Cu2+掺杂MnO2作为水系锌离子电池正极材料的合成与电化学性能

采用简单的一步电沉积方法制备了Cu²⁺掺杂的MnO₂材料。通过XRD、SEM、TEM等方法对材料进行了表征，结果表明其具有蓬松多孔的纳米结构，作为电池正极材料时有利于Zn²⁺的存储，具有较高的电池容量。与未掺杂样品相比Cu²⁺掺杂的MnO₂材料有更好的电化学性能，在电流密度为200 mA/g时，比容量达到235 mAh/g，增加了47.8%，阻抗也由997.3 Ω降到了564.3 Ω。

Synthesis and electrochemical properties of Cu2+-doped MnO2 as cathode materials for aqueous zinc ion batteries

In this paper, a simple one-step electrodeposition method was used to prepare Cu²⁺-doped MnO₂ materials. A series of examinations such as XRD, SEM and TEM are employed to describe the characteristic of Cu²⁺ doped MnO₂ samples. As a result, the Cu²⁺ doped MnO₂ materials possess a fluffy porous nanostructure and exhibit enhanced electrochemical performance when as a cathode of aqueous zinc ion batteries. In detail, the specific capacity of Cu²⁺ doped MnO₂ samples exhibit 235 mAh/g in 200 mA/g, which is about 47.8% higher than that of pure MnO₂ sample. Furthermore, the impedance of Cu²⁺ doped MnO₂ is also reduced from 997.3 Ω to 564.3 Ω.