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Journal of Energy Chemistry 2021年第7期30卷 85-93页

作者： Su Wang Qifang Sun Wenxiu Peng Yue Ma Ying Zhou Dawei Song Hongzhou Zhang Xixi Shi Chunliang Li Lianqi Zhang tianjin Key Laboratory for Photoelectric Materials and Devices School of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China Shandong Ruifu Lithium Co. LtdTaian 271601ShandongChina

Lithium metal is one of the most promising anodes for next-generation batteries due to its high capacity and low reduction ***,the notorious Li dendrites can cause the short life span and safety issues,hindering the extensive application of lithium ***,Li_(7)La_(3)Zr_(2)O_(12)(LLZO)ceramics are integrated into polyethylene oxide(PEO)to construct a facile polymer/inorganic composite solid-state electrolyte(CSSE)to inhibit the growth of Li dendrites and widen the electrochemical stability *** the feasibility of our strategy,the designed PEO-LLZO-LiTFSI composite solid-state electrolyte(PLLCSSE)exhibits an outstanding cycling property of 134.2 mAh g^(-1) after 500 cycles and the Coulombic efficiency of 99.1%after 1000 cycles at 1 C in LiFePO_(4)-Li *** cooperated with LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)(NCM622)cathode,the PLL-CSSE renders a capacity retention of 82.4%after 200 cycles at 0.2 *** importantly,the uniform dispersion of LLZO in PEO matrix is tentative tested via Raman and FT-IR spectra and should be responsible for the improved electrochemical *** same conclusion can be drawn from the interface investigation after *** work presents an intriguing solid-state electrolyte with high electrochemical performance,which will boost the development of all-solid-state lithium batteries with high energy density.

关键词： All-solid-state lithium battery Polymer/inorganic composite electrolyte Uniformly dispersion Interface compatibility

A sustainable aqueous Zn-I2 battery

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Nano Research 2018年第7期11卷 3548-3554页

作者： Chong Bai Fengshi Cai Lingchang Wang Shengqi Guo Xizheng Liu Zhihao Yuan School of Materials science and Engineering Tianjin University Tianjin 300072 China School of Materials science and Engineering Tianjin Key Lab for Photoelectric Materials & Devices Tianjin University of Technology Tianjin 300384 China

Rechargeable metal-iodine batteries are an emerging attractive electrochemical energy storage technology that combines metallic anodes with halogen cathodes. Such batteries using aqueous electrolytes represent a viable solution for the safety and cost issues associated with organic electrolytes. A hybrid-electrolyte battery architecture has been adopted in a lithium-iodine battery using a solid ceramic membrane that protects the metallic anode from contacting the aqueous electrolyte. Here we demonstrate an eco-friendly, low-cost zinc-iodine battery with an aqueous electrolyte, wherein active I2 is confined in a nanoporous carbon cloth substrate. The electrochemical reaction is confined in the nanopores as a single conversion reaction, thus avoiding the production of I3- intermediates. The cathode architecture fully utilizes the active I2, showing a capacity of 255 mAh·g^-1 and low capacity cycling fading. The battery provides an energy density of -151 Wh·kg^-1 and exhibits an ultrastable cycle life of more than 1,500 cycles.

关键词： aqueous battery nanoporous carbon iodine zinc cycle life

In/ex-situ Raman spectra combined with EIS for observing interface reactions between Ni-rich layered oxide cathode and sulfide electrolyte

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Journal of Energy Chemistry 2020年第9期29卷 195-202,I0006页

作者： Xuelei Li Huilan Guan Zhijie Ma Ming Liang Dawei Song Hongzhou Zhang Xixi Shi Chunliang Li Lifang Jiao Lianqi Zhang tianjin Key Laboratory for Photoelectric Materials and Devices School of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071China

The interfacial instability between Ni-rich layered oxide cathodes and sulfide electrolytes is a serious problem,leading to poor electrochemical properties of all-solid-state lithium batteries(ASSLB).The chemical/electrochemical side reactions are considered to be the origin of the interfacial ***,the influence of chemical and electrochemical side reactions on the interfacial deterioration is rarely studied *** this work,the deterioration mechanism of the interface between LiNi0.85-xCo0.15AlxO2 and Li10GeP2S12 is investigated in detail by combining in/ex-situ Raman spectra and Electrochemical Impedance Spectroscopy(EIS).It can be determined that chemical side reaction between LiNi0.8Co0.15Al0.05O2 and Li10GeP2S12 will occur immediately once contacted,and the interfacial deterioration becomes more serious after charge-discharge process under the dual effects of chemical and electrochemical side ***,our research reveals that the interfacial stability and the cycle performance of ASSLB can be greatly enhanced by increasing Al-substitution for Ni in *** particular,the capacity retention of LiNi0.6Co0.15Al0.25O2 cathode after 200 cycles can reach 81.9%,much higher than that of LiNi0.8Co0.15Al0.05O2 cathode(12.5%@200 cycles).This work gives an insight to study the interfacial issues between Ni-rich layered oxide cathode and sulfide electrolyte for ASSLBs.

关键词： All-solid-state lithium batteries Ni-rich layered oxide cathode Sulfide electrolytes Interfacial stability Chemical/electrochemical reactions

Integrated Control Strategy for CVT Powertrains with Consideration of Vehicle Drivability

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Chinese Journal of Mechanical Engineering 2012年第3期25卷 515-523页

作者： SUN Dongye LUO Yong QIN Datong State Key Laboratory of Mechanical Transmission Chongqing UniversityChongqing 400044China

During shift,power flow is not interrupted in powertrains equipped with continuously variable transmission（CVT）.When hard acceleration is commanded,engine speed will flare and corresponding torque will be consumed,which leads to a drop in vehicle drive torque and also the vehicle *** is the reason why CVT vehicles have poor drivability during hard acceleration *** method such as torque compensation doesn＇t always work due to the limited backup torque of *** to this,means to evaluate the drivability of CVT vehicles are studied,affect factors of drivability are analyzed in *** acceleration process of CVT vehicle is studied by theoretical analysis,based on which engine torque and ratio change rate of CVT are identified as two key control parameters that decide the drivability of CVT vehicles during hard acceleration ***,a control strategy based on restricting the change rate of CVT ratio together with torque compensation is proposed,and two different algorithms to establish the limitation of ratio change rate are *** two algorithms are simulated and compared with each other,results indicate that drop of vehicle acceleration is eliminated evidently by limit the change rate of CVT ratio,but small ratio change rate also results in a longer time to finish the accelerate process,an algorithm to decide a proper ratio change rate is needed in order to tune these different *** order to get better control effects,a new fuzzy logic based algorithm is proposed to decide a proper ratio change rate during kick down conditions,simulation and experiment results indicate that,the amount of vehicle acceleration decrease is reduced from about 1 m/s2 to almost 0,in the mean time the accelerate process only delayed for about 0.3 *** proposed control strategy and algorithm can effectively tune the characteristics of CVT equipped vehicle during kick down conditions.

关键词： vehicles continuously variable transmission control strategy drivability

Analysis of terahertz waveguide modes in continuous wavelet domain

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Chinese Optics Letters 2010年第11期8卷 1057-1060页

作者：谷建强田震邢岐荣王昌雷栗岩锋刘丰柴路王清月 Center for Terahertz Waves and Ultrafast Laser Laboratory College of Precision Instrument and Optoelectronics EngineeringKey Laboratory of Opto-Electronics Information and Technical Science (Ministry of Education)Tianjin University

Conventional analytical methods in the wavelet domain are used to present an analysis of terahertz （THz） waveguide *** obtain THz radiation pulses passing through a waveguide,we build a simple experimental system with a 5-mm-long,230-μm-inner-diameter stainless steel *** single-mode guided signal from the experiments and the multi-mode signal of a similar THz waveguide reported in the literature are analyzed using the continuous wavelet transform （CWT）.The results demonstrate that analyzing THz waveguide modes in the wavelet domain not only possesses all the functionality of the traditional THz time-domain spectroscopy （TDS） data processing but also has the ability to unscramble quantitatively and intuitively detailed information about the target samples,such as mode type,cut-off frequency,amplitude distinction,and group velocity.

关键词： Data handling Stainless steel Terahertz waves Time domain analysis Waveguides Wavelet transforms

Plasmon-induced transparency in terahertz metamaterials

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science China(Information sciences) 2013年第12期56卷 73-90页

作者： JING HuiHui ZHU ZhiHua ZHANG XueQian GU JianQiang TIAN Zhen OUYANG ChunMei HAN JiaGuang ZHANG WeiLi Center for Terahertz waves and College of Precision Instrument and Optoelectronics Engineering Tianjin University and the Key Laboratory of Optoelectronics Information Technology (Ministry of Education) School of Electrical and Computer Engineering Oklahoma State University

The quantum phenomena of electromagnetically induced transparency(EIT)or plasmonic analogue of electromagnetically induced transparency(PIT)can be mimicked in the classical resonators,leading to a unique way to explore the coherent coupling mechanism in metamaterial *** metamaterial structures have been proposed to excite and manipulate the PIT efect with flexibility and performance with geometry-controllable,polarization-independent,broadband-transparency and active-modulated *** in turn promise the fascinating functionalities and applications of the PIT efects,such as slow-light components,nonlinear devices and high-sensitivity ***,we present a review on the progress in developing the PIT efect in terahertz metamaterials over the past few years.

关键词： PIT terahertz metamaterial Q factor plasmon coupling

Terahertz spectral properties of melamine and its deuterated isotope,melamine-d_6

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Nuclear science and techniques 2012年第4期23卷 209-214页

作者： HE Mingxia LI Meng TIAN Zhen CAO Wei HAN Jiaguang Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering Tianjin UniversityTianjin 300072China School of Electrical and Computer Engineering Oklahoma State UniversityStillwaterOklahoma 74078USA

The far-infrared optical properties of melamine and its deuterated isotope,melamine-d_6 were experimentally and theoretically investigated in the frequency range from 0.2 to 3.0 *** the room temperature and dry air nitrogen conditions,three absorption bands were observed at 2.0,2.3 and 2.6 THz in the melamine sample by use of terahertz time-domain ***,in the melamine-d_6 sample,the observed absorption bands shift towards lower frequencies and the relative intensity of the absorption bands *** simulation results based on the Parameterized Model number 3(PM3) were compared with the experimental data and the observed vibration spectra were assigned according to the PM3 *** absorption bands of the measured melamine samples at terahertz frequencies are highly correlated with the intermolecular hydrogen bond stretching and π-π stacking ***,the red shift of the absorption bands is due to hydrogen/deuterium substitution.

关键词：太赫兹时域光谱三聚氰胺氘同位素光谱特性分子间氢键频率范围实验数据吸收带

Equivalent circuit analysis of terahertz metamaterial filters

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Chinese Optics Letters 2011年第11期9卷 58-62页

作者：张学迁李泉曹伟岳伟生谷建强田震韩家广张伟力 Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering and Key Laboratory of Opto-electronics Information TechnologyMinistry of EducationTianjin University School of Electrical and Computer Engineering Oklahoma State University Advanced Nanofabrication Imaging and Characterization Core FacilitiesKing Abdullah University of Science and Technology

An equivalent circuit model for the analysis and design of terahertz （THz） metamaterial filters is *** proposed model,derived based on LMC equivalent circuits,takes into account the detailed geometrical parameters and the presence of a dielectric substrate with the existing analytic expressions for self-inductance,mutual inductance,and *** model is in good agreement with the experimental measurements and full-wave *** the circuit model has made it possible to predict accurately the resonance frequency of the proposed structures and thus,quick and accurate process of designing THz device from artificial metamaterials is offered.

关键词： Computer simulation Dielectric materials Electric network analysis Inductance Metamaterials

Graphene oxide assisted facile hydrothermal synthesis of LiMn_(0.6)Fe_(0.4)PO_4 nanoparticles as cathode material for lithium ion battery

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Journal of Energy Chemistry 2014年第3期23卷 397-402页

作者： Changchang Xu Li Li Fangyuan Qiu Cuihua An Yanan Xu Ying Wang Yijing Wang Lifang Jiao Huatang Yuan Institute of New Energy Material Chemistry Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)Key Laboratory of Advanced Energy Materials ChemistryNankai University

Assisted by graphene oxide（GO）,nano-sized LiMn0.6Fe0.4PO4 with excellent electrochemical performance was prepared by a facile hydrothermal method as cathode material for lithium ion *** and TEM images indicate that the particle size of LiMn0.6Fe0.4PO4（S2）was about 80 nm in *** discharge capacity of LiMn0.6Fe0.4PO4 nanoparticles was 140.3 mAh-g^1 in the first *** showed that graphene oxide was able to restrict the growth of LiMn0.6Fe0.4PO4 and it in situ reduction of GO could improve the electrical conductivity of LiMn0.6Fe0.4PO4 material.

关键词： hydrothermal method cathode material lithium-ion batteries graphene oxide nano-particles

Towards safe lithium-sulfur batteries from liquid-state electrolyte to solid-state electrolyte

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Frontiers of Materials science 2023年第1期17卷 15-50页

作者： Zhiyuan Pang Hongzhou Zhang Lu Wang Dawei Song Xixi Shi Yue Ma Linglong Kong Lianqi Zhang tianjin Key Laboratory for Photoelectric Materials and Devices School of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China College of Chemistry and Materials science Shandong Agricultural UniversityTaian 271018China State Forestry and Grassland Administration Key Laboratory of Silviculture in Downstream Areas of the Yellow River School of ForestryShandong Agricultural UniversityTaian 271018China

Lithium-sulfur(Li-S)battery has been considered as one of the most promising future batteries owing to the high theoretical energy density(2600 W-h-kg-1)and the usage of the inexpensive active materials(elemental sulfur).The recent progress in fundamental research and engineering of the Li-S battery,involved in electrode,electrolyte,membrane,binder,and current collector,has greatly promoted the performance of Li s batteries from the laboratory level to the approaching practical ***,the safety concerns still deserve attention in the following application *** review focuses on the development of the electrolyte for Li S batteries from liquid state to solid *** problems and the corresponding solutions are emphasized,such as the soluble lithium polysulfides migration,ionic conductivity of electrolyte,the interface contact between electrolyte and electrode,and the reaction ***,future perspectives of the safe and high-performance Li S batteries arealso introduced.

关键词： lithium-sulfur battery liquid electrolyte polymer electrolyte solid-state electrolyte battery safety