Patent application number | Description | Published |
20110318655 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, NON-AQUEOUS ELECTROLYTE, AND METHOD FOR FABRICATNG NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - A non-aqueous electrolyte secondary battery is described, capable of inhibiting the raise of the internal resistance at a low temperature after use in a high-temperature circumstance, and having a good power performance at a low temperature. The non-aqueous electrolyte secondary battery has a non-aqueous electrolyte, and is characterized in containing a sulfate ester with a specific structure in an amount of 4.0 wt % or less relative to the total weight of the non-aqueous electrolyte. | 12-29-2011 |
20120064396 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND METHOD FOR FABRICATNG NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - A non-aqueous electrolyte secondary battery includes a positive electrode containing a positive-electrode active material, a negative electrode containing a negative-electrode active material, and a non-aqueous electrolyte, and is characterized in that the non-aqueous electrolyte contains 1.0 wt % or less of a compound represented by formula (1) and 2.0 wt % or less of a cyclic sulfate ester represented by formula (2), based on the total weight of the non-aqueous electrolyte. By using the non-aqueous electrolyte including a specified amount of the compound represented by formula (1) and a specified amount of the cyclic sulfate ester, when the battery is used at a low temperature after being stored at a high temperature, the increase of the internal resistance is inhibited. | 03-15-2012 |
20140212747 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR PRODUCING NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode and a nonaqueous electrolyte. The positive electrode includes Li | 07-31-2014 |
20140335426 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR PRODUCING NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. A positive electrode charge potential is 3.7 V or less with respect to a lithium metal potential. The nonaqueous electrolyte includes a cyclic disulfone compound having a specific structure in an amount of 0.1 to 4.0% by mass based on a total mass of the nonaqueous electrolyte. | 11-13-2014 |
20150229002 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR PRODUCING NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - Provided is a nonaqueous electrolyte secondary battery comprising a nonaqueous electrolyte. A lithium phosphate compound and a cyclic sulfone compound are contained in the nonaqueous electrolyte. The lithium phosphate compound is contained in an amount greater than 0% by mass and less than or equal to 4.0% by mass relative to the whole mass of the nonaqueous electrolyte. The cyclic sulfone compound is contained in an amount greater than 0% by mass and less than or equal to 3.0% by mass relative to the whole mass of the nonaqueous electrolyte. The lithium phosphate compound comprises lithium difluoro(bisoxalato) phosphate and lithium tetrafluoro(oxalato) phosphate. | 08-13-2015 |
20150270575 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR PRODUCING NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - A nonaqueous electrolyte secondary battery including a positive electrode having a positive active material, and an electrolyte, wherein a positive electrode potential at the time of charging is 3.7 V or less with respect to a lithium metal potential, and the electrolyte contains a cyclic sulfate compound having a specific structure. | 09-24-2015 |
20150280282 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR PRODUCING NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - A nonaqueous electrolyte secondary battery including a positive electrode having a particulate positive active material, and an electrolyte, wherein the positive active material contains a nickel-containing lithium transition metal oxide and has an average particle size of 3 to 15 μm, and the electrolyte contains a cyclic sulfate compound having a specific structure. | 10-01-2015 |
20160133991 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR PRODUCING NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - A non-aqueous electrolyte secondary battery comprises a positive electrode, a negative electrode, a separator and a non-aqueous electrolyte and an insulating layer is formed between the positive electrode and the negative electrode, wherein the non-aqueous electrolyte contains a cyclic sulfate compound having a specific structure or a cyclic disulfonate compound having a specific structure. | 05-12-2016 |