首页|An in-situ polymerized interphase engineering for high-voltage all-solid-state lithium-metal batteries
An in-situ polymerized interphase engineering for high-voltage all-solid-state lithium-metal batteries
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All-solid-state lithium batteries(ASSLBs)have attracted great interest due to their promising energy density and strong safety.However,the interface issues,including large interfacial resistance between electrode and electrolyte and low electrochemical stability of solid-state electrolytes against high-voltage cathodes,have restricted the development of high-voltage ASSLBs.Herein,we report an ASSLB with stable cycling by adopting a conformal polymer interlayer in-situ formed at the Li6.4La3Zr1.4Ta0.6O12(LLZTO)-cathode interfaces.The polymer can perfectly fill the voids and create a stable interface contact between LLZTO and cathodes.In addition,the electric field across the polymer interlayer is reduced compared with pure solid polymer electrolyte(SPE),which facilitates the electrochemical stability with high-voltage cathode.The all-solid-state Li|LLZTO-SPE|LiFe0.4Mn0.6PO4(LMFP)cells achieve a low interface impedance,high specific capacity,and excellent cycling performance.This work presents an effective and practical strategy to rationally design the electrode-electrolyte interface for the application of high-voltage ASSLBs.
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