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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

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) Chengdu Inst. of Organic Chemistry Academia Sinica Chengdu 610041 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

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) Chengdu Inst. of Organic Chemistry Chinese Academy of Sciences Chendu 610041 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.

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.

Determination the Hydrogen Stored in Carbon Nanotubes by NO Titration Method

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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

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

Facile Synthesis of Chiral Conjugated Polymer Based on BINOL Skeleton

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Chinese Chemical Letters 2000年第1期11卷 29-30页

作者： Chun E DONG Yong Gang ZHI zuo long yu Liang Fu ZHANG Albert. S. C. CHAN (Chengdu institute of organic chemistry Academ Sinica Chengdu 610041 Hong Kong Polytechnic University, HongKong) Chengdu Inst. of Organic Chemistry Academ Sinica Chengdu 610041 China Hong Kong Polytechnic University HongKong Hong Kong

A new type of chiral conjugated polymers 6a-d has been synthesized by the reaction of (R)-2,2'-dihydroxy-1,1'-binaphthyl-6,6'-dicarbaldehyde 5 with corresponding diamine in the presence of acetic acid.

关键词： chiral conjugated polymers synthesis BINOL

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基于内容图像检索的关键技术

唐山师范学院学报 2012年第5期34卷 47-49页

作者：左玉龙山东大学计算机科学与技术学院山东济南250100 临沂大学费县分校山东费县273400

基于内容的图像检索(CBIR)系统是目前国内外研究的一个热点问题,简要介绍了CBIR技术的发展历程以及主要的原理,重点论述了基于内容的图像检索的关键技术之一——图像像视觉特征的描述与提取。并且通过具体的例子讨论了图像检索性能评价... 详细信息

基于内容的图像检索(CBIR)系统是目前国内外研究的一个热点问题,简要介绍了CBIR技术的发展历程以及主要的原理,重点论述了基于内容的图像检索的关键技术之一——图像像视觉特征的描述与提取。并且通过具体的例子讨论了图像检索性能评价的准则。

关键词：基于内容图像检索视觉特征相关反馈检索性能