Zuo Linqing, Sun Haodong, Yuan Xinhai, Wen Juan, Chen Xi, Zhou Shiyu, Wu Yuping, van Ree Teunis
China State Key Laboratory of Materials-Oriented Chemical Engineering, Institute of Advanced Materials (IAM), School of Energy Science and Engineering, Nanjing Tech University, Nanjing 210009, China.
Department of Chemistry, University of Venda, Thohoyandou 0950, South Africa.
Materials (Basel). 2021 Aug 27;14(17):4895. doi: 10.3390/ma14174895.
The Zn/MnO battery is a promising energy storage system, owing to its high energy density and low cost, but due to the dissolution of the cathode material, its cycle life is limited, which hinders its further development. Therefore, we introduced agar as a microskin for a MnO electrode to improve its cycle life and optimize other electrochemical properties. The results showed that the agar-coating layer improved the wettability of the electrode material, thereby promoting the diffusion rate of Zn and reducing the interface impedance of the MnO electrode material. Therefore, the Zn/MnO battery exhibited outstanding rate performance. In addition, the agar-coating layer promoted the reversibility of the MnO/Mn reaction and acted as a colloidal physical barrier to prevent the dissolution of Mn, so that the Zn/MnO battery had a high specific capacity and exhibited excellent cycle stability.
锌/二氧化锰电池是一种很有前景的储能系统，因其具有高能量密度和低成本，但由于正极材料的溶解，其循环寿命有限，这阻碍了它的进一步发展。因此，我们引入琼脂作为二氧化锰电极的微表皮，以提高其循环寿命并优化其他电化学性能。结果表明，琼脂涂层提高了电极材料的润湿性，从而促进了锌的扩散速率并降低了二氧化锰电极材料的界面阻抗。因此，锌/二氧化锰电池表现出出色的倍率性能。此外，琼脂涂层促进了二氧化锰/锰反应的可逆性，并作为一种胶体物理屏障防止锰的溶解，使得锌/二氧化锰电池具有高比容量并表现出优异的循环稳定性。
