Abstract: A method for processing a lithium ion secondary battery includes: a crushing and sorting step (S02) of crushing and classifying a lithium ion secondary battery to obtain an electrode material containing at least lithium; a leaching step (S03) of immersing the electrode material in an acid to obtain a leachate; a pH adjustment step (S04) of adding lithium hydroxide to the leachate to adjust a pH; a metal recovery step (S05) of recovering a metal other than lithium in the leachate to obtain a lithium-containing liquid; and a lithium hydroxide recovery step (S06) of recovering lithium in the lithium-containing liquid as lithium hydroxide, in which the lithium hydroxide recovered in the lithium hydroxide recovery step (S06) is used in the pH adjustment step (S04).

Abstract: A method for treating waste printed circuit board includes carbonizing waste printed circuit board together with a calcium compound at 400° C. to 600° C. in a non-oxidizing atmosphere to fix a halogen contained in the board as calcium halide and to melt a solder of the board to allow mounted parts to be easily separated from the board, performing crushing after the carbonizing, and sieving crushed materials into fine particles of less than 0.5 mm containing the calcium compounds, medium particles containing the mounted parts, and coarse particles containing board pieces such that the crushed materials are sorted into the calcium compounds, the mounted parts, and the board pieces.

Abstract: In this treatment method of a coated wire, a coated wire, which is a metal wire coated with a resin, is subjected to low-temperature heating in a non-combustion atmosphere in coexistence with an alkali to embrittle the coating resin, the embrittled coating resin is crushed, and the coating resin and the metal wire are separated.

Abstract: Provided is a negative electrode for use in a zinc secondary battery, including a negative electrode active material layer having a first surface and a second surface, and a negative electrode current collector plate embedded in the negative electrode active material layer parallel to the negative electrode active material layer. The first surface of the negative electrode active material layer is more remote from the negative electrode current collector plate than the second surface, whereby the center of the negative electrode active material layer in a thickness direction is deviated from a reference plane passing through the center of the negative electrode current collector plate in a thickness direction. A ratio of a thickness defined as a distance between the second surface and the reference plane to a thickness defined as a distance between the first surface and the reference plane is greater than 0 and 0.5 or less.

Abstract: A treatment liquid for a screen printing plate is disclosed that contains a resin, water, a surfactant A, and a surfactant B having a solubility in water lower than a solubility of the surfactant A in water. A method for treating a screen printing plate is also disclosed.

Abstract: A method of treating a waste liquid includes: an aluminum dissolution step of dissolving aluminum in an acidic waste liquid and performing separation into a first treated water and a reduced heavy metal precipitate; a gypsum recovery step of adding a calcium compound to the first treated water at a liquid property of a pH of 4 or less, and performing separation into a second treated water and gypsum; an aluminum and fluorine removal step of adding an alkali to the second treated water and performing separation into a third treated water and a precipitate containing aluminum and fluorine; and a neutralization step of adding an alkali to the third treated water and performing separation into an alkali neutralization treated water and a neutralized precipitate of a heavy metal hydroxide.

Abstract: A method of treating a waste liquid: an aluminum dissolution step of dissolving aluminum in an acidic waste liquid and performing separation into a first treated water and a reduced heavy metal precipitate; a gypsum recovery step of adding a calcium compound to the first treated water at a pH of 4 or less, and performing separation into a second treated water and gypsum; a heavy metal coprecipitation step of adding a ferric compound to the second treated water and performing separation into a third treated water and a heavy metal coprecipitate; an aluminum and fluorine removal step of adding an alkali to the third treated water and performing separation into a fourth treated water and a precipitate containing aluminum and fluorine; and a neutralization step of adding an alkali to the fourth treated water and performing separation into an alkali neutralization treated water and a neutralized heavy metal hydroxide.

Abstract: Provided is a negative electrode for use in a zinc secondary battery containing (A) ZnO particles and (B) at least two selected from the group consisting of (i) metallic Zn particles having an average particle size D50 of 5 to 80 ?m, (ii) at least one metal element selected from In and Bi, and (iii) a binder resin having a hydroxyl group.

Abstract: A method for treating waste printed circuit board includes carbonizing waste printed circuit board together with a calcium compound at 400° C. to 600° C. in a non-oxidizing atmosphere to fix a halogen contained in the board as calcium halide and to melt a solder of the board to allow mounted parts to be easily separated from the board, performing crushing after the carbonizing, and sieving crushed materials into fine particles of less than 0.5 mm containing the calcium compounds, medium particles containing the mounted parts, and coarse particles containing board pieces such that the crushed materials are sorted into the calcium compounds, the mounted parts, and the board pieces.

Abstract: A treatment liquid for a screen printing plate is disclosed that contains a resin, water, a surfactant A, and a surfactant B having a solubility in water lower than a solubility of the surfactant A in water. A method for treating a screen printing plate is also disclosed.

Abstract: A semiconductor device includes a gate electrode, a semiconductor film, and a conductive film. The semiconductor film includes an oxide semiconductor material. The semiconductor film includes a channel region, a low-resistance region, and an intermediate region. The channel region is opposed to the gate electrode. The low-resistance region has a lower electric resistance than the channel region. The intermediate region is provided between the low-resistance region and the channel region. The conductive film is provided selectively in contact with the low-resistance region of the semiconductor film.

Abstract: In this treatment method of a coated wire, a coated wire, which is a metal wire coated with a resin, is subjected to low-temperature heating in a non-combustion atmosphere in coexistence with an alkali to embrittle the coating resin, the embrittled coating resin is crushed, and the coating resin and the metal wire are separated.

Abstract: A valuable material recovery method includes a discharge step of discharging a lithium-ion battery; a thermal decomposition step of reducing a lithium compound, which is a cathode active material, into a magnetic oxide by thermally treating the lithium-ion battery after being discharged; a crushing step of crushing the lithium-ion battery, after being thermally decomposed, into fragments of a size suitable for wind sorting, allowing part of the magnetic oxide to remain in the aluminum foil; a sieving step of sieving a crushed material to separate the crushed material into an oversized product and an undersized product; a wind sorting step of separating the oversized product into a heavy product and a light product; and a magnetic sorting step of sorting and recovering the aluminum foil with a residue of the magnetic oxide, as a magnetized material, and recovering the copper foil as a non-magnetized material from the light product.

Abstract: Provided is a negative electrode for use in a zinc secondary battery containing (A) ZnO particles and (B) at least two selected from the group consisting of (i) metallic Zn particles having an average particle size D50 of 5 to 80 ?m, (ii) at least one metal element selected from In and Bi, and (iii) a binder resin having a hydroxyl group.

Abstract: A method for driving a display device includes stopping a display operation of a display based on a presence or absence of a signal indicating an off operation of a main power switch of the display. The method further includes applying a recovery voltage across a gate and source of a driving transistor in the display based on a threshold voltage shift of the driving transistor. The threshold voltage shift is determined during a stopped state of the display operation of the display. The stopped state of the display operation of the display occurs prior to starting the display operation of the display.

Abstract: A method of treating a waste liquid includes: an aluminum dissolution step of dissolving aluminum in an acidic waste liquid and performing separation into a first treated water and a reduced heavy metal precipitate; a gypsum recovery step of adding a calcium compound to the first treated water at a liquid property of a pH of 4 or less, and performing separation into a second treated water and gypsum; an aluminum and fluorine removal step of adding an alkali to the second treated water and performing separation into a third treated water and a precipitate containing aluminum and fluorine; and a neutralization step of adding an alkali to the third treated water and performing separation into an alkali neutralization treated water and a neutralized precipitate of a heavy metal hydroxide.

Abstract: The oscillating element includes a crystal blank, a pair of excitation electrodes, and a pair of pad portions. The crystal blank includes a pair of major surfaces, at least partially configured by crystal planes, and side surfaces which connect outer edges of the pair of major surfaces. Further, it includes a mesa portion and an outer peripheral portion which surrounds the mesa portion and has a thickness between the pair of major surfaces thinner than that of the mesa portion. The excitation electrodes are individually located on the pair of major surfaces. The pair of pad portions are located on one of the pairs of major surfaces and are electrically connected with the excitation electrodes. At least a portion of an edge part which is in contact with a crystal plane includes a projecting portion, which does not exceed the height of the mesa portion from the outer peripheral portion.

Abstract: A method of treating a waste liquid: an aluminum dissolution step of dissolving aluminum in an acidic waste liquid and performing separation into a first treated water and a reduced heavy metal precipitate; a gypsum recovery step of adding a calcium compound to the first treated water at a pH of 4 or less, and performing separation into a second treated water and gypsum; a heavy metal coprecipitation step of adding a ferric compound to the second treated water and performing separation into a third treated water and a heavy metal coprecipitate; an aluminum and fluorine removal step of adding an alkali to the third treated water and performing separation into a fourth treated water and a precipitate containing aluminum and fluorine; and a neutralization step of adding an alkali to the fourth treated water and performing separation into an alkali neutralization treated water and a neutralized heavy metal hydroxide.

Abstract: A semiconductor device includes a gate electrode, a semiconductor film, and a conductive film. The semiconductor film includes an oxide semiconductor material. The semiconductor film includes a channel region, a low-resistance region, and an intermediate region. The channel region is opposed to the gate electrode. The low-resistance region has a lower electric resistance than the channel region. The intermediate region is provided between the low-resistance region and the channel region. The conductive film is provided selectively in contact with the low-resistance region of the semiconductor film.