Easy-to-Lay Poly-N Heterocyclic Additives Enable Long-Term Stabilization of Zinc-Ion Capacitor Anodes under Deep Plating/Stripping.

ABSTRACT: Addition of organic compounds containing O/N heteroatoms to aqueous electrolytes such as ZnSO₄ (ZS) solutions is one of the effective strategies to inhibit Zn anode dendrites and side reactions. However, addressing the stability of Zn plating/stripping at high current densities and areal capacities by this method is still a challenge, especially in capacitors known for high power and long life. Herein, an organic heterocyclic compound of 1, 4, 7, 10-tetraazacyclododecane (TC) containing four symmetrically distributed N atoms is employed as ZS additive, expanding the life of Zn anodes from ≈ 30 h to 1000 and 240 h at deep plating/stripping conditions of 10 and 20 mA cm^-2/mAh cm^-2, respectively; the cumulative capacity is as high as 5.0 Ah cm^-2 wit

SUBMITTER: Bu Y 

PROVIDER: S-EPMC11348090 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature