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-2018301701-A1
Application number	US-201815950168-A
Country	US
Kind code	A1
Filing date	Apr 11, 2018
Priority date	Apr 12, 2017
Publication date	Oct 18, 2018
Grant date	—

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 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.

2 . The method for preparing cathode material for a lithium primary battery according to claim 1 , wherein
an amount of the boron compound added in the first kneading step is determined so that the cathode material slurry obtained in the third kneading step contains at least 0.3 wt % and not more than 0.4 wt % of the boron compound.

3 . A cathode material prepared by the method for preparing cathode material for a lithium primary battery according to claim 1 , wherein
the cathode material comprises: an electrode active material composed of manganese dioxide; a thickening agent; a conductive additive; a binder; and a boron compound, wherein the cathode material is in slurry form, and the boron compound is dissolved.

4 . A cathode material prepared by the method for preparing cathode material for a lithium primary battery according to claim 2 , wherein
the cathode material comprises: an electrode active material composed of manganese dioxide; a thickening agent; a conductive additive; a binder; and a boron compound, wherein the cathode material is in slurry form, and the boron compound is dissolved.

5 . A lithium primary battery, comprising:
an electrode assembly including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode, the positive electrode formed by applying onto a sheet-shaped current collector the cathode material for a lithium primary battery according to claim 3 , the negative electrode formed by arranging on a sheet-shaped current collector either one of plate-shaped lithium metal and lithium alloy; and a jacket in which the electrode assembly is sealed together with a non-aqueous electrolyte.

6 . A lithium primary battery, comprising:
an electrode assembly including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode, the positive electrode formed by applying onto a sheet-shaped current collector the cathode material for a lithium primary battery according to claim 4 , the negative electrode formed by placing on a sheet-shaped current collector either one of plate-shaped lithium metal and lithium alloy; and a jacket in which the electrode assembly is sealed together with a non-aqueous electrolyte.

Assignees

• Fdk Corp

Inventors

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

Classifications

• H01M4/08

  Processes of manufacture · CPC title

• H01M4/625

  Carbon or graphite · CPC title

• H01M4/0404

  by coating on electrode collectors · CPC title

• H01M6/16

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

• H01M4/382

  Lithium (H01M4/405 takes precedence) · CPC title