3D printing structure -based Cu&Bi2O3 anode toward high-performance rechargeable alkaline battery and photodetector.

As an energy storage device, the aqueous alkaline battery holds great potential, particularly for applications requiring high energy density and high power density. Anode materials with excellent performance are indispensable to producing stable and high-energy aqueous rechargeable batteries. In this study, 3D-printed porous and planar substrates were employed as growth vehicles for Bi 2 O 3. As a result, rapid charge transfer and ion diffusion are successfully achieved by utilizing porous structure channels. A remarkable specific capacity of 2.63 mAh cm−2 is attained for the porous structure-based Bi 2 O 3 , which can attribute to the formed p-type homojunction between CuO/Cu 2 O and Bi 2 O 3. Additionally, the cycle stability of Bi 2 O 3 deposited on the porous structure substrate is enhanced dramatically due to this structure enables less bismuth-based salt ions, oxide, and hydroxide deposition. Consequently, the harmful accumulation of bismuth-based mixture deposition on the anode surface was prevented, resulting in the mitigation of electrode passivation. Besides, a favorable photoresponse rate is displayed for the porous structure Bi 2 O 3 anode, proving the practicable Cu&Bi 2 O 3 combination and the reasonable structural design. [ABSTRACT FROM AUTHOR]