Abstract: Provided is a positive electrode sheet and a preparation method thereof. The positive electrode sheet includes a current collector and a positive electrode material layer. The positive electrode material layer is coated on the current collector and includes a Prussian blue-type material containing crystal water, a conductive agent, a binder, and a gelatinous non-aqueous electrolyte. The positive electrode material layer has characteristics satisfying 0.1?R2*(M1+M4)/((M2+M3)*R1)?9, wherein the M1 represents a thermogravimetric loss rate of the Prussian blue-type material at 200° C.˜400° C.

Abstract: A turbine, including: a volute and an impeller. The volute includes: a volute gas inlet, a volute gas feeding flow passage, and a volute gas outlet. The impeller includes: blades, an impeller gas feeding flow passage, an impeller gas inlet, an impeller gas outlet, and a partition plate. The impeller gas feeding flow passage includes: an inner flow passage and an outer flow passage. The impeller is disposed inside the volute. The blades are disposed on an outer part of the impeller. The partition plate is circumferentially disposed between the impeller gas inlet and the impeller gas outlet. The partition plate divides the impeller gas feeding flow passage into the inner flow passage and the outer flow passage.