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High performance Zn-I_(2)battery with acetonitrile electrolyte working at low temperature

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Nano Research 2022年第4期15卷 3170-3177页

作者： Chunlai Song Zongshuai Gong Chong Bai Fengshi Cai Zhihao Yuan Xizheng Liu School of Materials Science and Engineering Tianjin Key Laboratory of Photoelectric Materials&DevicesKey Laboratory of Display Materials and Photoelectric Devices of Ministry of EducationTianjin University of TechnologyNo.391 Binshuixi RoadTianjin 300384China

Large scale applications of metal-iodine batteries working at sub-zero degree have been challenged by the limited capacity and performance degradation.Herein,we firstly propose a Zn-I_(2)battery working at low temperature with a carbon composite material/iodine(CCM-I_(2))cathode,a Zn anode and an environmentally tolerable Zn(ClO4)2-ACN electrolyte.The CCM framework with hierarchical porous structure endows a powerful iodine-anchoring to overcome undesirable dissolution of iodine in organic electrolyte,and the Zn(ClO4)2-ACN electrolyte with low freezing point and high ionic conductivity enhances the low temperature performance.The synergies enable an efficiently reversible conversion of Zn-I_(2)battery even at-40℃.Therefore,the resultant Zn-I_(2)battery delivers a high specific capacity of 200 mAh·g^(-1),which is fairly approximate to the theoretical capacity of I_(2)(211 mAh·g^(-1))and a superior cycling stability with minimal capacity fading of 0.00043%per cycle over 7,000 times under 2C at-20℃.Furthermore,even at-40℃,this Zn-I_(2)battery still exhibits a good capacity retention of 68.7%compared to the capacity at 25℃ and a rapid capacity-recover ability with elevating temperature change.Our results distinctly indicate this Zn-I_(2)battery can be 1competent for the practical application under low temperature operation.

关键词： Zn-I_(2)battery low temperature acetonitrile electrolyte carbon composite material high performance

Wide-temperature rechargeable Li metal batteries enabled by an in-situ fabricated composite gel electrolyte with a hierarchical structure

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Fundamental Research 2022年第4期2卷 611-618页

作者： Chao Ma Xizheng Liu Hui Geng Xiaoshu Qu Wei Lv Yi Ding Tianjin Key Laboratory of Advanced Functional Porous Materals Instute for New Energy Materials and Low-Carbon Technologies School of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China henzhen Geim Graphene Center Engineerng Laboratory for Functionalized Carbon MaterialsTsinghua Shenzhen International Graduate SchoolTsinghua UniversiyShenzhen518055China Jilin Institute of Chemical Technology Jlin 132073China

Lithium metal bateries(LMBs)are well recognized as promising next-generation high energy density batteries,but the uncontrollable Li dendrites growth and the volatilization/gas production of electrolytes,which become extremely worse at low and high temperatures,restrict their practical utilizations.In this work,a hierarchically structured polymerized gel electrolyte(HGE),which was composed of an inorganic(Li_(x)Ga_(86) In_(14) alloy and Licl salt)/organic(polymerized tetrahydrofuran(THF)hybrid layer and the bulk polymerized THF electrolyte,was proposed to achieve a steady performance of LMBs over a wide temperature range of-20-55℃.The HGE fabrication can be completed within ssembled ells with a simultaneously occurring replacement-polymerizationalloying reaction,which helps decrease the interfacial resistance and enhance the stability and ion diffusion under both low and high temperatures.The use of THF with low polarity also ensures high ion conductivity under low temperatures.With such HGE,the Li symmetric cell showed low overpotential under 10 mA/cm^(2) with a capac.ity of 10 mAh/cm^(2) over a 1200 h cycling,and the fullcell coupled with Li_(4)Ti_(5)O_(12) demonstrated high capacity retention over 5000 cycles at room temperature.Besides,the symmetric cells showed low overpotentials of 12 mV at 55℃ and 80 mV at-20℃ at 2 mA/cm^(2) after a 1000 h cyeling,and the full cell revealed the high capacity retention of 93.5%at 55℃ and 88.8%at-20℃ after 1500 cycles under a high current density of 1000 mA/g.This work shows a hierarchically structured polymerized electrolyte design for advanced Li batteries workable under broad temperatures.

关键词： Lithium metal anode Hierarchical gel eletrolyte In-situ polymerization Wide temperature LiGaln lloy

Reversible Low Temperature Li-Storage in Liquid Metal Based Anodes via a Co-Solvent Strategy

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Chinese Journal of Chemistry 2021年第10期39卷 2801-2807页

作者： Mengdi Zhang Xiaofeng Lei Yang Lv Xizheng Liu Yi Ding ianjin Key Laboratory of Advanced Functional Porous Materials Institute for New Energy Materials and Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin300384 China

Main observation and conclusion The application of lithium-ion batteries in cold climates has been hindered due to the decline in performance at low temperatures.The increased de-solvation energy and formation of Li dendrites at the anode surface emerge as the major challenges,which rely on the development of stable anode and compatible electrolytes.Herein,a self-healing GaInSn liquid metal(LM)based electrode coupled with a multi-solvent electrolyte is proposed toward reversible Li-storage at low temperatures.By using methyl butyrate(MB)as a co-solvent in 1 mol·L^(–1)LiTFSI of ethylene carbonate and diethyl carbonate,the electrolyte viscosity decreases from 52.07 to 13.75 mPa·s,while the ionic conductivity increases from 1.38 to 3.44 mS·cm^(–1)at–20°C.Moreover,the Li/MXene@LM cells can display a discharge capacity of 500 mAh·g^(–1),with capacity retention of 78%at–20°C after 120 cycles.It is disclosed that a uniform LiF-rich solid electrolyte interface(SEI)layer on the anode is formed upon the addition of MB,which promotes the desolvation of Li ions at the interface of electrode/electrolyte especially at low temperatures.These results prove that MB as the co-solvent is well compatible with LM based anodes and holds great potential for the exploration of low-temperature energy devices.

关键词： Methyl butyrate Solvent effects Alloys Low temperature Lithium

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 situ preparation of gel polymer electrolyte for lithium batteries: Progress and perspectives

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InfoMat 2022年第2期4卷 110-125页

作者： Chao Ma Wenfeng Cui Xizheng Liu Yi Ding Yonggang Wang Tianjin Key Laboratory of Advanced Functional Porous Materials Institute for New Energy Materials and Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjinChina Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New EnergyiChEM(Collaborative Innovation Center of Chemistry for Energy Materials)Fudan UniversityShanghaiChina

The practical applications of Li-ion batteries(LIBs)are challenged by their safety concerns when using liquid electrolytes(LEs).Solid-state gel polymer electrolytes(GPEs)can address this challenge and have drawn increased attention recently.Normally,GPEs are prepared separately and then assembled into cells,which undoubtedly result in dissatisfactory solid/solid interfacial compatibility and low ionic conductivity.Fortunately,in situ GPEs are proposed to address the above challenges and simplify the preparation process.Typically,LE precursor is injected into the cells and gradually transformed into a quasisolid gel state under the conditions of thermal or chemical initiators.Consequently,the obtained in situ GPEs could fully infiltrate the electrode and better interface contact of gel electrolyte/electrode is thus inherited.In this review,the authors focus on the in situ GPEs used in lithium batteries(LBs),and summarize recent progress of the design,synthesis,and applications of in situ GPEs.Based on the different ways of triggering polymerization,there are mainly three methods:thermochemical gelation,polymerization by additional chemical initiators,and cross-linking initiated by Li O bond.Composite GPEs based on in situ solidification method are introduced as a promising strategy to improve the electrochemical performances.Finally,up-to-date research progresses are discussed,and perspectives are provided on the development and challenges of in situ GPEs to meet the requirements for their practical applications in LBs.

关键词： cross-linking gel electrolytes in situ preparation Li-metal batteries polymerization

Characterization and evaluation of a femtosecond laser-induced osseointegration and an anti-inflammatory structure generated on a titanium alloy

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Regenerative Biomaterials 2021年第2期8卷 104-117页

作者： Yang liu Zhongying Rui Wei Cheng Licheng Song Yunqiang Xu Ruixin Li xizheng Zhang Department of Orthopedics Tianjin Medical University General HospitalTianjin 300052China Institute of Medical Service Support Institute of Systems EngineeringAcademy of Military SciencesTianjinChina Department of Nuclear Medicine Tianjin Medical University General HospitalTianjin 300052China Tianjin Key Laboratory of Oral and Maxillofacial Function Reconstruction Tianjin Stomatological HospitalThe Affiliated Stomatological Hospital of Nankai UniversityTianjin 300041China

Cell–material interactions during early osseointegration of the bone–implant interface are critical and involve crosstalk between osteoblasts and osteoclasts.The surface properties of titanium implants also play a critical role in cell–material interactions.In this study,femtosecond laser treatment and sandblasting were used to alter the surface morphology,roughness and wettability of a titanium alloy.Osteoblasts and osteoclasts were then cultured on the resulting titanium alloy disks.Four disk groups were tested:a polished titanium alloy(pTi)control;a hydrophilic micro-dislocation titanium alloy(sandblasted Ti(STi));a hydrophobic nano-mastoid Ti alloy(femtosecond laser-treated Ti(FTi));and a hydrophilic hierarchical hybrid micro-/nanostructured Ti alloy[femtosecond laser-treated and sandblasted Ti(FSTi)].The titanium surface treated by the femtosecond laser and sandblasting showed higher biomineralization activity and lower cytotoxicity in simulated body fluid and lactate dehydrogenase assays.Compared to the control surface,the multifunctional titanium surface induced a better cellular response in terms of proliferation,differentiation,mineralization and collagen secretion.Further investigation of macrophage polarization revealed that increased anti-inflammatory factor secretion and decreased proinflammatory factor secretion occurred in the early response of macrophages.Based on the above results,the synergistic effect of the surface properties produced an excellent cellular response at the bone–implant interface,which was mainly reflected by the promotion of early ossteointegration andmacrophage polarization.

关键词： femtosecond laser hybrid micro-/nanostructure cell–material interactions osseointegration macrophage polarization

Porous-hollow nanorods constructed from alternate intercalation of carbon and MoS2 monolayers for lithium and sodium storage

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Nano Research 2019年第8期12卷 1912-1920页

作者： Laiying Jing Gang Lian Junru Wang Mingwen Zhao Xizheng Liu Qilong Wang Deliang Cui Ching-Ping Wong State Key Lab of Crystal Materials Shandong UniversityJinan 250100China School of Physics Shandong UniversityJinan 250100China Tianjin Key Laboratory of Advanced Functional Porous Materials Institute for New Energy Materials and Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China Key Laboratory for Special Functional Aggregated Materials of Education Ministry School of Chemistry and Chemical Engineering Shandong UniversityJinan 250100China School of Materials Science and Engineering Georgia Institute of Technology AtlantaGeorgia 30332USA

Weak ion diffusion and electron transport due to limited interlayer spacing and poor electrical conductivity have been identified as critical roadbacks for fast and abundant energy storage of both MoS2-based lithium ion batteries (LIBs) and sodium ion batteries (SIBs). In this work, MoS2 porous-hollow nanorods (MoS2/m-C800) have been designed and synthesized via an annealing-followed chemistry-intercalated strategy to solve the two issues. They are uniformly assembled from ultrathin MoS2 nanosheets, deviated to the rod-axis direction, with expanded interlayer spacing due to alternate intercalation of N-doped carbon monolayers between the adjacent MoS2 monolayers. Electrochemical studies of the MoS2/m-C800 sample, as an anode of LIBs, demonstrate that the superstructure can deliver a reversible discharge capacity of 1,170 mAh·g^-1 after 100 cycles at 0.2 A·g^-1 and maintain a reversible capacity of 951 mAh·g^-1 at 1.25 A·g^-1 after 350 cycles. While for SIBs, the superstructure also delivers a reversible discharge capacity of 350 mAh·g^-1 at 0.5 A-g-1 after 500 cycles and exhibits superior rate capacity of 238 mAh·g^-1 at 15 A·g^-1 .The excellent electrochemical performance is closely related with the hierarchical superstructures, including expanded interlayer spacing, alternate intercalation of carbon monolayers and mesoporous feature, which effectively reduce ion diffusion barrier, shorten ion diffusion paths and improve electrical conductivity.

关键词： lithium/sodium ion batteries porous-hollow nanorods expanded interlayer spacing alternate intercalation ultrathin nanosheets

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光放大器原理及其发展

激光杂志 2024年第5期45卷 1-14页

作者：李征刘新雨柯熙政西安理工大学自动化与信息工程学院西安710048 西安文理学院西安710065 陕西省智能网络协同军民共建重点实验室西安710068

光通信系统的工作性能,除与光源有关外,还与其传输媒质有关。随着光纤技术的发展,通过追求光通信领域的远距离传输,诞生了光放大器,光放大器可以做到直接放大光信号,在通信领域有很大的应用价值。总结了光放大器的基本原理及其发展。首... 详细信息

光通信系统的工作性能,除与光源有关外,还与其传输媒质有关。随着光纤技术的发展,通过追求光通信领域的远距离传输,诞生了光放大器,光放大器可以做到直接放大光信号,在通信领域有很大的应用价值。总结了光放大器的基本原理及其发展。首先介绍了光放大器的概念、分类和原理。然后分别对三类光放大器的关键技术进行了介绍,包括工作原理与性能方面,然后对各类光放大器的国内外现状进行了分析。最后,对光放大器未来的发展进行了展望。

关键词：掺铒光纤放大器拉曼光纤放大器半导体光放大器无线光通信

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基于人本位城市道路细节设计探讨

城市道桥与防洪 2019年第9期 47-48,61,M0007页

作者：刘锡正上海市政工程设计研究总院(集团)有限公司

随着经济和社会的发展,人本位理念在社会中的影响力提升,细节人性化设计成为城市道路的重要发展方向。通过对城市道路的主要特点分析,分别从道路交叉口、无障碍设施、交通标志以及道路绿化等几个主要方面提出道路设计中经常出现的问题... 详细信息

随着经济和社会的发展,人本位理念在社会中的影响力提升,细节人性化设计成为城市道路的重要发展方向。通过对城市道路的主要特点分析,分别从道路交叉口、无障碍设施、交通标志以及道路绿化等几个主要方面提出道路设计中经常出现的问题。结合实际工程经验,提出必要的建议,可供相关同行进行参考。

关键词：人本位城市道路细节设计