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Molecular coordination-doping engineering enables adjustable ion transport channel based on MOFs-derived UIOLiTF-LLZTO ionic conductor

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Journal of Materials Science & Technology 2023年第32期163卷 113-120页

作者： Shuyu Yao Chenyong Li Bing Jia Haoran Xu Shihua Dong Jian Tian School of Materials Science and Engineering College of Energy Storage TechnologyShandong University of Science and TechnologyQingdao266590China Qingdao Haiwan Technology Industry Research Institute Co. Ltd.Qingdao Haiwan Group Co.Ltd.Qingdao266061China Rongcheng Hui De Environmental Protection Technology Co. Ltd.Weihai264300China

The inferior ionic conductivity of composite polymer electrolytes(CPEs)caused by grain boundary impedance is one of the critical *** ion transport channels at the molecular level can improve ionic conductivity and lithium-ion transference ***,UIO-66-NSO_(2)CF_(3)LiLi_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)(UIOLiTF-LLZTO)ionic conductor derived from metal-organic frameworks(MOFs)was designed by a covalent grafted strategy of trifluoromethylsulfonyl(TF)group on UIOLiTF and a doping process of LLZTO,showing two new lithium-ion transfer channels driven by molecular coordinationdoping *** first channel along UIOLiTF-UIOLiTF was constructed due to the existence of the TF group on *** second channel along UIOLiTF-LLZTO was constructed due to the direct nanometer contact interface between the opened channel of UIOLiTF and *** TF group acts as“claws”to capture and transfer lithium-ion along the different channels,facilitating improving ionic conductivity and reducing grain boundary *** from the molecular coordination-doping engineering,UIOLiTF-LLZTO exhibits high ionic conductivity of 9.86×10^(-4)S cm^(-1),a large lithium-ion transference number of 0.79,and a wide electrochemical window of 5.35 ***,all-solid-state Li|UIOLiTF-LLZTO|LiFePO4 batteries show a high specific capacity of 164.5 mAh g^(-1)and 155.6 mAh g^(-1)at 0.2 C and 0.5 C,***,UIOLiTF-LLZTO demonstrates the way towards the development of MOFs-based CPEs for all-solid-state lithium batteries with high performance.

关键词： Metal-organic frameworks LLZTO ionic conductor Lithium-ion transport channel Solid-state battery

Boosting the performance of LiNi_(0.90)Co_(0.06)Mn_(0.04)O_(2) electrode by uniform Li_(3)PO_(4) coating via atomic layer deposition

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Chinese Chemical Letters 2024年第5期35卷 499-503页

作者： Mingjiao Lu Zhixing Wang Gui Luo Huajun Guo Xinhai Li Guochun Yan Qihou Li Xianglin Li Ding Wang Jiexi Wang School of Metallurgy and Environment Central South UniversityChangsha 410083China BASF ShanShan Battery Materials Co. Ltd.Changsha 410006China Engineering Research Center of the Ministry of Education for Advanced Battery Materials Central South UniversityChangsha 410083China Hunan Provincial Key Laboratory of Nonferrous Value-Added Metallurgy Central South UniversityChangsha 410083China School of Physics and Chemistry Hunan First Normal UniversityChangsha 410205China National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology Key Laboratory of Advanced Battery Materials of Yunnan ProvinceFaculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093China

Ultra-high nickel material is considered to be a promising cathode ***,with the increase of nickel content,the interfacial side reactions between the cathode and electrolyte become increasingly ***,an atomically controllable ionic conductor Li_(3)PO_(4)(LPO)coating is deposited on the LiNi_(0.90)Co_(0.06)Mn_(0.04)O_(2)(NCM9064)based electrode by the atomic layer deposition *** results shows that the LPO coating is uniformly and densely covered on the surface of secondary particles of NCM9064,helping to prevent the direct contact between the electrolyte and cathode during the chargingdischarging *** addition,the coating layer is electrochemically *** a result,the interfacial side reactions during the long cycle are effectively suppressed,and the solid electrolyte interphase layer at the interface is *** electrode with 20 layers of LPO deposition(ALD-LPO-20)exhibits an excellent capacity retention of 81%after 200 cycles in 2.8-4.3 V at 25℃,which is 18%higher than the unmodified material(ALD-LPO-0).Besides,the moderate LPO coating improves the rate capability and high temperature cycling performance of *** study provides a method for the modification of ultra-high nickel cathode materials and corresponding electrodes.

关键词： Ultra-high nickel material LiNi_(0.90)Co_(0.06)Mn_(0.04)O_(2) Atomic layer deposition Li_(3)PO_(4) ionic conductor

Lithium-site substituted argyrodite-type Li_(6)PS_(5)I solid electrolytes with enhanced ionic conduction for all-solid-state batteries

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Science China(Technological Sciences) 2023年第7期66卷 2059-2068页

作者： GAO Ling XIE YuLin TONG Yan XU Miao YOU JiaLe WEI HuiPing YU XiangXiang XU SiQi ZHANG Yi CHE Yong TANG Ya SUZUKI Kota KANNO Ryoji ZHAO GuoWei College of Chemistry and Chemical Engineering Huanggang Normal UniversityHuanggang 438000China State Key Laboratory of Space Power-Sources Technology Shanghai Institute of Space Power-SourcesShanghai 200245China Shanghai Enpower Technology Co. Ltd.Shanghai 201802China Beijing Enpower Technology Co. Ltd.Beijing 102628China Department of Chemistry School of ScienceShanghai UniversityShanghai 200444China Research Center for All-Solid-State Battery Institute of Innovation ResearchTokyo Institute of TechnologyYokohama 226-8502Japan

Argyrodites,Li_(6)PS_(5)X(X=Cl,Br,I),have piqued the interest of researchers by offering promising lithium ionic conductivity for their application in all-solid-state batteries(ASSBs).However,other than Li_(6)PS_(5)Cl(651Cl)and Li_(6)PS_(5)Br(651Br),Li_(6)PS_(5)I(651I)shows poor ionic conductivity(10^(-7)S cm^(-1)at 298 K).Herein,we present Al-doped 651I with I^(-)/S^(2-)site disordering to lower activation energy(Ea)and improve ionic *** formed argyrodite-type solid solutions with a composition of(Li_(6–3x)Al_(x))PS_(5)I in 0≤x≤0.10,and structural analysis revealed that Al^(3+)is located at Li ***,the Al-doped samples contained anion I^(-)/S^(2-)site disorders in the crystal structures and smaller lattice parameters than the non-doped *** spectroscopy measurements indicated that Al-doping reduced the ionic diffusion barrier,Ea,and increased the ionic conductivity to 10^(-5)S cm^(-1);the(Li5.7Al0.1)PS5I had the highest ionic conductivity in the studied system,at 2.6×10^(-5)S cm^(-1).In a lab-scale ASSB,with(Li_(5.7)Al_(0.1))PS_(5)I functioned as a solid electrolyte,demonstrating the characteristics of a pure ionic conductor with negligible electronic *** evaluated ionic conduction is due to decreased Li+content and I^(-)/S^(2-)disorder ***-site cation doping enables an in-depth understanding of the structure and provides an additional approach to designing betterperforming SEs in the argyrodite system.

关键词： argyrodite Li6PS5I solid electrolytes ionic conductor ionic conductivity

Development of proton-conducting membrane based on incorporating a proton conductor 1,2,4-triazolium methanesulfonate into the Nafion membrane

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Journal of Energy Chemistry 2015年第2期24卷 199-206页

作者： Jinkai Hao Xiaojin Li Shuchun Yu Yongyi Jiang Jiangshui Luo Zhigang Shao Baolian Yi Fuel Cell System and Engineering Laboratory Dalian Institute of Chemical Physics Chinese Academy of Sciences University of Chinese Academy of Sciences Department of Materials Engineering Centre for Surface Chemistry and Catalysis

In this paper, 1,2,4-triazolium methanesulfonate （C_2H_4N_3^＋-CH_3SO_3^-, [Tri][MS]）, an ionic conductor, was successfully synthesized. It exhibited high ionic conductivity of 18.60 mS·cm^-1 at 140 ℃ and reached up to 36.51 mS·cm^-1 at 190 ℃. [Tri][MS] was first applied to modify Nation membrane to fabricate [Tri][MS]/Nafion membrane by impregnation method at 150 ℃. The prepared composite membrane showed high thermal stability with decomposed temperature above 200 ℃ in air atmosphere. In addition, the membrane indicated good ionic conductivity with 3.67 mS·cm^-1 at 140 ℃ and reached up to 13.23 mS·cm^-1 at 180 ℃. The structure of the [Tri][MS] and the composite membrane were characterized by FTIR and the compatibility of [Tri][MS] and Pt/C catalyst was studied by a cyclic voltammetry （CV） method. Besides, the [Tri][MS]/Nafion membrane （thickness of 65 μm） was evaluated with single fuel cell at high temperature and without humidification. The highest power density of [Tri][MS]/Nafion membrane was 3.20 mW·cm^-2 at 140 ℃ and 4.90 mW·cm^-2 at 150 ℃, which was much higher than that of Nation membrane.

关键词： high temperature PEMFC membranes triazole Nafion ionic conductor

Novel Nano-composites SDC–LiNaSO_4 as Functional Layer for ITSOFC

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Nano-Micro Letters 2015年第3期7卷 268-275页

作者： Weiming Lv Ze Tong Yi-Mei Yin Jiewei Yin Zi-Feng Ma Shanghai Electrochemical Energy Devices Research Center School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai Research and Development Center for Polymer Materials

As an ionic conductive functional layer of intermediate temperature solid oxide fuel cells(ITSOFC), samarium-doped ceria(SDC)–Li Na SO4nano-composites were synthesized by a sol–gel method and their properties were investigated. It was found that the content of Li Na SO4 strongly affected the crystal phase, defect concentration, and conductivity of the composites. When the content of Li Na SO4 was 20 wt%, the highest conductivity of the composite was found to be, respectively, 0.22, 0.26, and 0.35 S cm-1at temperatures of 550, 600, and 700 °C, which are much higher than those of SDC. The peak power density of the single cell using this composite as an interlayer was improved to, respectively, 0.23, 0.39, and 0.88 W cm-2at 500, 600, and 700 °C comparing with that of the SDC-based cell. Further, the SDC–Li Na SO4(20 wt%)-based cell also displayed better thermal stability according to the performance measurements at 560 °C for 50 h. These results reveal that SDC–Li Na SO4 composite may be a potential good candidate as interlayer for ITSOFC due to its high ionic conductivity and thermal stability.

关键词： Nano-composite SDC–Li Na SO4 ionic conductor Solid oxide fuel cell

Synthesis of New Solid Solutions on Neodymium-stabilized La_2Mo_2O_9

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Chinese Chemical Letters 2003年第2期14卷 197-200页

作者： Qi Bing BO Jing FENG 等 KeyLaboratoryofRsreEarthChemistryandPhysics ChangchunInstituteofAppliedChemistryChineseAcademyofSciencesChangchun130022 KeyLaboratoryofRsreEarthChemistryandPhysics ChangchunI

A new ionic conductor La2-xNdxMo2O9 (x=0.0-2.0) has been synthesized by wet- chemistry method. The precursors and the resultant oxide powders were characterized by DTA/TG, DSC, XRD and XPS techniques. Effect of substituting Nd for La reveals that the phase transition which occurs in La2Mo2O9 around 565℃ disappears when x>0.2. And the maximum amount of Nd stabilized the high temperature phase of βLa2Mo2O9 from cubic to tetragonal is about x =1.6. The measurements of impedance spectroscopy indicate that the ionic conductivity becomes considerably higher in comparison to that of La2Mo2O9.

关键词： La2-xNdxMo2O9 thermal analysis ionic conductor molybdate.