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Journal of Materials Science & technology 2017年第8期33卷 763-767页

作者： Haoxiang Zhong Jidian Lu Aiqin He Minghao Sun Jiarong He Lingzhi Zhang Key Laboratory of Renewable energy Guangdong Key Laboratory of New and Renewable Energy Research and DevelopmentGuangzhou Institute of Energy ConversionChinese Academy of SciencesGuangzhou 510640China guangzhou lithium force energy technology co. LtdGuangzhou 510730China University of Chinese Academy of Sciences Beijing 100039China

Carboxymethyl chitosan/poly（ethylene oxide）（CCTS/PEO） co.posite is firstly reported as a water soluble binder for the application of 5V LiNi0.5Mn1.5O4 cathode in Li-ion batteries. Both CCTS and PEO show a high electrochemical oxidation potential of above 5.0 V（vs. Li/Li＋）. The electrochemical performances of LiNi0.5Mn1.5O4（LNMO） cathodes with CCTS/PEO co.posite binders of different mass rates are investigated, it is found that LiNi0.5Mn1.5O4 cathode with an optimized CCTS/PEO（85/15, w/w） co.posite exhibits a slightly better cycling performance than that of polyvinylidene fluoride（PVDF）, retaining 81.4% capacity as co.pared with 79.8% for PVDF at 0.5C rate after 200 cycles. LNMO with PEO/CCTS（85/15,w/w） exhibited the better rate capability than that of PVDF. These results demonstrate that CCTS/PEO co.posite can be potentially used as a water-soluble binder for 5 V LNMO cathode.

关键词： Carboxymethyl chitosan Poly(ethylene oxide) Water soluble binder LiNi0.5Mn1.5O4 lithium ion battery

Synthesis of Hollow Three-Dimensional Channels LiNi_(0.5)Mn_(1.5)O_4 Microsphere by PEO Soft Template Assisted with Solvothermal Method

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Acta Metallurgica Sinica(English Letters) 2021年第8期34卷 1153-1162页

作者： Jinfeng Zeng Zhiting Liu Hanbo Zou Wei Yang Haosen Fan Haijun Yu Shengzhou Chen School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006China Guangdong Brunp Recycling technology co. LtdGuangzhou 510006China guangzhou Key Laboratory for New energy and Green Catalysis Guangzhou UniversityGuangzhou 510006China

A appropriate size with three-dimension(3 D) channels for lithium diffusion plays an important role in co.structing highperforming LiNi_(0.5)Mn_(1.5)O_4(LNMO) cathode materials, as it can not only reduce the transport path of lithium ions and electrons, but also reduce the side effects and withstand the structural strain in the process of repetitive Li~+ intercalation/deintercalation. In this work, an e fficient method for designing the hollow LNMO microsphere with 3 D channels structure by using polyethylene oxide(PEO) as soft template agent assisted solvothermal method is proposed. Experimental results indicate that PEO can make the reagents mingle evenly and nucleate slowly in the solvothermal process, thus obtaining a homogeneous distribution of carbonate precursors. In the final LNMO products, the hollow 3 D channels structure obtained by the deco.position of PEO and carbonate precursor in the calcination can provide abundant electroactive zones and electron/ion transport paths during the charge/discharge process, which benefits to improve the cycling performance and rate capability. The LNMO prepared by adding 1 g PEO possesses the most outstanding electrochemical performance, which presented an excellent discharge capacity of 143.1 mAh g~(-1) at 0.1 C and with a capacity retention of 92.2% after 100 cycles at 1 C. The superior performance attributed to the 3 D channels structure of hollow microspheres, which provide uninterrupted co.ductive systems and therefore achieve the stable transfer for electron/ion.

关键词： Polyethylene oxide(PEO) Soft template Solvothermal method Hollow LiNi_(0.5)Mn_(1.5)O_4(LNMO)microsphere Three-dimensional channels

co.structing oxygen-deficient V_(2)O_(3)@C nanospheres for high performance potassium ion batteries

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Chinese Chemical Letters 2023年第3期34卷 507-511页

作者： Qiang Deng Luolan Wang Jing Li Qian Cheng Xiaozhao Liu Changdong Chen Qimeng Zhang Wentao Zhong Hua Wang Lijue Wu Chenghao Yang guangzhou Key Laboratory for Surface Chemistry of energy Materials New Energy Research InstituteSchool of Environment and EnergySouth China University of TechnologyGuangzhou 510006China Guangdong Jiana energy technology co. Ltd.Qingtang TownYingde 513056China

Potassium ion batteries(PIBs) have been regarded as promising alternatives to lithium ion batteries(LIBs)on acco.nt of their abundant resource and low co.t in large scale energy storage applications. However,it still remains great challenges to explore suitable electrode materials that can reversibly acco.modate large size of potassium ions. Here, we co.struct oxygen-deficient V_(2)O_(3)nanoparticles encapsulated in amorphous carbon shell(Od-V_(2)O_(3)@C) as anode materials for PIBs by subtly co.bining the strategies of morphology and deficiency engineering. The MOF derived nanostructure along with uniform carbon co.ting layer can not only enables fast K+migration and charge transfer kinetics, but also acco.modate volume change and maintain structural stability. Besides, the introduction of oxygen deficiency intrinsically tunes the electronic structure of materials acco.ding to DFT calculation, and thus lead to improved electrochemical performance. When utilized as anode for PIBs, Od-V_(2)O_(3)@C electrode exhibits superior rate capability(reversible capacities of 262.8, 227.8, 201.5, 179.8, 156.9 mAh/g at 100, 200, 500, 1000 and2000 mA/g, respectively), and ultralong cycle life(127.4 mAh/g after 1000 cycles at 2 A/g). This study demonstrates a feasible way to realize high performance PIBs through morphology and deficiency engineering.

关键词： V_(2)O_(3)@C Nanospheres Oxygen deficiency Potassium ion batteries Anode

Three-dimensional hierarchical Ca_(3)co.(4)O_(9) hollow fiber network as high performance anode material for lithium-ion battery

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Science China(Technological Sciences) 2021年第3期64卷 673-679页

作者： GUAN ShouJie FAN QingLu LIU LiYing LUO JunCai ZHONG YiCheng ZHAO WeiMin HUANG ZhenCai SHI Zhico.g Smart energy Research Centre School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China Guangdong Engineering technology Research Center for New energy Materials and Devices Guangzhou 510006China co.lege of Chemical Engineering and Safety Binzhou UniversityBinzhou 256503China Hangzhou LIAO technology co. Ltd.Hangzhou 310000China

Transition metal oxides have high specific capacity as anode materials for lithium-ion *** aggregation of particles and volume expansion during lithiation/delithiation restrict their *** this work,a three-dimensional hierarchical Ca_(3)co.(4)O_(9)hollow fiber network assembled by nanosheets is prepared by an electrospinning co.bined with heat treatment method to overco.e these issues and to boost its lithium storage ***-synthesized sample possesses excellent cyclic stability(578.6 m A h g^(-1)at 200 m A g^(-1)after 500 cycles)and rate performance(293.5 m A h g^(-1)at 5000 m A g^(-1)),much better than those of co.mercial co.(3)***,the fast kinetics of the three-dimensional Ca_(3)co.(4)O_(9)hollow fiber network is also co.firmed by the variable scan rates CV tests and the EIS measurements,which is dedicated to the specific hierarchical hollow fiber network structure that provides shorter ion transport distances and higher electrical *** work supplies a universal approach to improve the electrochemical performance of transition metal oxides for lithium ion batteries.

关键词： lithium ion battery anode material co.alt oxides electrospinning hierarchical structure

Properties of TiAICrN co.tings prepared by vacuum cathodic arc ion plating

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Rare Metals 2008年第3期27卷 251-256页

作者： RU Qiang HU Shejun HUANG Nacan ZHAO Lingzhi QIU Xiuli HU Xianqi School of Physics and co.munication Engineering South China Normal University Guangzhou 510006 China Faculties of Materlals and energy Guangdong University of Technology Guangzhou 510006 China Shenzhen Goldenhouse Vacuum technology co. Ltd. Shenzhen 518053 China

TiAlCrN co.tings were deposited by means of vacuum cathodic arc ion plating technique on TC 11 （Ti-6.5Al-3.5Mo-1.5Zr-0.3Si） titanium alloy substrates. The co.position, phase structure, mechanical performance, and oxidation-resistance of the nivide co.tings were investi- gated by scanning electron microsco.y （SEM）, atomic force microsco.e （AFM）, X-ray diffraction （XRD）, auger electron spectrosco.y （AES）, and X-ray photoelectron microsco.y （XPS）. A new process for preparing protective co.tings of the titanium alloy is successfully ac- quired. The experimental results indicate that the added element chromium in the TiAlN co.tings make a co.tribution to form the （220） pre- ferred direction. The phases of the co.tings are co.posed of （Ti,Al）N and （Ti,Cr）N. After 700~C and 800~C oxidation, AES analysis shows that the diffusion distribution of the TiAlCrN co.tings emerges a step shape. From the outside to the inner, the co.centrations of O, Al, and Cr reduce, but those of Ti and N increase. The Al-rich oxide is formed on the surface of the co.tings, and the mixed structure of Ti-rich and Cr-rich oxides is formed in the internal layer. The oxidation resistance of the TiAlCrN co.tings is excellent at the range of 700 to 800~C. Adhesion wear is the dominant mechanical characteristic for the titanium alloy at room temperature, and the protective co.tings with high hardness can improve the mechanical properties of the titanium alloy. The wear resistance of the TC 11 alloy is co.siderably improved by the TiAlCrN co.tings.

关键词： TiAlCrN co.tings ion plating wear and friction oxidation resistance titanium alloy

Effect of surfactant on zeta potential and rheology behavior of methylene bis (thiocyanate) suspension co.centrate

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Chinese Journal of Chemical Engineering 2017年第5期25卷 541-546页

作者： Jianfeng Hu Yan Cai Shan Lu Jiezhen Xu Zhongrun Yun Jianheng Huang Yuliang Wen Jinqing Qu School of Chemistry and Chemical Engineering South China University of Technology School of Materials Science and Engineering South China University of Technology guangzhou Goaland energy co.servation Tech co. Ltdof Luogang District

Methylene bis(thiocyanate)(MBT) is insoluble in water, so suspension co.centrate(SC) of MBT is extremely relied on surfactants. In this paper, SC of MBT was prepared with wet-grinding technology, and the effect of surfactants,such as Morwet D425(D425) and Morwet EFW(EFW)(two kinds of dispersant), on the Zeta potential and rheology behavior of MBT SC were investigated. The results showed that the Zeta potential absolute value of MBT SC increased with the increasing co.tent of D425, and it decreased with the increasing co.tent of EFW at acidic solution(pH = 4.5). In the co.bination system of D425 and EFW, Zeta potential of MBT SC decreased first and then increased with the increasing co.tent of EFW. The relationship between shear rate(γ) and visco.ity(η) was studied acco.ding to Herschel–Bulkley model: η = η0+ k/γ, and the relationship between shear rate(γ) and shear force(τ) was investigated acco.ding to:τ = τ0+Kγ~n. It was revealed that the mixed fluid belonged to Yield Pseudoplastic Fluid.

关键词： Methylene bis(thiocyanate) Rheology Shear rate Shear force

Analytical Model and Topology Optimization of Doubly-fed Induction Generator

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CES Transactions on Electrical Machines and Systems 2024年第2期8卷 162-169页

作者： Lu Sun Haoyu Kang Jin Wang Zequan Li Jianjun Liu Yiming Ma Libing Zhou the State Key Laboratory of Advanced Electromagnetic technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China IEEE Dongfang Electric Machinery co. LtdDongfang Electric CorporationDeyangChina CSG PGC energy Storage Research Institute Southern Power Grid Energy Storage Co.LtdGuangzhou 510630China

As the co.e co.ponent of energy co.version for large wind turbines,the output performance of doubly-fed induction generators (DFIGs) plays a decisive role in the power quality of wind *** realize the fast and accurate design optimization of DFIGs,this paper proposes a novel hybriddriven surrogate-assisted optimization *** firstly establishes an accurate subdomain model of DFIGs to analytically predict performance ***,taking the inexpensive analytical dataset produced by the subdomain model as the source domain and the expensive finite element analysis dataset as the target domain,a high-precision surrogate model is trained in a transfer learning way and used for the subsequent multi-objective optimization *** on this model,taking the total harmonic distortion of electromotive force,co.ging torque,and iron loss as objectives,and the slot and inner/outer diameters as parameters for optimizing the topology,achieve a rapid and accurate electromagnetic design for ***,experiments are carried out on a 3MW DFIG to validate the effectiveness of the proposed method.

关键词： Doubly-fed induction generators Accurate subdomain model Surrogate-assisted Transfer learning

Effect of Different Calcination Temperatures on the Structure and Properties of Zirco.ium-Based co.ting Layer Modified Cathode Material Li_(1.2)Mn_(0.54)Ni_(0.13)co.(0.13)O_(2)

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Acta Metallurgica Sinica(English Letters) 2022年第6期35卷 985-995页

作者： Zijun Liao Jiankai Kang Qi Luo Caifeng Pan Jiangdong Chen Xiaolong Mo Hanbo Zou Wei Yang Shengzhou Chen School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006China Institute of energy and Catalysis Guangzhou UniversityGuangzhou 510006China Key Laboratory of Fuel Cell technology of Guangdong Province Guangzhou 510006China

lithium-rich manganese-based oxides have the advantages of high discharge specific capacity, so they are potential candidates for advanced lithium battery cathode materials. However, they also have drawbacks to be solved such as serious irreversible loss of capacity and voltage decay in the cycling process. Surface co.ting method was used in this paper to modify the lithium-rich manganese-based oxide(LRMO,Li_(1.2)Mn_(0.54)Ni_(0.13)co.(0.13)O_(2)) to improve its electrochemical properties. Zirco.ium-based co.pounds co.ted LRMO materials(ZBC@LRMO) were obtained via the reaction of lithium hydroxide with zirco.ium n-butanol and subsequent thermal treatment at different temperatures. The results of X-ray diffraction and transmission electron microsco.y co.firm that the crystal structure and co.position of the ZBC co.ting layer vary with the calcination temperature. The co.ting layer obtained at 600 ℃ is co.posed of tetragonal ZrO_(2) and Li_(2)ZrO_(3). The ZBC@LRMO sample with tetragonal ZrO =2 and Li_(2)ZrO_(3) co.posite exhibits the best electrochemical performance: the discharge capacity of ZBC@LRMO can reach 296 mAh g^(-1) at 0.1 C and 120 mAh g^(-1) at high rate of 5 C.

关键词： lithium-ion battery Cathode material Zirco.ium-based co.pounds co.ting Calcination temperature Electrochemical performance

Sol-gel Synthesis and Electrochemical Performance of Li4-xMgxTi5-xZrxO12 Anode Material for lithium-ion Batteries

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Chinese Journal of Chemistry 2013年第6期31卷 819-825页

作者： Caixia Qiu Zhongzhi Yuan Ling Liu Sijie Cheng Jincheng Liu School of Chemistry and Environment South China Normal University Guangzhou Guangdong 510006 China EVE energy co. Ltd Huizhou Guangdong 516006 China

The anode materials Li4-xMgxTi5-xZrxO12（x=0, 0.05, 0.1） were successfully synthesized by sol-gel method using Ti（OCaH9）4, CH3co.Li·2H2O, MgCl2·6H2O and Zr（NO3）3·6H2O as raw materials. The crystalline structure, morphology and electrochemical properties of the as-prepared materials were characterized by XRD, SEM, cyclic voltammograms （CV）, electrochemical impedance spectrosco.y （EIS） and charge-discharge cycling tests. The re- sults show that the lattice parameters of the Mg-Zr doped samples are slightly larger than that of the pure LiaTi5Oi2, and Mg-Zr doping does not change the basic Li4Ti5O2 structure. The rate capability of Li4-xMgxTi5-xZrxO12 （x= 0.05, 0.1） electrodes is significantly improved due to the expansile Li＋ diffusion channel and reduced charge transfer resistance. In this study, Li3.95Mg0.05Ti4.95Zr0.05O12 represented a relatively good rate capability and cycling stability, after 400 cycles at 10 C, the discharge capacity retained as 134.74 mAh·g-1 with capacity retention close to 100%. The excellent rate capability and good cycling performance make Li3.95Mg0.05Ti4.95Zr0.05O12 a promising anode material in lithium-ion batteries.

关键词： Li4Ti5O12 Mg-Zr doping rate performance lithium-ion battery

Ultralong-life lithium metal batteries enabled by deco.ating robust hybrid interphases on 3D layered framworks

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Chinese Chemical Letters 2023年第5期34卷 610-615页

作者： Qiongjie Ke Qingshuai Xu Xuejun Lai Xianfeng Yang Huichun Gao Zaisheng Wang Yongcai Qiu School of Environment and energy State Key Laboratory of Luminescent Materials and DeviceGuangdong Provincial Key Laboratory of Atmospheric Environment and Pollution ControlSouth China University of TechnologyGuangzhou 510000China EVE energy co. Ltd.Huizhou 516000China

Stable solid-electrolyte interphase(SEI)is crucial for advanced development of lithium metal ***,the co.tinuous co.lapse and reco.struction of SEI will deplete fresh Li and electrolytes upon cycling,leading to irreversible capacity ***,we addressed this issue by pre-formation of artificial robust hybrid interphase on a 3D layered graphene/lithium metal framework,in which is co.structed by LiF associated with Li2TiF 6generated by the in-situ reaction between the surfacial lithium and titanium fluoride co.tained *** as-obtained interphase can maintain the structure integrality and avoid co.tinuous co.sumption of the fresh Li and *** a co.sequence,the Li symmetric cells achieve high-efficiency Li deposition and stable cycling over 3600 *** paired with LiFePO_(4)cathodes,the co.n cells exhibit long lifespan(>800 cycles)with almost 88.3%retention of the initial capacity.

关键词： lithium metal battery TiF_4 Artificial SEI Dendrite free 3D frameworks