Abstract:
A secondary battery wherein each electrode contains carbon fibers with an average length of less than 100 .mu.m and a conductivity agent and which has a high charge-discharge capacity.
Abstract:
An oxygen scavenger (1) comprises an oxygen absorbent composition (7) and an oxygen permeable film (9) covering the oxygen absorbent composition (7) and including an asymmetric porous membrane (3) whose outer surface portion in the thickness direction of the asymmetric porous membrane (3) is formed as a dense skin layer (4). Since the dense skin layer (4) is very thin, the oxygen permeability to the oxygen absorbent composition (7) through the oxygen permeable film (9 ) can be maintained sufficiently high. At the same time, since the dense skin layer (4) has a sufficiently high barrier property as well as a high oxygen permeability, then where a container is provided with the oxygen scavenger, contact of a substance stored in the container with the oxygen absorbent composition (7) can be prevented with certainty. The substances stored in the container provided wtih the oxygen scavenger (1) can be prevented from deterioration due to the oxygen present in the container by a high oxygen absorption ability of the scavenger (1), and maintained in a good or fresh condition for a long time.
Abstract:
An oxygen scavenger comprises an oxygen absorbent composition and an oxygen permeable film covering the oxygen absorbent composition and including an asymmetric porous membrane whose outer surface portion in the thickness direction of the asymmetric porous membrane is formed as a dense skin layer. Since the dense skin layer is very thin, the oxygen permeability to the oxygen absorbent composition through the oxygen permeable film can be maintained sufficiently high. At the same time, since the dense skin layer has a sufficiently high barrier property as well as a high oxygen permeability, contact of the substances stored in a container with the oxygen absorbent composition can be surely prevented. The substances stored in the container attached with the oxygen scavenger can be prevented from deterioration due to the oxygen present in the container by a high oxygen absorption ability of the scavenger, and maintained in a good or fresh condition for a long term.
Abstract:
An amorphous carbon material, especially for an electrode of a lithium ion secondary battery, is characterized by an interlayer spacing d(002), obtained from the X-ray diffraction line assigned to the (002) plane of the carbon, of 0.345 nm to 0.365 nm, a ratio (Ps) os the number of carbon atoms involved in the layer structure to the total number of carbon atoms of from 0.54 to 0.85, and a ratio of the total nitrogen:total carbon atoms in the amorphous carbon of 0.005;1 to 0.055:1. The amorphous carbon material is prepared by applying a heat treatment to an amorphous carbon under under vacuum or inert gas atmosphere for at least 30 minutes to provide the desired crystalline structure. The carbon material may take the form of carbon fiber material, especially short carbon fibers obtained by pulverising larger carbon fibers. A lithium ion secondary battery containing an electrode comprising such an amorphous carbon material has a large discharge capacity and high chargedischarge cycle characteristics.
Abstract:
An oxygen scavenger (1) comprises an oxygen absorbent composition (7) and an oxygen permeable film (9) covering the oxygen absorbent composition (7) and including an asymmetric porous membrane (3) whose outer surface portion in the thickness direction of the asymmetric porous membrane (3) is formed as a dense skin layer (4). Since the dense skin layer (4) is very thin, the oxygen permeability to the oxygen absorbent composition (7) through the oxygen permeable film (9 ) can be maintained sufficiently high. At the same time, since the dense skin layer (4) has a sufficiently high barrier property as well as a high oxygen permeability, then where a container is provided with the oxygen scavenger, contact of a substance stored in the container with the oxygen absorbent composition (7) can be prevented with certainty. The substances stored in the container provided wtih the oxygen scavenger (1) can be prevented from deterioration due to the oxygen present in the container by a high oxygen absorption ability of the scavenger (1), and maintained in a good or fresh condition for a long time.
Abstract:
A secondary battery wherein each electrode contains carbon fibers with an average length of less than 100 νm and a conductivity agent and which has a high charge-discharge capacity.
Abstract:
A plasma display where crosstalk at its end sections is prevented by eliminating the jumping and rising of the end sections of a partition which occurs during firing. The plasma display is characterized in that slope sections are formed at the end sections of a stripe-like partition in the lengthwise direction and the height (Y) and the base length (X) of each of the slope sections are 0.5≤X/Y≤100. A method for manufacturing such a plasma display comprises the step of forming on a substrate a stripe-like partition pattern having slope sections at the end sections by using paste for partition composed of an inorganic material and an organic component and the step of firing the partition pattern.
Abstract:
PROBLEM TO BE SOLVED: To provide a cleaning method and a cleaning apparatus for a coating head which are used for removing excess highly viscous coating liquid adhering to the periphery of a discharge outlet of a coating head after the coating liquid is discharged out of the discharge outlet of a coating die and which are capable of wiping the coating liquid without leaving any remaining of the coating liquid in the periphery of the discharge outlet of the coating head, constantly keeping the clean state before the application of the coating liquid, and preventing defective coating parts such as vertical stripes in the coated face, and to provide a plasma display and a production method and a production apparatus for producing members of a plasma display. SOLUTION: The cleaning method is used for cleaning the periphery of a slit-type discharge outlet of a coating head for discharging a coating liquid out of the discharge outlet and comprises a cleaning step of sliding the periphery of the discharge outlet in the longitudinal direction of the coating head while bringing a cleaning member having a hard cleaning part into linear contact with the periphery and a cleaning step of sliding the periphery of the discharge outlet in the longitudinal direction of the coating head while bringing a cloth into the periphery through a roll having a rotation shaft in the approximately rectangular direction to the longitudinal direction of the coating head.