A high-capacity of oxygen induced SrTiO3 cathode material for rechargeable Alkaline Zinc battery

• Main Authors: Wong, Christelle Pau Ping, Lai, Chin Wei, Lee, Kian Mun, Pan, Guan Ting, Chong, Kok Boon, Johan, Mohd Rafie, Juan, Joon Ching, Yang, Thomas Chung Kuang
• Format: Article
• Published: Elsevier 2021
• Subjects: QD Chemistry; TP Chemical technology
• Online Access: http://eprints.um.edu.my/25937/; https://doi.org/10.1016/j.mssp.2021.105802

The tremendously usage in batteries has led to development of safe, economical and environment friendly batteries. Therefore, the progress to explore new type of battery such as rechargeable alkaline zinc batteries (RAZBs) based on metal oxides has attracted many interests. In this study, RAZBs based on SrTiO3 nanoparticles as cathode is successfully produced and also managed to generate high specific volume capacity of 387 mAh cm−3 at 1.2 V. Based on the total volume of battery, the energy density of the battery is 37 mWh cm−3. The SrTiO3 prepared via facile hydrothermal process exhibits large specific surface area. Besides the surface area, the presence of oxygen vacancies (Vo¨) in SrTiO3 is also contributed to the high electron contact efficiency. The presence of Vo¨ play an important role in the redox property and rechargeability of SrTiO3 as cathode. The RAZBs based on SrTiO3 nanoparticles shows a good cycling performance and achieve 100% coulombic efficiency. In conclusion, the new cathode material based on SrTiO3 create new possibilities for RAZBs. © 2021