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

Patent metadata

Field	Value
Publication number	US-2016285076-A1
Application number	US-201314442289-A
Country	US
Kind code	A1
Filing date	Nov 19, 2013
Priority date	Nov 22, 2012
Publication date	Sep 29, 2016
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 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 Zn y M z A a (in the formula (1) M is at least one metal selected from the group consisting of V, Sn, Al, C and combinations thereof, A is inevitable impurity, and x, y, z and a represent mass percent values and satisfy 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 .- 27 . (canceled)

28 . 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 Zn 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 33≦x≦50, 0<y≦46.21≦z≦67, 0≦a<0.5 and x+y+z+a=100, and elongation (δ) of the electrode layer is 1.29<δ<1.70%.

29 . The negative electrode for an electrical device according to claim 28 ,
wherein x is 33 to 47, y is 11 to 27, and z is 33 to 56.

30 . 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 Zn y M z A a   (1)

in the formula (1) M is Sn, A is inevitable impurity, and x, y, z and a represent mass percent values and satisfy 23<x<64, 0<y<65, 4≦z≦34, 0≦a<0.5 and x+y+z+a=100, and elongation (δ) of the electrode layer is 1.29<δ<1.70%.

31 . 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 Zn y M z A a   (1)

in the formula (1) M is Sn, A is inevitable impurity, and x, y, z and a represent mass percent values and satisfy 23<x<44, 0<y<65, 34≦z≦58, 0≦a<0.5 and x+y+z+a=100, and elongation (δ) of the electrode layer is 1.29<δ<1.70%.

32 . The negative electrode for an electrical device according to claim 30 ,
wherein y is more than 27 to less than 61.

33 . The negative electrode for an electrical device according to claim 31 ,
wherein x is less than 34.

34 . The negative electrode for an electrical device according to claim 32 ,
wherein y is more than 38, and z is less than 24.

35 . The negative electrode for an electrical device according to claim 32 , wherein x is 24 or more to less than 38.

36 . The negative electrode for an electrical device according to claim 31 , wherein x is less than 38, y is more than 27, and z is less than 40.

37 . The negative electrode for an electrical device according to claim 31 , wherein x is less than 29, and z is 40 or more.

38 . The negative electrode for an electrical device according to claim 28 , wherein δ is 1.40≦δ<1.70%.

39 . The negative electrode for an electrical device according to claim 38 , wherein δ is 1.40≦δ≦1.66%.

40 . The negative electrode for an electrical device according to claim 39 , wherein δ is 1.40<δ<1.57%.

41 . The negative electrode for an electrical device according to claim 40 , wherein δ is 1.47≦δ≦1.57%.

42 . The negative electrode for an electrical device according to claim 41 , wherein δ is 1.53≦δ≦1.57%.

43 . The negative electrode for an electrical device according to claim 28 , wherein the binder contains resin with an E elastic modulus from more than 1.00 GPa to less than 7.40 GPa.

44 . The negative electrode for an electrical device according to claim 28 , wherein elastic elongation of the current collector is 1.30% or more.

45 . The negative electrode for an electrical device according to claim 28 , wherein the negative electrode active material is a mixture of the alloy represented by the formula (1) and a carbon-based material with each other.

46 . An electrical device comprising the negative electrode for an electrical device according to claim 28 .

Assignees

• Nissan Motor

Inventors

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

Classifications

• C22C13/00 Primary

  Alloys based on tin · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M4/624

  Electric conductive fillers · CPC title

• H01M4/386

  Silicon or alloys based on silicon · CPC title

• H01M4/134 Primary

  Electrodes based on metals, Si or alloys · CPC title