Electrode for lithium ion secondary battery and lithium ion secondary battery using the same

Patent metadata

Field	Value
Publication number	US-2019280300-A1
Application number	US-201716345490-A
Country	US
Kind code	A1
Filing date	Oct 25, 2017
Priority date	Oct 28, 2016
Publication date	Sep 12, 2019
Grant date	—

Abstract

An electrode for lithium ion secondary batteries, including a porous glass particle and a positive electrode active material or negative electrode active material that is capable of occluding and releasing lithium ions wherein the pore volume of the porous glass particle is from 0.1 ml/g to 2 ml/g, is used to provide a lithium ion secondary battery excellent in a charge rate property.

First claim

1 . An electrode for a lithium ion secondary battery, comprising:
a porous glass particle and an electrode active material that is capable of occluding and releasing lithium ions, wherein the pore volume of the porous glass particle is from 0.1 ml/g to 2 ml/g.

2 . The electrode for a lithium ion secondary battery according to claim 1 , wherein the electrode is a positive electrode comprising at least one positive electrode active material selected from the group consisting of LiMnO 2 , LiMn 2 O 4 , LiCoO 2 , LiNiO 2 , LiNi x Co y Mn z O 2 (x+y+z=1, 0<x<1, 0<y<1, 0<z<1) and LiNi x Co y Al z O 2 (x+y+z=1) as the electrode active material.

3 . The electrode for a lithium ion secondary battery according to claim 2 , wherein the load amount of an active material layer in the positive electrode is 100 g/m 2 or more.

4 . The electrode for a lithium ion secondary battery according to claim 1 , wherein the electrode is a negative electrode comprising at least one negative electrode active material selected from the group consisting of graphite, heat-treated graphite, carbon black and hard carbon.

5 . The electrode for a lithium ion secondary battery according to claim 4 , wherein the load amount of an active material layer in the negative electrode is 60 g/m 2 or more.

6 . The electrode for a lithium ion secondary battery according to claim 1 , wherein the average particle diameter of the porous glass particle is 0.2 to 30 μm.

7 . The electrode for a lithium ion secondary battery according claim 1 , wherein the addition amount of the porous glass particle is 0.2 to 10% by mass based on the total mass of the electrode active material.

8 . A lithium ion secondary battery comprising:
a positive electrode containing a positive electrode active material capable of occluding and releasing lithium ions; a negative electrode containing a negative electrode active material capable of occluding and releasing lithium ions; and a nonaqueous electrolytic solution, wherein at least one of the positive electrode and negative electrode is an electrode comprising a porous glass particle and an electrode active material that is capable of occluding and releasing lithium ions, wherein the pore volume of the porous glass particle is from 0.1 ml/g to 2 ml/g.

9 . The lithium ion secondary battery according to claim 8 , wherein an electrolyte salt of the nonaqueous electrolytic solution comprises lithium hexafluorophosphate and lithiumbis(fluorosulfonyl)imide.

10 . The lithium ion secondary battery according to claim 8 , wherein the nonaqueous electrolytic solution further contains lithium difluorophosphate.

11 . The lithium ion secondary battery according to claim 8 , wherein the electrode comprising the porous glass particle and the electrode active material is the positive electrode comprising at least one positive electrode active material selected from the group consisting of LiMnO 2 , LiMn 2 O 4 , LiCoO 2 , LiNiO 2 , LiNi x Co y Mn z O 2 (x+y+z=1, 0<x<1, 0<y<1, 0<z<1) and LiNi x Co y Al z O 2 (x+y+z=1) as the electrode active material.

12 . The lithium ion secondary battery according to claim 11 , wherein the load amount of an active material layer in the positive electrode is 100 g/m 2 or more.

13 . The lithium ion secondary battery according to claim 8 , wherein the electrode comprising the porous glass particle and the electrode active material is the negative electrode comprising at least one negative electrode active material selected from the group consisting of graphite, heat-treated graphite, carbon black and hard carbon.

14 . The lithium ion secondary battery according to claim 13 , wherein the load amount of an active material layer in the negative electrode is 60 g/m 2 or more.

15 . The lithium ion secondary battery according to claim 8 , wherein the average particle diameter of the porous glass particle is 0.2 to 30 μm.

16 . The lithium ion secondary battery according to claim 8 , wherein the addition amount of the porous glass particle is 0.2 to 10% by mass based on the total mass of the electrode active material.

Assignees

• Nec Corp

Inventors

• Maeda Katsumi
• Tamura Noriyuki
• Shiba Mika

Classifications

• H01M10/0525

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

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title

• H01M4/131 Primary

  Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• H01M10/0568

  characterised by the solutes · CPC title

• H01M4/587

  for inserting or intercalating light metals · CPC title