Abstract: A battery cell for use in a redox flow battery, the battery cell including an electrode, a membrane facing one of both surfaces of the electrode, and a bipolar plate facing the other surface of the electrode, wherein the bipolar plate includes, in a surface thereof facing the electrode, a flow channel for an electrolyte, the electrode is a porous body containing carbon materials, and a compressive strain in a thickness direction of the electrode when a compressive stress of 0.8 MPa is applied in the thickness direction of the electrode is 20% or more and 60% or less.

Abstract: A battery cell for use in a redox flow battery, the battery cell including an electrode, a membrane facing one of both surfaces of the electrode, and a bipolar plate facing the other surface of the electrode, wherein the bipolar plate includes, in a surface thereof facing the electrode, a flow channel for an electrolyte, the electrode is a porous body containing carbon materials, and a compressive strain in a thickness direction of the electrode when a compressive stress of 0.8 MPa is applied in the thickness direction of the electrode is 20% or more and 60% or less.

Abstract: A redox flow battery includes an electrode, a cell frame including a frame body and a bipolar plate and having a fitting recess in which the electrode is fitted, and a membrane disposed so as to sandwich the electrode between the bipolar plate and the membrane. In the redox flow battery, a gap between, among outer peripheral edge surfaces of the electrode, a side edge surface parallel to a direction in which an electrolyte flows and an inner wall surface of the fitting recess, the inner wall surface facing the side edge surface, is 0.1 mm or more and 12 mm or less.

Abstract: A redox flow battery includes an electrode, a cell frame including a frame body and a bipolar plate and having a fitting recess in which the electrode is fitted, and a membrane disposed so as to sandwich the electrode between the bipolar plate and the membrane. In the redox flow battery, a gap between, among outer peripheral edge surfaces of the electrode, a side edge surface parallel to a direction in which an electrolyte flows and an inner wall surface of the fitting recess, the inner wall surface facing the side edge surface, is 0.1 mm or more and 12 mm or less.

Abstract: This invention provides a cell stack for a redox flow battery that can provide battery efficiencies with high reliability over a long term, without any adhesive bonding between a bipolar plate and electrodes. In the cell stack 1 for the redox flow battery of a cell frame 2, electrodes 3, 4 and a membrane 5 being stacked in layers, the cell frame 2 comprises a frame 2A and a bipolar plate 9 arranged inside of the frame 2A, and the electrodes 3, 4 are put into close contact with the bipolar plate 9 by a clamping force, without being adhesively bonded to the bipolar plate 9. It is preferable that when the electrodes 3, 4 are compressed to a thickness corresponding to a level difference between the frame 2A and the bipolar plate 9, repulsive force of the electrodes is in the range of more than 15 kPa to less than 150 kPa (more than 0.153 kgf/cm2 to less than 1.53 kgf/cm2).

Abstract: This invention provides a cell frame for a redox flow battery that prevents leakage of electrolyte out of the cell frame and also provides a good workability in assembling the redox flow battery. Also, this invention provides a redox flow battery using the cell frame. In the cell frame 30 for the redox flow battery 30 comprising a bipolar plate 21 and a frame 31 fitted around a periphery of the bipolar plate 21, the frame 31 has, on each side thereof, an inner seal and an outer seal to press-contact with a membrane and also seal electrolyte. The frame 31 has, on each side thereof, an inner seal groove 34 and an outer seal groove 35 for placing therein the inner seal and the outer seal, respectively, to prevent the electrolyte from leaking out, and O-rings are placed in the respective seal grooves.

Abstract: This invention provides a cell frame for a redox flow battery that prevents leakage of electrolyte out of the cell frame and also provides a good workability in assembling the redox flow battery. Also, this invention provides a redox flow battery using the cell frame. In the cell frame 30 for the redox flow battery 30 comprising a bipolar plate 21 and a frame 31 fitted around a periphery of the bipolar plate 21, the frame 31 has, on each side thereof, an inner seal and an outer seal to press-contact with a membrane and also seal electrolyte. The frame 31 has, on each side thereof, an inner seal groove 34 and an outer seal groove 35 for placing therein the inner seal and the outer seal, respectively, to prevent the electrolyte from leaking out, and O-rings are placed in the respective seal grooves.

Abstract: This invention provides a cell stack for a redox flow battery that can provide battery efficiencies with high reliability over a long term, without any adhesive bonding between a bipolar plate and electrodes. In the cell stack 1 for the redox flow battery of a cell frame 2, electrodes 3, 4 and a membrane 5 being stacked in layers, the cell frame 2 comprises a frame 2A and a bipolar plate 9 arranged inside of the frame 2A, and the electrodes 3, 4 are put into close contact with the bipolar plate 9 by a clamping force, without being adhesively bonded to the bipolar plate 9. It is preferable that when the electrodes 3, 4 are compressed to a thickness corresponding to a level difference between the frame 2A and the bipolar plate 9, repulsive force of the electrodes is in the range of more than 15 kPa to less than 150 kPa (more than 0.153 kgf/cm2 to less than 1.53 kgf/cm2).

Abstract: A cell frame for a redox-flow cell excellent in sealability between a frame member and a dipole sheet and a redox-flow cell having it are disclosed. The cell frame is composed of a dipole sheet (9) and a frame member (2A) attached to the periphery of the dipole sheet (9). The frame member (2A) contains 50 mass % or more of vinyl chloride. The dipole sheet is made of a conductive plastic containing 40-90 mass % of graphite and 10-60 mass % of a chlorinated organic compound. Chloride.

Abstract: This invention provides a cell frame for a redox flow battery that prevents leakage of electrolyte out of the cell frame and also provides a good workability in assembling the redox flow battery. Also, this invention provides a redox flow battery using the cell frame. In the cell frame 30 for the redox flow battery 30 comprising a bipolar plate 21 and a frame 31 fitted around a periphery of the bipolar plate 21, the frame 31 has, on each side thereof, an inner seal and an outer seal to press-contact with a membrane and also seal electrolyte. The frame 31 has, on each side thereof, an inner seal groove 34 and an outer seal groove 35 for placing therein the inner seal and the outer seal, respectively, to prevent the electrolyte from leaking out, and O-rings are placed in the respective seal grooves.

Abstract: A method of forming a microstructure having a higher aspect ratio by using a general purpose synchrotron orbital radiation apparatus is provided. A resist layer mainly including a copolymer of methylmethacrylate and methacrylic acid is formed relatively thick on a substrate. Lithography by synchrotron orbital radiation is carried out on the resist layer, to form a resist pattern. By carrying out normal electroplating, electro-forming or the like in accordance with the resist pattern, a microstructure having a high aspect ratio is obtained.