# US 2014/0212746 A1 · Lithium secondary battery for high voltage

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- Number: US 2014/0212746 A1
- Document ID: US20140212746A1
- Status: Published application
- Kind: A1
- Application number: 14/107,099
- Filed: 2013-12-16
- Published: 2014-07-31
- Earliest claimed: 2013-01-25
- Assignees: Samsung SDI Co., Ltd.
- Applicants: Samsung SDI Co., Ltd.
- Inventors: Daesik KIM
- Web page: https://patentgrep.com/patent/US20140212746A1

## CPC

- H01M 10/0567: characterised by the additives
- H01M 4/505: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
- H01M 10/052: Li-accumulators
- Y02E 60/10: Energy storage using batteries
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A lithium secondary battery for producing a high voltage, the lithium secondary battery including a negative electrode; a cyclic polyamine compound as an additive; and a positive electrode including a high-voltage spinel-type positive active material represented by Formula 1: Li1+xNiyMn2−y−zMzO4+w (1) wherein, in Formula 1, 0≦x<0.2, 0.4≦y≦0.6, 0≦z≦0.2, 0≦w≦0.1, and M is at least one element selected from the group of Al, Ti, Mg, Zn, Mo, Y, Zr and Ca.

## Claims

### Claim 1

A lithium secondary battery for producing a high voltage, the lithium secondary battery comprising:
a negative electrode;
a cyclic polyamine compound as an additive; and
a positive electrode including a high-voltage spinel-type positive active material represented by Formula 1:
Li1+xNiyMn2−y−zMzO4+w (1)
wherein, in Formula 1, 0≦x<0.2, 0.4≦y≦0.6, 0≦z≦0.2, 0≦w≦0.1, and M is at least one element selected from the group of Al, Ti, Mg, Zn, Mo, Y, Zr and Ca.

### Claim 2 (depends on 1)

The lithium secondary battery as claimed in claim 1, wherein the cyclic polyamine compound includes at least one selected from the group of 1,4,8,11-tetraazacyclotetradecane (cyclam), 1,4,7,10-tetraazacyclododecane (cyclene), 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane (TM-cyclam), 1,4,8,11-tetraazacyclotetradecane-5,7-dione (DO-cyclam), and cyclo(β-alanylglycyl-β-alanylglycyl).

### Claim 3 (depends on 1)

The lithium secondary battery as claimed in claim 1, wherein the cyclic polyamine compound is in an electrolyte solution.

### Claim 4 (depends on 3)

The lithium secondary battery as claimed in claim 3, wherein the cyclic polyamine compound is included in an amount of about 0.01 wt % to about 1 wt %, based on a total weight of the electrolyte solution.

### Claim 5 (depends on 1)

The lithium secondary battery as claimed in claim 1, wherein the positive electrode further includes one or more inorganic additive selected from the group of ZnO, TiO2, SnO2, Al2O3, In2O3, SiO2, WO3, and V2O5.

### Claim 6 (depends on 1)

The lithium secondary battery as claimed in claim 1, wherein an operating voltage of the positive electrode is about 4.6 V or higher, based on lithium metal.

### Claim 7 (depends on 1)

The lithium secondary battery as claimed in claim 1, wherein the compound represented by Formula 1 is LiMn1.5Ni0.5O4.

### Claim 8 (depends on 1)

The lithium secondary battery as claimed in claim 1, wherein the cyclic polyamine compound includes 3 or more nitrogen atoms in a ring of the compound.

### Claim 9 (depends on 8)

The lithium secondary battery as claimed in claim 8, wherein the cyclic polyamine compound includes 4 to 8 nitrogen atoms in the ring of the compound.

### Claim 10 (depends on 8)

The lithium secondary battery as claimed in claim 8, wherein the polyamine compound further includes at least one pendant hydrocarbon group bound to at least one of the nitrogen atoms in the ring of the compound.