Abstract: An electrolyte solution containing at least one compound represented by formula (1-1) and formula (1-2), formula (1-1) being: where R101 is an optionally fluorinated C1-C7 alkyl group, an optionally fluorinated C2-C8 alkenyl group, an optionally fluorinated C2-C9 alkynyl group, or an optionally fluorinated C6-C12 aryl group, and optionally contains at least one selected from O, Si, S, and N in a structure; and formula (1-2) being: where R102 and R103 are (i) each individually H, F, an optionally fluorinated C1-C7 alkyl group, an optionally fluorinated C2-C7 alkenyl group, an optionally fluorinated C2-C9 alkynyl group, or an optionally fluorinated C5-C12 aryl group, or (ii) hydrocarbon groups binding to each other to form a 5-membered or 6-membered hetero ring with a nitrogen atom; and R102 and R103 each optionally contain at least one selected from O, S, and N in a structure.

Abstract: An electrode having a coating layer formed from a composition including a perfluoropolyether group-containing compound represented by the formula (A1), (A2), (B1), (B2), (C1), (C2), (D1), (D2), (E1) or (E2) as defined herein, wherein in the composition, compounds represented by formulae (A2), (B2), (C2), (D2) and (E2) are 0.1 mol % or more and 35 mol % or less based on the total amount of compounds represented by formulae (A1), (B1), (C1), (D1) and (E1) and compounds represented by formulae (A2), (B2), (C2), (D2) and (E2). Also disclosed is an electrochemical device including the electrode.

Abstract: Provided are an electrolytic solution that can allow a secondary battery comprising a silicon negative electrode to be improved in life and suppressed in an increase in resistance, and a secondary battery using the electrolytic solution. An electrolytic solution for use in a battery comprising an electrode having a negative electrode material containing a silicon element and a carbon element, wherein the electrolytic solution comprises less than 10% by mass of a fluorinated ether represented by the following general formula (1): HCF2CF2—O—R (1), wherein R is a fluorinated alkyl group.

Abstract: Provided is a negative electrode mixture containing a single-walled carbon nanotube, a negative electrode active material, and a binder, in which the negative electrode mixture contains, as the negative electrode active material, a negative electrode active material that exhibits a potential of 2.5 V or less vs. Li when alloyed with Li or bonded with Li, and the binder contains a fluorine-containing copolymer containing vinylidene fluoride unit and a unit of an other monomer other than vinylidene fluoride.

Abstract: Provided is a composition for an electrochemical device, comprising a nanocarbon material, a binder, and a solvent, wherein the nanocarbon material is at least one selected from the group consisting of a multi-walled carbon nanotube, a carbon nanohorn, a carbon nanofiber, a fullerene, and a graphene, and the binder comprises a fluorine-containing copolymer comprising a repeating unit (a) based on vinylidene fluoride and at least one repeating unit (b) selected from the group consisting of a repeating unit (b1) and a repeating unit (b2).

Abstract: Provided is a composition, comprising single-walled carbon nanotube, a binder, and a specific solvent, wherein the binder contains a fluorine-containing polymer containing a vinylidene fluoride unit.

Abstract: Provided is a composition for an electrochemical device, containing a single-walled carbon nanotube, a binder, and a solvent, wherein the binder comprises a fluorine-containing copolymer comprising a repeating unit (a) based on vinylidene fluoride, and at least one repeating unit (b) selected from the group consisting of a repeating unit (b1) and a repeating unit (b2).

Abstract: An electrolyte solution containing a compound represented by formula (1) and a compound represented, for example, by formula (11-1), the formula (1) being: wherein M101 is P or P?O; R101 is a group such as a C1-C11 alkylsilyloxy group; n101 is an oxidation number of M101 minus 1 or an oxidation number of M101 minus 3; and R102 to R104 are each individually a group such as a C1-C11 alkyl group; the formula (11-1) being: wherein R111 and R112 are the same as or different from each other and are each an atom or group such as a hydrogen atom; and R113 is a group such as an alkyl group free from a fluorine atom.

Abstract: An electrolyte solution containing a compound represented by the following formula (1).

Abstract: A positive electrode mixture containing a polyvinylidene fluoride (A); a fluorine-containing copolymer (B) containing vinylidene fluoride unit and tetrafluoroethylene unit; a positive electrode active material (C) represented by the general formula (C): LiyNi1-xMxO2, wherein x is 0.01?x?0.7, y is 0.9?y?2.0, and M represents a metal atom (excluding Li and Ni); and an additive (D). Also disclosed is a positive electrode formed from the positive electrode mixture and a secondary battery including the positive electrode.

Abstract: A positive electrode mixture containing: a polyvinylidene fluoride (A); a positive electrode active material (C) represented by the general formula (C): LiyNi1-XMxO2, wherein x is 0.01?x?0.7, y is 0.9?y?2.0, and M represents a metal atom (excluding Li and Ni); and an additive (D), wherein the polyvinylidene fluoride (A) is a combination of: (A2) a polymer containing vinylidene fluoride unit and a fluorinated monomer unit; and at least one selected from the group consisting of (A3) a polymer containing vinylidene fluoride unit and a polar group-containing monomer unit, and (A4) a polymer containing vinylidene fluoride unit, a fluorinated monomer unit, and a polar group-containing monomer unit. Also disclosed is a positive electrode famed from the positive electrode mixture and a secondary battery including the positive electrode.

Abstract: An electrolyte solution containing a compound (1) represented by the formula (1), (wherein R101 and R102 are each individually a substituent such as a C1-C7 alkyl group, and the substituent optionally contains at least one divalent to hexavalent hetero atom in a structure or optionally has a structure obtained by replacing at least one hydrogen atom by a fluorine atom or a C0-C7 functional group) and at least one compound (11) selected from compounds such as a compound represented by formula (11-1) (wherein R111 and R112 are the same as or different from each other and are each a hydrogen atom or the like, and R113 is an alkyl group free from a fluorine atom or the like):

Abstract: A compound and composition each capable of allowing an electrochemical device to have improved cycle characteristics, low resistance, and reduced gas generation. Also disclosed is an electrochemical device, a lithium-ion secondary battery, and a module each including the composition as an electrolytic solution. More particularly, the disclosure relates to an electrolytic solution containing a compound represented by the following formula (1): Rf1—O—Rf2??(1) wherein Rf1 and Rf2 are the same as or different from each other and are each a C2-C4 fluorinated alkenyl group.

Abstract: An electrolytic solution containing: a compound (1) represented by the following formula (1): wherein R101 is a C2-C7 organic group and optionally includes at least one selected from the group consisting of a hetero atom and an unsaturated bond; and R102 is a C1-C3 organic group and optionally includes at least one selected from the group consisting of a hetero atom and an unsaturated bond.

Abstract: An electrolyte solution containing: a compound (1) represented by the following formula (1): wherein R101 to R103 are each independently a C1-C5 organic group optionally containing at least one selected from the group consisting of a hetero atom and an unsaturated bond, and R101 to R103 form no ring.

Abstract: The invention provides an electrolyte solution capable of providing an electrochemical device having low resistance and excellent high-temperature storage characteristics and cycle characteristics. The electrolyte solution contains lithium fluorosulfonate and a solvent containing a compound (1) represented by the following formula (1): CF2HCOOCH3.

Abstract: An electrode including a fluoropolyether group-containing compound, wherein the fluoropolyether group-containing compound is a fluoropolyether group-containing compound represented by the following formula (1) or (2): RF1?—XARSi???(1) RSi?—XA—RF2—XA—RSi???(2) ; an electrochemical device including the electrode; a module including the electrochemical device; and a lithium ion secondary battery including the electrode.

Abstract: There is provided a positive electrode for nonaqueous electrolyte secondary batteries having a high-density and a high folding strength. There is also provided a nonaqueous electrolyte secondary battery including such a positive electrode. The positive electrode has a high folding strength when it is used in a battery with a high current density, and a nonaqueous electrolyte secondary battery having such a positive electrode. The positive electrode has an electrode body having formed a folded portion at least at one part of the positive electrode. With respect to a cross-section of the positive electrode composition layer, a domain A extends from a central part to a surface side of a thickness direction, and a domain B extends from the central part to the current collector. The distribution of the binder in domain A and domain B are specified.

Abstract: An electrolyte solution containing at least one compound represented by formula (1-1) and formula (1-2), formula (1-1) being: where R101 is an optionally fluorinated C1-C7 alkyl group, an optionally fluorinated C2-C8 alkenyl group, an optionally fluorinated C2-C9 alkynyl group, or an optionally fluorinated C6-C12 aryl group, and optionally contains at least one selected from O, Si, S, and N in a structure; and formula (1-2) being: where R102 and R103 are (i) each individually H, F, an optionally fluorinated C1-C7 alkyl group, an optionally fluorinated C2-C7 alkenyl group, an optionally fluorinated C2-C9 alkynyl group, or an optionally fluorinated C5-C12 aryl group, or (ii) hydrocarbon groups binding to each other to form a 5-membered or 6-membered hetero ring with a nitrogen atom; and R102 and R103 each optionally contain at least one selected from O, S, and N in a structure.

Abstract: An electrolyte solution containing a compound represented by formula (1) and a compound represented, for example, by formula (11-1), the formula (1) being: wherein M101 is P or P?O; R101 is a group such as a C1-C11 alkylsilyloxy group; n101 is an oxidation number of M101 minus 1 or an oxidation number of M101 minus 3; and R102 to R104 are each individually a group such as a C1-C11 alkyl group; the formula (11-1) being: wherein R111 and R112 are the same as or different from each other and are each an atom or group such as a hydrogen atom; and R113 is a group such as an alkyl group free from a fluorine atom.