Dowa Electronics Materials Co., Ltd.

Andes Electric Co., Ltd.

Dowa Holdings Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Dowa IP Creation Co., Ltd.

Yoshiaki Aiki

Koji Tanoue

Toshihiko Ueyama

Wakao Sakamoto

Nariaki Miki

Takayuki Uchiyama

Tomoya Yamada

Isao Fujita

Shunichi Takahashi

A producing method of a solution that contains lithium, at least one of a niobium complex and a titanium complex, and ammonia, wherein an amount of the ammonia in the solution is 0.3 mass % or less. The solution is suitable for forming a coating layer capable of improving battery characteristics of an active material in a battery.

Solution and method for producing the same, and a method for producing active material, for secondary battery

There is provided a solution containing lithium and at least one of a niobium complex and a titanium complex, excellent in storage stability, and suitable for forming a coating layer capable of improving battery characteristics of an active material, and a related technique, which is the solution containing lithium, at least one of a niobium complex and a titanium complex, and ammonia, wherein an amount of the ammonia in the solution is 0.2 mass % or less.

Solution and method for producing the same, and a method for producing active material for secondary battery

Provided is an active material composite powder with which resistance can be reduced, and a method for manufacturing the active material composite powder. The active material composite powder includes an active material and lithium niobate attached onto the surface of the active material, and its BET specific surface area S [m/g] is 0.93&#x3c;S&#x3c;1.44, and the method for manufacturing an active material composite powder includes a spraying and drying step of spraying a solution including lithium and a peroxo complex of niobium onto the active material and at the same time drying the solution, and a heating treatment step of carrying out a heating treatment after the spraying and drying step, wherein the temperature of the heating treatment is higher than 123&#xb0; C. and lower than 350&#xb0; C.

Active material composite powder, lithium battery, and method for manufacturing the same

A positive electrode active material for a lithium ion secondary cell, in which the amount of a transition metal present in the vicinity of the outermost surface thereof is significantly decreased is provided. A solid electrolyte-coated positive electrode active material powder contains particles of a positive electrode active material for lithium ion secondary cell, containing a composite oxide of Li and a transition metal M, having on a surface thereof a coating layer of a solid electrolyte represented by LiAlTi(PO), wherein 0 &#xa3; X &#xa3; 0.5. An average proportion of a total atom number of Al, Ti and P in a total atom number of Al, Ti, M and P within an etching depth of 1 nm from the outermost surface determined by analysis in a depth direction with XPS is 50% or more. The transition metal M is, for example, at least one kind of Co, Ni and Mn.

Positive-electrode active-material powder and manufacturing method therefor

To provide a carrier for two-component electrophotographic developer not only having excellent fluidity but also having proper surface irregularities necessary for imparting electric charge, without generating cracks/chipping of particles even under an influence of stirring stress over a long period of time. A particle surface has raised parts of striped pattern extending almost continuously in a plurality of directions while being superposed on one another, with a surface formed with raised parts of striped pattern occupying 80% or more of the whole surface of a particle. Depths of grooves between the adjacent raised parts are 0.05 &#x3bc;m or more and 0.2 &#x3bc;m or less, average surface roughness Ra is 0.1 &#x3bc;m or more and 0.3 &#x3bc;m or less, roundness is 0.90 or more, and average particle size is 15 &#x3bc;m or more and 100 &#x3bc;m or less, and a carrier core material thus constituted is coated with resin. Thus, the carrier for two-component electrophotographic developer is prepared.

Carrier core material for electrophotographic developer and method for producing the same, carrier for electrophotographic developer, and electrophotographic developer

An air ion measuring device is provided which holds the air passage rate in an ion detector as constant as possible to provide for improved air ion measurement reliability, permits a size and thickness reduction and also a reduction of parts and cost of the ion detector, permits ready cleaning thereof, provides a measure for coping with static electricity, provides good visual recognition property in the air ion data display and displays data other than air ion data and error data. An ion detector structure is formed by disposing a charge collector electrode and repelling electrodes in the vicinity of opposite ends of the charge collector electrode on one side surface of an air passage, through which air is withdrawn from one end portion and exhausted from the other end portion, and disposing a further repelling electrode on the other side surface of the air passage.

Air ion measuring device

The ion measuring device comprises an ion detector including a charge collector electrode disposed in an air passage with an air passing member provided therein and capable of collecting ions in air in the air passage and repelling electrodes disposed to face the charge collector electrode, a measurement computation device for executing computation processing on related to the charge on the charge collector electrode to obtain data representing the numbers of measured positive and negative ions per unit time and unit volume, a charging circuit including a switch for switching the positive and negative polarities of the charge applied to the repelling electrodes such that the repelling electrodes are charged to the same polarity as the polarity of measurement subject ions, and a discharging circuit for discharging the charge collector electrode at time intervals corresponding to the timings of switching by the switch.

Ion measuring device

A negative ion generator, which can suppress positive ion generation, permits ready control of a quantity of generated negative ions and permits a size and thickness reduction. The negative ion generator is of an electron emission type in which, for negative ion generation, electrons are emitted into the air by impressing a negative high voltage on a stylus electric discharge electrode. A piezoelectric transformer is used for amplifying a non-rectified drive voltage from a transformer drive circuit. As a result of rectification of the AC high voltage from the piezoelectric transformer, a negative high voltage is obtained, which is impressed on the stylus electric discharge electrode for electron emission therefrom, thereby generating negative ions in the air.

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Tokyo, Japan

Yoshiaki Aiki