Rapid charge lithium-ion battery

Patent metadata

Field	Value
Publication number	US-2016104880-A1
Application number	US-201514881254-A
Country	US
Kind code	A1
Filing date	Oct 13, 2015
Priority date	Oct 14, 2014
Publication date	Apr 14, 2016
Grant date	—

Abstract

A rapid charge lithium-ion battery comprises a positive plate, a negative plate, a separator disposed at intervals between the positive plate and the negative plate, and an electrolyte. The positive plate includes a positive current collector and a positive active material layer disposed on a surface of the positive current collector; the positive active material layer includes a positive active material, a positive conductive agent and a positive adhesive; the positive active material includes a component A and a component B; the component A is selected from at least one of lithium nickel cobalt aluminum oxide (NCA), lithium nickel cobalt manganese oxide (NCM), lithium manganese oxide (LMO) and lithium cobalt oxide (LiCoO 2 ); the component B is selected from at least one of lithium iron phosphate (LFP) and lithium titanium oxide (LTO); and the component B accounts for 5 to 90 percent by mass of the positive active material.

First claim

What is claimed is:

1 . A rapid charge lithium-ion battery, comprising a positive plate, a negative plate, a separator disposed at intervals between the positive plate and the negative plate, and an electrolyte, wherein
the positive plate includes a positive current collector and a positive active material layer disposed on a surface of the positive current collector; the positive active material layer comprises the following compositions in percentage by mass: 80 to 99 percent of positive active material; to 10 percent of positive conductive agent; and 0.1 to 10 percent of positive adhesive; the positive active material includes a component A and a component B; the component A is selected from at least one of lithium nickel cobalt aluminum oxide (NCA), lithium nickel cobalt manganese oxide (NCM), lithium manganese oxide (LMO) and lithium cobalt oxide (LiCoO2); the component B is selected from at least one of lithium iron phosphate (LFP) and lithium titanium oxide (LTO); and the component B accounts for 5 to 90 percent by mass of the positive active material.

2 . The rapid charge lithium-ion battery according to claim 1 , wherein the component A is doped with 0.1 to 1 percent by mass of metallic element which is selected from at least one of Mg, Zr, Ti, Zn, V and Cr.

3 . The rapid charge lithium-ion battery according to claim 1 , wherein the surface of the component A is coated with an oxide layer which is selected from at least one of Al2O3, ZrO2, Y2O3, MgO and TiO; and the ratio of the mass of the oxide layer to the mass of the component A is (0.1-2):100.

4 . The rapid charge lithium-ion battery according to claim 1 , wherein the external surface of LFP is coated with a carbon layer; and the ratio of the mass of the carbon layer to the mass of LFP is (0.1-2):100.

5 . The rapid charge lithium-ion battery according to claim 1 , wherein the negative plate includes a negative current collector and a negative active material layer disposed on a surface of the negative current collector; and the negative active material layer comprises the following compositions in percentage by mass:
80 to 97 percent of negative active material; 1 to 18 percent of negative conductive agent; 1 to 18 percent of negative adhesive; and 1 to 18 percent of negative stabilizer.

6 . The rapid charge lithium-ion battery according to claim 1 , wherein the negative active material is selected from at least one of artificial graphite, natural graphite, mesocarbon microbeads, soft carbon, hard carbon, silicon, silicon dioxide and tin alloy.

7 . The rapid charge lithium-ion battery according to claim 5 , wherein both the negative adhesive and the positive adhesive are selected from at least one of polyvinylidene fluoride (PVDF), styrene-butadiene rubber (SBR), sodium alginate (SA), polyvinyl alcohol (PVA) and polytetrafluoroethylene (PTFE).

8 . The rapid charge lithium-ion battery according to claim 5 , wherein the negative stabilizer is selected from at least one of sodium carboxymethyl cellulose (CMC), sodium hydroxypropyl methyl cellulose (HPMC) and sodium hydroxymethyl cellulose (HMC).

9 . The rapid charge lithium-ion battery according to claim 5 , wherein both the negative conductive agent and the positive conductive agent are carbon black, or are selected from at least one of carbon fiber, carbon nano-tube, carbon nano-rod and graphene, or are a mixture of carbon black and at least one selected from carbon fiber, carbon nano-tube, carbon nano-rod, phosphorus graphite and graphene.

Assignees

• Dongguan Amperex Tech Ltd

Inventors

• Gao Chao
• Wang Shengwei
• Chen Jie
• Luo Fuping
• Zheng Qiang
• Shen Hongguang

Classifications

• H01M4/5825

  Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines · 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

• H01M4/136

  Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy · CPC title

• H01M4/623

  fluorinated polymers · CPC title

• H01M2004/028

  Positive electrodes · CPC title