Preparation method of Se-C positive electrode composite material of lithium-selenium battery

Abstract

The invention specifically relates to a preparation method of a Se-C positive electrode composite material of a lithium-selenium battery. The preparation method comprises the following steps: firstly, putting selenium and carbon materials into a ball mill and mixing by ball milling, and then putting the mixture into a microwave furnace for microwave heating compounding to prepare the Se-C positive electrode microwave composite material high in dispersion uniformity. The carbon material utilized in the preparation method is a material subjected to commercial quantity production and is low in cost; meanwhile, according to the microwave heating compounding method, the operation process is simple, the energy consumption is low and the yield is high; the product is relatively high in performance consistency, and can be produced continuously and applied commercially.

Description

(1) Technical field

[0001] The invention belongs to the field of electrochemical batteries, and in particular relates to a preparation method of a Se-C cathode composite material for a lithium-selenium battery. (2) Background technology

[0002] The theoretical specific energy of lithium-sulfur batteries reaches 2600Wh / kg, which is much higher than LiCoO, a common cathode material for lithium-ion batteries. 2 , LiMnO 2 、LiFePO 4 capacity. In addition, lithium-sulfur batteries have the advantages of high specific capacity, no pollution, abundant resources and low price. Therefore, sulfur is a very attractive active material for secondary lithium batteries, especially in the direction of power vehicles, which has a good application prospect. However, limited by the insulation of sulfur and its discharge product lithium sulfide, and the characteristics of a series of lithium polysulfide intermediates formed during charging and discharging, which are easily soluble in electr...

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