Nonaqueous secondary battery

Provided is an anode for use in electrochemical cells, wherein the anode active layer has a first layer comprising lithium metal and a multi-layer structure comprising single ion conducting layers and crosslinked polymer layers in contact with the first layer comprising lithium metal or in contact with an intermediate protective layer, such as a temporary protective metal layer, on the surface of the lithium-containing first layer. The anodes of the current invention are particularly useful in electrochemical cells comprising sulfur-containing cathode active materials, such as elemental sulfur.

Lithium anodes for electrochemical cells

Es wird ein Brennstoffzellenstapel mit Zelleneinheiten bereitgestellt, die eine Sammelleitung, eine offene Endplatte, die an einer Seite der Zelleneinheiten angeordnet ist und einen Reaktionsgaseinlass und -auslass hat, die mit der Sammelleitung verbunden sind, und eine geschlossene Endplatte enthalten, die an der an der anderen Seite der Zelleneinheiten angeordnet ist und die Sammelleitung abschliest. Insbesondere enthalt die Endplatte eine erste schrage Oberflache, die die Stromung eines Reaktionsgases am Reaktionsgaseinlass und an der Sammelleitungs-Schnittstelle regelt. Ein erster Ausrichtungsvorsprung bildet die erste schrage Oberflache und richtet die Zelleneinheiten aus, und die geschlossene Endplatte enthalt eine zweite schrage Oberflache, die die Stromung des Reaktionsgases an der Sammelleitungs-Schnittstelle regelt. Auserdem bildet ein zweiter Ausrichtungsvorsprung die zweite schrage Oberflache und richtet die Zelleneinheiten entsprechend aus.

Fuel cell stack

A high capacity lithium secondary battery with excellent safety is provided by suppressing expansion of a negative electrode active material during charge and increasing the content of a heat-resistant resin in a separator relative to conventional one. The lithium secondary battery includes: a negative electrode active material that comprises compound particles containing at least one metal element selected from the group consisting of Si, Sn, Al, and Zn; and a separator that has a first porous layer comprising polyolefin and a second porous layer comprising a heat-resistant resin. The separator contains 10 to 60 parts by weight of the second porous layer per 100 parts by weight of the first porous layer.

Lithium Secondary Battery

A solid oxide fuel cell (10) comprises a solid electrolyte layer (30), a barrier layer (40), and a cathode (50) The cathode (50) includes a cathode current collecting layer (51) and a cathode active layer (52) The cathode active layer (52) includes a plurality of micro-cracks (SL) in an interface region (52a) within a predetermined distance (Da) from the interface (P2) between the cathode current collecting layer (51) and the cathode active layer (52)

Solid-oxide fuel cell

PROBLEM TO BE SOLVED: To improve a discharge capacity and a cycle characteristic by using a carbon material coated with a lithium salt-containing solid polymer electrolyte as a negative electrode material, and setting the content of lithium salt to a specific quantity relative to the weight of the solid polymer electrolyte. SOLUTION: The content of lithium salt is preferably set to 25-40 wt.% against a solid polymer electrolyte. PEO and LiPF 6 are resolved to form an acetonitrile solution so that the LiPF 6 as the lithium salt is contained at 30 wt.% to the total weight of the PEO and LiPF 6 . Natural graphite powder is put into the acetonitrile solution, the mixture is stirred to evaporate and remove a solvent, and natural graphite powder coated with the lithium salt-containing solid polymer electrolyte is obtained. PVdF is mixed into it as a binder at the wt.% of 90:10 to obtain a negative mix. N-methyl-2-pyrolidone is added to the negative electrode mix to form slurry. A copper foil is coated with this slurry, rolled to the width 42 cm, and cut out to manufacture a negative electrode. COPYRIGHT: (C)1999,JPO

Lithium secondary battery and its manufacture

PROBLEM TO BE SOLVED: To provide an optimum system which can reduce peak power demand, using a small storage battery. SOLUTION: A solar power generation system, which is linked to a power system, supplies the power generated at a solar cell device to an inverter device for conversion to alternating current, and feeds it to a power consumption part, comprises a storage battery to charge power from the solar cell device, and a changeover control means to output the power from the solar cell device to the storage battery or to the inverter device upon changing over; and supplies the power to the inverter device in addition to generated energy from the solar cell device, by controlling to charge the storage battery with one or more of power selected from the generated power by the solar cell device during off-peak time of power demand after sun rising or power from the power system during night time, and by controlling discharge of energy stored in the storage battery corresponding to a fluctuation curve of the power demand in a particular time zone the power demand is high.

Solar power generation system having storage battery

PROBLEM TO BE SOLVED: To provide a fuel cell capable of holding an electrolyte film in a humid state without degrading cell performance by enhancing total power generating efficiency in a power generating system. SOLUTION: A plurality of cell units 14, in which a cell 12 having an anode at one surface of an electrolyte film and a cathode at the other surface thereof is held by plates 22, 32 having a fuel chamber 20 on an anode side and an oxidant chamber 30 on a cathode side, are laminated. A cooling plate 42 having a cooling chamber 40 is provided in each or several of the cell units. A fuel pipeline 24, through which fuel gas passes substantially in parallel to a laminating direction of the cell units, and a cooling pipeline 44, through which cooling water passes, are provided in each of the cell units 14 and the cooling plate 42. In this manner, a solid high polymer type fuel cell can be obtained. In this case, the fuel pipeline 24 and the cooling pipeline 44 communicate with each other via a water passing hole 50, through which only the cooling water can pass. Part of the cooling water passing the cooling pipeline 44 intrudes into the fuel pipeline 24 through the water passing hole 50, thereby himidifying the fuel gas passing through the fuel pipeline 24.

Solid polymer type fuel cell

PROBLEM TO BE SOLVED: To obtain a high current collecting performance in a nonaqueous electrolyte secondary battery, in which a take-up electrode 7 is housed in a can 1. SOLUTION: In this nonaqueous electrolyte secondary battery, an edge 78 of a band-shaped core configuring an electrode protrudes at the end of a take-up electrode 7, and a collecting plate 8 is connected to the edge 78. On the collecting plate 8, plural convex parts 82, whose cross section projects in hyperbolic or trapezoidal shapes, are formed opposite to the core edge 78, and the collecting plate 8 is coupled to one electrode terminal 1 in conjunction with being welded to the core edge 78, in a condition where each convex 82 bites into the core edge 78.

Nonaqueous electrolyte secondary battery and manufacturing method therefor

PROBLEM TO BE SOLVED: To keep a wet condition throughout a solid high polymer film area even if an oxidizer gas which is not humidified is supplied, by lowering moisture permeability of a gas diffusion layer on a cathode side in the neighboring area of a gas inlet than moisture permeability of a gas diffusion layer on an anode side in other areas. SOLUTION: This high polymer fuel cell is formed by interveningly inserting a solid high polymer film 21 between a cathode 22 and an anode 23 and sandwiching them by two diffusion layers, and electricity is generated by passing an oxidizing gas and a fuel gas through it. In the gas diffusion layer 24 on the cathode 22 side of the cell 20, a fluorine resin content in the front part 241 forming the neighboring area of an air inlet is made bigger than that in the back part 242 forming the neighboring area of an air outlet, and high water repellency is given to the front part. Moisture evaporation in a solid high polymer film 21 area corresponding to the front part 241 is suppressed, conductivity of the solid high polymer film 21 is uniformed, and excellent power generation effect is displayed under good stability. A structure having a thick gas diffusion layer so as to make the moisture permeability low in the neighboring area of the gas inlet on the cathode 22 side is also preferable.

育郎米津

Papers

Lithium secondary battery and its manufacture

Solar power generation system having storage battery

Solid polymer type fuel cell

Nonaqueous electrolyte secondary battery and manufacturing method therefor

Solid high polymer fuel cell

育郎 米津

Papers

Lithium secondary battery and its manufacture

Solar power generation system having storage battery

Solid polymer type fuel cell

Nonaqueous electrolyte secondary battery and manufacturing method therefor

Solid high polymer fuel cell

育郎米津