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1. CN103996892 - Ether electrolyte and lithium air battery

Office Chine
Numéro de la demande 201410269876.6
Date de la demande 17.06.2014
Numéro de publication 103996892
Date de publication 20.08.2014
Type de publication A
CIB
H01M 12/08
HÉLECTRICITÉ
01ÉLÉMENTS ÉLECTRIQUES FONDAMENTAUX
MPROCÉDÉS OU MOYENS POUR LA CONVERSION DIRECTE DE L'ÉNERGIE CHIMIQUE EN ÉNERGIE ÉLECTRIQUE, p.ex. BATTERIES
12Éléments hybrides; Leur fabrication
08composés d'un demi-élément du type élément à combustible et d'un demi-élément du type à élément secondaire
CPC
H01M 12/06
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
12Hybrid cells; Manufacture thereof
04composed of a half-cell of the fuel-cell type and of a half-cell of the primary-cell type
06with one metallic and one gaseous electrode
H01M 2300/0028
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
2300Electrolytes
0017Non-aqueous electrolytes
0025Organic electrolyte
0028characterised by the solvent
Y02E 60/10
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
60Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
10Energy storage
Déposants CHANGZHOU YINGHUA HIGH-TECH ENERGY STORAGE MATERIALS TECHNOLOGY CO., LTD.
CHANGCHUN INSTITUTE OF APPLIED CHEMISTRY, CHINESE ACADEMY OF SCIENCES
Inventeurs PENG ZHANGQUAN
WANG JIAWEI
MA LIPO
Mandataires zhao jingduo
Titre
(EN) Ether electrolyte and lithium air battery
(ZH) 一种醚类电解液及锂空气电池
Abrégé
(EN)
The invention provides ether electrolyte. The ether electrolyte comprises lithium salt and an organic solvent, wherein the organic solvent comprises one or more of 1,2-dimethoxyethane, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether and tetraethylene glycol dimethyl ether. The ether electrolyte has advantages that the ether electrolyte is unlikely to volatize, the oxygen dissolving degree is high, the electrochemical stable window is wide, and the like, and has excellent chemical stability for a discharging intermediate product O2<-1> or LiO2 and a discharging final product Li2O2. The lithium air battery prepared by utilizing the ethers electrolyte is excellent in long cycling stability. The experimental result shows that a charging-discharging curve is not obviously changed after the lithium air battery assembled by utilizing the ether electrolyte is circularly charged and discharged for 30 times at a limit capacity of 1,000mAh/g under the current density of 100mA/g.

(ZH)

本发明提供了一种醚类电解液,包括锂盐和有机溶剂;所述有机溶剂包括乙二醇二甲基醚、二乙二醇二甲基醚、三乙二醇二甲基醚和四乙二醇二甲基醚中的一种或多种。本发明提供的醚类电解液具有不易挥发、氧气溶解度高、电化学稳定窗口宽等优点,尤其对放电中间产物O2-或LiO2、放电终产物Li2O2具有优异的化学稳定性,因此,本发明提供的醚类电解液制备的锂空气电池具有优异的长循环稳定性。实验结果表明,应用本发明的醚类电解液组装的锂空气电池,在100mA/g电流密度下,限制容量1000mAh/g充放电循环,30次循环未见明显的充放电曲线变化。