Microfluidic‐Assisted 3D Printing Zinc Powder Anode with 2D Conductive MOF/MXene Heterostructures for High‐Stable Zinc−Organic Battery
Hongyu Lu, Jisong Hu, Kaiqi Zhang, Jingxin Zhao, Shenzhen Deng, Yujie Li, Bingang Xu, Huan Pang
Abstract
Abstract Zinc powder (Zn‐P) anodes have significant advantages in terms of universality and machinability compared with Zn foil anodes. However, their rough surface, which has a high surface area, intensifies the uncontrollable growth of Zn dendrites and parasitic side reactions. In this study, an anti‐corrosive Zn‐P‐based anode with a functional layer formed from a MXene and Cu‐THBQ (MXene/Cu‐THBQ) heterostructure is successfully fabricated via microfluidic‐assisted 3D printing. The unusual anti‐corrosive and strong adsorption of Zn ions using the MXene/Cu‐THBQ functional layer can effectively homogenize the Zn ion flux and inhibit the hydrogen evolution reaction (HER) during the repeated process of Zn plating/stripping, thus achieving stable Zn cycling. Consequently, a symmetric cell based on Zn‐P with the MXene/Cu‐THBQ anode exhibits a highly reversible cycling of 1800 h at 2 mA cm −2 /1 mAh cm −2 . Furthermore, a Zn‐organic full battery matched with a 4‐hydroxy‐2,2,6,6‐tetramethylpiperidine‐1‐oxyl organic cathode riveted on graphene delivers a high reversible capacity and maintains a long cycle life.