Wang Chunhui, Xian Keyi, Zhao Shuangshuang, Yang Lishan, Zhou Junjian, Yang Yahui, Chen Xiangping, Yin Jiang, Wang Jun, Qin Haozhe, Tian Zhongliang, Lai Yanqing, Wang Zhongchang, Zhang Bao, Wang Haiyan
Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research (Ministry of Education of China), National and Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of Resources, Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha, Hunan 410081, People's Republic of China.
College of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan 421001, People's Republic of China.
Nano Lett. 2024 Aug 14;24(32):9816-9823. doi: 10.1021/acs.nanolett.4c01420. Epub 2024 Aug 2.
Component modulation endows Mn-based electrodes with prominent energy storage properties due to their adjustable crystal structure characteristics. Herein, ZnMn(PO)·HO (ZMP·HO) was obtained by a hydration reaction from ZnMn(PO) (ZMP) during an electrode-aging evolution. Benefiting from the introduction of lattice HO molecules into the ZMP structure, the ion transmission path has been expanded along with the extended d-spacing, which will further facilitate the ZMP → ZMP·HO phase evolution and electrochemical reaction kinetics. Meanwhile, the hydrogen bond can be generated between HO and O in PO, which strengthens the structure stability of ZMP·HO and lowers the conversion barrier from ZMP to ZMP·4HO during the Zn uptake/removal process. Thereof, ZMP·HO delivers enhanced electrochemical reaction kinetics with robust structure tolerance (106.52 mA h g at 100 mA g over 620 cycles). This high-energy aqueous Zn||ZMP·HO battery provides a facile strategy for engineering and exploration of high-performance ZIBs to realize the practical application of Mn-based cathodes.
成分调制由于其可调节的晶体结构特性，赋予了锰基电极卓越的储能性能。在此，ZnMn(PO)·HO (ZMP·HO)是在电极老化过程中，通过ZnMn(PO) (ZMP)的水合反应获得的。得益于晶格HO分子引入ZMP结构，离子传输路径随着d间距的增大而扩展，这将进一步促进ZMP → ZMP·HO的相演变和电化学反应动力学。同时，HO与PO中的O之间可形成氢键，增强了ZMP·HO的结构稳定性，并降低了锌吸收/去除过程中从ZMP到ZMP·4HO的转化势垒。因此，ZMP·HO具有增强的电化学反应动力学和强大的结构耐受性（在100 mA g下循环620次，容量为106.52 mA h g）。这种高能水系Zn||ZMP·HO电池为高性能水系锌离子电池的设计与探索提供了一种简便策略，以实现锰基正极的实际应用。
