填料(材料)
材料科学
聚合物
复合材料
电解质
化学
电极
物理化学
作者
Yongbiao Liu,Song Yang,Yongshang Zhang,Jiande Liu,Lin Li,Linsen Zhang,Lulu Du
出处
期刊:Research Square - Research Square
日期:2024-06-27
标识
DOI:10.21203/rs.3.rs-4558412/v1
摘要
Abstract Solid polymer electrolytes (SPEs) show great promise for high-energy and high-safety lithium metal batteries. However, current SPEs suffer from low ionic conductivity and poor mechanical strength. Herein, the g-C3N4@COF heterojunction filler is constructed for SPEs for fast Li+ transport and high Li+ transference number. In addition, a robust 3D network is fabricated by using g-C3N4@COF heterojunction filler in order to further improve the mechanical robustness and electrochemical stability. As a consequence, the g-C3N4@COF-3D network/polymer electrolyte displays an ionic conductivity of 1.25×10− 4 S cm− 1 at 30℃, an electrochemical window of 5.0 V and the tensile strength of 8.613 MPa. Furthermore, assembled LiFePO4//Li battery with the g-C3N4@COF-3D network/polymer electrolyte presents remarkable cycling stability with capacity retention of 99.71% after 600 cycles. Above results indicate the great potential of the g-C3N4@COF-3D network/polymer electrolyte for advanced energy storage devices.
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