公开(公告)号：US20160099486A1

公开(公告)日：2016-04-07

申请号：US14889718

申请日：2014-05-09

Applicant: NEC Corporation

Inventor： Takehiro NOGUCHI ,  Yuukou KATOU ,  Hideaki SASAKI ,  Makiko TAKAHASHI ,  Emiko FUJII

IPC: H01M10/0569 ,  H01M10/04 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525

CPC classification number: H01M10/0569 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/049 ,  H01M10/052 ,  H01M10/0567 ,  H01M10/058 ,  H01M2300/0034

Abstract: The present invention relates to a secondary battery electrolyte, which contains a first fluorine-containing ether compound, a second fluorine-containing ether compound, and at least one selected from fluorine-containing phosphate ester compounds and sulfone compounds, wherein the fluorine substitution rate of the first fluorine-containing ether compound is lower than that of the second fluorine-containing ether compound, and the content of the first fluorine-containing ether compound is higher than that of the second fluorine-containing ether compound. According to the present invention, with respect to batteries operating at a high voltage, and batteries supposed to be used at a high temperature for a long period, there can be provided a lithium secondary battery suppressed in the decomposition reaction of the electrolyte and improved in the life characteristics.

Abstract translation: 本发明涉及含有第一含氟醚化合物，第二含氟醚化合物和选自含氟磷酸酯化合物和砜化合物中的至少一种的二次电池电解质，其中氟取代率 第一含氟醚化合物的含量低于第二含氟醚化合物，第一含氟醚化合物的含量比第二含氟醚化合物的含量高。 根据本发明，对于高电压工作的电池和长时间在高温下使用的电池，可以提供抑制电解质的分解反应的锂二次电池， 生活特点。

公开(公告)号：US20160285091A1

公开(公告)日：2016-09-29

申请号：US14442141

申请日：2013-10-28

Applicant: NEC CORPORATION

Inventor： Jiro IRIYAMA ,  Daisuke KAWASAKI ,  Emiko FUJII ,  Shin SERIZAWA ,  Hiroo TAKAHASHI

IPC: H01M4/485 ,  H01M4/04 ,  H01M10/0525

CPC classification number: H01M4/485 ,  H01M4/0445 ,  H01M4/0459 ,  H01M4/1391 ,  H01M10/0525 ,  H01M2004/027

Abstract: A negative electrode active material comprising silicon oxide satisfying the following Equation 1 and Equation 2 when solid state NMR (29Si-DDMAS) of silicon is measured for the silicon oxide after performing charging at least once is excellent in the performance as a negative electrode active material for a lithium secondary battery; 0.42≦S1/(S1+S2+S3)≦0.55  (Equation 1) 0.21≦S3/(S1+S2+S3)≦0.26,  (Equation 2) in which S1 is a sum of peak areas of a group of signals assigned to Si having a Si—Si bond and having peaks at 0 to −15 ppm, −55 ppm, −84 ppm and −88 ppm, S2 is a sum of peak areas of a group of signals assigned to Si having a Si(OH)4-n(OSi)n (n=3, 4) structure and having peaks at −100 ppm and −120 ppm, and S3 is a sum of peak areas of a group of signals assigned to Si having a Si(OLi)4-n(OSi)n (n=0, 1, 2, 3) structure and having peaks at −66 ppm, −74 ppm, −85 ppm and −96 ppm.

Abstract translation: 其中S1是分配给具有Si-Si键的Si并且在0至-15ppm，-55ppm，-84ppm和-88ppm具有峰值的一组信号的峰值面积之和，S2是 分配给具有Si（OH）4-n（OSi）n（n = 3,4）结构并在-100ppm和-120ppm具有峰值的Si的一组信号的峰值面积，S3是峰值 分配给具有Si（OLi）4-n（OSi）n（n = 0,1,2,3）结构并具有在-66ppm，-74ppm，-85ppm的峰和 -96ppm。