Preparation method and application of molybdenum phosphide/carbon fiber composite material
A composite material and carbon fiber technology, applied in the direction of phosphide, fiber chemical characteristics, rayon manufacturing, etc., can solve the problems of difficult removal of long-chain organic solvents, corrosiveness, phosphine toxicity, etc., to improve cycle stability, The effect of strong solubility and high redox activity
Pending Publication Date: 2021-01-22
GUANGDONG UNIV OF TECH
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Abstract
The invention belongs to the technical field of transition metal phosphide composite materials. The invention provides a preparation method and application of a molybdenum phosphide/carbon fiber composite material. The preparation method comprises the steps of preparation of a spinning solution from a phosphorus source, a molybdenum source and a carbon source, electrostatic spinning, pre-oxidationand high-temperature carbonization, and the preparation method provided by the invention is simple to operate and can realize continuous production. Phosphomolybdic acid is dissolved in a phytic acidsolution to prepare the spinning solution, and the prepared spinning solution is stable and high in dispersity; the interaction force between transition metal and phosphide can be enhanced, and the phosphorus content of a product can be increased; the conductivity of the spinning solution is effectively improved, and the cycling stability and the rate capability of the molybdenum phosphide/carbonfiber composite material are improved. The molybdenum phosphide/carbon fiber composite material prepared by the invention is high in specific capacity, stable in circulation and excellent in rate capability when being applied to a negative electrode of a sodium-ion battery. The molybdenum phosphide/carbon fiber composite material still keeps the specific capacity of 100 mAh/g or above after 1000times of circulation under the current density of 1A/g, and thus is high in capacity retention rate.
Application Domain
Cell electrodesSecondary cells +2
Technology Topic
ElectrospinningElectro conductivity +13
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