SECONDARY BATTERY
A secondary battery includes: a positive electrode current collector; a negative electrode current collector; an electrolyte layer disposed between the positive electrode current collector and the negative electrode current collector; a positive electrode electrolytic solution filling part partitioned by the positive electrode current collector and the electrolyte layer; and a negative electrode electrolytic solution filling part partitioned by the negative electrode current collector and the electrolyte layer. The negative electrode electrolytic solution filling part includes a conductive member having a mesh structure and disposed so as to bring the negative electrode current collector and the electrolyte layer into conduction; a negative electrode active material retained in the conductive member; an electrolyte salt; and a non-aqueous solvent dissolving the electrolyte salt. The negative electrode active material contains at least one selected from the group consisting of silicon, tin, and aluminum, as a constituent element.
1 . A secondary battery comprising:
a positive electrode current collector;
a negative electrode current collector;
an electrolyte layer disposed between the positive electrode current collector and the negative electrode current collector;
a positive electrode electrolytic solution filling part partitioned by the positive electrode current collector and the electrolyte layer; and
a negative electrode electrolytic solution filling part partitioned by the negative electrode current collector and the electrolyte layer, wherein
the negative electrode electrolytic solution filling part comprises:
a conductive member having a mesh structure and disposed so as to bring the negative electrode current collector and the electrolyte layer into conduction;
a negative electrode active material retained in the conductive member; an electrolyte salt; and
a non-aqueous solvent dissolving the electrolyte salt, and
the negative electrode active material comprises at least one selected from the group consisting of silicon, tin, and aluminum, as a constituent element.
2 . The secondary battery according to claim 1 , wherein the conductive member is formed of a carbon material.
3 . The secondary battery according to claim 1 , wherein the non-aqueous solvent comprises 10% by mass or more of fluoroethylene carbonate on a basis of a total amount of the non-aqueous solvent.
4 . The secondary battery according to claim 3 , wherein the non-aqueous solvent consists of fluoroethylene carbonate.
5 . The secondary battery according to claim 1 , wherein the non-aqueous solvent comprises 10% by mass or more of vinylene carbonate on a basis of a total amount of the non-aqueous solvent.
6 . The secondary battery according to claim 5 , wherein the non-aqueous solvent consists of vinylene carbonate.
7 . The secondary battery according to claim 1 , wherein the non-aqueous solvent comprises 10% by mass or more of at least one selected from the group consisting of 12-crown-4, 18-crown-6, 1,2-dimethoxyethane, tetraethylene glycol dimethyl ether, y-butyrolactone, 1-methyl-2-pyrrolidinone, ethyl heptanoate, tetrahydrofuran, ethylene glycol bis(propionitrile)ether, 2-(methylamino)ethanol, and diaminohexane, on a basis of a total amount of the non-aqueous solvent.
8 . The secondary battery according to claim 1 , wherein the negative electrode active material comprises 10% by mass or more of silicon on a basis of a total amount of the negative electrode active material, as a constituent element.
9 . The secondary battery according to claim 1 , wherein the negative electrode active material comprises 10% by mass or more of tin on a basis of a total amount of the negative electrode active material, as a constituent element.
10 . The secondary battery according to claim 1 , wherein the negative electrode active material comprises 10% by mass or more of aluminum on a basis of a total amount of the negative electrode active material, as a constituent element.
11 . The secondary battery according to claim 1 , wherein the positive electrode electrolytic solution filling part comprises:
a conductive member having a mesh structure and disposed so as to bring the positive electrode current collector and the electrolyte layer into conduction;
a positive electrode active material retained in the conductive member;
an electrolyte salt; and
a non-aqueous solvent dissolving the electrolyte salt.
12 . The secondary battery according to claim 11 , wherein the non-aqueous solvent contained in the positive electrode electrolytic solution filling part is a non-aqueous solvent that is different from the non-aqueous solvent contained in the negative electrode electrolytic solution filling part.
13 . The secondary battery according to claim 11 , wherein a content of fluoroethylene carbonate in the positive electrode electrolytic solution filling part is 0.1% by mass or less on a basis of a total amount of the non-aqueous solvent contained in the positive electrode electrolytic solution filling part.
14 . The secondary battery according to claim 11 , wherein the positive electrode electrolytic solution filling part does not comprise fluoroethylene carbonate.
15 . The secondary battery according to claim 11 , wherein a content of vinylene carbonate in the positive electrode electrolytic solution filling part is 0.1% by mass or less on a basis of a total amount of the non-aqueous solvent contained in the positive electrode electrolytic solution filling part.
16 . The secondary battery according to claim 11 , wherein the positive electrode electrolytic solution filling part does not comprise vinylene carbonate.
17 . The secondary battery according to claim 1 , wherein the non-aqueous solvent comprises 10% by mass or more of at least one selected from the group consisting of γ-butyrolactone, ethyl acetate, ethyl pentanoate, dimethyl malonate, diethyl malonate, diethyl methylmalonate, diethyl succinate, diethyl glutarate, diethyl azelate, ethyl heptanoate, heptanoic acid, tetrahydrofuran, 1,2-dimethoxyethane, ethyl propyl ether, tetraethylene glycol dimethyl ether, ethylene glycol bis(3-aminopropyl)ether, diethylene glycol bis(3-aminopropyl)ether, ethylene glycol bis(propionitrile)ether, bis [2-(2-methoxyethoxy)ethyl ether], 12-crown-4, 18-crown-6, taurine, N-methyltaurine, 2-(methylamino)ethanol, diaminohexane, methylenebis(2-chloroaniline), 1-methyl-2-pyrrolidinone, 1,3-dimethyl-2-imidazolidinone, N,N-dimethylformacetamide, N-methyl-piperazine, trimethylamine, triethylamine, N,N-dimethylpropylamine, dimethylformamide, diethylformamide, 1,1,3,3-tetramethylurea, N,N-dimethyl-propyleneurea, cyclohexane, piperidine, cyclopentane, decahydronaphthalene, tetrahydronaphthalene, pyrrolidine, quinoline, and 3-pyrroline, on a basis of a total amount of the non-aqueous solvent.