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La2Zr2O7 and MgO co-doped composite li-garnet solid electrolyte

Journal of Energy Chemistry 2020年第1期29卷 132-136,I0005页

作者： Jiu lin linbin Wu Zhen Huang Xiaoxiong Xu Jiheng liu Zhejiang Funlithium New Energy Technology Co. Ltd.

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 *** li anod... 详细信息

关键词： li-garnet li7La3Zr2O12 Composite electrolyte High conductivity La2Zr2O7 MgO

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Searching for low-cost li_(x)MO_(y)compounds for compensating li-loss in sintering of li-garnet solid electrolyte

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Journal of Materiomics 2019年第2期5卷 221-228页

作者： Xiao Huang Zhen Song Tongping Xiu Michael E.Badding Zhaoyin Wen CAS Key Laboratory of Materials for Energy Conversion Shanghai Institute of CeramicsChinese Academy of ScienceShanghai200050China Corning Research Center China 200 Jinsu RoadShanghai201206China Corning Incorporated CorningNY14831USA University of Chinese Academy of Sciences 19 A Yuquan RdShijingshan DistrictBeijing100049China

Cubic li-garnet li_(7)La_(3)Zr_(2)O_(12)(c-LLZO)is one of the promising solid-state electrolyte candidates for the next generation high safety solid-state ***,preparing the electrolyte has many ***-loss during high temperature sintering is one of *** powder with the same component of green garnet pellets is often used to co-fire with the pellets to compensate the *** to the high weight ratio of rare earth element La and non-recyclability of mother powder,it is worthy to explore low-cost mother powders to replace *** this paper,low cost compounds such as li_(5)AlO_(4),li_(2)TiO_(3),li_(2)SiO_(3),li4SiO_(4)and(li_(2)O)x-(ZrO_(2))_(1-x)(x=0.6-0.8)are investigated for substitution of the mother powder for compensating li-loss during the sintering of *** li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)(LLZTO)samples have been prepared by sintering with(li_(2)O)0.733(ZrO_(2))0.267 powder at 1150℃for 5 h with the relative density of 95%and conductivity of 5.7×10^(-4)S cm^(-1)at 25℃,which show same performance with LLZTO ceramics sintered with LLZO mother powder.

关键词： li-garnet c-LLZO Solid electrolyte li-loss Low-cost Sintering

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Green recycling of short-circuited garnet-type electrolyte for high-performance solid-state lithium batteries

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Journal of Energy Chemistry 2023年第5期80卷 492-500,I0012页

作者： Yongxian Huang Zhiwei Qin Cheng Shan Yuming Xie Xiangchen Meng Delai Qian Gang He Dongxin Mao Long Wan State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001HeilongjiangChina Zhengzhou Research Institute Harbin Institute of TechnologyZhengzhou 450046HenanChina School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina

Solid-state lithium batteries(SSLBs)solve safety issues and are potentially energy-dense alternatives to next-generation energy storage *** green recycling routes are responsible for the widespread use of SSLBs due to minimizing environmental contamination,reducing production costs,and providing a sustainable solution for resources,e.g.,saving rare earth elements(La,Ta,etc.).Herein,a solid-state recycling strategy is proposed to achieve green recycling of the crucial component solidstate electrolytes(SSEs)in spent *** short-circuited garnet li_(6.5)La_(3)Zr_(1.5)Ta_(0.5)O_(12)(LLZTO)is broken into fine particles and mixed with fresh particles to improve sintering activity and achieve high packing *** continuous li absorption process promotes sufficient grain fusion and guarantees the transformation from tetragonal phase to pure cubic phase for high-performance recycled *** li-ion conductivity reaches 5.80×10^(-4)S cm-1with a relative density of 95.9%.Symmetric li cell with asrecycled LLZTO shows long-term cycling stability for 700 h at 0.3 mA cm^(-2)without any voltage *** cell exhibits an excellent cycling performance with a discharge capacity of 141.5 mA h g^(-1)and a capacity retention of 92.1%after 400 cycles(0.2C).This work develops an environmentally friendly and economically controllable strategy to recycle SSE from spent SSLBs,guiding future directions of SSLBs large-scale industrial application and green recycling study.

关键词： Solid-state electrolytes li-garnet Green recycling Solid-state lithium batteries Cycling stability

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Preparation of dense Ta-LLZO/MgO composite li-ion solid electrolyte:Sintering, microstructure, performance and the role of MgO

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Journal of Energy Chemistry 2019年第12期28卷 8-16页

作者： Xiao Huang Yang Lu Zhen Song Tongping Xiu Michael EBadding Zhaoyin Wen CAS Key Laboratory of Materials for Energy Conversion Shanghai Institute of CeramicsChinese Academy of ScienceShanghai 200050China Corning Incorporated ComingNY 14831USA Corning Research Center China 200 Jinsu RoadShanghai 201206China University of Chinese Academy of Sciences 19A Yuquan RdShijingshan DistrictBeijing 100049China

Cubic phase li7La3Zr2O12(LLZO),a member of the li–garnet family,is a promising solid electrolyte and has been widely studied in recent ***,LLZO samples prepared via conventional ambient air sintering reported in the published literature often contain large grains with lower than desired(lity Ta-doped LLZO–MgO composite *** sintering at 1150℃for 5 h,the ceramics can reach relative density of 98.2%,conductivity of 5.17×10^-4 S cm^-1 at 25℃and fracture strength of 150 *** sintered samples have uniform fine-grained microstructure and high critical current densities of 0.75–0.95 mA cm-2 at room temperature in li–li symmetry cell with Au *** addition,systematic sintering experiments and characterizations are conducted to explore the function of MgO in inhibiting the Ta-LLZO grain growth and its existing form inside the composite ceramics.

关键词： li-garnet Solid electrolyte Mechanism Critical current density Sintering

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