Lithium ion secondary battery

A method of manufacturing a lithium ion secondary battery, comprising the steps of:

• forming a positive electrode comprising lithium ion generating substance;
• forming a negative electrode;
• forming a heat-resistant and heat-insulating film having pores and formed on at least one of surfaces opposed to each other of said positive and negative electrodes, wherein said heat-resistant and heat-insulating film is formed by spraying powders made of at least one material selected from the group consisting of metal oxide, metal carbonate and metal nitride;
• and
• laminating said positive and negative electrodes through a separator.

A lithium ion secondary battery comprising:

• a positive electrode comprising lithium ion generating substance;
• a negative electrode;
• a separator;
• and
• a heat-resistant and heat-insulating film formed on at least one of surfaces, which are not opposed to each other, of said positive and negative electrodes, wherein said positive electrode and said negative electrode are laminated through said separator, wherein said heat-resistant and heat-insulating film contains at least one material selected from the group consisting of metal oxide, metal carbonate or metal nitride.

A method of manufacturing a lithium ion secondary battery, comprising the steps of:

• forming a positive electrode comprising lithium ion generating substance;
• forming a negative electrode;
• forming a heat-resistant and heat-insulating film having pores and formed on at least one of surfaces, which are not opposed to each other, of said positive and negative electrodes, wherein said heat-resistant and heat-insulating film is formed by spraying powders of metal oxide, metal carbonate or metal nitride;
• and
• laminating said positive and negative electrodes through a separator.

A method of manufacturing a lithium ion secondary battery comprising the following steps:

• providing a positive electrode collector comprising two opposing surfaces,
• coating at least one the positive electrode collector surfaces with a positive electrode mixture comprising a lithium ion generating substance,
• coating the other of the positive electrode collector surfaces with a heat-resistant and heat-insulating film having pores, the heat-resistant and heat-insulating film comprising at least one material selected from the group consisting of metal oxide, metal carbonate and metal nitride,
• providing a negative electrode collector comprising two opposing surfaces,
• coating both surfaces of the negative electrode collector with a negative electrode mixture,
• laminating the positive and negative electrodes together with a separator.