文章信息/Info

Title:

Novel Secondary Battery Based on Chloride Ion Transfer

作者:

趙相玉; 沈曉冬

南京工業大學材料科學與工程學院

Author(s):

ZHAO Xiangyu; SHEN Xiaodong

College of Materials Science and Engineering，Nanjing Tech University

關鍵詞:

二次電池; 氯離子電池; 金屬氯化物; 金屬氯氧化物; 電化學性能

DOI:

10.7502/j.issn.1674-3962.2015.11.07

文獻標志碼:

A

摘要:

二次電池的研究熱點主要集中在基于陽離子傳輸的電化學體系上，如Li+、Na+、Mg2+等電池。氯離子電池是作者提出的一種基于陰離子傳導的新型二次電池。正極材料為過渡族或部分主族的金屬氯化物或金屬氯氧化物，負極為堿金屬、堿土金屬或稀土金屬，電解液為可傳輸氯離子的復合離子液體。其電極體系的理論能量密度高于當前鋰離子電池體系，可達2 500 Wh/l；而且該體系可不用Li，以具有豐富儲量的元素（如Mg，Ca，稀土等）作為負極材料。大多數過渡族的金屬氯化物為路易斯酸，能夠不同程度地和含有氯離子的路易斯堿發生反應，生成可溶于電解液中的絡合離子。抑制金屬氯化物的脫溶和開發新型高穩定性電極材料是實現氯離子電池應用的關鍵點之一。介紹了氯離子電池的概念、基本原理，闡述了金屬氯（氧）化物/金屬和多電子金屬氯氧化物/鎂電極體系

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.