Solid‐State Plastic Crystal Electrolytes: Effective Protection Interlayers for Sulfide‐Based All‐Solid‐State Lithium Metal Batteries. (6th May 2019)

• Record Type: Journal Article
• Authors: Wang, Changhong; Adair, Keegan R.; Liang, Jianwen; Li, Xiaona; Sun, Yipeng; Li, Xia; Wang, Jiwei; Sun, Qian; Zhao, Feipeng; Lin, Xiaoting; Li, Ruying; Huang, Huan; Zhang, Li; Yang, Rong; Lu, Shigang; Sun, Xueliang
• Is Part Of: Advanced functional materials. Volume 29:Number 26(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-05-06
• Subjects: all‐solid‐state lithium metal batteries -- Li metal -- plastic crystal electrolytes -- sulfide electrolytes; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.201900392
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: All‐solid‐state lithium metal batteries (ASSLMBs) have attracted significant attention due to their superior safety and high energy density. However, little success has been made in adopting Li metal anodes in sulfide electrolyte (SE)‐based ASSLMBs. The main challenges are the remarkable interfacial reactions and Li dendrite formation between Li metal and SEs. In this work, a solid‐state plastic crystal electrolyte (PCE) is engineered as an interlayer in SE‐based ASSLMBs. It is demonstrated that the PCE interlayer can prevent the interfacial reactions and lithium dendrite formation between SEs and Li metal. As a result, ASSLMBs with LiFePO4 exhibit a high initial capacity of 148 mAh g −1 at 0.1 C and 131 mAh g −1 at 0.5 C (1 C = 170 mA g −1 ), which remains at 122 mAh g −1 after 120 cycles at 0.5 C. All‐solid‐state Li‐S batteries based on the polyacrylonitrile‐sulfur composite are also demonstrated, showing an initial capacity of 1682 mAh g −1 . The second discharge capacity of 890 mAh g −1 keeps at 775 mAh g −1 after 100 cycles. This work provides a new avenue to address the interfacial challenges between Li metal and SEs, enabling the successful adoption of Li metal in SE‐based ASSLMBs with high energy density. Abstract : A solid‐state plastic crystal electrolyte enables the successful adoption of Li metal in sulfide electrolyte‐based all‐solid‐state lithium metal batteries by suppressing the interfacial reactions and Li dendrite formation between Li metal and Li10 GeP2 S12 . As a result, both all‐solid‐state lithium‐ion batteries and lithium‐sulfur batteries are demonstrated with superb electrochemical performance.