A Three-Dimensional Fiber-Network-Reinforced Composite Solid-State Electrolyte from Waste Acrylic Fibers for Flexible All-Solid-State Lithium Metal Batteries

The large amount of waste chemical fiber textiles thatexists hasposed pressure on the sustainable development of the natural environmentand of society. Therefore, it is of great importance to increase theadded value of waste chemical fiber textiles and expand their applicationsin other fields. Herein, acrylic yarn from waste clothing is usedas the raw material to construct a three-dimensional (3D) acrylic-basedceramic composite nanofiber solid electrolyte. The electrochemicalproperties of batteries based on this solid electrolyte are also investigated.We found that the fabricated composite electrolyte has good performancein lithium ion conduction and electrochemical stability because ofits 3D acrylic-based ceramic composite fiber framework. The introductionof this composite electrolyte to a lithium symmetric battery enabledthe battery to circulate stably for 2350 h at 50 & DEG;C without short-circuiting.In addition, all-solid-state batteries using a LiFePO4 cathodeexhibited high reversible capacity. Lastly, a flexible lithium metalpouch battery was able to operate safely and stably under extremeconditions. This work demonstrates a strategy for upcycling wastetextiles into ion-conducting polymers for energy storage applications.