title: Spray-painted binder-free SnSe electrodes for high-performance energy-storage devices.
abstract: SnSe nanocrystal electrodes on three-dimensional (3D) carbon fabric and Au-coated polyethylene terephthalate (PET) wafer have been prepared by a simple spray-painting process and were further investigated as binder-free active-electrodes for Lithium-ion batteries (LIBs) and flexible stacked all-solid-state supercapacitors. The as-painted SnSe nanocrystals/carbon fabric electrodes exhibit an outstanding capacity of 676 mAh g(-1) after 80 cycles at a current density of 200 mA g(-1) and a considerable high-rate capability in lithium storage because of the excellent ion transport from the electrolyte to the active materials and the efficient charge transport between current collector and electrode materials. The binder-free electrodes also provide a larger electrochemical active surface compared with electrodes containing binders, which leads to the enhanced capacities of energy-storage devices. A flexible stacked all-solid-state supercapacitor based on the SnSe nanocrystals on Au-coated PET wafers shows high capacitance reversibility with little performance degradation at different current densities after 2200 charge-discharge cycles and even when bent. This allows for many potential applications in facile, cost-effective, spray-paintable, and flexible energy-storage devices. The results indicate that the fabrication of binder-free electrodes by a spray painting process is an interesting direction for the preparation of high-performance energy-storage devices.
authors: Wuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST), Wuhan, 430074 (P.R. China); State Key Laboratory for Superlattices and Microstructures, Institution of Semiconductors, Chinese Academy of Science, Beijing, 100083 (P.R. China).
authors: Xianfu
authors: X
authors: Wang
authors: Bin
authors: B
authors: Liu
authors: Qingyi
authors: Q
authors: Xiang
authors: Qiufan
authors: Q
authors: Wang
authors: Xiaojuan
authors: X
authors: Hou
authors: Di
authors: D
authors: Chen
authors: Guozhen
authors: G
authors: Shen
mesh_terms: D002244:Carbon / Q000737:chemistry; D011211:Electric Power Supplies; D004563:Electrochemistry; D004566:Electrodes; D006046:Gold / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry*; D011093:Polyethylene Terephthalates / Q000737:chemistry; D012643:Selenium / Q000737:chemistry*; D014001:Tin / Q000737:chemistry*
chemical_list: D011093:Polyethylene Terephthalates; D014001:Tin; D002244:Carbon; D006046:Gold; D012643:Selenium
keywords: energy storage; nanocrystals; selenium; three dimensional electrodes; tin