中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 35 No. 5 May 2025 |
（1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. Kunming Branch of the 705 Research Institute, China State Shipbuilding Corporation Limited, Kunming 650032, China;
3. Institute of Systems Engineering, Academy of Military Sciences, Beijing 102300, China;
4. Hunan Hydro Dynamic New Materials Co., Ltd., Xiangtan 411101, China;
5. Hunan Center Special Metallurgy Novel Materials Research Institute, Changsha 410012, China;
6. Zijin Mining Group Co., Ltd., Xiamen 361008, China）
Abstract:To improve the slow kinetics and poor mechanical strength of aqueous silver peroxide-aluminum (AgO-Al) battery cathode materials, the effects of different binders including polytetrafluoroethylene (PTFE) and polyvinylpyrrolidone (PVP) on the AgO cathode material were investigated. The samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), cyclic voltammetry (CV), electrochemical impedance spectrum (EIS), and galvanostatic discharge. In contrast to the pure AgO and AgO-PTFE electrodes, the results demonstrated that the PVP effectively bound the electrode materials together. The prepared AgO-PVP as the cathode material of AgO-Al batteries could improve the battery capacity, exhibiting a high specific capacity (389.95 mA·h/g at 500 mA/cm2), a high operating voltage (1.75 V at 500 mA/cm2), a maximum energy density (665.65 W·h/kg), and a maximum power density (5236 W/kg). Furthermore, the electrochemical mechanism of the AgO-PVP cathode material was examined, revealing that the electrode exhibited rapid ion diffusion and effective interfacial ion/electron transport.
Key words: AgO; cathode material; high specific capacity; binder; aqueous AgO-Al batteries
