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Electrolyte solvent and electrolyte solution for oxo-salt lithium cathode active material, and lithium ion secondary battery

An electrolyte solution and secondary battery technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of easy desorption of oxygen, decomposition, poor thermal stability of lithium cobalt oxide, etc.

Active Publication Date: 2016-05-18
SHOEI CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although lithium cobalt oxide has been widely used as a positive electrode active material for lithium-ion secondary batteries, its price is high because cobalt is a rare metal
Moreover, due to the poor thermal stability of lithium cobalt oxide, there is a problem that it is easy to desorb oxygen and decompose when encountering high temperature.

Method used

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  • Electrolyte solvent and electrolyte solution for oxo-salt lithium cathode active material, and lithium ion secondary battery
  • Electrolyte solvent and electrolyte solution for oxo-salt lithium cathode active material, and lithium ion secondary battery
  • Electrolyte solvent and electrolyte solution for oxo-salt lithium cathode active material, and lithium ion secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0160]

[0161] (Synthesis of N,N-diethyl-N-2-methoxyethylamine (N,N-diethyl-N-2-methoxyethylamine))

[0162] Using a 100 mL autoclave, N,N-diethylamine (35.0 g, 478 mmol) and chloroethyl methyl ether (22.6 g, 239 mmol) were reacted at 120° C. for 48 hours. The solid salt formed was filtered off and the residue (filtrate) was distilled under reduced pressure using a 25 cm Vigreux column. to the resulting amine 1 H-NMR measurement, its chemical shift is δ (ppm) 3.45-3.42 (t, 2H), 3.31 (s, 3H), 2.52-2.50 (t, 2H), 2.34-2.31 (t, 2H), 2.22 (s ,3H), 1.45-1.38(m,2H), 1.31-1.22(m,2H), 0.89-0.85(t,3H), it can be confirmed that N,N-diethyl-N-2-methyl Oxyethylamine.

[0163] (Synthesis of N-butyl-N-methyl-N-2-methoxyethylamine (N-butyl-N-methyl-N-2-methoxyethylamine))

[0164] Using a 100 mL autoclave, react N-butyl-N-methylamine (34.0 g, 390 mmol) with chloroethyl methyl ether (18.5 g, 196 mmol) at 130° C. for 48 hours. The solid salt formed was filtered and removed, and the resi...

Embodiment 2

[0198]

[0199] (Synthesis of (N,N,N-tri(2-methoxyethyl)amine)

[0200] Using a 100 mL autoclave, bis(2-methoxyethyl)amine (50.0 g, 375 mmol) was reacted with chloroethyl methyl ether (18.0 g, 190 mmol) at 140° C. for 48 hours. Filter and remove the solid salt formed in the reaction, and use a 25 cm Webster column to distill the remaining filtrate under reduced pressure. figure 1 shows the amines obtained by distillation 1 H-NMR spectrum. like figure 1 As shown, the detailed results of its chemical shift are δ (ppm) 3.45-3.41(t, 6H), 3.30(s, 9H), 2.75-2.72(t, 6H), which confirms that N, N, N - Tris(2-methoxyethyl)amine.

[0201]

[0202] (Synthesis of Ionic Liquid [2-1])

[0203] Using a 50mL autoclave, using methanol as a solvent (10mL), make N,N,N-tris(2-methoxyethyl)amine (9.1g, 48mmol) synthesized in Example 2 and bromoethane (11.2g , 104mmol) at 60°C for 24 hours. The resulting bromide was washed with ether. The washed bromide was recrystallized twice with ace...

Embodiment 3

[0217]

[0218] (Synthesis of N,N-di(2-methoxyethyl)-N-2-ethoxyethylamine (N,N-di-(2-methoxyethyl)-N-2-ethoxyethylamine))

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Abstract

The object of the present invention is to provide an electrolyte solvent for an oxo-salt lithium positive electrode active material, an electrolyte solution for an oxo-salt lithium positive electrode active material, and a lithium ion secondary battery with excellent Coulombic efficiency and discharge capacity, wherein the electrolyte solvent is An electrolyte solvent for a lithium ion secondary battery using lithium oxo acid salt as a positive electrode active material. To this end, the present invention provides an electrolyte solvent for a lithium ion secondary battery using lithium oxo-salt as a positive electrode active material, wherein the electrolyte solvent has ammonium ions containing more than two alkoxy groups Alkyl as its substituent.

Description

technical field [0001] The present invention relates to an electrolyte solvent for lithium-containing oxoacid salts positive electrode active material, and lithium-containing oxoacid salts, which can be used for a lithium ion secondary battery using lithium-containing oxoacid salts as a positive electrode active material Electrolyte solution for positive electrode active material and lithium ion secondary battery. Background technique [0002] Ionic liquids (also referred to as ionic liquids) are salts composed of cations and anions, are compounds having a melting point below room temperature, and have various properties such as flame retardancy, non-volatility, and high thermal stability. As an example of such an ionic liquid, the quaternary ammonium salt described in patent document 1 is known. According to the records of this patent document, 1 to 4 substituents in the quaternary ammonium salt are alkoxyalkyl groups, and such ionic liquids can be used as antibacterial ag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0567H01M10/0568H01M10/0525H01M4/58H01M10/052
CPCH01M10/0525H01M10/0568H01M10/0569Y02E60/10H01M10/056
Inventor 杨立房少华
Owner SHOEI CHEM IND CO LTD
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