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

被引：140
作者：
Liu, Yang [1 ]
Qiao, Yun [1 ]
Zhang, Wuxing [1 ]
Xu, Henghui [1 ]
Li, Zhen [1 ]
Shen, Yue [1 ]
Yuan, Lixia [1 ]
Hu, Xianluo [1 ]
Dai, Xiang [2 ]
Huang, Yunhui [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China
[2] Enpower Energy Corp, Nantong 226012, Jiangsu, Peoples R China
来源：
NANO ENERGY | 2014年 / 5卷
关键词：
Sodium-ion batteries; K0.27MnO2; Cathode material; Full cell; Mechanism; LONG CYCLE LIFE; N-DOPED CARBON; ANODE MATERIAL; ELECTRODE MATERIAL; ENERGY-STORAGE; BIRNESSITE; NANOSHEETS; OXIDE; POWER; MNO2;
D O I：
10.1016/j.nanoen.2014.02.010
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：97 / 104
页数：8
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