Non-aqueous electrolyte storage element

Patent metadata

Field	Value
Publication number	US-2017365852-A1
Application number	US-201715611261-A
Country	US
Kind code	A1
Filing date	Jun 1, 2017
Priority date	Jun 15, 2016
Publication date	Dec 21, 2017
Grant date	—

Abstract

To provide a non-aqueous electrolyte storage element including a positive electrode including a positive-electrode active material capable of inserting and eliminating anions, a negative electrode including a negative-electrode active material, and a non-aqueous electrolyte, wherein the positive-electrode active material includes a carbon material which has a plurality of pores constituting a three-dimensional network structure and has a solid electrolyte interface (SEI) material on a surface of the carbon material.

First claim

What is claimed is:

1 . A non-aqueous electrolyte storage element comprising:
a positive electrode including a positive-electrode active material capable of inserting and eliminating anions; a negative electrode including a negative-electrode active material; and a non-aqueous electrolyte, wherein the positive-electrode active material includes a carbon material which has a plurality of pores constituting a three-dimensional network structure and has a solid electrolyte interface (SEI) material on a surface of the carbon material.

2 . The non-aqueous electrolyte storage element according to claim 1 ,
wherein the solid electrolyte interface (SEI) material includes lithium fluoride.

3 . The non-aqueous electrolyte storage element according to claim 1 ,
wherein the positive electrode has a peak in a range of 885 eV or greater but 887 eV or less, when the positive electrode is measured by X-ray photoelectron spectroscopy (XPS).

4 . The non-aqueous electrolyte storage element according to claim 1 ,
wherein a solid electrolyte interface (SEI) ratio of a surface of the positive electrode is 58% or lower.

5 . The nonaqueous electrolyte storage element according to claim 1 .
wherein a solid electrolyte interface (SEI) ratio of a surface of the positive electrode is 13% or greater but 58% or less.

6 . The non-aqueous electrolyte storage element according to claim 1 ,
wherein a BET specific surface area of the carbon material is 50 m 2 /g or greater, and a pore volume of the carbon material is 0.2 mL/g or greater but 2.3 mL/g or less.

7 . The non-aqueous electrolyte storage element according to claim 1 ,
wherein the non-aqueous electrolyte includes LiPF 6 , or LiBF 4 , or both.

8 . The non-aqueous electrolyte storage element according to claim 1 ,
wherein the negative-electrode active material includes a carbonaceous material, or lithium titanate, or both.

9 . The non-aqueous electrolyte storage element according to claim 1 , further comprising a separator between the positive electrode and the negative electrode.

Assignees

• Araki Yuka
• Abe Naoto
• Itoh Yoshio
• Dan Tatsuya
• Takeshita Shuhei
• Ricoh Co Ltd

Inventors

• Araki Yuka
• Abe Naoto
• Itoh Yoshio
• Dan Tatsuya
• Takeshita Shuhei

Classifications

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H01M4/485

  of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title

• H01M2004/028

  Positive electrodes · CPC title

• H01M4/587 Primary

  for inserting or intercalating light metals · CPC title

• H01M4/62

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title