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首页> 外文期刊>Advanced functional materials >Phosphorus-Fixed Stable Interfacial Nonflammable Gel Polymer Electrolyte for Safe Flexible Lithium-Ion Batteries
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Phosphorus-Fixed Stable Interfacial Nonflammable Gel Polymer Electrolyte for Safe Flexible Lithium-Ion Batteries

机译：Phosphorus-Fixed Stable Interfacial Nonflammable Gel Polymer Electrolyte for Safe Flexible Lithium-Ion Batteries

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A high content of flame retardant in non-combustible electrolytes leads todeterioration of the electrochemical performance of lithium-ion batteries(LIBs). Besides, fire hazard of most non-flammable electrolytes is studiedin coin cell, for which it is impossible to reveal real performance. Thus, thestable interfacial, phosphorus-fixed nonflammable gel polymer electrolyte(GPE) with low content of flame retardant (7.5 wt.%) has been designedby in situ polymerization of tri(acryloyloxyethyl) phosphate and triethyleneglycol dimethacrylate in electrolyte. After being heated by fire for>10 s, the GPE is still not ignited. The average capacity attenuation rate ofgraphite//GPE//Li (0.008%) is much lower than that of the liquid electrolyte(0.039%). Besides, the nonflammable GPE based pouch cell with goodflexibility and excellent fire safety is prepared. No fire, no thermal runawayand no electrolyte leakage occur for 1 Ah flexible pouch cell with 100%SOC. The mechanism for high safety of pouch cell has also been revealed.First the amount of combustible pyrolysis products from thermal degradationof GPE is reduced through forming P and F containing char. Second,the combustion of GPE is extinguished through OH free radical quenchingeffect of flame retardant molecular. This work provides a guideline fordesigning high-safety LIBs.

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