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International Journal of Minerals,Metallurgy and Materials 2023年第6期30卷 1171-1180页

作者： Shuqing Nie Yu Xin qiuyun wang Chengjin Liu Chang Miao Limin Yu Wei Xiao College of Chemistry and Environmental Engineering Yangtze UniversityJingzhou 434023China

Tin-based materials are very attractive anodes because of their high theoretical capacity,but their rapid capacity fading from volume expansions limits their practical applications during alloying and dealloying ***,the improved binder-free tin-copper intermetallic/carbon nanotubes(Cu6Sn5/CNTs)alloy thin-film electrodes are directly fabricated through efficient in situ electrodeposition from the leaching solution of treated waste-printed circuit boards(WPCBs).The characterization results show that the easily agglomerated Cu6Sn5 alloy nanoparticles are uniformly dispersed across the three-dimensional network when the CNTs concentration in the electrodeposition solution is maintained at 0.2 g·L−***,the optimal Cu6Sn5/CNTs-0.2 alloy thin-film electrode can not only provide a decent discharge specific capacity of 458.35 mAh·g^(−1)after 50 cycles at 100 mA·g^(−1)within capacity retention of 82.58%but also deliver a relatively high reversible specific capacity of 518.24,445.52,418.18,345.33,and 278.05 mAh·g^(−1)at step-increased current density of 0.1,0.2,0.5,1.0,and 2.0 A·g^(−1),***,the preparation process of the Cu6Sn5/CNTs-0.2 alloy thin-film electrode with improved electrochemical performance may provide a cost-effective strategy for the resource utilization of WPCBs to fabricate anode materials for lithium-ion batteries.

关键词： tin-copper intermetallic in situ electrodeposition carbon nanotubes anode material lithium-ion battery

Recent progress about transmission electron microscopy characterizations on lithium-ion batteries

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Journal of Energy Chemistry 2024年第8期95卷 39-56,I0002页

作者： Yihang Liu qiuyun Li Ziqiang wang Institute of Materials Research Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518000GuangdongChina

With the rapid development of portable electronics,new energy vehicles,and smart grids,ion batteries are becoming one of the most widely used energy storage devices,while the safety concern of ion batteries has always been an urgent problem to be *** develop a safety-guaranteed battery,the characterization of the internal structure is indispensable,where electron microscopy plays a crucial *** on this,this paper summarizes the application of transmission electron microscopy(TEM)in battery safety,further concludes and analyzes the aspects of dendrite growth and solid electrolyte interface(SEI)formation that affect the safety of ion batteries,and emphasizes the importance of electron microscopy in battery safety research and the potential of these techniques to promote the future development of this *** advanced electron microscopy techniques and their prospects are also discussed.

关键词： Electron microscopy characterizations Lithium-ion batteries Dendrites SEI

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复合橡胶沥青的性能影响因素分析

黑龙江交通科技 2024年第8期47卷 1-4,9页

作者：谭由容王秋云孙建禹重庆交院和瑞工程检测技术有限公司重庆402247 重庆交通职业学院重庆402247

为进一步推进公路建设绿色发展,缓解废旧轮胎带来的环境压力,促进废旧轮胎胶粉改性沥青的推广应用,梳理了废胶粉改性沥青及其沥青混合料的相关研究成果,以橡胶粉、活化剂、芳烃油等多种材料,以不同的制备工艺和改变胶粉、改性剂掺量制... 详细信息

为进一步推进公路建设绿色发展,缓解废旧轮胎带来的环境压力,促进废旧轮胎胶粉改性沥青的推广应用,梳理了废胶粉改性沥青及其沥青混合料的相关研究成果,以橡胶粉、活化剂、芳烃油等多种材料,以不同的制备工艺和改变胶粉、改性剂掺量制备得到复合橡胶沥青,并进行了相关的沥青性能试验。通过不同发育时间的橡胶沥青性能,本着性能要求和节约能源的角度,确定了发育时间为0.5 h;活化剂掺量越多,对性能的影响越大,为了保证一定的延展性和弹性恢复率,建议活化剂掺量为0.7%;不同胶粉掺量对橡胶沥青的性能存在一定程度的影响,对比不同的指标,推荐胶粉掺量为18%。为了增加橡胶粉与基质沥青的相容性,可以适当地添加芳烃油,试验表明:芳烃油的添加可促进胶粉与沥青相容,降低黏度,有利于橡胶沥青混合料的制备。

关键词：路面铺装沥青改性橡胶沥青制备工艺

达格列净对2型糖尿病患者心外膜脂肪组织体积的影响

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皖南医学院学报 2024年第3期43卷 220-223页

作者：孔祥王秋云张翠微华强王勇王德国皖南医学院第一附属医院弋矶山医院内分泌科安徽芜湖241001 皖南医学院第一附属医院弋矶山医院老年医学科安徽芜湖241001

目的:观察达格列净(DAP)对2型糖尿病(T2DM)患者心外膜脂肪组织(EAT)体积的影响,并分析EAT体积与血清白细胞介素6(IL-6)和脂联素(ADPN)水平的相关性。方法:测定32例未应用DAP治疗(对照组)和30例应用DAP治疗(DAP治疗组)的T2DM患者的EAT体... 详细信息

目的:观察达格列净(DAP)对2型糖尿病(T2DM)患者心外膜脂肪组织(EAT)体积的影响,并分析EAT体积与血清白细胞介素6(IL-6)和脂联素(ADPN)水平的相关性。方法:测定32例未应用DAP治疗(对照组)和30例应用DAP治疗(DAP治疗组)的T2DM患者的EAT体积,收集两组患者的临床资料并检测血清IL-6和ADPN水平,采用Pearson相关分析EAT体积与IL-6和ADPN水平之间的相关性。结果:与对照组相比,DAP治疗组T2DM患者的EAT体积降低(P<0.01),血清IL-6水平降低(P<0.001),而ADPN水平升高(P<0.001)。EAT体积与T2DM患者血清IL-6含量呈正相关(r=0.509,P<0.01),与血清ADPN含量呈负相关(r=-0.432,P<0.01)。结论:DAP治疗降低T2DM患者的EAT体积,有助于降低心血管事件的发生风险。

关键词： 2型糖尿病达格列净心外膜脂肪组织体积

Influence of target temperature on femtosecond laser-ablated brass plasma spectroscopy

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Plasma Science and Technology 2020年第7期22卷 4-10页

作者： Junfeng SHAO Jin GUO qiuyun wang Anmin CHEN Mingxing JIN Institute of Atomic and Molecular Physics Jilin UniversityChangchun 130012People's Republic of China Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy(Jilin University) Changchun 130012People’s Republic of China

Spectral intensity,electron temperature and density of laser-induced plasma(LIP) are important parameters for affecting sensitivity of laser-induced breakdown spectroscopy(LIBS).Increasing target temperature is an easy and feasible method to improve the *** this paper,a brass target in a temperature range from 25℃ to 200℃ was ablated to generate the LIP using femtosecond ***-resolved spectral emission of the femtosecond LIBS was measured under different target *** results showed that,compared with the experimental condition of 25℃,the spectral intensity of the femtosecond LIP was enhanced with more temperature *** addition,the electron temperature and density were calculated by Boltzmann equation and Stark broadening,indicating that the changes in the electron temperature and density of femtosecond LIP with the increase of the target temperature were different from each *** increasing the target temperature,the electron temperature increased while the electron density ***,in femtosecond LIBS,a hightemperature and low-density plasma with high emission can be generated by increasing the target *** increase in the target temperature can improve the resolution and sensitivity of femtosecond LIBS.

关键词： laser-induced breakdown spectroscopy time-resolved spectroscopy emission enhancement femtosecond laser target temperature

Influence of target temperature on AlO emission of femtosecond laser-induced Al plasmas

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Plasma Science and Technology 2021年第4期23卷 55-62页

作者： Wei QI qiuyun wang Junfeng SHAO Anmin CHEN Mingxing JIN Beijing Institute of Tracking and Telecommunications Technology Beijing 100094People’s Republic of China Institute of Atomic and Molecular Physics Jilin UniversityChangchun 130012People’s Republic of China State Key Laboratory of Laser Interaction With Matter&Innovation Laboratory of Electro-Optical Countermeasures Technology Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033People’s Republic of China

The influence of the target temperature on the molecular emission of femtosecond laser-induced breakdown spectroscopy(LIBS) was investigated experimentally. An Al target was ablated to produce laser-induced plasma. The Al target was uniformly heated to a maximum of 250℃. The measured molecular emission was AlO(△ν=0) from the femtosecond LIBS of the Al *** measurements indicated that the molecular emission of AlO increased as the temperature of the Al target increased. In addition, a two-temperature model was used to simulate the evolution of the electron and lattice temperature of the Al target with different initial temperatures. The simulated results showed that the electron and lattice temperatures of Al irradiated by the femtosecond laser increased as the initial temperature of the Al target increased;also, the simulated ablated depth increased. Therefore, an increase in the initial Al target temperature resulted in an enhancement in the spectral signal of AlO from the femtosecond LIBS of Al,which was directly related to the increase in the size of the ablated crater. The study suggested that increasing the temperature of the target improves the intensity of molecular emission in femtosecond LIBS.

关键词： laser-induced breakdown spectroscopy femtosecond laser sample temperature AlO

Effect of lens focusing distance on laser-induced silicon plasmas at different sample temperatures

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Plasma Science and Technology 2019年第3期21卷 69-76页

作者： Dan ZHANG Anmin CHEN qiuyun wang Ying wang Suyu LI Yuanfei JIANG Mingxing JIN Institute of Atomic and Molecular Physics Jilin University Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy (Jilin University)

We investigated the dependence of laser-induced breakdown spectral intensity on the focusing position of a lens at different sample temperatures(room temperature to 300 ℃) in atmosphere.A Q-switched Nd:YAG nanosecond pulsed laser with 1064 nm wavelength and 10 ns pulse width was used to ablate silicon to produce plasma. It was confirmed that the increase in the sample's initial temperature could improve spectral line intensity. In addition, when the distance from the target surface to the focal point increased, the intensity firstly rose, and then *** trend of change with distance was more obvious at higher sample temperatures. By observing the distribution of the normalized ratio of Si atomic spectral line intensity and Si ionic spectral line intensity as functions of distance and temperature, the maximum value of normalized ratio appeared at the longer distance as the initial temperature was higher, while the maximum ratio appeared at the shorter distance as the sample temperature was lower.

关键词： laser-induced breakdown spectroscopy initial sample temperature distance between focal point and target surface

Time-resolved spectroscopy of femtosecond laser-induced Cu plasma with spark discharge

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Plasma Science and Technology 2019年第6期21卷 140-146页

作者： qiuyun wang Anmin CHEN Wanpeng XU Dan ZHANG Ying wang Suyu LI Yuanfei JIANG Mingxing JIN Institute of Atomic and Molecular Physics Jilin University Changchun 130012 People's Republic of China Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy(Jilin University) Changchun 130012 People's Republic of China

The combination of spark discharge and laser-induced breakdown spectroscopy (LIBS) is called spark discharge assisted *** works under laser-plasma triggered spark discharge mode,and shows its ability to enhance spectral emission *** work uses a femtosecond laser as the light souuce,since femtosecond laser has many advantages in laser-induced plasma compared with nanosecond laser,meanwhile,the study on femtosecond LIBS with spark discharge is ***-resolved spectroscopy of spark discharge assisted femtosecond LIBS was investigated under different discharge voltages and laser *** results showed that the spectral intensity was significantly enhanced by using spark discharge compared with LIBS ***,the spectral emission intensity using spark discharge assisted LIBS increased with the increase in the laser *** addition,at low laser energy,there was an obvious delay on the discharge time compared with high laser energy,and the discharge time with positive voltage was different from that with negative voltage.

关键词： laser-induced breakdown spectroscopy femtosecond laser spark discharge emission enhancement

Time-resolved spectroscopy of collinear femtosecond and nanosecond dual-pulse laser-induced Cu plasmas

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Plasma Science and Technology 2021年第11期23卷 121-127页

作者： qiuyun wang Hongxia QI Xiangyu ZENG Anmin CHEN Xun GAO Mingxing JIN Institute of Atomic and Molecular Physics Jilin UniversityChangchun 130012People's Republic of China School of Science Changchun University of Science and TechnologyChangchun 130022People's Republic of China

In this paper,we investigate the time-resolved spectroscopy of collinear femtosecond(fs)and nanosecond(ns)dual-pulse(DP)laser-induced plasmas.A copper target was used as an experimental sample,and the fs laser was considered as the time zero reference *** interpulse delay between fs and ns laser beams was 3μ***,we compared the time-resolved peak intensities of Cu(I)lines from Cu plasmas induced by fs+ns and ns+fs DP lasers with collinear *** results showed that compared with the ns+fs DP,the fs+ns DP laser-induced Cu plasmas had stronger peak intensities and longer ***,we calculated time-resolved plasma temperatures using the Boltzmann plot with three spectral lines at Cu(I)510.55,515.32 and 521.82 *** addition,time-resolved electron densities were calculated based on Stark broadening with Cu(I)line at 521.82 *** was found that compared with ns+fs DP,the plasma temperatures and electron densities of the Cu plasmas induced by fs+ns DP laser were ***,we observed images of ablation craters under the two experimental conditions and found that the fs+ns DP laser-produced stronger ablation,which corresponded to stronger plasma emission.

关键词： laser-induced breakdown spectroscopy fs+ns and ns+fs dual-pulse time-resolved spectroscopy plasma temperature electron density

Enhancement of optical emission generated from femtosecond double-pulse laser-induced glass plasma at different sample temperatures in air

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Plasma Science and Technology 2019年第3期21卷 98-107页

作者： Ying wang Anmin CHEN qiuyun wang Dan ZHANG Laizhi SUI Suyu LI Yuanfei JIANG Mingxing JIN Institute of Atomic and Molecular Physics Jilin University Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy (Jilin University)

In double-pulse laser-induced breakdown spectroscopy(DP-LIBS), the collinear femtosecond double-pulse laser configuration is experimentally investigated with different initial sample temperatures using a Ti:sapphire laser. The glass sample is ablated to produce the plasma spectroscopy. During the experiment, the detected spectral lines include two Na(I) lines(589.0 nm and 589.6 nm) and one Ca(I) line at the wavelength of 585.7 nm. The emission lines are measured at room temperature(22 ℃) and three higher initial sample temperatures(T_s?=?100 ℃, 200 ℃, and 250 ℃). The inter-pulse delay time ranges from-250 ps to 250 *** inter-pulse delay time and the sample temperature strongly influence the spectral intensity,and the spectral intensity can be significantly enhanced by increasing the sample temperature and selecting the optimized inter-pulse time. For the same inter-pulse time of 0 ps(single-pulse LIBS), the enhancement ratio is approximately 2.5 at T_s?=?200 ℃ compared with that obtained at T_s?=?22 ℃. For the same inter-pulse time of 150 ps, the enhancement ratio can be up to 4 at T_s?=?200 ℃ compared with that obtained at T_s?=?22 ℃. The combined enhancement effects of the different initial sample temperatures and the double-pulse configuration in femtosecond LIBS are much stronger than that of the different initial sample temperatures or the double-pulse configuration only.

关键词： laser-induced breakdown spectroscopy femtosecond laser double pulse emission enhancement glass