大学化学 >> 2023, Vol. 38 >> Issue (9): 234-241.doi: 10.3866/PKU.DXHX202212037

化学实验 上一篇    下一篇

锌-二氧化锰锌离子电池：一个研究型综合性化学实验的设计与实践

吴兴隆1,2,*(), 吕红艳1, 杜苗1, 王嗣泽1, 王晓彤2, 张凯洋2, 李炜晨1   

  1. 1 东北师范大学化学学院, 长春 130024
    2 东北师范大学紫外光发射材料与技术教育部重点实验室, 长春 130024
  • 收稿日期:2022-12-18 录用日期:2023-01-16 发布日期:2023-09-21
  • 通讯作者: 吴兴隆 E-mail:xinglong@nenu.edu.cn
  • 基金资助:
    国家自然科学基金重大研究计划(91963118)

Zn-Ion Batteries with Zn Anodes and MnO2 Cathodes: Design and Practice of a Comprehensive Chemistry Experiment

Xinglong Wu1,2,*(), Hongyan Lü1, Miao Du1, Size Wang1, Xiaotong Wang2, Kaiyang Zhang2, Weichen Li1   

  1. 1 Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
    2 MOE Key Laboratory for UV Light-Emitting Materials and Technology, Northeast Normal University, Changchun 130024, China
  • Received:2022-12-18 Accepted:2023-01-16 Published:2023-09-21
  • Contact: Xinglong Wu E-mail:xinglong@nenu.edu.cn

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摘要：

面向国家“双碳战略”需求，结合科技前沿和高校学生科研实践，设计了以低成本和高安全性为主要优势的锌-二氧化锰(Zn-MnO2)二次电池，并形成了一个标准化的物理化学综合实验。本实验首先通过水热法制备了α-MnO2，采用X射线衍射和扫描电子显微镜对制得α-MnO2的结构与形貌进行了表征，随后使用电池测试仪对锌片负极与α-MnO2正极组装成的Zn-MnO2锌离子电池进行了循环伏安、倍率和循环稳定性等电化学性能测试。该实验将科研热点转化为综合教学实验，从实验室走进日常生活，集化学材料合成、表征与电池电化学性能测试于一体，实验的不同模块可满足多种教学需求。此外，探究式学习与综合性操作相结合有助于提高学生的实验兴趣及化学实验操作水平；在教学过程中融入思政元素，渗透绿色理念，引导学生形成安全无污染的化学实验意识和可持续发展思想。

关键词: 锌离子电池, 综合化学实验, 锌, 二氧化锰, 电化学性能

Abstract:

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.

Key words: Zn-Ion batteries, Comprehensive chemistry experiment, Zinc, MnO2, Electrochemical properties