公开(公告)号：US20160172663A1

公开(公告)日：2016-06-16

申请号：US14959702

申请日：2015-12-04

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hideyuki SAKA ,  Keiichi TAKAHASHI

IPC: H01M4/131 ,  H01M10/42 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/505

CPC classification number: H01M10/4235 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/028 ,  Y02T10/7011

Abstract: Provided is a non-aqueous electrolyte secondary battery combining high battery performance in normal use and endurance against overcharge. The non-aqueous electrolyte secondary battery comprises a positive electrode, a negative electrode, and a non-aqueous electrolyte. The positive electrode comprises a positive electrode active material 16. Positive electrode active material 16 is formed of a particulate lithium composite oxide 16c comprising at least lithium, nickel, cobalt, manganese and tungsten; and a nickel oxide layer 16s formed on the lithium composite oxide surface. With the non-lithium metals in lithium composite oxide 16c being 100% by mole, tungsten accounts for 0.05% by mole or greater, but 2% by mole or less. With lithium composite oxide 16c being 100 parts by mass, the nickel oxide content is 0.01 part by mass or greater, but 2 parts by mass or less.

Abstract translation: 提供一种非水电解质二次电池，其在正常使用中具有高电池性能和耐过充电。 非水电解质二次电池包括正极，负极和非水电解质。 正极包括正极活性物质16.正极活性物质16由至少包含锂，镍，钴，锰和钨的颗粒状锂复合氧化物16c形成; 以及形成在锂复合氧化物表面上的氧化镍层16s。 锂复合氧化物16c中的非锂金属为100摩尔％时，钨占0.05摩尔％以上，但为2摩尔％以下。 锂复合氧化物16c为100质量份时，氧化镍含量为0.01质量份以上，但为2质量份以下。

公开(公告)号：US20160006030A1

公开(公告)日：2016-01-07

申请号：US14761224

申请日：2014-01-22

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  SUMITOMO METAL MINING CO., LTD.

Inventor： Hideyuki SAKA ,  Shuhei ODA ,  Tetsutaro HAYASHI ,  Hiroyuki TOYA

IPC: H01M4/505 ,  H01M4/36 ,  H01M10/052 ,  H01M4/525 ,  H01M2/34

Abstract: A positive electrode active material for lithium secondary batteries disclosed herein comprises a lithium transition metal oxide of a layered structure, represented by formula Li1+αNixCoyMnzCaβMγO2 (where −0.05≦α≦0.2, x+y+z+β+γ≅1, 0.3≦x≦≦0.7, 0.1≦y≦0.4, 0.1≦z≦0.4, 0.0002≦β≦0.0025, 0.0002≦β+γ≦0.02, and in a case where γ>0, M is absent or represents one, two or more elements selected from the group consisting of Na, Mg, Al, Ti, V, Cr, Zr, Nb, Mo, Hf, Ta and W). The tap density of the positive electrode active material ranges from 1.8 to 2.5 g/cm3.

Abstract translation: 本文公开的锂二次电池用正极活性物质包含层状结构的锂过渡金属氧化物，由式Li1 +αNixCoyMnzCa＆bgr;MγO2（其中-0.05＆nlE;α＆nlE; 0.2，x + y + z +＆bgr; +γ ≅1，0.3＆nlE; x＆nlE;＆nlE; 0.7,0.1＆nlE; y＆nlE; 0.4,0.1＆amp; nlE; z＆nlE; 0.4,0.0002＆nlE;＆bgr;＆nlE; 0.0025,0.0002＆nlE;＆bgr; +γ＆nlE; 0.02， γ> 0，M不存在或表示选自Na，Mg，Al，Ti，V，Cr，Zr，Nb，Mo，Hf，Ta和W中的一种，两种或更多种元素）。 正极活性物质的振实密度为1.8〜2.5g / cm 3。