Lithium-manganese dioxide primary battary and preparation thereof

A lithium-manganese dioxide primary battery, comprising:

• a dry cell;
• an electrolyte;
• and
• a casing;
• wherein the dry cell comprises a plurality of positive plates, a plurality of negative plates and a plurality of separators;
• the plurality of positive plates, the plurality of negative plates and the plurality of separators are laminated in a manner of repeated “positive plate-separator-negative plate-separator”;
• the lithium-manganese dioxide primary battery is prepared by placement of the dry cell in the casing, injection of the electrolyte, primary aging, sealing and secondary aging;
• each of the plurality of positive plates is a graphene-based manganese dioxide positive plate;
• each of the plurality of negative plates is a lithium-carbon composite negative plate;
• both surfaces of each of the plurality of positive plates are provided with a positive reserved tab, respectively;
• both surfaces of each of the plurality of negative plates are provided with a negative reserved tab, respectively;
• and the lithium-manganese dioxide primary battery has a discharge capacity equal to or larger than 3C at −40° C.;
• the dry cell is provided with a positive tab and a negative tab;
• positive reserved tabs of the plurality of positive plates are aligned with each other and welded with a first flat metal sheet current collector to form the positive tab;
• negative reserved tabs of the plurality of negative plates are aligned with each other and welded with a second flat metal sheet current collector to form the negative tab;
• each of the plurality of ceramic separators is a nanoporous ceramic separator;
• the electrolyte is made by mixing 0.7-2 mol of a lithium salt with an organic solvent, wherein the organic solvent is carbonate or carboxylate;
• and
• the positive tab and the negative tab are respectively provided at both ends of the casing to respectively serve as a positive current collector and a negative current collector.