High-performance aqueous sodium-ion batteries with K0.27MnO2 cathode and their sodium storage mechanism

作者：Liu, Yang; Qiao, Yun; Zhang, Wuxing^*; Xu, Henghui; Li, Zhen; Shen, Yue; Yuan, Lixia; Hu, Xianluo; Dai, Xiang; Huang, Yunhui

来源：Nano Energy, 2014, 5: 97-104.

DOI：10.1016/j.nanoen.2014.02.010

• Sodium-ion batteries
• K0.27MnO2
• Cathode material
• Full cell
• Mechanism

Hierarchical layered K0.27MnO2 microflowers are firstly synthesized via a facile and efficient route based on a topochemical reaction process. As cathode materials for aqueous sodium-ion battery, such microflowers exhibit high reversible capacity, long cyclic life and excellent rate capability. After 100 cycles, a reversible capacity of 68.5 mA h g(-1) at a current density of 0.2 A g(-1) is attained in a full cell with K0.27MnO2 as cathode and NaTi2(PO4)(3) as anode. We propose a sodium storage mechanism in K0.27MnO2 by analyzing the evolution of structure and interface during charge/discharge process.

• 出版日期2014-4
• 单位华中科技大学