Designing Advanced In Situ Electrode/Electrolyte Interphases for Wide Temperature Operation of 4.5 V Li||LiCoO2 Batteries. Issue 49 (4th November 2020)

• Record Type: Journal Article
• Authors: Ren, Xiaodi; Zhang, Xianhui; Shadike, Zulipiya; Zou, Lianfeng; Jia, Hao; Cao, Xia; Engelhard, Mark H.; Matthews, Bethany E.; Wang, Chongmin; Arey, Bruce W.; Yang, Xiao‐Qing; Liu, Jun; Zhang, Ji‐Guang; Xu, Wu
• Is Part Of: Advanced materials. Volume 32:Issue 49(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-11-04
• Subjects: cathode/electrolyte interphases -- ether electrolytes -- high‐voltage LiCoO2 -- lithium metal batteries; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.202004898
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract: High‐energy‐density batteries with a LiCoO2 (LCO) cathode are of significant importance to the energy‐storage market, especially for portable electronics. However, their development is greatly limited by the inferior performance under high voltages and challenging temperatures. Here, highly stable lithium (Li) metal batteries with LCO cathode, through the design of in situ formed, stable electrode/electrolyte interphases on both the Li anode and the LCO cathode, with an advanced electrolyte, are reported. The LCO cathode can deliver a high specific capacity of ≈190 mAh g −1 and show greatly improved cell performances under a high charge voltage of 4.5 V (even up to 4.55 V) and a wide temperature range from −30 to 55 °C. This work points out a promising approach for developing Li||LCO batteries for practical applications. This approach can also be used to improve the high‐voltage performance of other batteries in a broad temperature range. Abstract : High‐voltage LiCoO2 cathodes are highly desirable for various energy‐storage applications, especially when coupled with lithium metal anodes. Fluorine‐rich electrode/electrolyte interphases in situ formed in an advanced ether electrolyte are found to enable highly stable cell cycling under elevated temperatures. Such interphases effectively suppress electrolyte side reactions and preserve the integrity of both cathode and anode materials.