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Anion-immobilized solid composite electrolytes based on metal-organic frameworks and superacid ZrO_(2) fillers for high-performance all solid-state lithium metal batteries

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International Journal of Minerals,Metallurgy and Materials 2021年第10期28卷 1636-1646页

作者： Tao Wei Zao-hong Zhang Qi Zhang Jia-hao Lu Qi-ming Xiong Feng-yue Wang Xin-ping Zhou Wen-jia Zhao Xiang-yun Qiu School of Energy and power Jiangsu University of Science and TechnologyZhenjiang 212003China Institute of Mechanics and Energy National Research Ogarev Mordovia State UniversitySaransk 430000Russia Jiangsu University Jingjiang College Zhenjiang 212003China Department of Chemistry College of ScienceNanjing Agricultural UniversityNanjing 210095China power&Energy Storage System Research Center College of Mechanical and Electrical EngineeringQingdao UniversityQingdao 266071China

Anion-immobilized solid composite electrolytes(SCEs)are important to restrain the propagation of lithium dendrites for all solid-state lithium metal batteries(ASSLMBs).Herein,a novel SCEs based on metal-organic frameworks(MOFs,UiO-66-NH_(2))and superacid ZrO_(2)(S-ZrO_(2))fillers are proposed,and the samples were characterized by X-ray diffraction(XRD),scanning electron microscope(SEM),energy dispersive X-ray spectroscopy(EDS),thermo-gravimetric analyzer(TGA)and some other electrochemical ***-NH_(2) groups of UiO-66-NH_(2) combines with F atoms of poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP)chains by hydrogen bonds,leading to a high electrochemical stability window of 5 *** to the incorporation of UiO-66-NH_(2) and S-ZrO_(2) in PVDF-HFP polymer,the open metal sites of MOFs and acid surfaces of S-ZrO_(2) can immobilize anions by strong Lewis acid-base interaction,which enhances the effect of immobilization anions,achieving a high Li-ion transference number(t_(+))of 0.72,and acquiring a high ionic conductivity of 1.05×10^(-4) S·cm^(-1) at 60℃.The symmetrical Li/Li cells with the anion-immobilized SCEs may steadily operate for over 600 h at 0.05 mA·cm^(-2) without the shortcircuit ***,the solid composite Li/LiFePO_(4)(LFP)cell with the anion-immobilized SCEs shows a superior discharge specific capacity of 158 mAh·g^(-1) at 0.2 *** results illustrate that the anion-immobilized SCEs are one of the most promising choices to optimize the performances of ASSLMBs.

关键词： solid composite electrolytes poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP) all solid-state lithium metal batteries metal-organic frameworks anion-immobilized

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Practical development and challenges of garnet-structured Li_(7)La_(3)Zr_(2)O_(12) electrolytes for all-solid-state lithium-ion batteries:A review

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International Journal of Minerals,Metallurgy and Materials 2021年第10期28卷 1565-1583页

作者： Zao-hong Zhang Tao Wei Jia-hao Lu Qi-ming Xiong Yue-han Ji Zong-yuan Zhu Liu-ting Zhang School of Energy and power Jiangsu University of Science and TechnologyZhenjiang 212003China Institute of Mechanics and Energy National Research Ogarev Mordovia State UniversitySaransk 430000Russia

All-solid-state Li-ion batteries(ASSLIBs)have been widely studied to achieve Li-ion batteries(LIBs)with high safety and energy *** reviews and experimental papers have focused on methods that improve the ionic conductivity,stabilize the electrochemical performance,and enhance the electrolyte/electrode interfacial compatibility of several solid-state electrolytes(SSEs),including oxides,sulfides,composite and gel electrolytes,and so ***-structured Li_(7)La_(3)Zr_(2)O_(12)(LLZO)is highly regarded an SSE with excellent application ***,this type of electrolyte also possesses a number of disadvantages,such as low ionic conductivity,unstable cubic phase,and poor interfacial compatibility with anodes/*** benefits of LLZO have urged many researchers to explore effective solutions to overcome its inherent ***,we review recent developments on garnet-structured LLZO and provide comprehensive insights to guide the development of garnet-structured LLZO-type *** not only systematically and comprehensively discuss the preparation,element doping,structure,stability,and interfacial improvement of LLZOs but also provide future perspectives for these *** review expands the current understanding on advanced solid garnet electrolytes and provides meaningful guidance for the commercialization of ASSLIBs.

关键词： all solid-state lithium-ion batteries garnet-structured LLZO electrolytes interfacial compatibility polymer-ceramic composite electrolytes

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