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Hybrid zinc‐ion capacitors combine the energy storage capabilities of zinc‐ion batteries with the high‐power output of supercapacitors. However, the limited cycle life and narrow electrochemical window of hybrid zinc‐ion capacitors currently restrict their potential applications. Herein, a hybrid zinc‐ion capacitor is fabricated on laser‐induced graphene (LIG) based on in situ electropolymerization of organic compound poly(8‐amino‐2‐naphthol). The electropolymerized long‐conjugated chain polymers on the 3D conductive framework of LIG can enhance reaction kinetics, suppress the dissolution of organic compounds, and boost capacity. Simultaneously, hydrogen bonds form between polymer chains, aiding in proton transport. The assembled Zn//carbon cloth/LIG/poly(8‐amino‐2‐naphthol) hybrid zinc‐ion capacitors possess a high specific capacity of 308 mAh g−1 at 0.1 mA cm−2, which is twice as much as that of the batteries without LIG. Additionally, these hybrid capacitors can stably endure 10 000 cycles at a current density of 5 mA cm−2. [ABSTRACT FROM AUTHOR]

Aqueous rechargeable batteries (ARBs) have attracted wide attention due to their rich resources, environmental friendliness, and safety. The high ionic conductivity, safety and interfacial wettability of the aqueous electrolyte are essential for energy storage devices. However, the narrow electrochemical stability window (ESW) of the aqueous electrolyte and the side reactions of the electrode/electrolyte lead to the low energy density of the ARBs. In the past studies, the above problems were generally solved by improving the ion transport characteristics of the electrolyte and the electrode/electrolyte interface. Herein, we discuss the background, limitations, and key concepts for performance improvement of aqueous electrolytes, aiming to provide a comprehensive perspective and inspiration for further research on aqueous electrolytes and promote their development and application in the field of energy storage. [ABSTRACT FROM AUTHOR]

The growth of dendrites and the hydrogen evolution reaction pose significant challenges to the development of Zn metal aqueous batteries as a promising solution for energy storage. Herein, trisodium nitrilotriacetate (Na3NTA) as an electrolyte additive is shown to improve the reversibility of the zinc plating–stripping process. NTA3− anions possess the potential not only to substitute water molecules in the solvation sheath of Zn2+ ions but also to construct a zincophilic electrolyte/Zn anode interface and suppress the activity of water molecules for stabilizing the Zn anode. The introduction of Na3NTA can effectively suppress side reactions arising from active water decomposition and simultaneously lead to the formation of a well‐defined (002) texture structure. As a result, a Zn||Zn symmetric cell with a modified electrolyte demonstrates a lifespan of up to 3000 h at a cutoff capacity of 1 mA h cm−2. Furthermore, a Zn||V2O5 full cell exhibits an enhanced capacity retention of 83.2% even after undergoing 8000 cycles. No noticeable dendrites are observed even after long cycles in both symmetric and full cells. Due to the cost‐effective material and ease of fabrication of the Na3NTA additive, this electrolyte strategy may promote the industrial application of aqueous zinc ion batteries. [ABSTRACT FROM AUTHOR]