Abstract: An inexpensive positive electrode active material for lithium batteries which comprises lithium manganate having a hexagonal layered structure with space group of R3m and exhibits continuous discharge voltage characteristics between 4.5 V and 2 V for metallic lithium.

Abstract: A fluid delivery device according to the present invention has a fluid delivery device body and an electrochemical cell portion for generating a gas when supplied with a DC current. The fluid delivery device body has a partition member transformable by the pressure of a gas, and a gas introduction portion. A first compartment and a second compartment are formed in the fluid delivery device body by the partition member, and a gas generated in the electrochemical cell portion is introduced into the second compartment through the gas introduction portion. A transformable fluid reservoir having a fluid delivery portion is disposed in the first compartment. If the gas generated in the electrochemical cell portion is introduced into the second compartment, the inner pressure of the second compartment increases, and the partition member is pushed, so that a fluid in the fluid reservoir disposed in the first compartment is delivered from the fluid delivery portion.

Abstract: A positive active material for a non-aqueous cell comprising a lithium-manganese composite oxide having an oxygen-defect type spinel structure and its preparing process are disclosed. A cell comprising the positive active material for a non-aqueous cell has excellent properties with high discharge capacity, a monotonous variation of the potential without flection during both charging and discharging, and very limited loss of the electric capacity upon charging and discharging.

Abstract: In a method according to the present invention for manufacturing a nickel-metal-hydride battery, a positive electrode including nickel hydroxide, a negative electrode including a hydrogen occlusion alloy, and a separator are assembled, and the assembled components are placed in a battery vessel. The battery vessel is filled with an alkali electrolyte, and the vessel is sealed so as to produce a sealed nickel-metal-hydride battery. Thereafter, a formation step including at least one charging/discharging cycle of the nickel-metal-hydride battery is carried out, and after the formation step, the nickel-metal-hydride battery is charged. After the charging, the nickel-metal-hydride battery is left in a charged state for from one day until a time when there is no discharge capacity due to self-discharge.

Abstract: A positive electrode active material for a lithium secondary battery is made of LiNi.sub.1-x-y-z Co.sub.x Mn.sub.y Al.sub.z O.sub.2, in which x, y and z satisfy relations of 0.ltoreq.y.ltoreq.0.3, 0.ltoreq.x.ltoreq.0.25, 0.ltoreq.z.ltoreq.0.15.

Abstract: A nonaqueous polymer battery includes a lithium ion conductive polymer having pores, a positive active material, and a carbonaceous negative active material. In the nonaqueous polymer battery, the positive active material is represented by Li.sub.1-x CoO.sub.2 (0.ltoreq.x.ltoreq.1) wherein the molar ratio of the carbon atoms in the negative active material to the cobalt atoms in the positive active material is 7.5 or lower; the positive active material is represented by Li.sub.1-x NiO.sub.2 (0.ltoreq.x.ltoreq.1) wherein the molar ratio of the carbon atoms in the negative active material to the nickel atoms in the positive active material is less than 10; or the positive active material is represented by Li.sub.1-x Ni(Co)O.sub.2 (Li.sub.1-x NiO.sub.2 having not more than 20% of the nickel atoms thereof displaced with cobalt ions; 0.ltoreq.x.ltoreq.

Abstract: A positive electrode active material for lithium battery which is represented by general formula Li.sub.x Mn.sub.2-y M.sub.y O.sub.4 (M: a 2-valency metal selected from Ni, Co, Fe and Zn with 0.45.ltoreq.y.ltoreq.0.60, 1.ltoreq.x.ltoreq.2.1) having cubic spinel structure of lattice constant within 8.190 angstrom. Such an active material is manufactured by employing sol-gel process wherein one of inorganic salt, hydroxide and organic acid salt of lithium or a mixture of these for Li, one of inorganic salt and organic acid salt of manganese or a mixture of these for Mn, and one of inorganic salt and organic acid salt of the selected metal or a mixture of these for M are used as the starting materials for synthesis, ammonia water is added to the solutions of these starting materials in alcohol or water to obtain gelatinous material and the gelatinous material thus obtained is fired.

Abstract: In a method for producing a lithium nickelate positive electrode, nickel hydroxide or nickel oxyhydroxide is held into an electrically conductive porous substrate to form an electrode plate, the electrode is treated with an alkaline solution containing lithium ion; and the electrode treated with the alkaline solution is heated at a temperature not higher than 450.degree. C.

Abstract: A method for manufacturing positive a electrode active material for a lithium battery represented by general formula Li.sub.x Mn.sub.2-y M.sub.y O.sub.4 (M: a 2-valency metal, 0.45.ltoreq.y.ltoreq.0.60, 1.ltoreq.x.ltoreq.2.1) having cubic spinel structure of and a lattice constant within 8.190 angstroms by employing a solid phase reaction, comprising the steps of firing a lithium compound, a manganese compound and a metal M compound and refiring the fired material after pressurizing it at least once to remove a metal M oxide.

Abstract: A positive electrode active material for lithium battery which is represented by general formula Li.sub.x Mn.sub.2-y M.sub.y O.sub.4 (M: a 2-valency metal, 0.45.ltoreq.y.ltoreq.0.60, 1.ltoreq.x.ltoreq.2.1) having cubic spinel structure of lattice constant within 8.190 angstroms.

Abstract: In a method of producing a lithium nickelate according to the present invention, a cobalt containing oxy-nickel hydroxide of a .beta.-type, a .gamma.-type, or a mixture of a .beta.-type and a .gamma.-type is mixed with a lithium salt, and heat treatment is applied to the mixture at a temperature of 400.degree. C. to 500.degree. C.

Abstract: A positive electrode active material for a lithium secondary battery is made of LiNi.sub.1-x-y-z Co.sub.x Mn.sub.y Al.sub.z O.sub.2, in which x, y and z satisfy relations of 0.ltoreq.y.ltoreq.0.3, 0.ltoreq.x.ltoreq.0.25, 0<z.ltoreq.0.15.

Abstract: A positive electrode active material for lithium battery which is represented by general formula Li.sub.x Mn.sub.2-y M.sub.y O.sub.4 (M: a 2-valency metal selected from Ni, Co, Fe and Zn with 0.45.ltoreq.y.ltoreq.0.60, 1.ltoreq.x.ltoreq.2.1) having cubic spinel structure of lattice constant within 8.190 angstrom. Such an active material is manufactured by employing sol-gel process wherein one of inorganic salt, hydroxide and organic acid salt of lithium or a mixture of these for Li, one of inorganic salt and organic acid salt of manganese or a mixture of these for Mn, and one of inorganic salt and organic acid salt of the selected metal or a mixture of these for M are used as the starting materials for synthesis, ammonia water is added to the solutions of these starting materials in alcohol or water to obtain gelatinous material and the gelatinous material thus obtained is fired.

Abstract: The present invention provides a lithium secondary cell containing a positive electrode including a material which occludes and exudes lithium; a negative electrode containing a negative material including graphite; and a separator disposed between the positive and negative electrodes; wherein the quantity of lithium occluded in the negative material in a fully-charged state is less than 55% of the theoretical lithium occlusion capacity of the negative electrode.

Abstract: In the present invention, an organic electrolyte secondary cell of the present invention is comprised of a positive electrode, a negative electrode including a carbon material occluding and discharging lithium ion, and an organic electrolyte. In the cell, at least a part of the carbon material is covered with a lithium alkoxide compound having a molecular weight more than 52.

Abstract: An electrochemical fluid delivery device of the present invention includes a case, pressure generating part and fluid reservoir part. The case has a cover capable of being opened and closed. When the cover is closed after the fluid reservoir part is accommodated in the case, the inside of the case can be maintained in an airtight condition. The pressure generating part includes a power supply part and electrochemical cell part. When a direct current flows in the electrochemical cell part, gas is generated and accumulates in the airtight case. By the pressure of gas, the fluid reservoir part is pressurized so that the fluid can be delivered. The amount of gas generated at constant pressure by the electrochemical cell part is determined by a quantity of electricity (current.times.time). Since the amount of fluid to be delivered is proportional to the amount of generated gas, the amount of fluid to be delivered in a unit time can be determined by the intensity of a current.

Abstract: A light transmitting apparatus of the present invention has cylindrical ducts in which the light transmits, the ducts having an internal light reflection effect and a bending portion having an internal light reflection effect, a cross section of the bending portion is elliptical; wherein the bending portion connects the ducts. Accordingly, the present invention can improve the light transmitting efficiency of the bending part of the apparatus for transmitting the light.