Rechargeable zinc-ammonium hybrid microbattery with ultrahigh energy and power density

To achieve the miniaturization of self-powered electronic devices, mi-crobatteries (MBs) with superior electrochemical performance are highly desired. However, it remains challenging to rationally assemble nanomaterials onto microelectrodes. In this work, a novel dual-com-plexant electrodeposition method was used to construct ammonium copper hexacyanoferrate (NH4CuHCF) on porous Ni, achieving a 3D hierarchical structure. After coating with poly(3,4-ethylenedioxythio-phene), the organic-inorganic hybrid cathode is fabricated and employed as the cathode for rechargeable zinc-ammonium hybrid mi-crobatteries (RZAH-MBs). Notably, the RZAH-MB delivers a high discharge plateau of -1.8 V and remarkable energy density of 0.44 mWh cm -2. Moreover, the maximum areal power density and corre-sponding energy density retention of our RZAH-MB (80.83 mW cm -2, 0.31 mWh cm -2) are among the best performances of micro -en-ergy storage devices. Therefore, the RZAH-MB can drive an RF chips -LED system for remote control. The MB features excellent electro-chemical performance and high integrability, making it a promising candidate for self-powered microelectronic devices.

Automated summary

In this study, a novel dual-complexant electrodeposition method was used to construct a 3D hierarchical structure of ammonium copper hexacyanoferrate on porous Ni, forming an organic-inorganic hybrid cathode for rechargeable zinc-ammonium hybrid microbatteries. The microbattery exhibits a high discharge plateau and remarkable energy density, enabling it to drive an RF chips-LED system, suggesting its potential as a candidate for self-powered microelectronic devices.