Nanosheets/Nitrogen‐Doped Porous Carbon Composites for High‐Performance Anode Material in Lithium‐Ion Batteries. Issue 10 (11th April 2017)

• Record Type: Journal Article
• Authors: Guo, Shuainan; Zhang, Qian; Zhu, Zhixin; Xie, Jiawei; Fan, Jinchen; Xu, Qunjie; Shi, Penghui; Min, Yulin
• Is Part Of: ChemistrySelect. Volume 2:Issue 10(2017)
• Page Start: 3117
• Page End: 3128
• Publication Date: 2017-04-11
• Subjects: Liquid-phase exfoliation -- Molybdenum disulfide -- Nitrogen-doped porous carbon -- Lithium-ion batteries; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201700176
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: A facile strategy to prepare MoS2 nanosheets/nitrogen‐doped porous carbon (MoS2 /NDPC) composites is designed based on liquid‐phase exfoliation (LPE). For preparation of MoS2 /NDPC, chitosan (CS) is not only served as a good medium for LPE of MoS2, but also acted as carbon sources for creating NDPC matrix. Through CS‐assisted LPE of MoS2, the obtained CS‐stabilized MoS2 nanosheets dispersion is further lyophilized into the CS/MoS2 nanosheets foams. By carbonization of CS/MoS2 nanosheets foams, the MoS2 /NDPC composites with MoS2 nanosheets embedded in the NDPC are successfully derived. The obtained MoS2 /NDPC composites can facilitate fast Li‐ion transport and the NDPC enhance the electronic conductivity and retain the structure integrity. Therefore, the MoS2 /NDPC composites can be used as high‐performance anode material in Lithium‐ion batteries, and exhibit outstanding long‐life cycling capability at high rates, namely, a specific capacity as large as 1260 mA h g −1 at 0.1 A g −1 and 434 mA h g −1 at 10 A g −1 after 50 cycles. At a current density of 5 A g −1, the MoS2 /NDPC composites still show a high discharge capacity of ∼ 496 mA h g −1 after 1000 cycles. Abstract : A novel method to prepare MoS2 nanosheets/nitrogen‐doped porous carbon composites is developed based on chitosan‐assisted liquid‐phase exfoliation. With synergistic effect between exfoliated MoS2 nanosheets and nitrogen‐doped porous carbon matrix, the MoS2 nanosheets/nitrogen‐doped porous carbon composites can be acted as high‐performance anode materials for lithium‐ion batteries and exhibit outstanding long‐life cycling capability.