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Amorphous Sb/C composite with isotropic expansion property as an ultra-stable and high-rate anode for lithium-ion batteries

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Rare Metals 2024年第5期43卷 2039-2052页

作者： Ze-Zhou Yang Cheng-Yi Zhang yu-qing ou Zhi-Kang Su Yan Zhao Heng-Jiang Cong Xin-Ping Ai Jiang-Feng Qian Hubei Key Laboratory of Electrochemical Power Sources College of Chemistry and Molecular SciencesWuhan UniversityWuhan430072China Institute of Technological Sciences Wuhan UniversityWuhan 430072China

Antimony(Sb)is an intriguing anode material for Li-ion batteries(LIBs)owing to its high theoretical capacity of 660 m Ah·g^(-1)and appropriate working potential of~0.8 V(***^(+)/Li).However,just like all alloying materials,the Sb anode suffers from huge volume expansion(230%)during repeated insertion/extraction of Li+ions,resulting in structural deterioration and rapid capacity *** this work,a novel amorphous Sb/C composite with atomically dispersed Sb particles in carbon matrix is prepared via a straightforward high-energy ball milling *** intimate intermixing of amorphous Sb with C provides homogeneous element distribution and isotropic volume expansion during cycling,resulting in persistent structural ***,the disordered structure of amorphous material shortens the diffusion distance of lithium ions/electrons,promoting fast reaction kinetics and rate *** from the aforementioned effects,the amorphous Sb/C exhibits a high reversible capacity of537.4 m Ah·g^(-1)at 0.1 A·g^(-1)and retains 201.0 m Ah·g^(-1)at an ultrahigh current rate of 10.0 A·g^(-1).Even after 1500deep cycles at 2.0 A·g^(-1),the amorphous Sb/C electrode still maintains 86.3%of its initial capacity,which outperforms all existing Sb-based anodes reported so *** analysis further reveals a greatly reduced volume variation of merely 34.6%for the amorphous Sb/C electrode,much lower than that of 223.1%for crystalline Sb *** study presents a new approach to stabilizing Sb-based alloy anodes and contributes to the construction of high-performance amorphous anode materials for LIBs,enabling advanced energy storage.

关键词： Amorphous Sb/C anode Homogeneous element distribution Isotropic volume expansion Ultra-long cycle stability High-rate capability Lithium-ion battery

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The Microwave-assisted Preparation and X-Ray Structure of 3-Bromocarbazole-N-Acetic Acid

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Chinese Chemical Letters 2001年第4期12卷 321-324页

作者： Wen Jian LAO yu Hua ZHANG yue Qi LIU Qiang Jin WU Zi Xiang HUANG qing yu ou Lanzhou Institute of Chemical Physics Chinese Academy of SciencesLanzhou 730000 Fujian Institute of Research on the Structure of Matter Chinese Academy of SciencesFuzhou 350002

The rapid synthesis of 3-bromocarbarole-N-acetic acid was performed using microwave irradiation. Under the optimal conditions the yield was 85.6% . The crystal structure showed that the carboxylic groups form bifurcated hydrogen bonds and the hydroxyl oxygen atoms serve as proton donors and also acceptor. Each carboxylic group was involved in four hydrogen bonds. The package of crystal was dominated by links of these hydrogen bonds.

关键词： Microwave-assisted synthesis 3-bromocarbazole-N-acetic acid X-ray determination bifurcated hydrogen bonds.

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C_(19)-DITERPENOID ALKALOIDS OF DELPHINIUM MOLLIPILUM

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Chinese Chemical Letters 1995年第2期6卷 101-102页

作者： Suo Ming ZHANG qing yu ou(Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000) Chinese Acad Sci Lanzhou Inst Chem Phys Lanzhou 730000 Peoples R China

Five C19-diterpenoid alkaloids were isolated from the aerial parts of Delphinium mollipilum ***. Four proved to be the known talitine B,talitine A, browniine and delcosine, while the fifth was a new C19-diterpenoid al...

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HPLC of Amino Acids and Oligopeptides by Pre-Column Fluorescence Derivatization with 9-Acridine Formyl Chloride

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Chinese Chemical Letters 1997年第10期8卷 875-878页

作者： Jin Mao You Xin Jun FAN qing yu ou(Lanzhou Institute of Chemical Physics. Chinese Academy of Sciences 730000) Lanzhou Inst. of Chemical Physics Chinese Academy of Sciences 730000 China

A highly sensitive HPLC method for the detection of amino acids and oligopeptides with 9-acridine formyl chloride by pre-column fluorescence derivatization has been developed. Glycine, glycylglycine, histidine, triglycine and glutathione were separated on a reversed-phase C-18 column with methanol-water-triethylamine eluent, derivatization and chromatographic conditions were optimized. The five derivatives were eluted in 28 min with a good reproducibility. Linear range of the calibration graph was 0.08-260 nmol/ml(-1). The relative standard deviations(n=6) are < 5%. Detection limits (signal-to-noise ratio=3) for the five derivatives are 20-40 fmol.

关键词： HPLC of Amino Acids and Oligopeptides by Pre-Column Fluorescence Derivatization with 9-Acridine Formyl Chloride

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Liquid Chromatography Detertmination of Amino Acids by Pre-Column Fluorescence Derivatization with Acridone-N-acetyl Chloride

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Chinese Chemical Letters 1998年第7期9卷 657-660页

作者： Jin Mao You Xin Jun FAN qing yu ou qing Cun ZHU (Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences 730000)(Department of Chemistry, Qufu Normal University, Qufu, Shandong 273165) Lanzhou Inst. of Chemical Physics Chinese Academy of Sciences 730000 China Department of Chemistry Qufu Normal University Qufu Shandong 273165 China

A sensitive liquid chromatographic mcthod for the detection of andno acids with precolumn fluorescence derivatization with acridone-N-acetyl chloride has been developed. Andno acid derivatives were eluted in 4o ndn with good reproducibility. The reIative standard deviations (n=6) at an analytical concentration of 50 pmol are < 4%. The method described is also suitable for the analysis of andno acids in different biological samples.

关键词： Liquid chromatography, Acridone-N-acetyl Chloride Amino acids, Derivatization

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HPLC Determination of Amino Acids by Pre-Column Fluorescence Derivatization with Carbazole-9-yl-Acetyl Chloride

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Chinese Chemical Letters 1998年第3期9卷 281-285页

作者： Jin Mao You Xing Jun FAN qing yu ou qing Cun ZHU(Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences 730000)(Department of Chemistry, Qufu Normal University, Qufu, Shandong 273165) Lanzhou Inst. of Chemical Physics Chinese Academy of Sciences Shandong 730000 China

A sensitive HPLC method for the detection of amino acids with pre-column fluorescence derivatization with carbazole-9-yl-acetyl chloride has been developed. This method, in conjunction with a multi-gradient program, offers baseline resolution of the common CRAC-amino acids from a linear acetonitrile gradient. Separation of amino acid derivatives was obtained on a reversed-phase C-18 column. Derivatization and chromatographic conditions were optimized. Amino acid derivatives were eluted in 40 min with good reproducibility. The relative standard deviations (n=6) at an analytical concentration of 100 pmol are < 4%. The methods described are also suitable for the analysis of amino acids in different biological samples.

关键词： liquid chromatography amino acids fluorescence derivatization carbazole-9-yl-acetyl chloride

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Entangled photons enabled ultrafast stimulated Raman spectroscopy for molecular dynamics

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Light(Science & Applications) 2024年第8期13卷 1615-1622页

作者： Jiahao Joel Fan Zhe-yu ou Zhedong Zhang Department of Physics City University of Hong KongKowloonHong Kong SARChina City University of Hong Kong Shenzhen Research InstituteShenzhenGuangdongChina

Quantum entanglement has emerged as a great resource for studying the interactions between molecules and *** propose a new scheme of stimulated Raman scattering with entangled photons.A quantum ultrafast Raman spectroscopy is developed for condensed-phase molecules,to monitor the exciton populations and *** results are obtained,showing an entanglement-enabled time-frequency scale not attainable by classical *** Raman signal presents an unprecedented selectivity of molecular correlation functions,as a result of the Hong-ou-Mandel *** work suggests a new paradigm of using an unconventional interferometer as part of spectroscopy,with the potential to unveil advanced information about complex materials.

关键词： materials. spectroscopy selectivity

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TWO NEW C_(19)-DITERPENE ALKALOIDS FROM DELPHINIUM SWINANENSE VAR LEPTOPOGON

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Chinese Chemical Letters 1994年第9期5卷 755-756页

作者： Suo Hing ZHANG qing yu ou Wei Le yu(Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000)

An investigation of the alkaloids of Delphinium swinanense var. leptopogon resulted in the isolation and identification of two new C(19)-diterpene alkaloids named swinanine A and B, together with one known tatsiensine... 详细信息

关键词： VAR DITERPENE ALKALOIDS FROM DELPHINIUM SWINANENSE VAR LEPTOPOGON TWO NEW C

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Side-Channel Leakage Analysis of Inner Product Masking

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Computers, Materials & Continua 2024年第4期79卷 1245-1262页

作者： yuyuan Li Lang Li yu ou College of Computer Science and Technology Hengyang Normal UniversityHengyang421002China Hunan Provincial Key Laboratory of Intelligent Information Processing and Application Hengyang Normal UniversityHengyang421002China

The Inner Product Masking(IPM)scheme has been shown to provide higher theoretical security guarantees than the BooleanMasking(BM).This scheme aims to increase the algebraic complexity of the coding to achieve a higher level of *** previous work unfolds when certain(adversarial and implementation)conditions are met,and we seek to complement these investigations by understanding what happens when these conditions deviate from their expected *** this paper,we investigate the security characteristics of IPM under different *** adversarial condition,the security properties of first-order IPMs obtained through parametric characterization are preserved in the face of univariate and bivariate *** implementation condition,we construct two new polynomial leakage functions to observe the nonlinear leakage of the IPM and connect the security order amplification to the nonlinear *** observe that the security of IPMis affected by the degree and the linear component in the leakage *** addition,the comparison experiments from the coefficients,signal-to-noise ratio(SNR)and the public parameter show that the security properties of the IPM are highly implementation-dependent.

关键词： Side-channel analysis inner product masking mutual information nonlinear leakage

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SWINANINE　C＆D，TWO　NEW　DITERPENE　ALKALOIDS　FROM　DELPHINIUM　SWINANENSE　VAR　LEPTOPOGON

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Chinese Chemical Letters 1995年第4期6卷 309-310页

作者： Suo Hing ZHANG Ji HA qing yu ou (Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou730000)a: (Department of Biology, Lanzhou University, Lanzhou 730000) Chinese Acad Sci Lanzhou Inst Chem Phys Lanzhou 730000 Peoples R China Lanzhou Univ Dept Biol Lanzhou 730000 Peoples R China

s: Two new diterpene alkaloids named swinanine C and D were isolated from Delphinium swinanense var leptopogon (H. -M. ) W. T. Wang. Their structures were elucidated by means of spectral methods , principally 1H-NHR, ... 详细信息

关键词： VAR LEPTOPOGON SWINANENSE FROM DITERPENE ALKALOIDS DELPHINIUM

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