Abstract: The present disclosure relates to the technical field of ferric phosphate, in particular to a process and a system for preparing ferric phosphate by mixing and stirring in a reactor with external circulation. Disclosed is a process for preparing ferric phosphate by mixing and stirring in a reactor with external circulation, comprising the following steps: adding a ferric salt solution, a monoammonium phosphate solution, and a protective agent into the reactor, and subjecting the resulting mixed liquid to a preliminary reaction at 90-100° C.; after the completion of the preliminary reaction, carrying out an external circulation reaction at 85-90° C. The process described in the present disclosure has a high reaction speed, and the obtained ferric phosphate has a high yield and low content of impurity in the ferric phosphate.

Abstract: A 1.5V Li-FeS2 button-type cell battery with metal skeleton, including two half cases in which separator is provided and electrolyte is filled, positive and negative electrodes provided at the two sides of the separator, the separator being microporous polypropylene membrane, or microporous polyethylene membrane, or the combined membrane thereof, or polypropylene felt, or fibrous papery membrane, or glass fiber, the positive electrode comprised of a collector filled with positive active material, the metal skeleton including foamed nickel, fibrous nickel, foamed iron, foamed copper, foamed aluminum, foamed titanium or sintered stainless steel, the positive electrode material comprising of FeS2, conductive agent and binder, the negative electrode being metal lithium, lithium-aluminum alloy or lithium silicon alloy, the electrolyte being obtained by lithium salt dissolved in organic compound solution.