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The critical role of inorganic nanofillers in solid polymer composite electrolyte for Li+transportation

Carbon Energy 2021年第3期3卷 482-508页

作者： Zhichuan Shen Yifeng Cheng Shuhui Sun Xi Ke Liying Liu Zhicong Shi School of Materials and Energy Guangdong University of TechnologyGuangzhouChina Guangdong Engineering Technology Research Center for New Energy Materials and Devices GuangzhouChina Energie Materiaux et Telecommunications Center Inst itut National de la Recherche Scientifique(INRS)QuebecCanada

Compared with commercial lithium batteries with liquid electrolytes,all-solidstate lithium batteries(ASSLBs)possess the advantages of higher safety,better electrochemical stability,higher energy density,and longer cycle life;therefore,ASSLBs have been identified as promising candidates for next-generation safe and stable high-energy-storage *** design and fabrication of solid-state electrolytes(SSEs)are vital for the future commercialization of *** various SSEs,solid polymer composite electrolytes(SPCEs)consisting of inorganic nanofillers and polymer matrix have shown great application prospects in the practice of *** incorporation of inorganic nanofillers into the polymer matrix has been considered as a crucial method to achieve high ionic conductivity for *** this review,the mechanisms of Li+transport variation caused by incorporating inorganic nanofillers into the polymer matrix are discussed in *** the basis of the recent progress,the respective contributions of polymer chains,passive ceramic nanofillers,and active ceramic nanofillers in affecting the Li+transport process of SPCE are reviewed *** inherent relationship between the morphological characteristics of inorganic nanofillers and the ionic conductivity of the resultant SPCE is ***,the challenges and future perspectives for developing high-performance SPCE are put *** review aims to provide possible strategies for the further improvement of ionic conductivity in inorganic nanoscale filler-reinforced SPCE and highlight their inspiration for future research directions.

关键词： all-solid-state lithium batteries inorganic nanofillers Li+transportation solid polymer composite electrolyte

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Effect of LiTFSI and LiFSI on Cycling Performance of Lithium Metal Batteries Using Thermoplastic Polyurethane/Halloysite Nanotubes solid electrolyte

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Acta Metallurgica Sinica(English Letters) 2021年第3期34卷 359-372页

作者： Zhichuan Shen Jiawei Zhong Wenhao Xle Jinbiao Chen Xi Ke Jianmin Ma Zhicong Shi School of Materials and Energy Guangdong University of TechnologyGuangzhou 510006China Guangdong Engineering Technology Research Center for New Energy Materials and Devices Guangzhou 510006China School of Physics and Electronics Hunan UniversityChangsha 410082China

All-solid-state lithium batteries(ASSLB) are promising candidates for next-generation energy storage ***,the large-scale commercial application of high energy density AS S LB with the polymer electrolyte still faces *** this study,a thin solid polymer composite electrolyte(SPCE) is prepared through a facile and cost-effective strategy with an infiltration of thermoplastic polyurethane(TPU),lithium salt(LiTFSI or LiFSI),and halloysite nanotubes(HNTs) in a porous framework of polyethylene separator(PE)(TPU-HNTs-LiTFSI-PE or TPU-HNTs-LiFSI-PE).The composition,electrochemical performance,and especially the effect of anions(TFSI-and FSI-) on cycling performance are *** results reveal that the flexible TPU-HNTs-LiTFSI-PE and TPU-HNTs-LiFSI-PE with a thickness of 34 μm exhibit wide electrochemical windows of 4.9 and 5.1 V(***+/Li) at 60℃,*** in FSI-tends to form more LiF and sulfur compounds at the interface between TPU-HNTs-LiFSI-PE and Li metal anode,thus enhancing the interfacial *** a result,cell composed of TPU-HNTs-LiFSI-PE exhibits a smaller increase in interfacial resistance of solid electrolyte interphase(SEI) with a distinct decrease in charge-transfer resistance during ***|Li symmetric cell with TPU-HNTs-LiFSI-PE could keep its stable overpotential profile for nearly 1300 h with a low hysteresis of approximately39 mV at a current density of 0.1 mA cm-2,while a sudden voltage rise with internal cell impedance-surge signals was observed within 600 h for cell composed of *** initial capacities of NCMITPU-HNTs-LiTFSIPEILi and NCMITPU-HNTs-LiFSI-PEILi cells were 149 and 114 mAh g-1,with capacity retention rates of 83.52% and89.99% after 300 cycles at 0.5 C,*** study provides a valuable guideline for designing flexible SPCE,which shows great application prospect in the practice of ASSLB.

关键词： solid polymer composite electrolyte Lithium metal anode Thermoplastic polyurethane Halloysite nanotubes Cycling performance

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