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Definitions of Pseudocapacitive materials: A Brief Review

Energy & Environmental materials 2019年第1期2卷 30-37页

作者： Yuqi Jiang Jinping Liu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhanHubei 430070China School of Chemistry Chemical Engineering and Life ScienceWuhan University of TechnologyWuhanHubei 430070China

Pseudocapacitive materials generally offer both high capacitance and high rate capability, which has stimulated great efforts in developing the materials system and related energy storage devices. In recent years, however, with the extensive use of nanomaterials in batteries, fast redox kinetics comparable to pseudocapacitive have been achieved in many kinds of battery materials due to the much shortened ion diffusion lengths and highly exposed surface/interface as a result of nanosize effect. Consequently, the terms"pseudocapacitive materials" and "battery materials" are becoming more and more confusing. In this review, different opinions on the definition of pseudocapacitive materials and the evolution of the definitions as well as the resulting confusion will be firstly reviewed. Then, to accurately distinguish pseudocapacitive and battery materials, method with the consideration of both the electrochemical signatures(CVs and GCD) and quantitative kinetics analysis as a supplement is proposed. Finally, we end this review by discussing the possible device configurations of asymmetric supercapacitors and hybrid supercapacitors. The present review will help understanding the differences between pseudocapacitive materials and battery materials, and thus avoiding the definition confusion.

关键词： definition electrochemical signatures pseudocapacitive material quantitative kinetics analysis

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Reactions between graphene oxide sheets cause irreversible agglomeration

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科学通报（英文版） 2022年第19期67卷 1943-1945页

作者： Ying Dong Jing Li Xiao-Yu Yang Department of Forensic Medicine Huazhong University of Science and TechnologyWuhan 430030China Hubei Province Key Laboratory of Coal Conversion and New Carbon Materials School of Chemistry and Chemical EngineeringWuhan University of Science and TechnologyWuhan 430081China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing&Shenzhen Research Institute&Joint Laboratory for Marine Advanced Materials in National Laboratory for Marine Science and Technology(Qingdao) Wuhan University of TechnologyWuhan 430070China School of Engineering and Applied Sciences Harvard UniversityCambridgeMA 02138USA

Graphene has received increased attention recently owing to its wide range of significant *** is comprised of planar sheets of carbon atoms arranged in six-membered ring net-works(Fig.1a).An atomically thin sheet of this substance can be regarded as molecular entity,in which nanometer-scale corruga-tions and defects create different physical and chemical *** about how these sheets interact with solvent molecules and how the defects govern these interactions is a crit-ical component of understanding and predicting the liquid-phase chemistry of *** angle measurements have been typically utilized to gain macroscopic information about interfacial interactions occurring between water and *** to its one carbon atom thickness,the top single-layer of graphene is wet-ting transparent to the underlying substrates[1,2].The surface hydrophobicity of graphene can be induced by adsorption of air-borne pollutants(e.g.,hydrocarbons)[3].In addition,graphene-based interfacial materials having either superhydrophobicity or superhydrophilicity have been developed.

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Tungsten Disulfide Coupling with Halogen Free Electrolyte for Magnesium Battery Applications

SSRN

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SSRN 2023年

作者： Alahmadi, M. El-Dek, Engy Moselhy, Mostafa A. AbdelMonem, M. Neair, Shereen H. Refai, H.S. El-Desoky, Mohamed M. Yang, Xiao-Yu Sheha, Eslam Chemistry Department College of Science Taibah University P.O. Box 344 Madinah Saudi Arabia Chemistry Department Faculty of Science Benha University Benha13518 Egypt Physics Department Faculty of Science Benha University Benha13518 Egypt Reactor Physics Department Nuclear Research Center Egyptian Atomic Energy Authority Cairo13759 Egypt Physics Department Faculty of Science Suez University Suez43518 Egypt State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures Shenzhen Research Institute School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China

Magnesium batteries are promising post-lithium storms for their low cost and high energy density. Engineering novel cathodic materials compensates the charge imbalance due to the introduction of the bivalent magnesium cation in the framework of the cathode is one of the key solutions for realizing practical Mg battery. Herein, crystal engineering of WS2 using Al doping strategy are conducted to regulate magnesium storage and electrochemical reaction kinetics of WS2 cathodes. tungsten disulfide (WS2) and Al-doped WS2 (WS2@Alx, x=0, 2 and 4 wt.%) are prepared by a one-step hydrothermal technique and used as a cathode material for magnesium batteries. We explore the Mg2+ insertion/extraction process on the WS2@Alx in the presence of halogen free electrolyte (HFE) based on 0.69 M Mg(NO3)2·6H2O dissolved in acetonitrile (ACN):tetra ethylene glycol dimethyl ether (G4) (∼2: 1). The Mg/WS2 full battery containing Al delivered high initial discharge capacity compared with the Al free cell. The introduction of anode/electrolyte polymer interface inhibits the passivation of Mg anode, via insulation between the liquid electrolyte and Mg anode. This study provides an effective method to design a practical Mg cathode and a new understanding of crystal engineering of WS2 by Al doping which may help in constructing high performance cathode for Mg batteries applications. © 2023, The Authors. All rights reserved.

关键词： Cathodes

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Preface to Special Issue in Honor of the 80th Birthday of Professor Mingyuan He

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Chinese Journal of Catalysis 2020年第7期41卷 1029-1031页

作者： Zai-Ku Xie Bao-Lian Su Haichao Liu China Petroleum&Chemical Corporation Beijing 100728China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina College of Chemistry and Molecular Engineering Peking UniversityBeijing 100871China

This special issue of Chinese Journal of Catalysis is dedicated to Professor Mingyuan He on the occasion of his 80th birthday,in recognition of his distinguished contributions to many aspects in the field of catalytic science and *** He was born on February 8,1940 in Shanghai,*** 1961,he graduated from East China Textile Engineering Institute(now Donghua University),and earned his *** in applied *** then joined the Research Institute of Petroleum processing,*** 1982?1984,he worked as a visiting scholar at the Northwestern University and the University of Texas at *** 2000,he became an adjunct professor at East China Normal University,and established the Shanghai key Laboratory of Green Chemistry and Chemical Processes in 2003.

关键词：中国科学院院士科学技术进步奖中国科学院学部香山科学会议终身成就奖高水平学术炼油催化剂中国化学会

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Electroresistance mechanism of memristive Cu 2 S thin films

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Fundamental Research 2025年

作者： Meiyan Wang Ruifeng Dong Zukang Zhu Zhengzhou Wang Lanhao Qin Yuan Li Jinsong Wu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Nanostructure Research Center Wuhan University of Technology Wuhan 430070 China School of Information Engineering Wuhan University of Technology Wuhan 430070 China

Cu 2 S has been widely used as the resistive-layer material of memristors with the advantage of low-power consumption since the Cu-ions have high mobility and migrate quickly under the applied electric field or current. However, the resistance switching mechanisms remain unclear as direct experimental evidence is still lacking. Here, we prepare several prototypes of metal-Cu 2 S-metal memristors, where the resistive layer is a thin film of polycrystalline Cu 2 S fabricated by a simple magnetron sputtering process. By fitting the resistive curves, space charge limited conduction (SCLC) and electrochemical metallization (ECM) are identified in devices using different electrodes and compliance currents. The microstructural evolutions of the devices in their working conditions are then studied by in-situ transmission electron microscopy (TEM) to directly observe the formation and rupture of the electrically conductive pathways. We find the resistance switch at small current compliance is caused by the phase transformation between γ (L)-Cu 2 S phase and the Cu-deficiency γ (D)-Cu 2-x S phase (corresponding to SCLC mechanism). Meanwhile, the origin of resistance change at a large current compliance is the formation of metal Cu filaments (corresponding to ECM mechanism). The study reveals the underlying resistive mechanisms of Cu 2 S, providing insights for its potential applications as the resistive material in high-performance memristors.

关键词： Cu 2 S memristor mechanism SCLC ECM

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In Situ Crosslinked Side Chain Polybenzimidazole Based Anion Exchange Membranes for High Performance Alkaline Direct Methanol Fuel Cells

SSRN

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SSRN 2022年

作者： Liu, Guoliang Wang, Ailian Ji, Wenxi Zhang, Fangfang Wu, Jianing Zhang, Taoyi Tang, Haolin Zhang, Haining State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Nr. 122 Luoshi Rd. Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan528200 China Research Institute of Chemical Industry Co. Ltd Beijing100013 China School of Nuclear Technology and Chemistry & Biology Hubei University of Science and Technology Nr. 88 Xianning Avenue Xianning437100 China

The practical application of quaternized polybenzimidazole (PBI) as anion exchange membranes (AEMs) is limited by the crosslinking side reaction induced low hydroxide conductivity during the operation process. In this work, the in situ crosslinking side reaction is ingeniously controlled during the membrane preparationto achieve the balance between mechanical properties and ionic conductivity of quaternized PBI based AEMs with high ion exchange capacity. The results reveal that the in situ crosslinking can not only greatly improve the mechanical properties of quaternized PBI membranes, but the high quaternization degree of ammonium hydroxide end-functionalized alkyl chain also guarantees the reasonable hydroxide conduction. The formed quaternized PBI based membrane with quaternization degree of 190% exhibits the tensile strength of 21.0 MPa under hydrated state with ion exchange capacity of 2.65 mmol g -1 and hydroxide conductivity of 82.4 mS cm -1 at 80 o C. In addition, the membrane maintains 79.7% of its initial conductivity after treating with 1 M KOH at 80 o C for 360 h. The thus-assembled alkaline direct methanol fuel cell delivers a maximum power density of 152.6 mW cm -2 using 5 M KOH and 3 M methanol fuels at 80 o C. After chronopotentiometry test at 450 mA cm -2 for 150 h, the observed 8.7% of voltage loss indicates its potential application in fuel cells. © 2022, The Authors. All rights reserved.

关键词： Ion exchange membranes

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A 3D C@AlF3 multifunctional hollow spheres lithium host for lithium metal batteries

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Journal of colloid and interface science 2025年第Pt 1期699卷

作者： Zhuo-Hang Zeng Ya-Wen Tian Qian-Yu Gao Zhi-Rong Li Zhi Qian Zi-Shuo Xia Qing-Qing Yang Zhi-Yi Hu Hemdan S H Mohamed Yu Li Bao-Lian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road 430070 Wuhan Hubei China. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road 430070 Wuhan Hubei China Nanostructure Research Centre (NRC) Wuhan University of Technology Wuhan 430070 China. Physics Department Faculty of Science Fayoum University El Gomhoria Street 63514 Fayoum Egypt. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road 430070 Wuhan Hubei China. Electronic address: yu.li@***. Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 rue de Bruxelles B-5000 Namur Belgium. Electronic address: baolian.su@unamur.ne.

Lithium (Li) metal has been deemed as an ideal anode for new generation rechargeable batteries owing to its unparalleled theoretical specific capacity, lowest electrochemical potential, and lightweight. However, volume expansion and the Li dendrites limit the performance of Li metal batteries (LMBs). In this work, we design a C@AlF hollow spheres as multifunctional lithium anode host material for Li metal battery. The hollow carbon spheric structure effectively accommodates Li to alleviate the volume expansion, and the lithiophilic AlF forms Li-Al alloy (LiAl) and LiF solid electrolyte interphase (SEI) with Li. The LiAl alloy guides the Li uniformly depositing inside the inner surface to suppress the Li dendrites formation. The LiF SEI is beneficial for Li flux to further facilitate the Li uniform deposition. Therefore, the designed Li metal anode demonstrates a lifespan over 2000 h for symmetric cells and voltage hysteresis less than 10 mA. When assembled with LiFePO cathode, the full cell provides a reversible capacity of 91.6 mAh g after 300 cycles at 1C. Our work here provides a feasible route to design a Li metal anode for high performance LMBs.

关键词： Carbon hollow spheres Dendrite-free electrode Lithiophilic AlF(3) Lithium metal battery Three-dimensional host

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Efficient and stable planar all-inorganic perovskite solar cells based on high-quality CsPbBr3 films with controllable morphology

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Journal of Energy Chemistry 2020年第7期29卷 8-15,I0001页

作者： Xiaojing Wan Ze Yu Wenming Tian Fuzhi Huang Shengye Jin Xichuan Yang Yi-Bing Cheng Anders Hagfeldt Licheng Sun State Key Laboratory of Fine Chemicals Institute of Artificial PhotosynthesisDUT-KTH Joint Education and Research Center on Molecular DevicesInstitute of Energy Science and TechnologyDalian University of Technology(DUT)Dalian 116024LiaoningChina State Key Laboratory of Molecular Reaction Dynamics and the Dynamic Research Center for Energy and Environmental Materials Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyLuoshi RoadWuhan 430070HubeiChina The Australian Centre for Advanced Photovoltaics(ACAP) Monash UniversityVictoria 3800Australia Laboratory of Photomolecular Science Ecole Polytechnique Federale de LausanneLausanne CH-1015Switzerland Department of Chemistry School of Engineering Sciences in ChemistryBiotechnology and HealthKTH Royal Institute of TechnologyStockholm 10044

All-inorganic cesium lead bromide(CsPbBr3)perovskite is attracting growing interest as functional materials in photovoltaics and other optoelectronic devices due to its superb ***,the fabrication of high-quality CsPbBr3 films still remains a big challenge by solution-process because of the low solubility of the cesium precursor in common ***,we report a facile solution-processed approach to prepare high-quality CsPbBr3 perovskite films via a two-step spin-coating method,in which the Cs Br methanol/H2 O mixed solvent solution is spin-coated onto the lead bromide films,followed by an isopropanol-assisted post-treatment to regulate the crystallization process and to control the film *** this fashion,dense and uniform CsPbBr3 films are obtained consisting of large crystalline domains with sizes up to microns and low defect *** effectiveness of the resulting CsPbBr3 films is further examined in perovskite solar cells(PSCs)with a simplified planar architecture of fluorine–doped tin oxide/compact Ti O2/CsPbBr3/carbon,which deliver a maximum power conversion efficiency of 8.11%together with excellent thermal and humidity *** present work offers a simple and effective strategy in fabrication of high-quality CsPbBr3 films for efficient and stable PSCs as well as other optoelectronic devices.

关键词： All-inorganic perovskite solar cells CsPbBr3 Morphology control Solution-processed Stability

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Ionic Liquid Modified Inorganic Nanoparticles for Gaseous Phenol Adsorption

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Journal of Wuhan University of technology(materials Science) 2019年第4期34卷 787-790页

作者： SONG Xuyan LI Ran Technology Centre of Hubei China Tobacco Industry Co. Ltd.Wuhan 430051China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Ionic liquid modified silica nanoparticles were synthesized using a simple silane chemistry,followed by substitution reaction. The phenol adsorption performance was tested using temperature programmed desorption technique. The experimental results reveal that the introduction of ionic liquids on the surface of silica nanoparticles can improve the adsorption capacity of phenol compared to the pure silica *** initial adsorption capacity reaches 0.312 mmol·g^-1 at 25 ℃ under total pressure of 0.2 bar and it decreases slightly in the following adsorption-desorption cycles. The results demonstrate that introduction of ionic liquids can improve the phenol adsorption capacity and the simple material preparation process is feasible for industrial applications.

关键词： ionic liquid phenol adsorption grafting self-assembly

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Realization of non-equilibrium process for high thermoelectric performance Sb-doped Ge Te

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Science Bulletin 2018年第11期63卷 717-725页

作者： Evariste Nshimyimana Xianli Su Hongyao Xie Wei Liu Rigui Deng Tingting Luo Yonggao Yan Xinfeng Tang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

Pristine GeTe shows inferior thermoelectric performance around unit due to the large carrier concentration induced by the presence of intrinsic high concentration of Ge vacancy. In this study, we report a thermoelectric figure of merit ZT of 1.56 at 700 K, realized in Sb-doped GeTe based thermoelectric(TE)materials via combined effect of suppression of intrinsic Ge vacancy and Sb doping. The nonequilibrium nature during melt spinning process plays very important role. For one thing, it promotes the homogeneity in Ge_(1-x)Sb_xTe samples and refines the grain size of the product. Moreover the persistent Ge precipitated as impurity phase in the traditional synthesis process is found to be dissolved back into the GeTe sublattice, accompanying with a drastic suppression of Ge vacancies concentration which in combination with Sb electron doping significantly reduced the inherent carrier concentration in *** carrier concentration, approaching the optimum carrier concentration ～3.74 × 10^(-20) cm^(-3) and a high power factor of 4.01 × 10^(-3) W m^(-1)K^(-2) at 750 K are achieved for Ge_(0.98)Sb_(0.02) Te sample. In addition,the enhanced grain boundary phonon scattering by refining the grain size through melt spinning(MS)process, coupled with the intensified alloying phonon scattering via Sb doping leads to low thermal conductivity of 1.53 W m^(-1) K^(-1) at 700 K for Ge_(0.94) Sb_(0.06) Te sample. All those contribute to a high ZT value,representing over 50% improvement in the ZT value compared to the Sb free samples, which provides an alternative way for ultrafast synthesis of high performance GeTe based thermoelectric material.

关键词： GeTe Sb doping MS-SPS process Thermoelectric properties

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