Various solid electrolytes,such as sulfides(10^-3-10^-2 S cm^-1)and oxides(10^-4–10^-3 S cm^-1)are explored and developed to solve the safety problems in commercial Li-ion batteries using liquid flammable electrolyte...Various solid electrolytes,such as sulfides(10^-3-10^-2 S cm^-1)and oxides(10^-4–10^-3 S cm^-1)are explored and developed to solve the safety problems in commercial Li-ion batteries using liquid flammable electrolytes.Metallic Li anode is required for pursuing high power density(>300 Wh kg^-1)for solid-state batteries[1,2].展开更多
Garnet-like Li6.8La3Zr1.8Bi0.2O12 (LLZBO) + x mol.% Al2O3 (x = 0, 1.25, 2.50) lithium ionic electrolytes were prepared by conventional solid state reaction method under two different sintering temperatures of 100...Garnet-like Li6.8La3Zr1.8Bi0.2O12 (LLZBO) + x mol.% Al2O3 (x = 0, 1.25, 2.50) lithium ionic electrolytes were prepared by conventional solid state reaction method under two different sintering temperatures of 1000℃ and 1100℃. XPS, induced coupled plasma optical emission spectrometer (ICP-OES), XRD and AC impedance spectroscopy were applied to investigate the bismuth valance, lithium concentration, phase structure and lithium ionic conductivity, respectively. Electrical measurement demonstrated that ionic conductivity of AI-added LLZBO compounds could be obviously improved when the sample sintering temperature increased from 1000℃ to 1100℃. The highest ionic conductivity 6.3×10-S/cm was obtained in the LLZBO-1.25%AI sample sintered at 1100℃, in consistent with the lowest activation energy 0.45eV for the lithium ion migration. The mechanism related with good ionic conductivity in the AI-added LLZBO sample was attributed to the lattice distortion induced by the partial AI substitution at Zr sites, which is helpful to improve the migration ability of Li ions in lattice.展开更多
Li-ion solid electrolytes,which are compatible with metallic lithium anodes,are the key component of all solid-state batteries.Recently,the garnet Li7La3Zr2O12 solid electrolyte has experienced booming development and...Li-ion solid electrolytes,which are compatible with metallic lithium anodes,are the key component of all solid-state batteries.Recently,the garnet Li7La3Zr2O12 solid electrolyte has experienced booming development and shown great potential for its excellent overall performance.However,further understanding of its stability with lithium is required for a longer battery lifetime.In this review,latest research work on the interace between garnet-type solid electrolytes and lithium is presented,including both mechanisms governing interface stability and interface engineering methods.The development prospects and potential directions for following research are also discussed in the last section.展开更多
基金financially supported by Ganfeng Lithium Co., Ltd.
文摘Various solid electrolytes,such as sulfides(10^-3-10^-2 S cm^-1)and oxides(10^-4–10^-3 S cm^-1)are explored and developed to solve the safety problems in commercial Li-ion batteries using liquid flammable electrolytes.Metallic Li anode is required for pursuing high power density(>300 Wh kg^-1)for solid-state batteries[1,2].
基金Acknowledgements This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 11374299, 11405203 and 51401203).
文摘Garnet-like Li6.8La3Zr1.8Bi0.2O12 (LLZBO) + x mol.% Al2O3 (x = 0, 1.25, 2.50) lithium ionic electrolytes were prepared by conventional solid state reaction method under two different sintering temperatures of 1000℃ and 1100℃. XPS, induced coupled plasma optical emission spectrometer (ICP-OES), XRD and AC impedance spectroscopy were applied to investigate the bismuth valance, lithium concentration, phase structure and lithium ionic conductivity, respectively. Electrical measurement demonstrated that ionic conductivity of AI-added LLZBO compounds could be obviously improved when the sample sintering temperature increased from 1000℃ to 1100℃. The highest ionic conductivity 6.3×10-S/cm was obtained in the LLZBO-1.25%AI sample sintered at 1100℃, in consistent with the lowest activation energy 0.45eV for the lithium ion migration. The mechanism related with good ionic conductivity in the AI-added LLZBO sample was attributed to the lattice distortion induced by the partial AI substitution at Zr sites, which is helpful to improve the migration ability of Li ions in lattice.
基金the National Natural Science Foundation of China(Nos.51788104,51661135025)。
文摘Li-ion solid electrolytes,which are compatible with metallic lithium anodes,are the key component of all solid-state batteries.Recently,the garnet Li7La3Zr2O12 solid electrolyte has experienced booming development and shown great potential for its excellent overall performance.However,further understanding of its stability with lithium is required for a longer battery lifetime.In this review,latest research work on the interace between garnet-type solid electrolytes and lithium is presented,including both mechanisms governing interface stability and interface engineering methods.The development prospects and potential directions for following research are also discussed in the last section.