Manufacturing method for negative electrode pole piece for sodium ion battery

The invention relates to a manufacturing method for a negative electrode pole piece for a sodium ion battery. The manufacturing method comprises the steps of uniformly grinding an active material, and performing vacuum drying to obtain the active material used for the negative electrode of the sodium ion battery; performing slurry mixing from the active material, a conductive agent and a binder based on proportion, and uniformly coating a current collector copper foil with the slurry, and then performing vacuum drying and tabletting to obtain the negative electrode pole piece for the sodium ion battery. Compared with the prior art, the manufacturing method provided by the invention is simple. An electrochemical test proves that the negative electrode pole piece is high in cycling stability, and relatively high in specific discharge capacity; the first time discharge capacity can reach 568mAh/g under the current density of 100mA/g; after the battery is circulated for 50 times, the discharge capacity still can