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Electrolyte additive, lithium secondary battery and non-aqueous electrolyte comprising additive

一种电解质溶液、添加剂的技术，应用在锂盐和磷酸盐化合物,电解质溶液的添加剂领域，能够解决交换电池费用等问题

Active Publication Date: 2014-02-19
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to use batteries as power sources in large and medium-sized industries, batteries with long life are necessary because of the consideration of the need to assemble and use multiple batteries, and the possible cost of exchanging batteries.

Method used

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  • Electrolyte additive, lithium secondary battery and non-aqueous electrolyte comprising additive
  • Electrolyte additive, lithium secondary battery and non-aqueous electrolyte comprising additive
  • Electrolyte additive, lithium secondary battery and non-aqueous electrolyte comprising additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] [Preparation of Electrolyte Solution]

[0055] In an organic solvent containing ethylene carbonate (EC): ethylmethyl carbonate (EMC) at a volume ratio of 3:7 and LiPF containing 1.0M 6 In the mixed solvent, 3% by weight of vinylene carbonate (VC), 1.5% by weight of 1,3-propane sultone and 1.5% by weight of ethylene sulfate were added, all based on the total weight of the electrolyte solution. Additionally, 1% by weight of LiODFB and 0.2% by weight of TMSP were added to the mixture solvent to prepare a nonaqueous electrolyte solution.

[0056] [Preparation of Lithium Secondary Battery]

[0057] A mixture containing a manganese spinel active material and lithium-nickel-manganese-cobalt oxide as a cathode active material, polyvinylidene fluoride (PVdF) as a binder, and carbon as a conductive material were mixed to prepare a cathode slurry. The cathode slurry was coated on an aluminum current collector, dried and rolled to prepare a cathode.

[0058] Natural graphite as...

Embodiment 2

[0061] A non-aqueous dielectric solution and a lithium secondary battery were obtained by performing the same procedure as described in Example 1, except that 1% by weight of LiTFOP and 0.2% by weight of TMSP were added.

Embodiment 3

[0063] A non-aqueous dielectric solution and a lithium secondary battery were obtained by performing the same procedure as described in Example 1, except that 1% by weight of LiBOB and 0.2% by weight of TMSP were added.

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PUM

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Abstract

An additive for an electrolyte solution includes a lithium salt having an oxalato complex as an anion and a compound represented by following Chemical Formula 1. Wherein, a represents C or Si, b represents H or F, and n represents an integer of 1 to 5. A non-aqueous electrolyte solution including the additive and a lithium secondary battery including the electrolyte solution also are provided.

Description

technical field [0001] The present invention relates to an additive for an electrolyte solution, to a nonaqueous electrolyte solution containing the additive, and to a lithium secondary battery containing the electrolyte solution, wherein the additive contains lithium having an oxalate complex (complex) as an anion Salt and phosphate compounds. More particularly, the present invention relates to an additive for an electrolyte solution of a lithium secondary battery having improved life characteristics and good power characteristics. Background technique [0002] With the technological development and increase in demand for mobile devices, the demand for secondary batteries as energy sources has been rapidly increasing. Among these secondary batteries, lithium secondary batteries having high energy density and voltage have been commercialized and widely used. [0003] Recently, lithium secondary batteries have been developed not only as power sources for small devices, but ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0566H01M10/052H01M4/505H01M4/525
CPCH01M10/0567Y02E60/122H01M2300/0025H01M10/056Y02T10/7011H01M10/052Y02E60/10H01M4/505H01M4/525H01M10/0566Y02T10/70
Inventor 安庆昊李哲行梁斗景林永敏安俞贺金珉廷
Owner LG ENERGY SOLUTION LTD
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