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Novel Gel-like Process for Synthesizing Submicron Li_aNi_(0.8)Co_(0.2)O_2 Powders Used in Lithium Ion Batteries

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Chinese Chemical Letters 2003年第7期14卷 755-758页

作者： Rong Zhong YUAN zuo long YU Mei Zhen QU Chengdu Institute of Organic Chemistry the Chinese Academy of SciencesChengdu 610041

A novel gel-like process has been developed for synthesizing LiaNi0.8Co0.2O2 powders, using citric acid as a chelating agent. This process improves the homogeneity of constituent cation and enhances their reactivity in the obtained precursor. The results of electrochemical test demonstrated that these materials exhibited excellent electrochemical properties. Its initial capacity reached 181.6 mAh/g and reversible efficiency at the first cycle is about 88.6%.

关键词： Lithium ion batteries cathode material LiaNi0.8Co0.2O2 gel-like process.

NO Decomposition on Rh Supported CNTs

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Chinese Chemical Letters 2001年第1期12卷 83-86页

作者： Shui Hua TANG Bao Chun LIU Qi LIANG Li Zhen GAO Liang Fu ZHANG zuo long YU Chengdu Institute of Organic Chemistry Chinese Academy of SciencesChengdu 610041

The decomposition of NO has been studied in a steady flow reactor on fresh carbon nanotubes (CNTs), purified CNTs, Rh/p-CNTs and Rh/gamma -Al2O3 between 573 K and 973 K. NO decomposition at 573 K was initially complete over a reduced surface. The amount of NO absorption increased at temperature below 773 K. 100% NO conversion and more than 100% N-2 activity was achieved at 973 K for 150 min on p-CNTs and f-CNTs.

关键词： NO decomposition NO absorption carbon nanotubes rhodium

Asymmetric Transfer Hydrogenation of Ketone Catalyzed by Novel Ru(Ⅱ)-Chiral Sulfonamide Complex

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Chinese Chemical Letters 2000年第5期11卷 383-384页

作者： Chun E DONG Jun long ZHANG Wei Zhong ZHENG zuo long YU Liang Fu ZHANG (Chengdu Institute of organic Chemistry Academ Sinica. Chengdu 610041) Chengdu Inst. Organ. Chem. Academ S. Chengdu 610041 China

Two new chiral Ru(Ⅱ)-sulfonamide complex have been used to catalyze the enantioselective transfer hydrogenation of prochiral ketones and the secondary alcohols are obtained with good to excellent optical yields.

关键词： Sulfonamide transfer hydrogenation.

Electrochemical Properties of Spinel LiMn_2O_(4-δ)F_δ for Cathode Materials of Secondary Lithium-ion Battery

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Chinese Chemical Letters 2000年第5期11卷 455-458页

作者： Zhao Yong CHEN Xing Quan LIU zuo long YU (Chengdu Institute of Organic Chemistry, The Chinese Academy of Sciences, Chendy 610041) Chinese Acad Sci Chengdu Inst Organ Chem Chengdu 610041 Peoples R China

The spinel LiMn_2O_(4-δ)Fδ cathode materials were synthesized by solid-state reaction, With calculated amounts of LiOH·H_2O, MnO_2(EMD). LiF. The results of electrochemical test demonstrated that these new materials exhibited excellent electrochemical *** initial capacity reached -115 mAb·g^(-1) and reversible efficiency is about 100%. After 60 cycles. its capacity was still around 110 mAh· g^(-1), with nearly 100% reversible efficiency,

关键词： Spinel LiMn_2O_(4-δ)Fδ cathode materials.

Growth of Carbon Nanotubes over Ni Nano-particles Prepared in Situ by Reduction of La_2NiO_4 Oxides

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Chinese Chemical Letters 2000年第6期11卷 559-560页

作者： Qi LIANG Qing LI Bo Lan ZHANG zuo long YU(Chengdu Institute of Organic Chemistry, Academia Sinica, Chengdu 610041) Acad Sinica Chengdu Inst Organ Chem Chengdu 610041 Peoples R China

A novel catalyst precursor, La2NiO4, was investigated to synthesize carbon nanotubes,obtained from catalytic disproportionation of CO. The morphology of carbon nanotubes has been examined by TEM (transmission electron micrograph) and SEM (scaning electron micrograph). It was observed that the Ni nano-particle size formed at different reducing temperatures was a key factor to the yield and diameter of carbon nanotubes.

关键词： Carbon nanotubes synthesis La_2NiO_4 precursor CO

A Self-Tuning Smith-Neuron Controller for Large Time-Delay System

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A Self-Tuning Smith-Neuron Controller for Large Time-Delay S...

Determination the Hydrogen Stored in Carbon Nanotubes by NO Titration Method

2005 International Conference on Neural Networks and Brain(ICNN&B’05)

作者： PAN Feng HAN Ru-cheng ZHI Ze-ying LIU Hong-bing zuo long Electronic College Taiyuan University of Science and Technology

ISBN: (纸本)0780394224

＜正＞A Smith Predictor（SP） neuron based controller for large time-delay system is proposed in this *** this combined method,the neuron is used to self-tune the PID controller so the optimal parameters can be obtained,and the SP is going to compensate the large time-delay that is generally associate with different *** scheme has been simulated on a plant *** results demonstrate that the controller has enhanced the response speed and robustness.

关键词： Control systems Delay effects Neurons Three-term control Process control Predictive models Shape control Delay systems Mathematical model Educational institutions

来源： cnki会议评论

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cnki会议

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Chinese Chemical Letters 2001年第11期12卷 1015-1018页

作者： Shui Hua TANG Li Zhen GAO Bao Chun LIU He LI Bo Lan ZHANG Liang Fu ZHANG zuo long YU Chengdu Institute of Organic Chemistry Chinese Academy of SciencesChengdu 61004 Institute of Chemical Engineering Materials CAEPMianyang 621900

A novel method was established to determine the H-2-storage capacity in carbon nanotubes. According to 2NO+2H(2) (or 4H) = N-2+2H(2)O reaction, the H-2-storage capacity in carbon nanotubes could be calculated. The H-2... 详细信息

关键词： NO titration hydrogen storage carbon nanotubes

Enhanced ionization of vibrational hot carbon disulfide molecules in strong femtosecond laser fields

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Chinese Physics B 2018年第6期27卷 257-261页

作者： Wan-long zuo Hang Lv Hong-Jing Liang Shi-Min Shan Ri Ma Bing Yan Hai-Feng Xu Institute of Atomic and Molecular Physics Jilin University Changchun 130012 China Anhui Provincial Key Laboratory of Optoelectric Materials Science and Technology Anhui Normal University Wuhu 241000 China

By using a heated molecular beam in combination with a time-of-flight mass spectrometer, we experimentally study the ionization of vibrational-hot carbon disulfide（CS2） molecules irradiated by a linearly polarized 800-nm 50-fs strong laser field. The ion yields are measured in a laser intensity range of 7.0 × 10^（12） W/cm^2–1.5 × 10^（14） W/cm^2 at different molecular temperatures of up to 1400 K. Enhanced ionization yield is observed for vibrationally excited CS2 *** results show that the enhancement decreases as the laser intensity increases, and exhibits non-monotonical dependence on the molecular temperature. According to the calculated potential energy curves of the neutral and ionic electronic states of CS2, as well as the theoretical models of molecular strong-field ionization available in the literature, we discuss the mechanism of the enhanced ionization of vibrational-hot molecules. It is indicated that the enhanced ionization could be attributed to both the reduced ionization potential with vibrational excitation and the Frank–Condon factors between the neutral and ionic electronic states. Our study paves the way to understanding the effect of nuclear motion on the strongfield ionization of molecules, which would give a further insight into theoretical and experimental investigations on the interaction of polyatomic molecules with strong laser fields.

关键词： strong field ionization vibrational excited time-of-flight-mass spectrum

A Study on Production of Carbon Nanotubes by CH_4 Decomposition over LaNiO_3,La_4Ni_3O_(10),La_3Ni_2O_7 and La_2NiO_4

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Chinese Chemical Letters 2001年第9期12卷 839-842页

作者： He LI Shui Hua TANG Bao Chun LIU Li Zhen GAO Bai Ling LIU Qi LIANG Bo Lan ZHANG zuo long YU Chengdu Institute of Organic Chemistry Chinese Academy of SciencesChengdu 610041

Carbon nanotubes (CNTs) of narrow size distribution can be abundantly produced in the catalytic decomposition of CH4 over pre-reduced LaNiO3, La4Ni3O10, La3Ni2O7 and La2NiO4. The CNTs obtained were characterized by means of transmission electron microscopy (TEM). Thermal oxidation of CNTs in air was monitored thermogravimetrically (TG). The results revealed that a lower La/Ni ratio of the catalysts would lead to a wider diameter distribution and a higher degree of graphitic nature.

关键词： Carbon nanotubes LaNiO3 La2NiO4 La3Ni2O7 La4Ni3O10 CH4