摘要:
In an electrolyte of a non-aqueous electrolyte secondary battery using a cyclic carboxylic-acid ester exerting high conductivity under a low temperature condition, for suppressing reductive decomposition of the cyclic carboxylic acid ester, a cyclic carbonic acid ester having at least one carbon-carbon unsaturated bond is contained, and for suppressing excessive polymerization reaction of the cyclic carbonic acid ester having at least one carbon-carbon unsaturated bond, a cyclic carbonic acid ester having no carbon-carbon unsaturated bond is further contained.
摘要:
A salicyl derivative or a salicylidene derivative such as salicyl alcohol or salicylaldehyde is added to a non-aqueous electrolyte to prevent evolution of gas caused by decomposition of the solvent.
摘要:
Disclosed is a non-aqueous electrolyte secondary battery including a positive electrode including a lithium-containing transition metal composite oxide as a positive electrode active material, a negative electrode including a negative electrode active material, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte. The positive electrode contains lithium carbonate and lithium hydrogencarbonate in a total amount of 500 ppm or more and 3000 ppm or less, and exhibits a weight loss by temperature increase from 25° C. to 300° C. at 5° C./min of 70% or less of the total amount and of 1500 ppm or less. The non-aqueous electrolyte includes a non-aqueous solvent and a lithium salt. The non-aqueous solvent may contain a cyclic carbonate and a chain carbonate.
摘要:
Disclosed is a non-aqueous electrolyte secondary battery including a positive electrode including a lithium-containing transition metal composite oxide as a positive electrode active material, a negative electrode including a negative electrode active material, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte. The positive electrode contains lithium carbonate and lithium hydrogencarbonate in a total amount of 500 ppm or more and 3000 ppm or less, and exhibits a weight loss by temperature increase from 25° C. to 300° C. at 5° C./min of 70% or less of the total amount and of 1500 ppm or less. The non-aqueous electrolyte includes a non-aqueous solvent and a lithium salt. The non-aqueous solvent may contain a cyclic carbonate and a chain carbonate.
摘要:
A non-aqueous electrolyte for a secondary battery, including a non-aqueous solvent in which a solute is dissolved, a first additive and a second additive, wherein the first additive is a vinyl monomer having an electron donating group, the second additive is a carbonic acid ester having at least one carbon-carbon unsaturated bond, and an e value, which is a polarization factor of the vinyl monomer having an electron donating group, is a negative value.
摘要:
A non-aqueous electrolyte secondary battery including a positive electrode and a negative electrode each capable of absorbing and desorbing lithium, a separator interposed therebetween, and a non-aqueous electrolyte, wherein the positive electrode includes a positive electrode active material represented by: LiM1-xLxO2 where 0.005≦x≦0.1 is satisfied, M is at least one selected from the group consisting of Mn, Co and Ni, and L is at least one selected from the group consisting of Mg, Al, Ti, Sr, Zn, B, Ca, Cr, Si, Ga, Sn, P, V, Sb, Nb, Ta, Mo, W, Zr, Y and Fe, and the non-aqueous electrolyte includes a phosphinate compound represented by: where R1, R2 and R3 are each independently an aryl group, or an alkyl group, an alkenyl group or an alkynyl group each having 1 to 5 carbon atoms.
摘要翻译:一种非水电解质二次电池,包括能够吸收和解吸锂的正极和负极,隔着隔板的非水电解质二次电池和非水电解质,其中所述正极包括由LiM1- xLxO2,其中满足0.005 <= x <= 0.1,M是选自Mn,Co和Ni中的至少一种,L是选自Mg,Al,Ti,Sr,Zn ,B,Ca,Cr,Si,Ga,Sn,P,V,Sb,Nb,Ta,Mo,W,Zr,Y和Fe,非水电解质包括由下式表示的次膦酸盐化合物:其中R1,R2 和R 3各自独立地为具有1〜5个碳原子的芳基或烷基,烯基或炔基。
摘要:
A non-aqueous electrolyte secondary battery including: a positive electrode that contains a transition metal oxide capable of absorbing and desorbing lithium ions; a negative electrode that is capable of absorbing and desorbing lithium ions; a porous film that is interposed between the positive electrode and the negative electrode; and a non-aqueous electrolyte, wherein at least one selected from inorganic oxide and polyamide is contained in the porous film, and 5 to 15 vol % of ethylene carbonate is contained in a non-aqueous solvent that is contained in the non-aqueous electrolyte.
摘要:
A non-aqueous electrolyte secondary battery of the present invention includes a positive electrode including an active material absorbing and desorbing lithium ions, a negative electrode including an active material absorbing and desorbing lithium ions, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte. The separator includes a material containing a substituent group with electron-withdrawing property. The non-aqueous electrolyte includes a non-aqueous solvent and a solute dissolved therein, and the non-aqueous solvent includes at least one selected from the group consisting of a fluorine-containing aromatic solvent, a fluorine-containing cyclic carbonic acid ester, and a fluorine-containing cyclic carboxylic acid ester.The combination of the foregoing separator and the foregoing non-aqueous electrolyte makes it possible to suppress the deterioration in the rate performance of the battery even when the battery is stored under high voltage and high temperature.
摘要:
A non-aqueous electrolyte of the present invention contains a lithium salt (A), a quaternary ammonium salt (B) containing a straight chain alkyl group having carbon atoms of 4 or less and a solvent (C) composed of at least one compound selected from the group consisting of ethylene carbonate, propylene carbonate, butylene carbonate, γ-butyrolactone, dimethyl carbonate, ethyl methyl carbonate, diethyl carbonate, dimethoxyethane, ethoxymethoxyethane and diethoxyethane. The molar ratio C/A of the solvent (C) to the lithium salt (A) or the molar ratio C/B of the solvent (C) to the ammonium salt (B) is 6 or less. The non-aqueous electrolyte has a single phase. Consequently, there can be obtained a non-aqueous electrolyte of a high ion concentration having an excellent oxidation resistance and reduction resistance.
摘要:
Provided is a non-aqueous electrolyte for a secondary battery including a non-aqueous solvent, a solute dissolved in the non-aqueous solvent, and an additive, in which the additive includes an unsaturated chain hydrocarbon compound having two or more carbon-carbon unsaturated bonds and including a main chain having five or more carbon atoms. The unsaturated chain hydrocarbon compound preferable as the additive is 1,3-hexadiene or 2,4-hexadiene. The amount of the unsaturated chain hydrocarbon compound is preferably 0.1 to 10 parts by weight per 100 parts by weight of the non-aqueous solvent.