首页|Ferroelectric Ceramic Materials Enable High-Performance Organic-Inorganic Composite Electrolytes in Solid-State Lithium Metal Batteries
Ferroelectric Ceramic Materials Enable High-Performance Organic-Inorganic Composite Electrolytes in Solid-State Lithium Metal Batteries
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Compared to commercial lithium-ion batteries,all-solid-state batteries can greatly increase the energy density,safety,and cycle life of batteries.The development of solid-state electrolyte with high lithium-ion conductivity and wide electrochemical window is the key for all-solid-state batteries.In this work,we report on the achievement of high ionic conductivity in the PAN/LiClO4/BaTiO3 composite solid electrolyte(CSE)prepared by solution casting method.Our experimental results show that the PAN-based composite polymer electrolyte with 5wt％BaTiO3 possesses a high room-temperature lithium-ion conductivity(9.85 × 10-4 S·cm-1),high lithium-ion trans-fer number(0.63),wide electrochemical window(4.9 V vs Li+/Li).The Li|Li symmetric battery assembled with 5wt％BaTiO3 can be stably circulated for 800h at 0.1mA·cm-2,and the LiFePO4|CSE|Li battery maintains a capacity retention of 86.2％after 50 cycles at a rate of 0.3 C.The influence of BaTiO3 ceramic powder on the properties of PAN-based polymer electrolytes is analyzed.Our results provide a new avenue for future research in the all-solid-state lithium battery technology.
马静媛、黄昱力、周晗洁、王媛媛、李建刚、禹习谦、李泓、李妍
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College of New Materials and Chemical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102627,China
Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China
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