Method for producing a lithium secondary battery

Abstract

A secondary battery exhibiting a long cycle life and comprising a negative pole activating material made of lithium or zinc is provided. The battery at least having a negative pole made of lithium or zinc serving as the negative pole activating material, an electrolyte (electrolytic solution), a separator, a positive pole made of a positive pole activating material, a collecting electrode and a battery case, wherein at least the surface of the negative pole is covered with a film having a structure which allows ions relating to the battery reactions to pass through. Since growth of dendrites of lithium or zinc at the time of charge can be prevented, short circuiting between the negative pole and the positive pole can be prevented. Therefore, the charge/discharge cycle life can significantly be lengthened. As a result, a lithium secondary battery, a nickel-zinc secondary battery, an air-zinc secondary battery, a bromine-zinc secondary battery and a silver oxide-zinc secondary battery of long cycle life can be manufactured.

1 . A method for producing a lithium secondary battery using oxidation and reduction reactions of lithium, the method comprising: 
 providing a positive electrode comprising a positive electrode active material by preparing a compound having one or more transition metals and a group VIA element, the compound being (i) a transition metal oxide or a transition metal sulfide; and (ii) including a hydroxyl group and at least one element, which is not a transition metal and which is bonded to the oxygen or the sulfur via an intramolecular bond, selected from the group consisting of lithium, carbon, magnesium, sodium, potassium, nitrogen, aluminum, calcium, barium, lead, indium, boron, silicon, tin, phosphorous, arsenic, antimony, bismuth, fluorine and chlorine;    providing a negative electrode comprising a negative electrode active material;    providing an electrolyte or an electrolytic solution;    providing a separator; and    combining the positive electrode, the negative electrode and the electrolyte or the electrolytic solution to form a battery such that the negative electrode and the positive electrode are electrically connected by the electrolyte or the electrolytic solution and are separated by the separator.    
   
   
       2 . The method according to  claim 1 , wherein the hydrogen contained in the positive electrode active material can be identified by SIMS (Secondary Ion Mass Spectrometry) analysis.  
   
   
       3 . The method according to  claim 1 , wherein the positive electrode active material is an aggregate comprising amorphous, a mixture of amorphous and microcrystal, or a mixture of amorphous, microcrystal and multi-crystal.  
   
   
       4 . The method according to  claim 1 , wherein the positive electrode material has a crystal grain size of 500 Å or less.  
   
   
       5 . The method according to  claim 1 , wherein the positive electrode material is an aggregate form selected from the group consisting of amorphous, a mixture of amorphous and microcrystal, and a mixture of amorphous, microcrystal and multi-crystal.  
   
   
       6 . The method according to  claim 1 , wherein the group VIA element is oxygen.  
   
   
       7 . The method according to  claim 1 , wherein the group VIA element is sulfur.  
   
   
       8 . The method according to  claim 1 , wherein the positive electrode material is coated with a conductive thin film.  
   
   
       9 . The method according to  claim 1 , wherein the positive electrode material of a type in which a conductor powder serving as a core is covered with a compound of the transition metal and the group VIA is used.  
   
   
       10 . The method according to  claim 1 , wherein the positive electrode material comprising one or more mixed materials selected from the group consisting of a carbon material, a resin material and a metal material.  
   
   
       11 . The method according to  claim 1 , wherein the positive electrode material is subjected to a lipophilic treatment.  
   
   
       12 . The method according to  claim 11 , wherein an organo-metallic compound is used in the lipophilic treatment.  
   
   
       13 . The method according to  claim 12 , wherein the resin material comprises one or more types of resins selected from the group consisting of fluororesin, polyethylene, polypropylene and silicon resin.  
   
   
       14 . The method according to  claim 13 , wherein the resin material is a liquid or a resin solution.  
   
   
       15 . The method according to  claim 14 , wherein the resin is fluororesin having an ether bond.  
   
   
       16 . The method according to  claim 1 , wherein the negative electrode active material comprises one or more types of materials selected from the group consisting of lithium, lithium alloy and carbon.  
   
   
       17 . The method according to  claim 1 , wherein the negative electrode active material is covered with a film through which lithium ions are unable to pass.  
   
   
       18 . The method according to  claim 1 , wherein the electrolyte comprises at least one alkali metal compound.  
   
   
       19 . The method according to  claim 1 , wherein the electrolyte is in a solid state, a solid-liquid state, or a solution dissolved in a non-aqueous solvent.