Embodiments of the present disclosure disclose a low-cost alkaline secondary battery positive electrode material and a preparation method and application thereof, which belongs to the technical field of alkaline secondary battery. The positive electrode material includes a composite positive electrode material including manganese dioxide and partially oxidized layered hydroxide, etc. The composite positive electrode material prepared by the embodiments of the present disclosure has the advantage of a high discharge platform, or the like, with respect to a conventional manganese electrode, which significantly improves the cycling stability and reversibility of the zinc-manganese alkaline secondary battery.

Embodiments of the present disclosure disclose a low-cost alkaline secondary battery positive electrode material and a preparation method and application thereof, which belongs to the technical field of alkaline secondary battery. The positive electrode material includes a composite positive electrode material including manganese dioxide and partially oxidized layered hydroxide, etc. The composite positive electrode material prepared by the embodiments of the present disclosure has the advantage of a high discharge platform, or the like, with respect to a conventional manganese electrode, which significantly improves the cycling stability and reversibility of the zinc-manganese alkaline secondary battery.

A method for treating a manganese-copper mixed solution is disclosed, including the following steps: adjusting a pH value of the manganese-copper mixed solution to 6.5 to 7 to obtain a solution defined as a first solution; adding an oxidant into the first solution to obtain a solution defined as a second solution, where the oxidant reacts with Mn.sup.2+ at a pH value of 6.5 to 7 to generate MnO.sub.2; and collecting a first precipitate. This method is time-saving in separating manganese ions, and can recover high-purity manganese ions. The recovered waste liquid is treated by a simple method and causes little pollution to the environment.

A method for treating a manganese-copper mixed solution is disclosed, including the following steps: adjusting a pH value of the manganese-copper mixed solution to 6.5 to 7 to obtain a solution defined as a first solution; adding an oxidant into the first solution to obtain a solution defined as a second solution, where the oxidant reacts with Mn.sup.2+ at a pH value of 6.5 to 7 to generate MnO.sub.2; and collecting a first precipitate. This method is time-saving in separating manganese ions, and can recover high-purity manganese ions. The recovered waste liquid is treated by a simple method and causes little pollution to the environment.

Processes are provided in which successive steps of hydrometallurgical value extraction may be carried out using the products of carbon capture and an electrolytic reagent-generating process. The electrolytic process provides an acid leachant and an alkali hydroxide, with the alkali hydroxide then available for use either directly as a precipitant in the hydrometallurgical steps, or available for conversion by carbon capture to an alkali metal carbonate that can in turn be used as the precipitant in the selective hydrometallurgical steps.

Processes are provided in which successive steps of hydrometallurgical value extraction may be carried out using the products of carbon capture and an electrolytic reagent-generating process. The electrolytic process provides an acid leachant and an alkali hydroxide, with the alkali hydroxide then available for use either directly as a precipitant in the hydrometallurgical steps, or available for conversion by carbon capture to an alkali metal carbonate that can in turn be used as the precipitant in the selective hydrometallurgical steps.

A method of manufacturing a nanocomposite may include combining a magnesium salt, an aluminum salt, and a manganese salt in stoichiometric proportions within 5 mol. % in an aqueous solvent including menthol or dextrose, to obtain a first mixture. The method further may include heating the first mixture to remove at least 99.5 percent by weight (wt. %) of the aqueous solvent to obtain a first solid, grinding the first solid into a first powder, calcining the first powder at a temperature of about 600 to 800 C. for a time of about 2 to 4 hours to obtain a second solid, grinding the second solid and urea, into a second powder, heating the second powder at a temperature of about 550 to 650 C. for a time of about 15 minutes to 1.5 hours to obtain the nanocomposite.

A method of manufacturing a nanocomposite may include combining a magnesium salt, an aluminum salt, and a manganese salt in stoichiometric proportions within 5 mol. % in an aqueous solvent including menthol or dextrose, to obtain a first mixture. The method further may include heating the first mixture to remove at least 99.5 percent by weight (wt. %) of the aqueous solvent to obtain a first solid, grinding the first solid into a first powder, calcining the first powder at a temperature of about 600 to 800 C. for a time of about 2 to 4 hours to obtain a second solid, grinding the second solid and urea, into a second powder, heating the second powder at a temperature of about 550 to 650 C. for a time of about 15 minutes to 1.5 hours to obtain the nanocomposite.

Embodiments of the present disclosure disclose a low-cost alkaline secondary battery positive electrode material and a preparation method and application thereof, which belongs to the technical field of alkaline secondary battery. The positive electrode material includes a composite positive electrode material including manganese dioxide and partially oxidized layered hydroxide, etc. The composite positive electrode material prepared by the embodiments of the present disclosure has the advantage of a high discharge platform, or the like, with respect to a conventional manganese electrode, which significantly improves the cycling stability and reversibility of the zinc-manganese alkaline secondary battery.

Embodiments of the present disclosure disclose a low-cost alkaline secondary battery positive electrode material and a preparation method and application thereof, which belongs to the technical field of alkaline secondary battery. The positive electrode material includes a composite positive electrode material including manganese dioxide and partially oxidized layered hydroxide, etc. The composite positive electrode material prepared by the embodiments of the present disclosure has the advantage of a high discharge platform, or the like, with respect to a conventional manganese electrode, which significantly improves the cycling stability and reversibility of the zinc-manganese alkaline secondary battery.