Mg2B2O5 Nanowire Enabled Multifunctional Solid-State Electrolytes with High Ionic Conductivity, Excellent Mechanical Properties, and Flame-Retardant Performance

• DOI: 10.1021/acs.nanolett.8b00659
• Publication Date: 2018-04-25T12:01:46Z
• Authors: Ouwei Sheng; Chengbin Jin; Jianmin Luo; Huadong Yuan; Hui Huang; Yongping Gan; Jun Zhang; Yang Xia; Chu Liang; Wenkui Zhang; Xinyong Tao
• Keywords: Electrochemical window

High ionic conductivity, satisfactory mechanical properties, and wide electrochemical windows are crucial factors for composite electrolytes employed in solid-state lithium-ion batteries (SSLIBs). Based on these considerations, we fabricate Mg2B2O5 nanowire enabled poly(ethylene oxide) (PEO)-based (SSEs). Notably, SSEs have enhanced conductivity a large window. The elevated is attributed to the improved motion of PEO chains increased Li migrating pathway interface between PEO-LiTFSI. Moreover, interaction −SO2− TFSI– anions could also benefit improvement conductivity. In addition, containing nanowires exhibit properties flame-retardant performance, which all superior pristine PEO-LiTFSI electrolyte. When multifunctional paired with LiFePO4 cathodes lithium metal anodes, SSLIBs show better rate performance higher cyclic capacity 150, 106, 50 mAh g–1 under 0.2 C at 50, 40, 30 °C. This strategy employing provides design guidelines assembling high excellent same time.