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公开(公告)号：US10756342B2
公开(公告)日：2020-08-25
申请号：US14966386
申请日：2015-12-11
发明人： Sohei Suga , Koichi Shinohara , Kenji Ohara , Toshihiro Horiuchi , Masanori Aoyagi , Junko Nishiyama
IPC分类号： H01M4/505 , H01M4/36 , H01M4/525 , H01M4/587 , H01M10/0525
摘要： A lithium ion secondary battery includes: a negative electrode having a carbon-based negative electrode material containing graphite particles and amorphous carbon particles; and a positive electrode including a lithium composite oxide. The lithium composite oxide is represented by a general formula: LixNiyMnzCo(1-y-z)O2, where x is a numeral of 1 or more and 1.2 or less, and y and z are positive numerals satisfying the relation of y+z
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公开(公告)号：US10714787B2
公开(公告)日：2020-07-14
申请号：US15045316
申请日：2016-02-17
发明人： Sohei Suga , Koichi Shinohara , Kenji Ohara , Toshihiro Horiuchi , Masanori Aoyagi , Junko Nishiyama
IPC分类号： H01M10/0525 , H01M2/30 , H01M4/505 , H01M4/525 , H01M4/587 , H01M10/0585 , H01M4/02
摘要： Provided is a lithium ion secondary battery including a power generating element that includes at least one positive electrode plate, at least one negative electrode plate, and at least one separator. A ratio B/A (mΩcm) of volume resistivity B (mΩcm3) of the power generating element to an area A (cm2) per one positive electrode plate is 0.4 or more and less than 0.9.
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公开(公告)号：US10468729B2
公开(公告)日：2019-11-05
申请号：US15109923
申请日：2014-12-08
IPC分类号： H01M10/44 , H01M10/052 , H01M10/0567 , H01M10/058 , H01M2/16 , H01M4/04 , H01M4/131 , H01M4/133 , H01M4/1391 , H01M4/1393 , H01M4/505 , H01M4/525 , H01M4/62 , H01M4/66 , H01M10/0525 , H01M10/0568 , H01M10/0569 , H01M10/0585 , H01M10/42 , H01M10/04 , H01M4/02 , H01M10/52
摘要： A method for producing a non-aqueous electrolyte secondary battery including an electrolyte containing an electrolyte salt, a non-aqueous solvent capable of dissolving the electrolyte salt, and plural additives, wherein at least one of the additives has a reduction potential that is nobler than the reduction potential of the non-aqueous solvent. The method includes a first charging step for maintaining battery voltage at a negative electrode potential at which the additive having the noblest reduction potential of the additives is decomposed while the non-aqueous solvent and other additives are not reduced and decomposed and a second charging step for maintaining battery voltage so as to have reduction and decomposition of at least one of the non-aqueous solvents and bring the electrical potential of the negative electrode to at least 0.7 V relative to lithium. By having a uniform reaction in an electrode, a decrease in durability is suppressed.
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