【摘 要】
：
Lithium (Li) metal with an ultrahigh specific theoretical capacity and the lowest reduction potential is strongly considered as a promising anode for high-energy-density batteries.However,uncontrolled lithium dendrites and infinite volume change during re
【机 构】
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Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical
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Lithium (Li) metal with an ultrahigh specific theoretical capacity and the lowest reduction potential is strongly considered as a promising anode for high-energy-density batteries.However,uncontrolled lithium dendrites and infinite volume change during repeated plating/stripping cycles hinder its practical applications immensely.Herein,a house-like Li anode (housed Li) was designed to circumvent the above issues.The house matrix was composed of carbon fiber matrix and affords a stable structure to relieve the volume change.An artificial solid electrolyte layer was formed on composite Li metal,just like the roof of a house,which facilitates uniform Li ions diffusion and serves as a physical barrier against electrolyte corrosion.With the combination of solid electrolyte layer and matrix in the composite Li metal anode,both dendrite growth and volume expansion are remarkably inhibited.The housed Li | LiFePO4 batteries exhibited over 95％ capacity retention after 500 cycles at 1.0 C in coin cell and 85％ capacity retention after 80 cycles at 0.5 C in pouch cell.The rationally combination of solid electrolyte layer protection and housed framework in one Li metal anode sheds fresh insights on the design principle of a safe and long-lifespan Li metal anode for Li metal batteries.
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