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). Contributing by the distinctive features evidenced by electrochemical measurements and post-mortem analyses: (1) less nucleation barrier and overpotential, (2) limited zincate formation, (3) improved Zn