33results about How to "Reduced reaction area" patented technology

An object of the invention is to provide a lithium secondary battery using a fused salt at ambient temperature where a high capacity is able to be maintained even when it is stored at a high temperature environment or even when it is subjected to charge and discharge repeatedly and also to provide an electrode for a nonaqueous electrolytic lithium secondary battery. There is disclosed a lithium secondary battery using at least a fused salt at ambient temperature having ionic conductivity in which at least one of the positive and negative electrode contains a powder which solely comprises an inorganic solid electrolyte having lithium ionic conductivity. There is also disclosed an electrode for a lithium secondary battery using, at least, a ionic liquid having ionic conductivity which contains a powder solely comprising inorganic solid electrolyte having lithium ionic conductivity.

A nonaqueous electrolyte secondary battery wherein a material capable of occluding / discharging lithium is used as a negative electrode material and a lithium-transition metal composite oxide which contains Ni and Mn as the transition metal and has a layered structure is used as a positive electrode material is characterized in that a lithium-transition metal composite oxide having a BET specific surface area less than 3 m2 / g and a pH of 11.0 or less when 5 g of the lithium-transition metal composite oxide is immersed in 50 ml of purified water is used as the positive electrode active material.

An electrochemical device of the present invention comprises: a case; an electrode assembly disposed inside the case and comprising a positive electrode, a negative electrode, and a separator interposed between the negative electrode and the positive electrode; and an electrolyte injected into the case, wherein, on the basis of the total volume (CV) of an empty space inside the case according to equation 1 below, the volume (EV) of a free space according to equation 2 below is 0-45 vol%. The contents of equations 1 and 2 are the same as disclosed in the specification. The electrochemical device can solve a problem of accelerating the capacity degradation, causing by reducing the reaction area on surfaces of the electrodes and further increasing the side reaction, through the gas generated from an oxidation reaction of the electrolyte due to a high voltage.

A lithium-ion secondary battery allowed to improve cycle characteristics and initial charge-discharge characteristics is provided. The lithium-ion secondary battery includes: a cathode; an anode including an anode active material layer; and an electrolytic solution. The anode active material layer includes an anode active material and an inorganic compound, and the inorganic compound includes one or both of an alkoxysilane compound and a hydrolysate thereof.

A heat treatment apparatus for a fuel cell membrane-electrode assembly is provided. The heat treatment apparatus includes a hot press installed on upper and lower sides of feeding path to move in the vertical direction on a frame and which presses the electrode catalyst layers on upper and lower surfaces of the membrane-electrode assembly sheet. A plurality of gripper modules are installed at set intervals in a base member along a feeding direction of the membrane-electrode assembly sheet, and selectively grip both side edges of the membrane-electrode assembly sheet. A driving unit reciprocally moves the base member in a direction perpendicular to the feeding direction of the membrane-electrode assembly sheet and in the feeding direction of the membrane-electrode assembly sheet.

This invention discloses a method for producing phosphogypsum composite bricks, which are produced from: steam-cured phosphogypsum 30-55 parts, gel material 10-30 parts, curing agent 5-15 parts, aggregrate 5-37 parts, and reinforcer 1-5 parts. The method comprises: (1) steam-curing phosphogypsum, mixing and strring with the other raw materials; (2) adding water so that the water content is 12-20%; (3) molding under 10-80 MPa; (4) steam-curing at high temperatures and high pressure for 5-24 h. The composite bricks have such advantages as high flexural strength, high compressive strength and good freeze resistance, thus can be used on main walls. The method efficiently and largely consumes phosphogypsum, thus saving soil resources and preventing environmental pollution by phosphogypsum piling. Besides, the method has high profit, and is environmentally friendly.

The invention discloses a high-efficiency self-control horizontal rotary-electrode electro-catalysis oxidation dirt removal device. The high-efficiency self-control horizontal rotary-electrode electro-catalysis oxidation dirt removal device comprises a cylinder; an end cover is arranged at each of the two ends of the cylinder for sealing; a central rotating shaft is arranged in the centre of the cylinder; an electrode group is arranged on the central rotating shaft in a sleeving manner; the two ends of the central rotating shaft penetrate out of the end covers at the two ends; one end of the central rotating shaft is connected with a shaft seat at the tail end, and the other end of the central rotating shaft is connected with a driving device; the cylinder is placed horizontally; the electrode group comprises a plurality of electrode plates which are arranged in parallel on the central rotating shaft in a sleeving manner at intervals; the electrode plates consist of sacrificial anode plates and cathode plates; the anode plates and the cathode plates are arranged alternately; the sacrificial anode plates and the cathode plates are disc plates with equal diameter; the central rotating shaft is arranged in central holes of the anode plates in a sleeving manner and is fixedly connected with the central holes of the anode plates in a contact manner; a plurality of convex bumps are arranged on the edge of each sacrificial anode plate and around the centre of a circle; a connecting hole is formed in each convex bump; the convex bumps on each sacrificial anode plates correspond to one another; an anode energizing shaft penetrates through each connecting hole; the two ends of each anode energizing shaft are connected with the end covers at the two ends of the cylinder; the central rotating shaft is arranged in the central holes of the sacrificial anode plates in the sleeving manner.