Authors: Wei Shang, Yue Liu, Yan‐Ning Liu, Jia‐Lin Yang, Han‐Hao Liu, Hong Yu, Jun‐Ming Cao, Xing‐Long Wu
Published: 2025-03-17
Source: Full article
Abstract3D accessible Mn‐based Prussian blue analogues (PBAs) framework shows great potential in serving as host for carriers. However, their inevitable Jahn–Teller distortion (JTD) induced by Mn3+ ions bring uncertainty for structural and phase‐change robustness during carrier reversible intercalation, particularly for highly charged Al3+ ions with strong Coulombic interaction. Herein, a cationic vacancy design on Mn sites (VMn) is proposed for high‐performance Al3+ reversible storage. By virtue of low‐cost Na2EDTA molecules, the introduction of VMn, the undesired JTD, and corresponding phase‐change can be well‐suppressed. As a result, the enhanced structural robustness of PBAs framework exhibits excellent long‐term cyclic stability and favorable intercalation energies for reversible Al3+ ions storage. In addition, as‐assembled MoO3//VMn‐PBAs full cell batteries can operate in a wide temperature range from −15 to 50 °C, without any additives in aqueous electrolyte. This work highlights the comprehensive availability of cationic vacancy strategy and aqueous Al‐ion batteries within a wide range of ambinent temperature, further, providing novel sight for sustainable development for next‐generation energy storage technique.