Electrochemical characterization of P2-type layered Na2/3Ni1/4Mn3/4O2 cathode in aqueous hybrid sodium/lithium ion electrolyte

被引：27
作者：
Yu, Feng [1 ,2 ]
Zhang, Shuming [1 ,2 ]
Fang, Chen [3 ]
Liu, Yu [1 ,4 ]
He, Shiyang [1 ]
Xia, Ji [1 ]
Yang, Jianhua [1 ]
Zhang, Na [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] SMEPC, State Grid Elect Power Res Inst, Shanghai, Peoples R China
[4] Shanghai Elect Sodium Sulfur Batteries Energy Sto, Shanghai, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2017年 / 43卷 / 13期
关键词：
Aqueous batteries; Hybrid ion electrolyte; Layered Na2/3Ni1/4Mn3/4O2; POSITIVE ELECTRODE; SODIUM; BATTERIES; ANODE; NATI2(PO4)(3); PERFORMANCE; NA4MN9O18; CARBON;
D O I：
10.1016/j.ceramint.2017.05.007
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
P2-type layered Na2/3Ni1/4Mn3/4O2 has been synthesized by a solid-state method and its electrochemical behavior has been investigated as a potential cathode material in aqueous hybrid sodium/lithium ion electrolyte by adopting activated carbon as the counter electrode. The results indicate that the Na+/Li+ ratio in aqueous electrolyte has a strong influence on the capacity and cyclic stability of the Na2/3Ni1/4Mn3/4O2 electrode. Increase on the Li+ content leads to a shift of the redox potential towards a high value, which is favorable for the improvement of the working voltage of the layered material as cathode. It is found that the coexistence of Na+ and Li+ in aqueous electrolyte can improve the cyclic stability for the Na2/3Ni1/4Mn3/4O2 electrode. A reversible capacity of 54 mAh g(-1) was obtained with a high cyclability as the Na+/Li+ ratio was 2:2. Furthermore, an aqueous hybrid ion cell was assembled with the as-proposed Na2/3Ni1/4Mn3/4O2 as cathode and NaTi2(PO4)(3)/graphite synthesized in this work as anode in 1 M Na2SO4/Li2SO4 (mole ratio as 2:2) mixed electrolyte. The cell shows an average discharge voltage at 1.2 V, delivering an energy density of 36 Wh kg(-1) at a power density of 16 W kg(-1) based on the total mass of the active materials.
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收藏
页码：9960 / 9967
页数：8
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