Our research is directed toward the development of multivalent and aqueous-ion batteries, including Zn-, Al-, Na-, K-, and related aqueous rechargeable battery systems, for safe, low-cost, and sustainable energy storage applications. These battery technologies offer significant advantages such as high safety, environmental compatibility, fast ion transport, and practical scalability. We focus on the design of advanced cathode, electrolyte, and anode materials to achieve high energy density, high capacity, and ultra-stable electrochemical performance. In particular, our work emphasizes the development of robust cathode materials with improved structural stability, ion-storage capability, and cycling durability under aqueous operating conditions. We are also actively engaged in electrolyte engineering to regulate ion transport and improve electrode–electrolyte interfacial stability, which is essential for enhancing battery efficiency and long-term performance. On the anode side, we work on strategies to stabilize metal electrodes, suppress dendrite formation, corrosion, and parasitic side reactions, and improve reversibility and cycling life in aqueous battery systems.