Carbon material for negative electrode of non-aqueous secondary battery, negative electrode for non-aqueous secondary battery, and non-aqueous secondary battery

Patent metadata

Field	Value
Publication number	US-2016276668-A1
Application number	US-201615166914-A
Country	US
Kind code	A1
Filing date	May 27, 2016
Priority date	Nov 27, 2013
Publication date	Sep 22, 2016
Grant date	—

Abstract

An object of the present invention is to provide a carbon material for negative electrodes of non-aqueous secondary batteries having a high capacity, a high output, excellent cycle characteristics and a low irreversible capacity.
The present invention relates to a carbon material for negative electrodes of non-aqueous secondary batteries, the carbon material comprising: (1) a composite carbon particles (A) containing elemental silicon, and (2) amorphous composite graphite particles (B) in which graphite particles (C) and amorphous carbon are composited.

First claim

1 .- 9 . (canceled)

10 . A carbon material for a negative electrode of a non-aqueous secondary battery, the carbon material comprising:
(1) composite carbon particles (A) containing elemental silicon, and (2) amorphous composite graphite particles (B) in which graphite particles (C) and amorphous carbon are composited.

11 . The carbon material for a negative electrode of a non-aqueous secondary battery according to claim 10 , the carbon material further comprising natural graphite particles (D).

12 . The carbon material for a negative electrode of a non-aqueous secondary battery according to claim 10 , wherein the graphite particles (C) are spheroidized natural graphite.

13 . The carbon material for a negative electrode of a non-aqueous secondary battery according to claim 11 , wherein the graphite particles (C) are spheroidized natural graphite.

14 . The carbon material for a negative electrode of a non-aqueous secondary battery according to claim 10 , wherein a Raman R value of the graphite particles (B) is 0.2 or greater but 0.6 or less, when the Raman R value is defined as an intensity ratio, I B /I A , of an intensity I B of a maximum peak P B around 1360 cm −1 to an intensity I A of a maximum peak P A around 1580 cm −1 in a Raman spectrum.

15 . The carbon material for a negative electrode of a non-aqueous secondary battery according to claim 11 , wherein a Raman R value of the graphite particles (B) is 0.2 or greater but 0.6 or less, when the Raman R value is defined as an intensity ratio, I B /I A , of an intensity I B of a maximum peak P B around 1360 cm −1 to an intensity I A of a maximum peak P A around 1580 cm −1 in a Raman spectrum.

16 . The carbon material for a negative electrode of a non-aqueous secondary battery according to claim 12 , wherein a Raman R value of the graphite particles (B) is 0.2 or greater but 0.6 or less, when the Raman R value is defined as an intensity ratio, I B /I A , of an intensity I B of a maximum peak P B around 1360 cm −1 to an intensity I A of a maximum peak P A around 1580 cm −1 in a Raman spectrum.

17 . The carbon material for a negative electrode of a non-aqueous secondary battery according to claim 13 , wherein a Raman R value of the graphite particles (B) is 0.2 or greater but 0.6 or less, when the Raman R value is defined as an intensity ratio, I B /I A , of an intensity I B of a maximum peak P B around 1360 cm −1 to an intensity I A of a maximum peak P A around 1580 cm −1 in a Raman spectrum.

18 . The carbon material for a negative electrode of a non-aqueous secondary battery according to claim 10 , wherein the composite carbon particles (A) are the composite carbon particles containing at least one type of Si compound selected from the group consisting of Si and SiOx (0<x<2).

19 . The carbon material for a negative electrode of a non-aqueous secondary battery according to claim 11 , wherein the composite carbon particles (A) are the composite carbon particles containing at least one type of Si compound selected from the group consisting of Si and SiOx (0<x<2).

20 . The carbon material for a negative electrode of a non-aqueous secondary battery according to claim 12 , wherein the composite carbon particles (A) are the composite carbon particles containing at least one type of Si compound selected from the group consisting of Si and SiOx (0<x<2).

21 . The carbon material for a negative electrode of a non-aqueous secondary battery according to claim 13 , wherein the composite carbon particles (A) are the composite carbon particles containing at least one type of Si compound selected from the group consisting of Si and SiOx (0<x<2).

22 . The carbon material for a negative electrode of a non-aqueous secondary battery according to claim 14 , wherein the composite carbon particles (A) are the composite carbon particles containing at least one type of Si compound selected from the group consisting of Si and SiOx (0<x<2).

23 . The carbon material for a negative electrode of a non-aqueous secondary battery according to claim 15 , wherein the composite carbon particles (A) are the composite carbon particles containing at least one type of Si compound selected from the group consisting of Si and SiOx (0<x<2).

24 . The carbon material for a negative electrode of a non-aqueous secondary battery according to claim 16 , wherein the composite carbon particles (A) are the composite carbon particles containing at least one type of Si compound selected from the group consisting of Si and SiOx (0<x<2).

25 . The carbon material for a negative electrode of a non-aqueous secondary battery according to claim 17 , wherein the composite carbon particles (A) are the composite carbon particles containing at least one type of Si compound selected from the group consisting of Si and SiOx (0<x<2).

26 . The carbon material for a negative electrode of a non-aqueous secondary battery according to claim 18 , wherein the composite carbon particles (A) have a structure that flake graphite is folded and particles of the Si compound are present within a void of the folded structure.

27 . The carbon material for a negative electrode of a non-aqueous secondary battery according to claim 10 , wherein a mass proportion of the amorphous composite graphite particles (B) in the carbon material for a negative electrode of a non-aqueous secondary battery is 10% by mass or greater but 70% by mass or less.

28 . A negative electrode for a non-aqueous secondary battery comprising a current collector and an active material layer formed on the current collector, wherein the active material layer contains the carbon material for a negative electrode of a non-aqueous secondary battery according to claim 10 .

29 . A non-aqueous secondary battery comprising a positive electrode and a negative electrode, and an electrolyte, wherein the negative electrode is the negative electrode for a non-aqueous secondary battery according to claim 28 .

Assignees

• Mitsubishi Chem Corp

Inventors

• Nagayama Daigo
• Fuse Tooru
• Kondo Hisako

Classifications

• H01M4/13

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• H01M4/133

  Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title

• H01M10/0525

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

• H01M4/587 Primary

  for inserting or intercalating light metals · CPC title

• H01M4/483

  for non-aqueous cells (H01M4/485 takes precedence) · CPC title