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Chinese Journal of Structural Chemistry 2020年第8期39卷 1503-1508,1361页

作者： lai heng-Dong LIN Qi-Pu State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350007China

Under solvothermal conditions,two ribbon-shaped chalcogenidometalate coordination compounds(butyl-Sn)4S8M2(TEPA)2(M=Mn(1),Ni(2),TEPA=tetraethylenepentamine),have been synthesized and characterized by elemental analysis,energy dispersive X-ray,infrared/ultraviolet-visible spectroscopy,thermogravimetric analysis,single-crystal and powder X-ray *** 1 and 2 crystallize in the triclinic space group P1 with a=13.999(3),b=14.658(4),c=16.150(4)A,a=68.78(3)°,β=69.12(3)°,γ=72.07(3)°,V=2825.0(14)A3,Z=2,Mr=1448.28,μ=2.503 mm-1,F(000)=1444,GOOF=1.001,R=0.0629 and wR=0.1286 for 12855 observed reflections with I>2σ(I)for 1;and a=11.029(3),b=11.858(2),c=11.888(3)A,a=87.27(2)°,β=69.10(2)°,γ=83.63(2)°,V=1443.6(6)A^3,Z=1,Mr=1455.78,μ=2.660 mm^-1,F(000)=728,GOOF=1.017,R=0.0464 and wR=0.1185 for 9267 observed reflections with I>2σ(I)for 2,*** 1 and 2 are composed of linear hexamer{Sn4M2}(M=Mn for 1,and Ni for 2)with 8μ2-S2-bridges and 2 TEPA terminal *** the quite large inter-paramagnetic-cation spacing(dMn-S-Sn-S-Sn-S-Sn-S-Sn-S-Mn=13.485 A,dNi-S-Sn-S-Sn-S-Sn-S-Sn-S-Ni=14.078 A),two samples exhibit distinct ferromagnetic-like behaviors with the intradimer coupling constant(J)and Weiss(θ)values up to 6.8 cm^-1 and 8.5 K for 1 and 17.2 cm-1 and 21.1 K for 2 calculated from the temperature dependence of the magnetic susceptibility.

关键词： chalcogenidometalates organotin-sulfides linear complexes magnetic properties

Surface modification of LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2 with Cr_2O_3 for lithium ion batteries

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Rare Metals 2012年第2期31卷 140-144页

作者： Li, Xiaowei Lin, Yingbin Liin, Ying lai, heng Huang, Zhigao Physics Department Fujian Normal University Fuzhou 350007 China

Cr 2 O 3-coated LiNi 1/3 Co 1/3 Mn 1/3 O 2 cathode materials were synthesized by a novel method. The structure and electrochemical properties of prepared cathode materials were measured using X-ray diffraction (XRD), scanning electron microscopy (SEM), charge-discharge tests, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). The measured results indicate that surface coating with 1.0 wt% Cr 2 O 3 does not affect the LiNi 1/3 Co 1/3 Mn 1/3 O 2 crystal structure (α-NaFeO 2 ) of the cathode material compared to the pristine material, the surfaces of LiNi 1/3 Co 1/3 Mn 1/3 O 2 samples are covered with Cr 2 O 3 well, and the LiNi 1/3 Co 1/3 Mn 1/3 O 2 material coated with Cr 2 O 3 has better electrochemical performance under a high cutoff voltage of 4.5 V. Moreover, at room temperature, the initial discharging capacity of LiNi 1/3 Co 1/3 Mn 1/3 O 2 material coated with 1.0 wt.% Cr 2 O 3 at 0.5C reaches 169 mAh·g 1 and the capacity retention is 83.1% after 30 cycles, while that of the bare LiNi 1/3 Co 1/3 Mn 1/3 O 2 is only 160.8 mAh·g 1 and 72.5%. Finally, the coated samples are found to display the improved electrochemical performance, which is mainly attributed to the suppression of the charge-transfer resistance at the interface between the cathode and the electrolyte.

关键词： lithium ion batteries LiNi 1/3 Co 1/3 Mn 1/3 O 2 Cr 2 O 3 coating

Microstructure and magnetic properties of electrodeposited Gd-Co alloy films

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Rare Metals 2008年第6期27卷 586-590页

作者： lai heng LI Jiaxin ZHOU Weichao ZHUANG Bin WU Xiaoping HUANG Zhigao Shool of Physics and Optoelectronics Technology Fujian Normal University Fuzhou 350007 China Department of Chemistry Fuzhou University Fuzhou 350002 China

Gd-Co alloy films were synthesized by potentiostatic electrolysis on Cu substrates in urea-acetamide-NaBr-KBr melt at 353 K. The electroreduction of Co^2＋ and Gd^3＋ was investigated by cyclic voltammetry. The reduction of Co^2＋ is an irreversible process. Gd^3＋ cannot be reduced alone, but it can be inductively co-deposited with Co^2＋. Both the Gd content and microstructure of the prepared Gd-Co alloy films can be controlled by the deposited potential. The content of Gd was analyzed using an inductively coupled plasma emission spectrometer （ICPES）, and the microstructure was observed by scanning electron micrograph （SEM）. The films were crystallized by heat-treatment at 823 K for 30 s in Ar atmosphere, and then were investigated by XRD. The hysteresis loops of the Gd-Co alloy films were measured by a vibrating sample magnetometer （VSM）. The experimental results reveal that the deposited Gd-Co alloy films are amorphous, while the annealing causes the samples to change from amorphous to polycrystalline, thus enhancing their magnetocrystalline anisotropy and coercivity. Moreover, the magnetic properties of the Gd-Co alloy films depend strongly on the Gd content.

关键词： electrodeposited films Gd-Co alloys surface microstructure crystalline phase magnetic properties

Electrochemical properties of carbon-coated LiFePO_4 and LiFe_(0.98)Mn_(0.02)PO_4 cathode materials synthesized by solid-state reaction

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Rare Metals 2012年第2期31卷 145-149页

作者： Lin, Ying Zeng, Baozhi Lin, Yingbin Li, Xiaowei Zhao, Guiying Zhou, Ting lai, heng Huang, Zhigao Department of Physics Fujian Normal University Fuzhou 350007 China

Olivine structured LiFePO 4 /C (lithium iron phosphate) and Mn 2+ -doped LiFe 0.98 Mn 0.02 PO 4 /C powders were synthesized by the solid-state reaction. The effects of manganese partial substitution and different carbon content coating on the surface of LiFePO 4 were considered. The structures and electrochemical properties of the samples were measured by X-ray diffraction (XRD), cyclic voltammetry (CV), charge/discharge tests at different current densities, and electrochemical impedance spectroscopy (EIS). The electrochemical properties of LiFePO 4 cathodes with x wt.% carbon coating (x= 3, 7, 11, 15) at =0.2C, 2C (1C= 170 mAh·g 1 ) between 2.5 and 4.3 V were investigated. The measured results mean that the LiFePO 4 with 7 wt.% carbon coating shows the best rate performance. The discharge capacity of LiFe 0.98 Mn 0.02 PO 4 /C composite is found to be 165 mAh·g 1 at a discharge rate, = 0.2C, and 105 mAh·g 1 at =2C, respectively. After 10 cycles, the discharge capacity has rarely fallen, while that of the pristine LiFePO 4 /C cathode is 150 mAh·g 1 and 98 mAh·g 1 at =0.2 and 2C, respectively. Compared to the discharge capacities of both electrodes above, the evident improvement of the electrochemical performance is observed, which is ascribed to the enhancement of the electronic conductivity and diffusion kinetics by carbon coating and Mn 2+-substitution.

关键词： lithium ion batteries LiFePO 4 carbon coating Mn-doping

Synchronization in Gradient Networks

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Synchronization in Gradient Networks

Nano-crystalline FeOOH mixed with SWNT matrix as a superior anode material for lithium batteries

第三届全国复杂动态网络学术论坛

作者： Choy heng lai Department of Physics National University of Singapore117542 Singapore Beijing-Hong Kong-Singapore Joint Centre for Nonlinear ＆ Complex Systems（Singapore） National University of SingaporeKent Ridge119260 Singapore

＜正＞The contradiction between the fact that many empirical networks possess power-law degree distribution and the finding that networks of heterogeneous degree distribution are difficult to synchronize has been a paradox in the study of network synchronization. Surprisingly, we find that this paradox can be well solved when proper gradients are introduced to the network links, i.e. heterogeneous degree distribution is in favor of synchronization in gradient networks. We analyze the general properties of gradient networks and explore their performance in enhancing network sychronizability. Based on these understandings, we outline the basic principles for constructing efficient gradient networks and propose a specific coupling scheme for verification. A detail comparison between the proposed coupling scheme and the previous asymmetric coupling schemes is conducted, where the new scheme is distinguished by using less network information while achieve higher synchronizability. Moreover, under the framework of gradient network, the synchronizabil-ity improvement factors employed in former studies can be well unified and their functions in improving network synchronizability can be easily identified. The validity of the findings is verified by analytical estimates as well as directed simulations on coupled nonidentical oscillators. Our study therefore suggests that, in addition to the topology advantage, scale-free networks also manifest their dynamical advantage in network synchronization when proper gradients are considered.

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来源： cnki会议评论

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Journal of Energy Chemistry 2014年第4期23卷 513-518页

作者： Mingzhong Zou Weiwei Wen Jiaxin Li Yingbin Lin heng lai Zhigao Huang College of Physics and Energy Fujian Normal University State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of Sciences

Nano-crystalline FeOOH particles （5-10 nm） have been uniformly mixed with electric matrix of single-walled carbon nanotubes （SWNTs） for forming FeOOH/SWNT composite via a facile ultrasonication method. Directly using the FeOOH/SWNT composite （containing 15 wt% SWNTs） as anode material for lithium battery enhances kinetics of the Li＋ insertion/extraction processes, thereby effectively improving re- versible capacity and cycle performance, which delivers a high reversible capacity of 758 mAh.g-1 under a current density of 400 mA.g-1 even after 180 cycles, being comparable with previous reports in terms of electrochemical performance for FeOOH anode. The good electrochemical performance should be ascribed to the small particle size and nano-crystalline of FeOOH, as well as the good electronic conductivity of SWNT matrix.

关键词： FeOOH/SWNT composite electrochemical properties energy storage lithium batteries anode material

A/O-MBBR工艺处理生活污水性能及菌群结构

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中国环境科学 2022年第5期42卷 2120-2128页

作者：赖永恒刘敏四川大学建筑与环境学院四川成都610065

采用设计规模为100m^(3)/d的一体化缺/好氧-移动床生物膜反应器(A/O-MBBR)处理实际生活污水,通过265d的中试研究考察了该工艺在多因素扰动下的除碳和脱氮性能,并对不同运行阶段微生物群落结构的动态变化进行了研究.结果表明,一体化A/O-M... 详细信息

采用设计规模为100m^(3)/d的一体化缺/好氧-移动床生物膜反应器(A/O-MBBR)处理实际生活污水,通过265d的中试研究考察了该工艺在多因素扰动下的除碳和脱氮性能,并对不同运行阶段微生物群落结构的动态变化进行了研究.结果表明,一体化A/O-MBBR系统具有良好的COD去除效果和脱氮性能.当好氧池溶解氧(DO)浓度和进水碳氮比(COD/N)分别为2.5~3.5mg/L和(7.9±2.0)时,COD、NH_(4)^(+)-N和TN去除率分别达到(93.3±5.4)%、(99.1±0.6)%和(67.9±10.5)%.Proteobacteria、Bacteroidetes和Chloroflexi在不同运行时期均有较高的相对丰度,保证了有机物的高效去除.A/O-MBBR系统脱氮功能菌在运行初期主要分布于活性污泥中,且相对丰度较低.长期运行后,生物膜与活性污泥中均同时检出大量硝化菌和反硝化菌.其中,相对丰度最高的硝化菌为Nitrospira,主要分布于生物膜上(19.48%~28.05%).反硝化菌则以Thauera、Terrimonas和Dokdonella等为主.

关键词：一体化缺/好氧-移动床生物膜反应器(A/O-MBBR) 生活污水多因素扰动微生物群落结构特性

SnO_2 nanospheres among GO and SWNTs networks as anode for enhanced lithium storage performances

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Journal of Energy Chemistry 2016年第3期25卷 445-449页

作者： Weiwei Wen Mingzhong Zou Qian Feng Jiaxin Li heng lai Zhigao Huang College of Physics and Energy Fujian Normal University and Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences

Conducting supporters of purified single-walled carbon nanotubes（SWNTs） and graphene oxide（GO）were used to confine pomegranate-structured Sn O2 nanospheres for forming SnO-GO-SWNT *** anode material for lithium ion batteries（LIBs）, this composite exhibits a stable and large reversible capacity together with an excellent rate capability. In addition, an analysis of the AC impedance spectroscopy has been used to confirm the enhanced mechanism for LIB performance. The improved electrochemical performance should be ascribed greatly to the reinforced synergistic effects between GO and SWNT networks, and their enhanced contribution of the conductivity. These results indicate that this composite has potential for utilization in high-rate and durable LIBs.

关键词： Lithium batteries SnO_2-GO-SWNT anodes Electrochemical performance Energy storage

Simulation of Earthworks Based on EON,3DS Max and AutoCAD

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International Journal of Plant Engineering and Management 2014年第2期19卷 72-77页

作者： lai Bing-heng LI Chang-hua HOU Xiao-ting School of Information and Control Engineering Xi'an University of Architecture and Technology College of Science Xi'an University of Architecture and Technology

In view of the earthwork construction tions, and earthworks cannot be verified, using with long duration, heavy and complicated construction condivirtual reality technology to simulate the process of its construction. As a hydropower project for an example, the terrain model using AutoCAD and 3DS Max combination of building, equipment model in 3DS max using entity model building. In the transporting section, will be built in 3DS max key frame together with the model of import in the EON and set the parameters of the animation node; In digging scene, using multiple place nodes to control of the excavator digging operation ; Interaction part of the scene, using the built-in mouse node （Click Sensor） and keyboard nodes （Keyboard Sensor） implementation scenarios and user interaction. Research shows that through excellent virtual reality software EON to apply virtual reality technology in earthwork construction simulation stage, found possible quality problems and potential safety problems in engineering, through the simulation can be more perfect earthwork construction. Verified, earthwork construction of virtual real earthworks has certain guidance and reference value.

关键词： virtual reality eon studio 3DS Max earthwork

EFFECT OF PROMOTERS(La,K,V,Zn) ON THE PHASE COMPOSITION OF COPRECIPITATED Fe-Mn CATALYST

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Journal of Energy Chemistry 1995年第1期 86-90页

作者： YAN Shi-Run ZHOU Jing-lai LIN heng-ShengInstitute of Coal Chemistry,Academia Sinica Taiyuan,Shanxi 030001

By using Mossbauer Effect Spectroscopy ( MES ), effects of promoters (La, K, V, Zn ) on the phase composition of coprecipitated iron-manganese (Fe- Mn ) catalyst after calcination, reduction and FT synthesis have been... 详细信息

关键词： promoter effect phase composition Fe-Mn catalyst