Win-Win Strategies Enable Efficient Anode-Less Zinc-Ion Hybrid Supercapacitors.

Boosting the energy and power densities of electrochemical energy storage (EES) devices to broaden their practicality is of great significance and emergently desirable. Recently, the EES cells with an anode-free concept have been announced to realize those targets. Herein, 20 μm of a zincophilic layer prepared by blending ZIF-8 and sodium alginate (SA) is uniformly coated on Cu foil (Z8-SA@Cu) as an alternative anode for anode-less zinc-ion hybrid supercapacitors (ALZHSCs).

In Situ Construction of Nitrogen-Doped and Zinc-Confined Microporous Carbon Enabling Efficient Na-Storage Abilities.

Benefiting from the additional active sites for sodium-ion (Na) adsorption and porous architecture for electrolyte accessibility, nitrogen-doped porous carbon has been considered the alternative anode material for Na-storage applications. In this study, nitrogen-doped and zinc-confined microporous carbon (-MPC) powders are successfully prepared by thermally pyrolyzing the polyhedral ZIF-8 nanoparticles under an argon atmosphere. Following the electrochemical measurements, the -MPC not only delivers good reversible capacity (423 mAh/g at 0.

Constructing a Carbon-Encapsulated Carbon Composite Material with Hierarchically Porous Architectures for Efficient Capacitive Storage in Organic Supercapacitors.

Hierarchical porous activated carbon (HPAC) materials with fascinating porous features are favored for their function as active materials for supercapacitors. However, achieving high mass-loading of the HPAC electrodes remains challenging. Inspired by the concepts of carbon/carbon (C/C) composites and hydrogels, a novel hydrogel-derived HPAC (H-HPAC) encapsulated H-HPAC (H@H) composite material was successfully synthesized in this study.