Nicotinamide Solid Cosolvent Enhanced Two-Electron Zinc Peroxide Chemistry for Stable Neutral Zinc-Air Batteries

作者：Nuo Chen, Jingning Lai, Fengling Zhang, Wen Sun, Bohua Li, Lipu Sun, Zhan Yu, Jixiang Wang, Nan Chen, Li Li, Feng Wu, Renjie Chen · 发表于：Nano Letters · 年份：2025 · DOI：10.1021/acs.nanolett.5c01562 · 被引用次数：9 · 研究领域：Advanced battery technologies research、Electrocatalysts for Energy Conversion、Perovskite Materials and Applications

Zinc-air batteries (ZABs) are promising energy storage systems due to their high energy density and sustainability. Neutral electrolytes effectively address the CO 2 sensitivity and zinc corrosion issues in alkaline systems but face challenges such as hydrogen evolution reactions (HER) and sluggish oxygen reduction and evolution reactions (ORR/OER) dynamics. Herein, we introduce nicotinamide (NAM), a solid cosolvent with high donor number (DN) and acceptor number (AN) in neutral electrolyte. Due to its high DN, NAM readily coordinates with Zn 2+ to weaken H 2 O’s dominance in the primary solvation sheath, reducing the required zinc salt concentration. NAM’s strong hydrogen bonding with H 2 O limits water mobility, suppressing HER and zinc corrosion. Its high AN enhances O 2 – affinity, enabling efficient two-electron zinc peroxide (ZnO 2 ) chemistry. These advancements lead to remarkable stability, including nearly 2000 h in symmetric cells and 560 h in ZABs. Our electrolyte design highlights the potential of advancing neutral ZAB technology.