Negative electrode for electric device and electric device using the same

Patent metadata

Field	Value
Publication number	US-2016285088-A1
Application number	US-201314442678-A
Country	US
Kind code	A1
Filing date	Nov 19, 2013
Priority date	Nov 22, 2012
Publication date	Sep 29, 2016
Grant date	—

Abstract

The negative electrode for an electric device includes a current collector and an electrode layer containing a negative electrode active material, a conductive auxiliary agent and a binder and formed on a surface of the current collector, wherein the negative electrode active material contains an alloy represented by the following formula (1): Si x Ti y M z A a (in the formula (1), M is at least one metal selected from the group consisting of Ge, Sn, Zn and a combination thereof, A is inevitable impurities, and x, y, z and a represent mass percent values and satisfy the conditions of 0<x<100, 0<y<100, 0<z<100, 0≦a<0.5, and x+y+z+a=100), and elastic elongation of the current collector is 1.30% or greater.

First claim

1 .- 18 . (canceled)

19 . A negative electrode for an electric device, comprising a current collector and an electrode layer containing a negative electrode active material, a conductive auxiliary agent and a binder and formed on a surface of the current collector,
wherein the negative electrode active material contains an alloy represented by the following formula (1):
Si x Ti y M z A a   (1)

in the formula (1), M is Sn, A is an inevitable impurity, and x, y, z and a represent mass percent values and satisfy the following mathematical formula (1) or (2);
35≦ x≦ 78, 0< y≦ 37, 7≦ z≦ 30  (1)

35≦ x≦ 52, 0< y≦ 35, 30≦ z≦ 51  (2)

and conditions of 0≦a<0.5 and x+y+z+a=100, and
elastic elongation of the current collector is 1.30% or greater.

20 . A negative electrode for an electric device, comprising a current collector and an electrode layer containing a negative electrode active material, a conductive auxiliary agent and a binder and formed on a surface of the current collector,
wherein the negative electrode active material contains an alloy represented by the following formula (1):
Si x Ti y M z A a   (1)

in the formula (1), M is Sn, A is an inevitable impurity, and x, y, z and a represent mass percent values and satisfy the following mathematical formula (3) or (4);
35≦ x≦ 78.7≦ y≦ 37.7≦ z≦ 30  (3)

35≦ x≦ 52, 7≦ y≦ 35, 30≦ z≦ 51  (4)

and conditions of 0≦a<0.5 and x+y+z+a=100, and
elastic elongation of the current collector is 1.30% or greater.

21 . A negative electrode for an electric device, comprising a current collector and an electrode layer containing a negative electrode active material, a conductive auxiliary agent and a binder and formed on a surface of the current collector,
wherein the negative electrode active material contains an alloy represented by the following formula (1):
Si x Ti y M z A a   (1)

in the formula (1), M is Sn, A is an inevitable impurity, and x, y, z and a represent mass percent values and satisfy the following mathematical formula (5) or (6);
35≦ x≦ 68, 18≦ y≦ 37, 7≦ z≦ 30  (5)

39≦ x≦ 52, 7≦ y≦ 20, 30≦ z≦ 1  (6)

and conditions of 0≦a<0.5 and x+y+z+a=100, and
elastic elongation of the current collector is 1.30% or greater.

22 . A negative electrode for an electric device, comprising a current collector and an electrode layer containing a negative electrode active material, a conductive auxiliary agent and a binder and formed on a surface of the current collector,
wherein the negative electrode active material contains an alloy represented by the following formula (1):
Si x Ti y M z A a   (1)

in the formula (1), M is Sn, A is an inevitable impurity, and x, y, z and a represent mass percent values and satisfy the following mathematical formula (7);
46≦ x≦ 58, 24≦ y≦ 37, 7≦ z≦ 21  (7)

and conditions of 0≦a<0.5 and x+y+z+a=100, and
elastic elongation of the current collector is 1.30% or greater.

23 . The negative electrode for an electric device according to claim 19 , wherein the elastic elongation of the current collector is 1.40% or greater.

24 . The negative electrode for an electric device according to claim 23 , wherein the elastic elongation of the current collector is 1.50% or greater.

25 . An electric device comprising the negative electrode for an electric device according to claim 19 .

Assignees

• Nissan Motor

Inventors

• Watanabe Manabu
• Miki Fumihiro
• Sanada Takashi
• Chiba Nobutake

Classifications

• C22C24/00

  Alloys based on an alkali or an alkaline earth metal · CPC title

• C22C28/00

  Alloys based on a metal not provided for in groups C22C5/00 - C22C27/00 · CPC title

• C22C30/04

  containing tin or lead · CPC title

• C22C30/06

  containing zinc · CPC title

• C22C29/18

  based on silicides · CPC title