Zinc-ion batteries are regarded as one of the most promising electrochemical energy storage systems in the realm of energy storage, owing to their high cost-effectiveness and robust safety features. Nevertheless, the advancement of zinc-ion batteries employing metallic zinc anodes has been impeded by challenges such as hydrogen evolution, dendrite formation, significant side reactions, low coulombic efficiency, and unstable cycling performance. In this research, a nitrogen-doped polyimide-derived carbon (NPC) protective layer was synthesized through the spraying of commercial zinc metal. The unique nitrogen-doped structure of NPC provides excellent structural stability and flame retardancy; furthermore, its high ionic conductivity significantly enhances the uniform deposition of zinc ions at the interface while improving the stability of the solid electrolyte/anode interface. A symmetric battery utilizing Zn@NPC as an anode demonstrated operational longevity exceeding 1000 hours under both low (1 mA cm–2) and high (1 mA cm–2) current densities. Additionally, the V2O5//Zn@NPC full cell exhibited a specific capacity at 405.6 mAh g–1 with a coulombic efficiency of 99.89 % at a current density of 1 A g–1. These findings underscore the substantial potential for modified zinc anodes in enhancing performance within zinc-ion batteries.

中文翻译：

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用于无枝晶锌金属负极的 N 掺杂聚酰亚胺衍生碳保护涂层保护层


锂离子电池因其高成本效益和强大的安全性而被认为是储能领域最有前途的电化学储能系统之一。然而，采用金属锌负极的锌离子电池的发展受到诸如析氢、枝晶形成、显着的副反应、低库仑效率和不稳定的循环性能等挑战的阻碍。在这项研究中，通过商业锌金属的喷涂合成了氮掺杂聚酰亚胺衍生的碳 （NPC） 保护层。NPC 独特的氮掺杂结构提供了优异的结构稳定性和阻燃性;此外，其高离子电导率显著增强了锌离子在界面处的均匀沉积，同时提高了固体电解质/阳极界面的稳定性。以 Zn@NPC 为阳极的对称电池在低电流密度 （1mAcm ^–2 ） 和高电流密度 （1mAcm ^–2 ） 下均表现出超过 1000 小时的使用寿命。此外，V ₂ O ₅ //Zn@NPC 全电池在 1Ag 的电流密度下表现出 405.6 mAh g ^–1 的比容量和 99.89% 的库仑效率 ^–1 。这些发现强调了改性锌负极在提高锌离子电池性能方面的巨大潜力。