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Copyright of Journal of Petrochemical Universities / Shiyou Huagong Gaodeng Xuexiao Xuebao is the property of Journal Editorial Department Of Liaoning Shihua University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Computer Engineering & Applications is the property of Beijing Journal of Computer Engineering & Applications Journal Co Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Aiming at the demand of the "dual carbon strategy", we have designed an inexpensive and highly safe zinc-manganese dioxide (Zn-MnO2) secondary batteries, and formed a standardized comprehensive physical chemistry experiment. Herein, α-MnO2 was prepared firstly using a hydrothermal method. After that, the structure and morphology of α-MnO2 were characterized using X-ray diffraction and scanning electron microscopy. Furthermore, the Zn-MnO2 secondary batteries were prepared using α-MnO2 cathodes and Zn flake anodes, and the electrochemical performance was evaluated using cyclic voltammetry, rate, and long cycling experiments. We believe that this experiment can promote transformation of popular research topics into comprehensive teaching experiments and facilitate implementation of laboratory findings into daily life. Moreover, by integrating chemical material synthesis with characterization and electrochemical performance testing, modular teaching can be used to meet various teaching and learning styles. In addition, the combination of inquiry-based learning and comprehensive experiments can improve students' interest and hands-on activities. Our approach integrates ideological and political elements, highlights the green chemistry concept, increases students' awareness of safe and pollution-free chemical experiments, and promotes the idea of sustainable development. [ABSTRACT FROM AUTHOR]