水系锌离子电池MnOx正极材料在储锌过程中由于Jahn-Teller效应引起的Mn溶解，而导致循环稳定性衰减的问题是其商业化应用的主要障碍之一。本项目将从体相“加固”和界面“巩固”两方面来抑制Mn溶解，提升循环稳定性。一方面，通过缺陷工程（O/Mn空位和过渡金属掺杂）改性MnOx提升其结构稳定性进行体相“加固”，来抑制Mn溶解从而提高循环稳定性；并阐明缺陷态的“固锰”贡献机制。另一方面，进行电解液添加剂的适配优化实现电极/电解液的界面“巩固”，通过添加合适的Mn2+盐来抑制Mn溶解的化学势，和添加缓冲剂在界面处将不利的副产物调控为有利的SEI膜以进一步抑制Mn溶解，以提升循环稳定性；并确立电解液优化在界面处的“固锰”调控机理。最后，研究体相“加固”与界面“巩固”的协同机制，为高性能MnOx正极材料体系的研发提供新思路，为实现水系可充电锰基锌离子电池的商业化应用提供理论和技术支持。

The attenuation of cycle stability due to the dissolution of Mn caused by Jahn Teller effect in the zinc storage process, is one of the main obstacles to the commercial application of the MnOx cathode materials for aqueous zinc ion batteries. This project will inhibit the dissolution of Mn from the two aspects of the bulk phase “strengthening” and the interface “consolidation” to improve the cycle stability. . On the one hand, MnOx is modified by defect engineering (O/Mn vacancy and transition metal doping) to improve its structural stability and realize its bulk phase "strengthening", which inhibits Mn dissolution and improve cyclic stability. Based on this, the contribution mechanism of "Strengthened Mn" can be also expounded at the defect states in zinc storage process.. On the other hand, the electrode/electrolyte interface "consolidation" will be carried out by optimization of electrolyte additives. The cycle stability is improved by adding Mn2+ salt appropriately to inhibit the chemical potential of Mn dissolution, and adding buffer to regulate the adverse by-products into a favorable SEI at the interface to further inhibit Mn dissolution. And then, the "consolidated Mn" regulation mechanism of electrolyte optimization at the electrode/electrolyte interface is established.. Finally, the collaborative mechanism of bulk phase "strengthening" and interface "consolidation" is studied. This project will provide new ideas for the research and development of high-performance MnOx cathode materials, and provides theoretical and technical support for the commercial application of aqueous rechargeable manganese-based zinc ion batteries.