3D Mesoporous Ni(OH)2/WS2 Nanofibers with Highly Enhanced Performances for Hybrid Supercapacitors. Issue 3 (6th March 2019) - Jiang, Zimin
Abstract : 3D Ni(OH)2 /tungsten disulfide (WS2 ) nanofibers composed of ultrathin nanoflakes are synthesized by electrospinning followed by a hydrothermal process, which have a large specific surface of 64.56 m 2 g −1 . When tested in a three‐electrode configuration, the WS2 /Ni(OH)2 nanofiber‐based electrode exhibits a high specific capacity of 354 C g −1 at a current density of 1 A g −1 . The hybrid storage device, in which WS2 /Ni(OH)2 nanofibers and graphene are used as the positive and negative electrodes, respectively, exhibits a high energy density of 34 Wh kg −1 at a power density of 940 W kg −1 and a high capacity retention of 83% after 4000 cycles at 4 A g −1 . The as‐synthesized 3D Ni(OH)2 /WS2 nanofibers provide a way for the WS2 nanostructure to optimize its viability and potential in constructing a high‐performance energy storage device. Abstract : 3D porous Ni(OH)2 /tungsten disulfide (WS2 ) composite nanofibers serve as electrode materials for supercapacitors with good electrochemical performance. The as‐synthesized Ni(OH)2 /WS2 nanofibers provide a way for the WS2 nanostructure to optimize its viability and potential in constructing high‐performance energy storage devices.