Negative electrode for electrical device, and electrical device using the same

Patent metadata

Field	Value
Publication number	US-2015303450-A1
Application number	US-201314443151-A
Country	US
Kind code	A1
Filing date	Nov 19, 2013
Priority date	Nov 22, 2012
Publication date	Oct 22, 2015
Grant date	—

Abstract

A negative electrode for an electrical device includes: a current collector, and an electrode layer containing a negative electrode active material, an electrically-conductive auxiliary agent and a binder, wherein the negative electrode active material contains an alloy represented by a following formula (1): Si x Sn y M z A a (where M is at least one metal selected from the group consisting of Al, V, C and combinations thereof, A is inevitable impurity, and x, y, z and a are values of mass %, where 0<x<100, 0<y<100, 0<z<100, 0≦a<0.5 and x+y+z+a=100), and elongation (δ) of the electrode layer is 1.29<δ<1.70%.

First claim

1 .- 23 . (canceled)

24 . A negative electrode for an electrical device, comprising:
a current collector; and an electrode layer containing a negative electrode active material, an electrically-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 a following formula (1):
Si x Sn y M z A a   (1)

in the formula (1), M is Al, A is inevitable impurity, and x, y, z and a represent mass percent values and satisfy wherein x is 31 or more to 50 or less, y is more than 0 to 45 or less, and z is more than 0 to 43 or less, 0≦a<0.5 and x+y+z+a=100, elongation (δ) of the electrode layer is 1.29<δ<1.70%, and wherein the binder contains resin with an E elastic modulus from more than 1.00 GPa to less than 7.40 GPa.

25 . A negative electrode for an electrical device, comprising:
a current collector; and an electrode layer containing a negative electrode active material, an electrically-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 a following formula (1):
Si x Sn y M z A a   (1)

in the formula (1), M is V, A is inevitable impurity, and x, y, z and a represent mass percent values and satisfy x is 27 or more to less than 100, y is more than 0 to 73 or less, and z is more than 0 to 73 or less, 0≦a<0.5 and x+y+z+a=100, elongation (δ) of the electrode layer is 1.29<δ<1.70%, and wherein the binder contains resin with an E elastic modulus from more than 1.00 GPa to less than 7.40 GPa.

26 . A negative electrode for an electrical device, comprising:
a current collector; and an electrode layer containing a negative electrode active material, an electrically-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 a following formula (1):
Si x Sn y M z A a   (1)

in the formula (1), M is C, A is inevitable impurity, and x, y, z and a represent mass percent values and satisfy 29≦x<100, 0<y<100, 0<z<100, 0≦a<0.5 and x+y+z+a=100, and elongation (δ) of the electrode layer is 1.29<δ<1.70%, and wherein the binder contains resin with an E elastic modulus from more than 1.00 GPa to less than 7.40 GPa.

27 . The negative electrode for an electrical device according to claim 24 , wherein δ is 1.40≦δ<1.70%.

28 . The negative electrode for an electrical device according to claim 24 , wherein δ is 1.40≦δ≦1.66%.

29 . The negative electrode for an electrical device according to claim 24 , wherein δ is 1.40≦δ≦1.57%.

30 . The negative electrode for an electrical device according to claim 24 , wherein δ is 1.47≦δ≦1.57%.

31 . The negative electrode for an electrical device according to claim 24 , wherein δ is 1.53≦δ≦1.57%.

32 . The negative electrode for an electrical device according to claim 24 , wherein elastic elongation of the current collector is 1.30% or more.

33 . The negative electrode for an electrical device according to claim 24 , wherein the negative electrode active material is composed by mixing the alloy represented by the formula (1) and a carbon-based material with each other.

34 . The negative electrode for an electrical device according to claim 24 , wherein y is 15 or more, and z is 18 or more.

35 . The negative electrode for an electrical device according to claim 25 , wherein x is 84 or less, y is 10 or more to 73 or less, and z is 6 or more to 73 or less.

36 . The negative electrode for an electrical device according to claim 35 , wherein y is 10 or more to 63 or less, and z is 6 or more to 63 or less.

37 . The negative electrode for an electrical device according to claim 36 , wherein x is 52 or less.

38 . The negative electrode for an electrical device according to claim 37 , wherein y is 40 or less, and z is 20 or more.

39 . The negative electrode for an electrical device according to claim 26 , wherein x is 63 or less, y is 14 or more to 48 or less, and z is 11 or more to 48 or less.

40 . The negative electrode for an electrical device according to claim 39 , wherein x is 44 or less.

41 . The negative electrode for an electrical device according to claim 40 , wherein x is 40 or less, and y is 34 or more.

42 . An electrical device comprising the negative electrode for an electrical device according to claim 24 .

Assignees

• Nissan Motor

Inventors

• Miki Fumihiro
• Watanabe Manabu
• Yamamoto Kensuke
• Sanada Takashi
• Chiba Nobutaka

Classifications

• H01M4/387

  Tin or alloys based on tin · CPC title

• H01M4/386

  Silicon or alloys based on silicon · CPC title

• H01M4/587

  for inserting or intercalating light metals · CPC title

• H01M4/134 Primary

  Electrodes based on metals, Si or alloys · CPC title

• H01G11/32

  Carbon-based · CPC title