Sandwich architecture of graphene/MoS2 composite as anodes for enhanced reversible lithium and sodium storage. (23rd June 2020)

• Record Type: Journal Article
• Authors: Yang, Zunxian; Zhang, Yufei; Huang, Jianhua; Ye, Bingqing; Lin, Shimin; Liu, Jiahui; Ye, Yuliang; Zheng, Kang; Lu, Ganzhen; Guo, Tailiang; Yu, Xuebin; Chen, Gengxu
• Is Part Of: International journal of energy research. Volume 44:Number 11(2020)
• Page Start: 8314
• Page End: 8327
• Publication Date: 2020-06-23
• Subjects: flower‐like MoS2 -- lithium storage -- sandwich architecture -- sodium storage -- solution evaporation method; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Power resources -- Research -- Periodicals; 621.042
• DOI: 10.1002/er.5357
• Languages: English
• ISSNs: 0363-907X

Abstract

Summary: Transition metal disulfides have been widely used in lithium/sodium ion batteries as cathode materials. However, the huge structural changes in electrochemical processes remain a challenge. Here, 3DG‐MoS2 hybrid nanomaterials with particular sandwich architecture were synthesized successfully by a simple evaporation and hydrothermal reaction method. This process enlarged the spacing between the graphene layers, increased the surface area, promoted electron and lithium/sodium ions diffusion, and alleviated structural deformations during ion insertion, which altogether improved the performance of lithium/sodium storage. Therefore, 3DG‐MoS2 composite nanomaterials exhibited excellent cyclic stability electrochemical performance (955 mAhg −1 at 1 Ag −1 after 500 cycle for LIBs; 479 mA hg −1 at 1 Ag −1 after 300 cycle for SIBs). When the current density gradually reduced to 100 mAg −1, it still delivered excellent lithium/sodium storage capacity ability (1130 mAhg −1 for lithium storage; 663 mAhg −1 for sodium storage) even at 10 cycles of 2 Ag −1 deep charge and discharge. Abstract : 3DG‐MoS2 hybrid nanomaterials with particular 3D sandwich architecture have been synthesized by simple solution evaporation, followed by the thiourea hydrothermal method. This particular architecture was characterized by combining the advantages of MoS2 and CuS and those of graphene would improve the lithium and sodium storage performance. This device from hybrid nanomaterials with particular 3D sandwich architecture exhibited excellent cycling and rate capability performance.