화학공학소재연구정보센터
Journal of Electroanalytical Chemistry, Vol.841, 111-118, 2019
Facile synthesis of Y-2(MoO4)(3) nanowires as anode materials towards enhanced lithium storage performance
Owing to the high theoretical capacity, molybdenum (Mo)-based materials are promising as high-performance anode for lithium-ion batteries (LIBs). Therefore, Y-2(MoO4)(3) is investigated as anode candidate for the first time in this work. Moreover, in an attempt to improve ionic diffusivity and capacity retention of Y-2(MoO4)(3), molybdenum -based Y-2(MoO4)(3) nanowires are successfully formed by a feasible electrospinning method. And the morphologies of as-prepared sample are observed by scanning electron microscope (SEM), transmission electron microscope (TEM) and high-resolution transmission electron microscope (HRTEM). Herein, the Y-2(MoO4)(3) nanowires show a remarkable charge specific capacity of 480.1 mA h g(-1) with 67.1% capacity retention at 100 mA g(-1) after 100 cycles. While the capacity retention of Y-2(MoO4)(3) micro-particles is only 24.4% under the same conditions. Besides, ex-situ X-ray diffraction (XRD), ex-situ TEM and ex-situ X-ray photoelectron spectrometer (XPS) tests are carried to study lithium storage reaction of Y-2(MoO4)(3) upon the charge/discharge reactions. The results confirm that the Y-2(MoO4)(3) undergoes a typical conversion reaction, accompanied by the irreversible particle pulverization of structure.