To address the issues in aqueous zinc-ion batteries(ZIBs),including the formation of zinc dendrites and the occurrence of harmful side reactions(e.g.,the hydrogen evolution reaction),which seriously affect the perform...To address the issues in aqueous zinc-ion batteries(ZIBs),including the formation of zinc dendrites and the occurrence of harmful side reactions(e.g.,the hydrogen evolution reaction),which seriously affect the performance of the battery,a sulfonated covalent organic framework(SCOF),TpPa-SO3H,was synthesized and the quasi-solid polymer electrolyte SCOF-PVDF/Zn(CF3SO3)2 was successfully prepared with a polymer matrix of PVDF and an ion-transporting backbone of SCOF.Both of Zn//Zn symmetric batteries and Zn//NH4V4O10 full batteries assembled using SCOF-PVDF/Zn(CF3SO3)2 electrolyte exhibited excellent battery cycling stability.The high ionic conductivity of 3×10^(-4)S·cm^(-1)could be achieved.The assembled symmetric batteries demonstrated a cycle life of 980 h at a current density of 2 mA·cm^(-2).The Zn//NH4V4O10 full battery can provide a specific capacity of 196 mAh·g^(-1)at a high current density of 10 A·g^(-1).展开更多
基金supported by the National Natural Science Foundation of China(22071021).
文摘To address the issues in aqueous zinc-ion batteries(ZIBs),including the formation of zinc dendrites and the occurrence of harmful side reactions(e.g.,the hydrogen evolution reaction),which seriously affect the performance of the battery,a sulfonated covalent organic framework(SCOF),TpPa-SO3H,was synthesized and the quasi-solid polymer electrolyte SCOF-PVDF/Zn(CF3SO3)2 was successfully prepared with a polymer matrix of PVDF and an ion-transporting backbone of SCOF.Both of Zn//Zn symmetric batteries and Zn//NH4V4O10 full batteries assembled using SCOF-PVDF/Zn(CF3SO3)2 electrolyte exhibited excellent battery cycling stability.The high ionic conductivity of 3×10^(-4)S·cm^(-1)could be achieved.The assembled symmetric batteries demonstrated a cycle life of 980 h at a current density of 2 mA·cm^(-2).The Zn//NH4V4O10 full battery can provide a specific capacity of 196 mAh·g^(-1)at a high current density of 10 A·g^(-1).
