College of Materials Science and Engineering，Nanjing Tech University
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DOI:
10.7502/j.issn.1674-3962.2015.11.07
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Abstract:
Hot topics in the field of secondary batteries are focused on the electrochemical systems based on cation transfer，such as LIB，NIB and MB. Chloride ion battery (CIB) proposed by the author is a kind of novel battery based on chloride ion transfer. The corresponding cathode materials are metal chlorides with the metals listed in transition group or part of main group；the anode materials are alkali metals，alkaline-earth metals or rare-earth metals；the electrolyte is the ionic liquid composite allowing chloride ion transfer. CIB shows theoretical energy densities which are above those of the current lithium ion battery and up to 2 500 Wh/l. The use of Li as anode is unnecessary and various abundant materials such as Mg，Ca or rare-earth metals could be used as anode. Most transition-metal chlorides are Lewis acids，which can react with a Lewis base that contains chloride ions，resulting in the formation of soluble complex ions. A key challenge to achieve application of CIB is to suppress this dissolution and develop new electrode materials with high stability. Herein，we report the concept and the principles of CIB. Metal chloride/metal，metal oxychloride/metal and multi-electron metal oxychloride/magnesium electrode systems are elaborated.