Carbon-based material inlaid and penetrated with sulfur and aluminum secondary battery using same as cathode active material

Abstract

The invention discloses a preparation method of anode active material of a rechargeable aluminum secondary battery, the secondary battery using the anode active material and a preparation method of the secondary battery. The invention aims to provide a high energy aluminum secondary battery of which anode active material has simple preparation process, low cost, no pollution and good circularity and a preparation method of the high energy battery. The anode active material is prepared by adopting a high temperature high pressure inlay and penetrating process to ensure sulfur in carbon-sulfur mixture with sulfur (S8) or sulfenyl compounds to inlay and penetrate into the surface of carbon-base and micropores at 90-300 DEG C and 320-800 DEG C under the pressure of 0.01-5 MPa. The aluminum secondary battery contains a anode prepared by the anode active material, a aluminum cathode and a aluminum electrolyte system. The products of the invention can be used as power batteries and energy-storage batteries to be widely used in electric bicycles, electric cars, emergency power supplies, peak value adjusting systems of power station and energy-storage systems of new energies such as solar energy, wind energy and the like, and has very broad development prospect.

Description

technical field [0001] The invention relates to a novel positive electrode active material of a secondary aluminum battery, a preparation method thereof, and a secondary aluminum battery using the material. relates to electrode materials used in electrochemical cells, and more particularly, the present invention relates to a process for the preparation of "sulfur (S 8 ), sulfur-based compounds or their mixtures, said sulfur-based compounds include organic sulfur and carbon-sulfur compounds, the above-mentioned carbon-sulfur compounds especially refer to the method of embedding sulfur compounds or combinations on carbon-based, and using the positive active A novel secondary aluminum battery of the material and a preparation method of the secondary aluminum battery. Background technique [0002] With people's thirst for high-energy-density power sources, there is an urgent need for the development and application of cheap, safe, environmentally friendly and high-performance s...

AI Technical Summary

Problems solved by technology

However, since there is no pressure in the tube furnace and it is almost open, a large part of the sulfur is discharged with argon gas after heating and gasification, resulting in a lot of losses. First, the amount of coating is small and the coating efficiency is low; second, sulfur is only adsorbed on the surface. poor reversibility

[0008] Adding a carbon-based conductive agent to elemental sulfur only increases the conductivity of the electrode, and does not help the reversible reaction of sulfur; using a tube furnace to coat sulfur under normal pressure and static, the coating efficiency is low and the loss of sulfur is large; No carbon-sulfur inter-compounds are formed, and soluble polysulfides are formed after reaction, which dissolves in the ionic electrolyte to generate disordered sulfur with irreversible reactions; the coating is not stirred under normal pressure and static, the coating is uneven, and the carbon at the bottom is easy to form piece