Interconnected ion-conducting and mechanical framework silica aerogel for fast ion conduction and highly stable lithium-ion batteries
발표자
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초록
내용
Our research introduces a novel approach to developing highly stable lithium-ion batteries. We have incorporated an interconnected ion-conducting mechanical framework of silica aerogel (SA) into polymer electrolytes. This strategy leverages the continuous network and mechanical strength of SA to regulate ion transport, providing high conductivity and creating a compact solid electrolyte interface layer, thus effectively suppressing dendrite growth. We prepared a hybrid polymer electrolyte by functionalizing SA with a vinyl group and grafting the weak binding monomer of LiMTFSI and TFSI zwitterion. Our hybrid SPEs exhibit high ionic conductivity of 6.5x10-4 S/cm with a Li transfer number of 0.83. The assembled LFP coin-cell delivered a highly stable electrochemical performance with a discharge capacity of 138 mAh/g at 0.2C and a stable rate capability of up to 5C. Furthermore, the Li symmetric cell shows high cyclic stability 4000h under 0.1mA/cm2