Synthesis and Electrochemical Properties of Sodium Manganese-based Oxide Cathode Material for Sodium-ion Batteries

被引：25
|
作者：
Nguyen Van Nghia [1 ]
Ou, Pao-Wei [1 ]
Hung, I-Ming [1 ]
机构：
[1] Yuan Ze Univ, Dept Chem Engn & Mat Sci, Taoyuan 320, Taiwan
来源：
ELECTROCHIMICA ACTA | 2015年 / 161卷
关键词：
Sodium-ion battery; Cathode material; Layered structure; P2-structure; Sodium manganese-based oxides; Solid-state reaction; HIGH-CAPACITY; INTERCALATION; NAXCOO2; NA0.44MNO2; P2-TYPE; STORAGE;
D O I：
10.1016/j.electacta.2015.02.043
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Hexagonal P2-structure sodium manganese-based NaLi0.2Mn0.8O2 oxide is successfully synthesized by a simple conventional solid-state reaction method. XRD analysis reveals that the NaLi0.2Mn0.8O2 material has layered structure, space group P6(3)/mmc, and lattice parameters of a = 2.8616 angstrom, and c = 11.0659 angstrom. Lithium ions can stabilize the P2-structure of sodium manganese-based NaxMnO2 oxides even though the mole ratio of alkali metals to transition metal is as high as 1.5. The NaLi0.2Mn0.8O2 material has a high initial discharge capacity of 241 mAh g(-1) between 1.5-4.5 V at a current density of 26.6 mA g(-1). The structure of the NaLi0.2Mn0.8O2 material is stable over a wide range of sodium concentrations during the charge-discharge process, and capacity retention is 78% after 40 cycles. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：63 / 71
页数：9
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