Boosting Aqueous Zn²⁺ Storage in 1,4,5,8‐Naphthalenetetracarboxylic Dianhydride through Nitrogen Substitution

Abstract

Abstract The research of organic materials thrives for lithium‐ion and sodium‐ion batteries but lacks for aqueous Zn 2+ batteries. Herein, we prepared 1,4,5,8‐naphthalene diimide (NTCDI), which is derived from 1,4,5,8‐naphthalenetetracarboxylic dianhydride, through nitrogen substitution with the assistance of ammonia solution. NTCDI is first applied in aqueous Zn 2+ batteries, which can give a high reversible capacity of 240 mAh g −1 at 0.1 A g −1 . The electrochemical kinetics analysis indicates that the diffusion‐control process dominates in the electrode reaction. NTCDI can keep 73.7 % of the initial capacity of 152 mAh g −1 after 2000 continuous charge/discharge cycles at 1 A g −1 , showing great potential for zinc storage.