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Hydrophobic epoxy resin coating with ionic liquid conversion pretreatment on magnesium alloy for promoting corrosion resistance

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Journal of Materials Science & Technology 2020年第2期37卷 9-18页

作者： Liting Guo Changdong Gu Jie Feng Yongbin Guo Yuan Jin jiangping tu School of Materials Science and Engineering State Key Laboratory of Silicon MaterialsZhejiang UniversityHangzhou310027China Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province Hangzhou310027China College of Materials Science&Engineering Zhejiang University of TechnologyHangzhou310014China Zotye Automobile Co.Ltd Hangzhou310018China

A hydrophobic epoxy resin coating with an environmental-friendly deep eutectic solvent(DES)-based conversion pretreatment was proposed to enhance the corrosion resistance of magnesium *** hydrophobic epoxy resin coatings on the AZ31B magnesium alloy with and without the DES-based conversion pretreatment were thoroughly *** is found that the DES-based conversion film on the AZ31B magnesium alloy is mainly composed of MgH2,MgO and ***,the conversion film possesses porous structure,which provides more anchor points for the following epoxy resin ***,without the DES-conversion pretreatment,the epoxy resin is difficult to be attached on the substrate during the dip-coating *** double layered hybrid coating system promotes the corrosion resistance of the magnesium alloys significantly,which can be ascribed to the unique architecture and component including the hydrophobicity of the surface layer,the dense and interlocked epoxy resin,and the corrosion resistant DES-based conversion pretreatment.

关键词： Mg alloy Deep eutectic solvent Corrosion resistance Double layered hybrid coating

INTERNAL CHLORINATION OF Ni-Cr-Ce ALLOY EXPOSURE TO CHLORINE AT 575℃

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Transactions of Nonferrous Metals Society of China 1996年第1期6卷 106-109页

作者： tu jiangping Liu Maoshen Mao Zhiyuan Li Zhizhang Department of Materials Science and Engineering Zhejiang University Hangzhou 310027

The kinetics of internal chlorination of Ni-Cr-Ce alloy in chlorine at 575℃ has been *** chlorination of Ni-Cr-Ce alloy occurred to formation of CrCl_(2) and CeCl_(3) solid precipi-tates which is thermodynamically stable and has lower vapor pressure at the temperature along grain *** initial corrosion stage,the internal chlorination rate nearly followed parabolic rate law,the internal chlorination was accompanied by the consumption of the alloy by volatilization corrosion which obeyed a linear rate equation,the thickness of the internal chlorination region would be governed by a paralinear rate *** a sufficiently long period of corrosion,the rate of internal chlorina-tion would be equal to the rate of overall metal consumption,the depth of internal chlorination approaches a steady state *** of Ce to Ni-Cr alloy increased the degree of internal chlorination.

关键词： internal chlorination vapor pressure chloride

All-solid-state electrochromic devices based on WO3‖NiO films:material developments and future applications

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Science China Chemistry 2017年第1期60卷 3-12页

作者： Ding Zhou Dong Xie Xinhui Xia Xiuli Wang Changdong Gu jiangping tu State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province and School of Materials Science and Engineering Zhejiang University Hangzhou 310027 China Cyrus Tang Center for Sensor Materials and Applications Zhejiang University Hangzhou 310027 China

Electrochromism refers to the persistent and reversible change of optical properties by an applied voltage ***(EC)devices have been extensively studied because of their commercial applications in smart windows of green buildings,display devices and thermal control of *** this review,a basic EC device design is presented based on useful oxides and solid-state *** focus on the state-of-the-art research activities related to the structures of tungsten oxide(WO_3)and nickel oxide(NiO),summarizing the strategies to improve their EC performances and further applications of devices.

关键词： electrochromic devices tungsten oxide nickel oxide solid-state electrolyte electrochromism

High-energy cathode materials for Li-ion batteries: A review of recent developments

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Science China(Technological Sciences) 2015年第11期58卷 1809-1828页

作者： ZHANG YiDi LI Yi XIA XinHui WANG XiuLi GU ChangDong tu jiangping State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province and School of Materials Science and Engineering Zhejiang University

Lithium ion batteries （LIBs） represent one of the most promising solutions for environmentally friendly transportation such as electric vehicles. The demand for high energy density, low cost and environmentally friendly batteries makes high-capacity cathode materials very attractive for future LIBs. Layered LiNixCoyMn2O2 （x＋y＋z=1）, Li-rich oxides and Li-V-O compounds have attracted much attention due to their high capacities in recent years. In this review, we focus on the state-of-the-art research activities related to LiNixCoyMn2O2, Li-rich oxides and Li-V-O compounds, including their structures, reaction mechanisms during cycling, challenges and strategies that have been studied to improve their electrochemical performances.

关键词： layered LiNixCoyMn2O2 Li-rich layered oxide Li-V-O compound cathode material Li-ion battery

Integrated carbon nanospheres arrays as anode materials for boosted sodium ion storage

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Green Energy & Environment 2018年第1期3卷 50-55页

作者： Wangjia Tang Jianbo Wu Xiuli Wang Xinhui Xia jiangping tu State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Provinceand School of Materials Science and EngineeringZhejiang University Zhejiang Provincial Key Laboratory for Cutting Tools Taizhou University

Developing cost-effective advanced carbon anode is critical for innovation of sodium ion batteries. Herein, we develop a powerful combined method for rational synthesis of free-standing binder-free carbon nanospheres arrays via chemical bath plus hydrothermal process. Impressively,carbon spheres with diameters of 150-250 nm are randomly interconnected with each other forming highly porous arrays. Positive advantages including large porosity, high surface and strong mechanical stability are combined in the carbon nanospheres arrays. The obtained carbon nanospheres arrays are tested as anode material for sodium ion batteries(SIBs) and deliver a high reversible capacity of 102 mAh g^(-1) and keep a capacity retention of 95% after 100 cycles at a current density of 0.25 A g^(-1) and good rate performance(65 mAh g^(-1) at a high current density of 2 A g^(-1)). The good electrochemical performance is attributed to the stable porous nanosphere structure with fast ion/electron transfer characteristics.

关键词： Carbon nanospheres Anode Sodium ion batteries Arrays Porous film

Three-dimensional interconnected cobalt oxide-carbon hollow spheres arrays as cathode materials for hybrid batteries

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Progress in Natural Science:Materials International 2016年第3期26卷 253-257页

作者： Jiye Zhan Xinhui Xia Yu Zhong Xiuli Wang jiangping tu State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province and School of Materials Science and Engineering Zhejiang University

Hierarchical porous metal oxides arrays is critical for development of advanced energy storage ***, we report a facile template-assisted electro-deposition plus glucose decomposition method for synthesis of multilayer CoO/C hollow spheres arrays. The CoO/C arrays consist of multilayer interconnected hollow composite spheres with diameters of350 nm as well as thin walls of20 *** hollow spheres architecture with 3D porous networks are achieved. As cathode of high-rate hybrid batteries, the multilayer CoO/C hollow sphere arrays exhibit impressive enhanced performances with a high capacity(73.5 m Ahg-1at 2 Ag-1), and stable high-rate cycling life(70 m Ahg-1after12,500 cycles at 2 Ag-1). The improved electrochemical performance is owing to the composite hollowsphere architecture with high contact area between the active materials and electrolyte as well as fast ion/electron transportation path.

关键词： Cobalt oxide Hollow spheres Cathode Arrays Hybrid battery

Effect of rapid quenching on the microstructure and electrochemical characteristics of La_(0.6)Ce_(0.4)Ni_(3.6)Co_(0.65)Mn_(0.4)Al_(0.2)Ti_(0.05_(FeB)_(0.1) hydrogen storage alloy

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Rare Metals 2010年第6期29卷 593-596页

作者： ZHANG Peilong SONG Xiping WANG Xiuli PEI Pei LUO Guiping tu jiangping CHEN Guoliang State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 000China Whole Win(Beijing) Materials Sci.& Tech.Co. Ltd.Beijing 100083China Department of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China

In order to improve the cycling stability of AB5 type alloy electrodes,rapid quenching technology and new alloy composition design were employed.A hydrogen storage alloy with nominal composition La0.6Ce0.4Ni3.6Co0.65Mn0.4Al0.2Ti0.05（FeB）0.1 was prepared by vacuum magnetic levitation melting under high purity argon atmosphere,followed by rapid quenching at different cooling *** results show that all alloys exhibit the single-phase CaCu5-type *** tests indicate that rapid quenching can slightly improve the cycling life of the ***,the high-rate dischargeability of the quenched alloys is lower than that of the as-cast alloy.

关键词： hydrogen storage alloys electrochemical properties rapid quenching microstructure

Doping Effects on Electronic Conductivity and Electrochemical Performance of LiFePO_4

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Journal of Materials Science & Technology 2009年第3期25卷 405-409页

作者： Jiezi Hu Jian Xie Xinbing Zhao Hongming Yu Xin Zhou Gaoshao Cao jiangping tu State Key Laboratory of Silicon Materials Department of Materials Science and Engineering Zhejiang University Hangzhou 310027 China Department of Chemistry Mie University 1577 Kurimamachiyacho Tsu Mie 514-8507 Japan

Olivine-structured pure LIFePO4 and doped LI（M, Fe）PO4 （M=La, Ce, Nd, Mn, Co, Ni） have been synthesized by a solvothermal method. X-ray diffraction and field emission scanning electron microscopy analyses indicate that the as-prepared LiFePO4 is well-crystallized nanopowders without any detectable impurity phases. The electronic conductivity of LiFePO4 is enhanced by around 1-3 orders by doping. It was found that doping alone is not sufficient for the high-rate performance of LiFePO4 and surface coating with such as carbon should be needed. The best dopant for LiFePO4 is Nd among those studied in the present work. Accordingly, doping with 1 mol fraction Nd leads to an increase in 70 mAh/g at 0.1 C for the hydrothermally synthesized sample and 50 mAh/g at 1.0 C after carbon-coating in comparison with the undoped samples.

关键词： Lithium iron phosphate Doping Conductivity Hydrothermal synthesis

A facile path from fast synthesis of Li-argyrodite conductor to dry forming ultrathin electrolyte membrane for high-energy-density allsolid-state lithium batteries

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Journal of Energy Chemistry 2022年第11期31卷 309-316,I0008页

作者： Zhao Jiang Hongling Peng Jingru Li Yu Liu Yu Zhong Changdong Gu Xiuli Wang Xinhui Xia jiangping tu State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Provinceand School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina CCTEG Chongqing Research Institute Chongqing 400039China

All-solid-state lithium batteries(ASSLBs),utilizing sulfide solid electrolyte,are considered as the promising design on account of their superior safety and high energy density,whereas the time-consuming preparation process of sulfide electrolyte powders and the thickness of electrolyte layer hinder their practical ***,an innovative ultimate-energy mechanical alloying plus rapid thermal processing approach is employed to rapidly synthesize the crystalline Argyrodite-type conductor Li_(5.3)PS_(4.3)ClBr_(0.7)(LPSCIBr)with superior ionic conductivity(11.7 mS cm^(-1)).Furthermore,to realize the higher energy density of the battery,an ultrathin LPSCIBr sulfide electrolyte membrane with superior ionic conductivity of 6.5 mS cm^(-1)is fabricated with the aid of polytetrafluoroethylene(PTFE)binder and the reinforced cellulose ***,a simple solid electrolyte interphase(SEI)is constructed on the surface of lithium metal to enhance anodic *** from the joint efforts of these merits,the modified ASSLBs with a high cell-level energy density of 311 Wh kg^(-1) show an excellent cyclic *** assembled all-solid-state Li_(2) S/Li pouch cell can operate even under the severe conditions of bending and cutting,demonstrating the enormous potential of the sulfide electrolyte membrane for ASSLBs application.

关键词： Sulfide electrolyte Thermal processing Ultrathin membrane Ionic conductivity All-solid-state lithium battery