3 results about "Sulfur utilization" patented technology

This invention discloses a resource-based treatment system and method for barium sulfide slag. The system involves crushing and leaching the barium sulfide slag using a pretreatment unit, thereby leaching out the barium sulfide. The barium-enriched washing solution is then processed through an electrophoretic deep treatment unit to achieve high-value recovery of sulfur and barium elements, ultimately realizing the resource utilization of the barium slag. The entire process is pollution-free and has the advantages of being environmentally friendly, having high added value, high sulfur utilization efficiency, low cost, and simple operation. It is suitable for large-scale industrial applications and has broad market prospects and significant economic benefits.

The application discloses a kind of sulfur-coordinated iron single-atom modified radial gradient pore nitrogen-doped carbon lithium-sulfur battery positive electrode carrier materials and preparation method and application, belong to lithium-sulfur battery positive electrode material technical field.Oxidized graphene is mixed and dispersed in water with cellulose nanofiber, to form dispersion, zinc salt and iron salt are prepared mixed metal salt solution is added to the dispersion, composite hydrogel is formed by electrostatic self-assembly and is immersed in the solution containing sulfur organic precursor, to obtain sulfur-containing composite hydrogel;After directional freezing, freeze-drying, the aerogel precursor with radial gradient pore structure is obtained;In inert atmosphere protection, with solid-state nitrogen source in isothermal zone but non-contact, program temperature carbonization treatment is carried out, and the sulfur-coordinated iron single-atom modified radial gradient pore nitrogen-doped carbon lithium-sulfur battery positive electrode carrier material is obtained.By sulfur-coordinated regulation atomic activity and radial gradient pore optimization mass transfer synergy, the sulfur utilization, rate performance and cycle life are significantly improved.

This invention relates to a room-temperature alkali metal-sulfur or alkaline earth metal-sulfur flow battery and its preparation method. The room-temperature alkali metal-sulfur or alkaline earth metal-sulfur flow battery includes a positive electrode region, a negative electrode region, and a separator. The positive electrode region includes a positive electrode liquid containing sulfur and an alkali metal or alkaline earth metal. The negative electrode region includes a negative electrode liquid containing a liquid alkali metal negative electrode. This invention, by forming a positive electrode liquid, promotes the dissolution of short-chain polysulfides generated during discharge, thereby improving sulfur utilization and maximizing the capacity of the positive electrode active material. By forming a negative electrode liquid, it avoids the formation of metal dendrites and ensures that the battery system can operate at room temperature, reducing the cost of the thermal management system. The flow battery prepared by this invention has high charge / discharge capacity and excellent safety performance.