铝离子电池由于铝在地壳中储量丰富、价格低廉且使用安全等特点被认为是最有潜力的下一代二次电池，在能源储存方面具有重要科研价值和应用前景。目前限制其发展至关重要的因素是铝离子电池的比容量和能量密度低，原因主要是铝离子或聚铝阴离子与正极材料间的静电效应大，引起Al3+或[AlxMy]n-嵌入脱出正极材料困难，造成正极材料利用率低。因此，本申请项目通过调控电解质中阴阳离子成分，解析传递电荷离子的离子半径和电荷密度与正极材料之间静电效应耦合关系，通过预嵌锂或预氧化对正极材料进行微观结构调控，研究其对电化学性能的影响规律。在此基础上，结合软硬酸碱理论对电极材料进行卤族元素改性处理，研究卤族元素在电极材料中的占位及与Al3+或[AlxMy]n-的结合形式和稳定性，揭示电极材料与Al3+或[AlxMy]n-之间的静电效应及充放电过程中能量垒的变化规律等基础科学问题，为铝离子电池工业化生产提供理论基础。

The aluminum ion battery is becoming the most promising next generation secondary battery because of its abundant reserves in the earth's crust, low cost, safe use of aluminium (Al) and shows important scientific research value and application prospect in energy storage. However, the further development of this battery has been districted by low specific capacity and low energy density of positive materials, which is mainly caused by the Al3+ or [AlxMy]n- insertion and extraction from the positive materials difficulties because of the large electrostatic effect between aluminum ion or poly aluminum anion and the cathode material, leading to low utilization rate of cathode material. Therefore, the project aims to explain the electrostatic coupling relationship between the ionic radius and charge density of charge transfer ion and positive material by controlling the composition of anion and cation in electrolyte, and study its influence on the electrochemical performance by adjusting the microstructure of the positive material in the form of pre-intercalation lithium or pre-oxidation. Based on above, we modify electrode material with halogen elements according to the theory of Hard-Soft-Acid-Base (HSAB), thus the halogen element occupying in the electrode material and the form and stability between it and Al3+ or [AlxMy]n- were investigated, and the basic scientific problems of electrostatic effect between the electrode materials and the Al3+ or [AlxMy]n- and the variation of energy barrier during charging and discharging were revealed, which will provide theoretical guarantee for industrial production of aluminum ion batteries.