Sodium and potassium ion batteries with halogen salts

Patent metadata

Field	Value
Publication number	US-9455446-B2
Application number	US-201514827001-A
Country	US
Kind code	B2
Filing date	Aug 14, 2015
Priority date	Mar 28, 2012
Publication date	Sep 27, 2016
Grant date	Sep 27, 2016

Abstract

A sodium or potassium battery is provided, prior to an initial charge and discharge cycle, with a halogen salt additive. As is conventional, the battery is made up of the following components: an anode, a cathode, and an electrolyte. In addition, the battery includes a halogen salt (MX), where M is a metal and X is a halogen element. The halogen salt is added to the anode, the cathode, the electrolyte, or combinations thereof. The concentration MX with respect to the component(s) to which it is added is in the range of 0.01% to 10% in weight. The element X can be selected from the group of halogen elements listed in the Periodic Table. M is a material such as lithium, sodium, potassium, cesium, magnesium, calcium, barium, titanium, manganese, iron, cobalt, nickel, copper, zinc, ammonium, or combinations thereof. Advantageously, the electrolyte may be either aqueous or non-aqueous.

First claim

We claim:

1. A cathode with a halogen salt additive comprising:
a current collector;
a cathode active material capable of respectively releasing and hosting metal ions during charge and discharge cycling; and,
a halogen salt additive (MX) added to the cathode active material, where M is a metal and X is a halogen element.

2. The cathode of claim 1 wherein the cathode active material primarily comprises a material selected from a group consisting of hexacyanometallate, oxides, sulfides, nitrides, and combinations thereof.

3. The cathode of claim 1 wherein M is a material selected from a group consisting of lithium, sodium, potassium, cesium, magnesium, calcium, barium, titanium, manganese, iron, cobalt, nickel, copper, zinc, ammonium, and combinations thereof.

4. The cathode of claim 1 wherein the MX concentration with respect to active cathode material is in a range of 0.01% to 10% in weight.

Assignees

• Sharp Laboratories America Inc

Inventors

• Lu Yuhao
• Vail Sean
• Zhao Xin
• Song Jie

Classifications

• H01M4/58

  of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates · CPC title

• H01M4/0452

  from solutions · CPC title

• Y02E60/122

  Cross-Sectional Technologies · mapped topic

• H01M4/0471

  involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis · CPC title

• H01M10/052

  Li-accumulators · CPC title