Method for manufacturing lithium-containing composite oxide

A method for manufacturing a lithium-containing composite oxide expressed by a general formula LiMPO4 (M is one or more of Fe (II), Mn (II), Co (II), and Ni (II)), comprising:

• forming a first solution in which a lithium compound is dissolved;
• forming a second solution in which a phosphorus compound is dissolved;
• forming a third solution in which one or more of an iron (II) compound, a manganese (II) compound, a cobalt (II) compound, and a nickel (II) compound are dissolved;
• forming a first mixed solution by mixing the first solution and the second solution, the first mixed solution being slightly alkaline;
• forming a second mixed solution by dripping the first mixed solution in the third solution while stirring the third solution;
• and
• forming single crystal particles of a lithium-containing composite oxide by heating the second mixed solution using a hydrothermal method.

A method for manufacturing an electrode, comprising:

• forming a solution containing Li and P, the solution containing Li and P being slightly alkaline;
• dripping the solution containing Li and P in a solution containing M (M is one or more of Fe (II), Mn (II), Co (II), and Ni (II)) while stirring the solution containing M to form a mixed solution;
• performing a hydrothermal method using the mixed solution so that the lithium-containing composite oxide expressed by the general formula LiMPO4 (M is one or more of Fe (II), Mn (II), Co (II), and Ni (II)) is formed;
• and
• forming a positive electrode using the lithium-containing composite oxide.

A method for manufacturing an electrode, comprising:

• forming a first solution in which a lithium compound is dissolved;
• forming a second solution in which a phosphorus compound is dissolved;
• forming a third solution in which one or more of an iron (II) compound, a manganese (II) compound, a cobalt (II) compound, and a nickel (II) compound are dissolved;
• forming a first mixed solution by mixing the first solution and the second solution, the first mixed solution being slightly alkaline;
• forming a second mixed solution by dripping the first mixed solution in the third solution while stirring the third solution;
• forming single crystal particles of a lithium-containing composite oxide by heating the second mixed solution using a hydrothermal method;
• and
• forming a positive electrode using the lithium-containing composite oxide.