| 학회 |
한국재료학회 |
| 학술대회 |
2021년 가을 (11/24 ~ 11/26, 경주 라한호텔) |
| 권호 |
27권 2호 |
| 발표분야 |
C. 에너지 재료 분과 |
| 제목 |
The role of Mn2+ additive on the electrochemical reaction of ZnMn2O4 in aqueous zinc-ion battery |
| 초록 |
In the positive electrode of zinc ion battery (ZIB), ZnMn2O4 (ZMO) with high theoretical capacity and voltage is an interesting choice. In this study, we compared the electrochemical activity of ZMO micro cathodes obtained by a simple co-precipitation process in the presence of 0.1 M MnSO4 (MS) solution as a full-time electrolyte, as an additive in zinc sulfate (ZMS) Electrolyte (1M ZnSO4 + 0.1M MnSO4) and non-existent or full-time zinc sulfate (ZS) electrolyte (1M ZnSO4). System studies including ex-situ X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) studies have revealed the reasons why ZMO has excellent stability and high reversibility in the ZMS electrolyte medium. The electrochemical balance between Zn2+ and Mn2+ ions promotes excellent performance. Through the stable Zn2+ (de)intercalation in the body, MnOx is reversibly electrodeposited/dissolved from the Mn2+ additive in the electrolyte to (from) the surface cathode and reversible Zn Insert the undissolved surface MnOx layer. This finding is important because it is contrary to the traditional understanding that the addition of Mn2+ only tends to prevent the dissolution of manganese, thereby promoting the stable cycle life performance of the cathode in the ZIB. |
| 저자 |
Hyeona Park, Mohammad Shamsuddin Ahmed, Ojeong Lee, Hyerim Kim, Seokhun Kim, Jaekook Kim, Jang-Yeon Hwang
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| 소속 |
Chonnam National Univ. |
| 키워드 |
Zinc Secondary Battery |
| E-Mail |
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