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A highly ionic conductive succinonitrile-based composite solid electrolyte for lithium metal batteries

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Nano Research 2022年第6期15卷 5153-5160页

作者： Genrui Qiu Yapeng Shi Bolong Huang CAS Center for Excellence in Nanoscience Beijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong 999077China

Solid-state Li metal batteries with solid electrolytes have built a potential way to solve the safety and low energy density problems of current commercial Li-ion batteries with liquid *** a key component of solid-state Li metal batteries,solid electrolytes require high ionic conductivities and good mechanical *** have designed a composite solid electrolyte(CSE)consisting of poly(vinylidene fluoride-hexafluoropropylene)(PVDF-HFP)-Li_(6.5)La_(3)Zr_(1.5)Ta_(0.5)O_(12)(LLZTO)-succinonitrile(SN)and Li bis(trifluoromethylsulphonyl)imide(LiTFSI).The PVDF-HFP-based porous matrix made by electrospinning ensures good mechanical properties of the electrolyte membrane,and the large proportion of SN filling material makes the electrolyte membrane have an ionic conductivity of 1.11 mS·cm^(–1)without the addition of liquid *** symmetric battery assembled with CSE can be cycled stably for more than 600 h,and the LiFePO4|CSE|Li full battery can also be cycled stably for more than 200 *** addition to Li metal batteries,Li-O_(2)and Li-CO_(2)batteries that use CSE as electrolytes also have good performances,reflecting the universality of *** does not only guarantee good mechanical properties but also obtain a high ionic *** design provides a new idea for the commercial application of polymer-based solid batteries.

关键词： Li metal batteries composite solid-state electrolyte succinonitrile ionic conductivity mechanical strength

Green Chemistry of Cellulose Acetate Membrane Plasticized by Citric Acid and succinonitrile for Lithium-Ion Battery Application

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Journal of Renewable Materials 2024年第11期12卷 1863-1878页

作者： Christin Rina Ratri Qolby Sabrina Adam Febriyanto Nugraha Sotya Astutiningsih Mochamad Chalid Green Polymer Technology Laboratory Department of Metallurgical and Materials EngineeringFaculty of EngineeringUniversitas IndonesiaDepokJawa Barat16424Indonesia Research Center for Advanced Materials National Research and Innovation AgencyKST BJ Habibie Gd.440-441Tangerang SelatanBanten15314Indonesia

Commercial lithium-ion batteries(LIBs)use polyolefins as *** has led to increased research on separators composed of renewable materials such as cellulose and its *** this study,the ionic conductivity of cellulose acetate(CA)polymer electrolyte membranes was enhanced via plasticization with citric acid and *** primary objective of this study was to evaluate the effectiveness of these plasticizers in improving cellulose-based separator membranes in *** membranes were fabricated using solution casting technique and then plasticized with various concentrations of *** structural,thermal,and electrochemical properties of the resulting membranes were characterized using Fourier Transform infrared(FTIR)spectroscopy,X-Ray Diffraction(XRD),Differential Scanning Calorimetry(DSC),Thermogravimetric Analysis(TGA),and Electrochemical Impedance Spectroscopy(EIS).The FTIR and XRD results confirmed the successful incorporation of citric acid and succinonitrile into the polymer matrix,while the TGA analysis demonstrated the enhanced thermal stability of the plasticized *** shift in the glass transition temperature was determined by DSC *** notably,the EIS results revealed a significant increase in ionic conductivity,achieving a maximum of 2.7×10^(-5) S/cm at room *** improvement was attributed to the effect of plasticizers,which facilitated the dissociation of lithium salts and increase the mobility of the lithium *** ionic conductivities of plasticized CA membranes are better than those of unmodified CA membranes and commercially available Celgard separator membranes:4.7×10^(-6) and 2.1×10^(-7) S/cm,*** findings suggest that citric acid and succinonitrile are effective plasticizers for cellulose acetate membranes,making them promising substitutes for commercial polyolefin separators in LIB applications.

关键词： Cellulose polymer electrolyte natural plasticizer citric acid succinonitrile

丁二腈增塑氟化聚碳酸酯基固态电解质用于4.5 V高压锂金属电池

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Science China Materials 2024年第5期67卷 1393-1402页

作者：孙锦旭王勇李瑀封伟 School of Materials Science and Engineering Tianjin UniversityTianjin300072China Institute of Advanced Technology and Equipment Beijing University of Chemical TechnologyBeijing100029China Key Laboratory of Advanced Ceramics and Machining Technology Ministry of Education Tianjin300072China

与液态电解质相比,聚合物电解质(SPEs)具有更高的安全性,在储能领域具有广阔的应用前景.但是其高压下易分解、室温离子电导率低、室温循环性能差等问题阻碍了SPEs的应用.本研究以丙烯酸三氟乙酯和碳酸乙烯亚乙酯为原料,丁二腈为增塑剂,... 详细信息

与液态电解质相比,聚合物电解质(SPEs)具有更高的安全性,在储能领域具有广阔的应用前景.但是其高压下易分解、室温离子电导率低、室温循环性能差等问题阻碍了SPEs的应用.本研究以丙烯酸三氟乙酯和碳酸乙烯亚乙酯为原料,丁二腈为增塑剂,原位聚合制备了氟化聚碳酸酯基固态电解质***-40在25℃条件下离子电导率高达1.33 mS cm^(-1),电化学窗口达到5.4 V.得益于富含氟化锂的SEI层的形成,Li|SNSPE-40|Li电池以0.1 mA cm^(-2)电流密度稳定循环了2000 h.在4.5 V截止电压和室温条件下,Li|SNSPE-40|LiNi_(0.9)Co_(0.05)-Mn0.05O_(2)电池实现了0.5 C(1 C=220 mA g^(-1))倍率300圈的稳定循环(57.4%容量保持率).Li|SNSPE-40|LiCoO_(2)电池实现了1 C(1 C=200 mA g^(-1))倍率250圈的长循环(54.9%容量保持率).这种新型固态电解质在高压固态锂金属电池中表现出巨大应用潜力.

关键词： solid polymer electrolyte fluorinated polycarbonate succinonitrile lithium metal batteries solid electrolyte interphase

Quasi-solid-state polymer plastic crystal electrolyte for subzero lithium-ion batteries

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Journal of Energy Chemistry 2020年第7期29卷 87-93,I0003页

作者： Yumei Zhou Fengrui Zhang Peixin He Yuhong Zhang Yiyang Sun Jingjing Xu Jianchen Hu Haiyang Zhang Xiaodong Wu i-Lab Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO)Chinese Academy of SciencesSuzhou 215123JiangsuChina Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Key Laboratory for the Synthesis and Application of Organic Functional MoleculesMinistry of EducationCollege of Chemistry and Chemical EngineeringHubei UniversityWuhan 430062HubeiChina National Engineering Laboratory for Modern Silk College of Textile and Clothing EngineeringResearch Center of Cooperative Innovation for Functional Organic/Polymer Material Micro/NanofabricationSoochow University199 Ren-Ai RoadSuzhou Industrial ParkSuzhou 215123JiangsuChina

succinonitrile(SN)-based polymer plastic crystal electrolytes(PPCEs)have attracted considerable attention as solid-state electrolytes owing to their high ionic conductivities similar to those of liquid electrolytes,excellent contacts with the electrodes,and good mechanic *** a crucial property of a solid-state electrolyte,the ionic conductivity of the PPCE directly depends on the interactions between the constituent parts including the polymer,lithium salt,and SN.A few studies have focused on the effects of polymer–lithium–salt and polymer–SN interactions on the PPCE ionic ***,the impact of the lithium–salt–SN combination on the PPCE ionic conductivity has not been *** particular,tuning of the lithium-salt–SN interaction to fabricate a subzero PPCE with a high low-temperature ionic conductivity has not been *** this study,we design and fabricate five PPCE membranes with different weight ratios of Li N(SO2 CF3)2(Li TFSI)and SN to investigate the effect of the Li TFSI–SN interaction on the PPCE ionic *** ionic conductivities of the five PPCEs are investigated in the temperature range of–20 to 60°C by electro-chemical impedance *** interaction is analyzed by Fourier-transform infrared spectroscopy,Raman spectroscopy,and differential scanning *** Li TFSI–SN interaction significantly influences the melting point of the PPCE,dissociation of the Li TFSI salt,and thus the PPCE ionic *** tuning the Li TFSI–SN interaction,a subzero workable PPCE membrane having an excellent low-temperature ionic conductivity(6×10-4 S cm–1 at 0°C)is *** electro-chemical performance of the optimal PPCE is evaluated by using a Li Co O2/PPCE/Li4 Ti5 O12 cell,which confirms the application feasibility of the proposed quasisolid-state electrolyte in subzero workable lithium-ion batteries.

关键词： succinonitrile Polymer plastic crystal electrolyte Ionic conductivity Lithium-salt–succinonitrile interaction Subzero lithium-ion battery

Tuning composite solid-state electrolyte interface to improve the electrochemical performance of lithium-oxygen battery

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Green Energy & Environment 2023年第4期8卷 1195-1204页

作者： Hao Ouyang Shan Min Jin Yi Xiaoyu Liu Fanghua Ning Jiaqian Qin Yong Jiang Bing Zhao Jiujun Zhang School of Environmental and Chemical Engineering Shanghai UniversityShanghai200444China Institute for Sustainable Energy/College of Sciences Shanghai UniversityShanghai200444China Center of Excellence in Responsive Wearable Materials Metallurgy and Materials Science Research InstituteChulalongkorn UniversityBangkok10330Thailand

Thin and flexible composite solid-state electrolyte(SSE) is considered to be a prospective candidate for lithium-oxygen(Li-O_(2)) batteries with the aim to address the problems of unsatisfied safety, terrible durability as well as inferior electrochemical performance. Herein, in order to improve the safety and durability, a succinonitrile(SN) modified composite SSE is proposed. In this SSE, SN is introduced for eliminating the boundary between ceramic particles, increasing the amorphous region of polymer and ensuring fast ionic transport. Subsequently, the symmetric battery based on the proposed SSE achieves a long cycle life of 3000 h. Moreover, the elaborate cathode interface through the SN participation effectively reduces the barriers to the combination between lithium ions and electrons, facilitating the corresponding electrochemical *** a result, the solid-state Li-O_(2)battery based on this SSE and tuned cathode interface achieves improved electrochemical performance including large specific capacity over 12,000 m Ah g^(-1), enhanced rate capacity as well as stable cycle life of 54 cycles at room temperature. This ingenious design provides a new orientation for the evolution of solid-state Li-O_(2)batteries.

关键词： Solid-state Li-O_(2)battery Composite electrolyte Cathode interface Room temperature succinonitrile

Ultra-homogeneous dense Ag nano layer enables long lifespan solid-state lithium metal batteries

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Journal of Energy Chemistry 2024年第9期96卷 110-119页

作者： Yaning Liu Tianqi Yang Ruyi Fang Chengwei Lu Ruojian Ma Ke Yue Zhen Xiao Xiaozheng Zhou Wenkui Zhang Xinping He Yongping Gan Jun Zhang Xinhui Xia Hui Huang Xinyong Tao Yang Xia College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014ZhejiangChina Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang Province Institute of Optoelectronic Materials and DevicesChina Jiliang UniversityHangzhou 310018ZhejiangChina

The unstable electrolyte/lithium(Li)anode interface has been one of the key challenges in realizing high energy density solid-state lithium metal batteries(LMBs)***,a dense and uniform silver(Ag)nano interlayer with a thickness of∼35 nm is designed accurately by magnetron sputtering technology to optimize the electrolyte/Li anode *** Ag nano layer reacts with Li metal anode to in-situ form Li-Ag alloy,thus enhancing the physical interfacial contact,and further improving the interfacial wettability and *** particular,the Li-Ag alloy is inclined to form AgLi phase proved by cryo-TEM and DFT,effectively preventing SN from continuously“attacking”the Li metal anode due to the lower adsorption of succinonitrile(SN)molecules on AgLi than that of pure Li metal,thereby significantly reinforcing the interfacial ***,the enhanced physical and chemical stability of electrolyte/Li anode interface promotes the homogeneous deposition of Li^(+)and inhibits the dendrite *** Li-symmetric cell maintains stable operation for up to 1700 h and the cycling stability of LiFePO_(4)|SPE|Li full cell is remarkably improved at room temperature(capacity retention rate of 91.9%for 200 cycles).This work opens an effective way for accurate and controllable interface design of long lifespan solid-state LMBs.

关键词： Silvernano layer Poly(ethylene oxide) Solid polymer electrolyte succinonitrile Lithium metal battery

Novel ionic liquid based electrolyte for double layer capacitors with enhanced high potential stability

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Science China Chemistry 2016年第5期59卷 547-550页

作者： Lan Zhang Kun Dong Shimou Chen Suojiang Zhang Beijing Key Laboratory of Ionic Liquids Clean Chemical Process State Key Laboratory of Multiphase Complex SystemsInstitute of Process and EngineeringChinese Academy of SciencesBeijing 100190China

Developing electrolyte with high electrochemical stability is the most effective way to improve the energy density of double layer capacitors(DLCs), and ionic liquid is a promising choice. Herein, a novel ionic liquid based high potential electrolyte with a stabilizer, succinonitrile, was proposed to improve the high potential stability of the DLC. The electrolyte with 7.5 wt% succinonitrile added has a high ionic conductivity of 41.1 m S cm^(-1) under ambient temperature, and the DLC adopting this electrolyte could be charged to 3.0 V with stable cycle ability even under a discharge current density of 6 A g^(-1). Moreover, the energy density could be increased by 23.4% when the DLC was charged to 3.0 V compared to that charged to 2.7 V.

关键词： double layer capacitor ionic liquid electrolyte high potential succinonitrile

Polymeric Wetting Matrix for a Stable Interface between Solid-state Electrolytes and Li Metal Anode

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Chinese Journal of Structural Chemistry 2022年第5期41卷 48-54页

作者： Haoran Song Shida Xue Shiming Chen Zijian Wang Yongli Song Jiawen Li Zhibo Song Luyi Yang Feng Pan School of Advanced Materials Peking University Shenzhen Graduate SchoolShenzhen 518055China

succinonitrile(SN)based solid-state electrolytes(SSEs)have potential applications in lithium(Li)batteries due to their ease of preparation and high ionic conductivity at room ***,a novel SSE consisting of poly(vinylidene fluoride-hexafluoropropy-lene)(PVDF-HFP),poly(methyl methacrylate)(PMMA)and Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3) with SN is fabricated,where PMMA is added to serve as a polymer matrix for better wettability of *** to the addition of PMMA,improved room-temperature ionic conductivity of the SSE is *** importantly,better interfacial contact as well as more stable solid-state electrolyte(SEI)layer between SSE and Li anode can be also *** a result,homogeneous and dendrite-free Li plating can be achieved for over 1000 h in Li symmetric *** coupled with LiNi_(0.5)Mn_(0.3)Co_(0.2)O_(2) cathode and Li anode,the proposed SSE delivers excellent cycling stability and rate capability in *** implementing SSEs with a polymeric wetting agent,this work provides fresh perspectives on stabilizing the interface between SSEs and Li metal anodes.

关键词： Li metal Li dendrite poly(methyl methacrylate) succinonitrile composite solid-state electrolyte