Boosting lithium batteries under harsh operating conditions by a resilient ionogel with liquid-like

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New chemistries are being developed to increase the capacity and power of rechargeable batteries.However,the risk of safety issues increases when high-energy batteries using highly active materials encounter harsh operating conditions.Here we report on the synthesis of a unique ionogel electrolyte for abuse-tolerant lithium batteries.A hierarchically architected silica/polymer scaffold is designed and fabri-cated through a facile soft chemistry route,which is competent to confine ionic liquids with superior uptake ability(92.4 wt%).The monolithic ionogel exhibits high conductivity and thermal/mechanical stability,fea-turing high-temperature elastic modulus and dendrite-free lithium cycling.The Li/LiFePO4 pouch cells achieve outstanding cyclability at different temperatures up to 150℃,and can sustain cutting,crumpling,and even coupled thermal-mechanical abuses.Moreover,the solid-state lithium batteries with LiNi0.60Co0.20Mn0.20O2,LiNi0.80Co0.15Al0.05O2,and Li1.2Mn0.54Ni0.13Co0.13O2 cathodes demonstrate excellent cycle performances at 60℃.These results indicate that the resilient and high-conductivity ionogel elec-trolyte is promising to realize high-performance lithium batteries with high energy density and safety.
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