The present invention relates to a composite current collector and its preparation method, electrodes, and batteries. The composite current collector includes an insulating substrate, a first metal layer set on both surfaces of the thickness direction of t...

A secondary battery positive electrode material, relating to the field of battery materials. The secondary battery positive electrode material comprises large particles with particle size of ≥2 μm and small particles with particle size of ≤1 μm. The ...

An an energy storage apparatus is provided. the energy storage apparatus includes: a plurality of single batteries and a bipolar plate, each of the plurality of single batteries including a battery cell, the battery cell including a first electrode and a s...