Method for preparing cathode material for lithium primary battery, cathode material for lithium primary battery, and lithium primary battery

Patent metadata

Field	Value
Publication number	US-10790507-B2
Application number	US-201815950168-A
Country	US
Kind code	B2
Filing date	Apr 11, 2018
Priority date	Apr 12, 2017
Publication date	Sep 29, 2020
Grant date	Sep 29, 2020

Abstract

A method for preparing cathode material for a lithium primary battery includes an active cathode material and an active anode material. The active cathode material is manganese dioxide, and the active anode material is either one of lithium metal and lithium alloy. The method includes: a first kneading step in which a boron compound and a thickening agent are kneaded with a diluent to prepare a paste made by dissolving the boron compound in the diluent; a second kneading step in which the paste is kneaded with a conductive additive; and a third kneading step in which the paste obtained in the second kneading step is kneaded with the active cathode material and a binder to prepare the cathode material in slurry form.

First claim

What is claimed is:

1. A method for preparing cathode material for a lithium primary battery,
the lithium primary battery including an active cathode material and an active anode material,
the active cathode material being manganese dioxide,
the active anode material being either one of lithium metal and lithium alloy,
the method comprising:
a first kneading step, in which boron trioxide (B 2 O 3 ) and a thickening agent are kneaded with a diluent to prepare a paste made by dissolving the boron trioxide (B 2 O 3 ) in the diluent;
a second kneading step, in which the paste obtained in the first kneading step is further kneaded with carbon black; and
a third kneading step, in which the paste obtained in the second kneading step is further kneaded with the active cathode material and a binder to prepare the cathode material in slurry form,
wherein the cathode material obtained in the third kneading step contains at least 0.3 wt % and not more than 0.4 wt % of the boron trioxide (B 2 O 3 ).

Assignees

• Fdk Corp

Inventors

• Ochiai Yuki
• Nishimura Naoaki
• Hirata Daisuke
• Yanagi Hiroshi

Classifications

• H01M4/64

  Carriers or collectors · CPC title

• H01M4/623

  fluorinated polymers · CPC title

• H01M4/502 Primary

  for non-aqueous cells (H01M4/505 takes precedence) · CPC title

• H01M6/16

  with organic electrolyte (H01M6/18 takes precedence) · CPC title

• H01M4/405

  Alloys based on lithium · CPC title