NON-AQUEOUS LIQUID ELECTROLYTE, ELECTRICITY STORAGE DEVICE USING SAME, AND PHOSPHORUS COMPOUND USED THEREIN
申请人:UBE INDUSTRIES, LTD.
公开号:US20170275311A1
公开(公告)日:2017-09-28
The present invention is concerned with a nonaqueous electrolytic solution having an electrolyte salt dissolved in a nonaqueous solvent, the nonaqueous electrolytic solution containing a compound represented by the following general formula (X), in which a polar group (X) is bound to a phosphorus atom (P), and capable of improving electrochemical characteristics in a broad temperature range; an energy storage device using the same; and a novel compound.
In the formula, R
10
and R
20
are each independently an organic group selected from the group consisting of an alkyl group having 1 to 8 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, an alkynyl group having 3 to 6 carbon atoms, and an aryl group having 6 to 12 carbon atoms, or a lithium atom; and X is a polar group (i) containing a —C(═O) group, a —P(═O) group, or an —S(═O)
2
group, a polar group (ii) containing a —CN group or an alkyl group having 1 to 6 carbon atoms, in which a part of hydrogen atoms is substituted with a fluorine atom, or a 4- to 7-membered ring polar group (iii) containing a —C(═O)—O— group or a —C(═O)—N— group, provided that when X is a 4- to 7-membered ring polar group (iii) containing a —C(═O)—N— group, at least one of R
10
and R
20
is a lithium atom.
本发明涉及一种非水电解质溶液,其中电解质盐溶解在非水溶剂中,该非水电解质溶液含有以下通式(X)所代表的化合物,其中极性基(X)与磷原子(P)结合,并能够改善广泛温度范围内的电化学特性;使用该非水电解质溶液的储能装置;以及一种新化合物。在该公式中,R10和R20分别独立地是从包括具有1至8个碳原子的烷基基团、具有2至6个碳原子的烯基基团、具有3至6个碳原子的炔基基团和具有6至12个碳原子的芳基基团或锂原子中选择的有机基团;X是一个极性基(i),其中包含一个—C(═O)基团、一个—P(═O)基团或一个—S(═O)2基团,一个极性基(ii),其中包含一个—CN基团或一个具有1至6个碳原子的烷基基团,其中部分氢原子被氟原子取代,或一个4至7环极性基(iii),其中包含一个—C(═O)—O—基团或一个—C(═O)—N—基团,但当X是一个包含一个—C(═O)—N—基团的4至7环极性基(iii)时,至少一个R10和R20是锂原子。