A Review of Solid Electrolyte Interphases on Lithium Metal Anode. Issue 3 (17th November 2015)

• Record Type: Journal Article
• Authors: Cheng, Xin‐Bing; Zhang, Rui; Zhao, Chen‐Zi; Wei, Fei; Zhang, Ji‐Guang; Zhang, Qiang
• Is Part Of: Advanced science. Volume 3:Issue 3(2016:Mar.)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2015-11-17
• Subjects: solid electrolyte interphase -- energy storage -- lithium metal -- lithium–sulfur batteries -- lithium ion batteries; Science -- Periodicals; 505
• DOI: 10.1002/advs.201500213
• Languages: English
• ISSNs: 2198-3844

Abstract

Abstract : Lithium metal batteries (LMBs) are among the most promising candidates of high‐energy‐density devices for advanced energy storage. However, the growth of dendrites greatly hinders the practical applications of LMBs in portable electronics and electric vehicles. Constructing stable and efficient solid electrolyte interphase (SEI) is among the most effective strategies to inhibit the dendrite growth and thus to achieve a superior cycling performance. In this review, the mechanisms of SEI formation and models of SEI structure are briefly summarized. The analysis methods to probe the surface chemistry, surface morphology, electrochemical property, dynamic characteristics of SEI layer are emphasized. The critical factors affecting the SEI formation, such as electrolyte component, temperature, current density, are comprehensively debated. The efficient methods to modify SEI layer with the introduction of new electrolyte system and additives, ex‐situ‐formed protective layer, as well as electrode design, are summarized. Although these works afford new insights into SEI research, robust and precise routes for SEI modification with well‐designed structure, as well as understanding of the connection between structure and electrochemical performance, is still inadequate. A multidisciplinary approach is highly required to enable the formation of robust SEI for highly efficient energy storage systems. Abstract : Solid electrolyte interphases (SEI) formed on Li metal anodes can inhibit the growth of dendrites, improve Coulombic efficiency, and achieve superior cycling performance in Li metal batteries. Mechanisms of SEI formation and models of SEI structure, as well as progress on the characterization of SEI layers, are summarized. Strategies to achieve stable and robust SEIs in Li metal anodes for cycling efficiency and long cycling life of Li metal batteries are also presented.