Uniform Yolk–Shell MoS2@Carbon Microsphere Anodes for High‐Performance Lithium‐Ion Batteries. Issue 41 (29th June 2017)

• Record Type: Journal Article
• Authors: Pan, Yunmei; Zhang, Jiajia; Lu, Hongbin
• Is Part Of: Chemistry. Volume 23:Issue 41(2017)
• Page Start: 9937
• Page End: 9945
• Publication Date: 2017-06-29
• Subjects: electrochemistry -- lithium-ion batteries -- microspheres -- nanostructures -- MoS2; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201701691
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: As an electrode material for lithium‐ion batteries (LIBs), MoS2 has attracted much attention because of its high capacity and low cost. However, the rational design of a novel electrode structure with a high capacity, fast charge/discharge rate, and long cycling lifetime remains a great challenge. Herein, a environmentally friendly etching strategy is reported for the construction of monodisperse, inner void‐controlled yolk–shell MoS2 @carbon microspheres. The resulting anode reveals an initial discharge capacity up to 1813 mAh g −1, a high reversible capacity (1016 mAh g −1 ), excellent cycling stability (200 cycles), and superior rate performance. Such microspheres consist of nanosized MoS2 yolks (≈280 nm), porous carbon shells (≈25 nm) and well‐controlled internal voids in between, opening a new pathway for the optimization of the electrochemical properties of MoS2 ‐based anodes without sacrificing their capacity. In addition, this etching strategy offers a new method for the development of functional, hollow MoS2 ‐based composites. Abstract : A good egg : Highly uniform yolk–shell MoS2 @C microspheres were synthesized as lithium‐ion battery (LIB) anodes, with the inner cavity between the carbon shell and MoS2 core easily tailored through a novel etching technique (see scheme). The rationally designed microsphere anode exhibits high reversible capacity, and excellent cycling stability and rate performance. The etching strategy developed may provide a new approach for the preparation of other carbon‐based hollow nanostructures