Potential positive electrodes for high-voltage magnesium-ion batteries

被引:134
作者
Ichitsubo, Tetsu [1 ]
Adachi, Takero [1 ]
Yagi, Shunsuke [1 ]
Doi, Takayuki [2 ]
机构
[1] Kyoto Univ, Dept Mat Sci & Engn, Kyoto 6068501, Japan
[2] Kyoto Univ, Off Soc Acad Collaborat Innovat, Kyoto 6158520, Japan
关键词
ELECTROCHEMICAL INSERTION; LITHIUM; COBALTITE; SPINEL; DIFFUSION;
D O I
10.1039/c1jm11793a
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
Magnesium-ion batteries (MIBs) with a Mg-metal negative electrode are expected to combine high energy density and high electromotive force, owing to the divalent ion careers and its low redox potential. However, it has been reported to date that the cell voltage of MIBs is not high enough (similar to 1.5 V), being far below that of lithium-ion batteries (LIBs) (4-5 V). In this work, we have investigated the potentiality of Mg-Co-O and Mg-Ni-O complex oxides as the positive electrode for MIBs, which are composed of these positive electrodes and a Mg negative electrode in acetonitrile with Mg(ClO(4))(2) salt as an electrolyte. These MIBs can exhibit a relatively high open circuit voltage, OCV, and can light a blue diode after charge. However, as the combination of the acetonitrile electrolyte and metal Mg can yield the passivation on the surface of the Mg electrode, we have also checked these materials for a well-established Li ion battery system, and confirmed that the charged battery can show high OCV. In order to attain such a high cell voltage, it would be significant to exploit the unstabilized ion after charge in the host complex oxide.
引用
收藏
页码:11764 / 11772
页数:9
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