Abstract: The invention discloses a positive electrode active material for a magnesium secondary battery or lithium ion secondary battery, including: a particle including a nucleus and a crystal of vanadium oxide grown from the nucleus as a starting point and having a maximum length of 5 ?m or less in the major axis direction.

Abstract: An image forming apparatus including a sheet ejection portion, an in-housing ejection space, and a sheet push mechanism. The sheet push mechanism composed of a sheet push member whose lower end portion touches a sheet ejection surface of the in-housing ejection space and which is movable to a downstream side in the sheet ejection direction, and a holder portion which supports movably an upper end portion of the sheet push member with the holder portion positioned on the lower surface and movable between a reference position where the sheet push member pushes the sheet ejected on the sheet ejection surface and an evacuation position away from the reference position in a horizontal direction.

Abstract: An image forming apparatus according to the present disclosure includes a sheet ejection portion, an in-housing ejection space, and a sheet push mechanism. The sheet push mechanism is composed of a sheet push member whose lower end portion touches a sheet ejection surface of the in-housing ejection space and which is movable to a downstream side in the sheet ejection direction, and a holder portion which supports movably an upper end portion of the sheet push member, and the holder portion is disposed on the lower surface to be movable between a reference position where the sheet push member pushes the sheet ejected on the sheet ejection surface and an evacuation position away from the reference position in a horizontal direction.