3 results about "Sulphite salt" patented technology

A class of cathode materials and secondary ion batteries containing these materials are provided. These cathode materials at least include a cathode active substance comprising a first active substance and a carrier. The first active substance is selected from alkali metal halide or alkali metal sulfite, alkaline earth metal halide or alkaline earth metal sulfite, aluminum halide, zinc halide and zinc sulfite. The carrier has a low-dimensional structure and is selected from a template and / or a second active substance. The first active substance of the cathode material has a relatively low molecular weight and a relatively high redox potential, and thus the secondary ion batteries have a relatively high specific capacity and voltage.

The application discloses a method for recovering multiple metals from waste lithium batteries, comprising the following steps: S1. mixing waste lithium battery black powder with a magnesium-containing chlorinating agent, and performing roasting treatment to obtain a roasting product; S2. mixing the roasting product with a weak alkaline leaching agent, and performing leaching treatment, and after filtration, a lithium-containing solution and a filter residue are obtained; S3. adding an ammonia-carbonate-sulfite composite leaching agent to the filter residue to perform ammonia leaching treatment, and after filtration, a nickel-cobalt-rich ammonia complex leaching solution and a manganese-rich solid residue are obtained; S4. sequentially performing heating and extraction treatment on the nickel-cobalt-rich ammonia complex leaching solution, and nickel sulfate and cobalt sulfate are obtained; performing dissolution and precipitation treatment on the manganese-rich solid residue, and a manganese salt is obtained; through the synergistic coupling of magnesium chloride roasting and composite ammonia leaching, lithium is preferentially extracted, and the pre-activation of transition metal phases is realized, so that the inherent contradiction that lithium efficient extraction and nickel-cobalt efficient leaching cannot be achieved simultaneously in the existing process is successfully resolved.

A shelf-stable aqueous reducing agent solution comprises a) a sulfinate of formula (Ia), b) a sulfonate of formula (Ib), and c) optionally, a sulfite of formula (Ic) M2SO3, wherein M is an equivalent of an alkali metal; wherein the total concentration of a), b) and c) is more than 10% by weight. The shelf stability of the reducing agent solution is significantly improved. The shelf-stable aqueous reducing agent solution is useful as a shippable form of a sulfinate of formula (Ia), in a method to inhibit decomposition of a sulfinate of formula (Ia) solution during storage and / or shipment, and in a method of performing a reducing step.