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Constructing Abnormal Step-Scheme Nano-Heterointerfaces as Sulfur Electrocatalysts with Desirable Electron Confinement for Practical Li-S Battery

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Renewables 2024年第1期2卷 61-72页

作者： Dan Luo Hedong Chen Guihua Liu yihang nie Tingzhou Yang Qianyi Ma Xiaoyong Lai Jingde Li Yi Cui Xin Wang Yongguang Zhang Zhongwei Chen Department of Chemical Engineering Waterloo Institute for NanotechnologyUniversity of WaterlooWaterlooOntario N2L 3G1 State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023 Power Battery and Systems Research Center Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023 School of Electronics and Information Engineering South China Normal UniversityFoshan 528225 School of Chemical Engineering and Technology Hebei University of TechnologyTianjin 300130 South China Academy of Advanced Optoelectronics&International Academy of Optoelectronics at Zhaoqing South China Normal UniversityGuangdong 510006 State Key Laboratory of High-Efficiency Coal Utilization and Green Chemical Engineering Ningxia UniversityYinchuan 750021 Vacuum Interconnected Nanotech Workstation(Nano-X) Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhouJiangsu 215123

Heterostructured sulfur electrocatalysts have long been heralded as an effective approach to settle the issues of the shuttle effect and sluggish reaction kinetics of lithium polysulfides(LiPSs)in lithium-sulfur(Li-S)***,the limited active sites on the interface of the heterostructure offer unsatisfactory LiPSs conversion capability,rendering sluggish reaction ***,we have designed abnormal step-scheme nano-heterointerfaces,containing P-N,N-semimetal,and P-semimetal heterostructures as sulfur electrocatalysts to regulate the LiPSs catalytic conversion behavior,which demonstrates efficient catalytic activity and robust structural *** excellent electron-confinement contributed by the step-scheme barrier endows the electron gathering at the nano-heterointerfaces,conferring high selectivity and durability of electrocatalyst for an accelerated sulfur reduction *** unique robust structure design further bestows the sulfur composite with favored ion/mass transportation within the *** to these structural features,the Li-S cell delivers excellent performance under high areal capacity over 7 mAh cm^(−2) and lean electrolyte/sulfur ratio below 2.5μL mg^(−1),decent rate capability up to 8 C,remarkable cyclic stability over 500 cycles,and satisfactory energy density of 386.3 Wh kg^(−1) in a 7.5 Ah pouch *** nano-heterointerface structure design strategy endows a sulfur cathode with superior LiPSs catalytic activity,opening new insights into high-performance Li-S batteries.

关键词： lithium-sulfur batteries lithium polysulfides nano-heterointerface sulfur reduction reaction catalytic active sites

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量子点输运系统中电子的等待时间分布

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山西大学学报(自然科学版) 2018年第4期41卷 727-733页

作者：王敏张超聂一行山西大学理论物理研究所

基于散射理论和紧束缚模型研究了单能级量子点连接两个导线时电子的等待时间分布,讨论了偏压、通道数、温度对等待时间分布的影响。当量子点能级与电极费米面对齐时,等待时间分布不依赖于偏压。当量子点能级偏离了费米面时,分布函数的... 详细信息

基于散射理论和紧束缚模型研究了单能级量子点连接两个导线时电子的等待时间分布,讨论了偏压、通道数、温度对等待时间分布的影响。当量子点能级与电极费米面对齐时,等待时间分布不依赖于偏压。当量子点能级偏离了费米面时,分布函数的峰值随着偏压增加而增加,等待时间分布向短时方向移动。对于双通道量子点系统,零等待时间时等待时间分布不为零,而且随着量子点能级偏离费米面,零等待时间时等待时间分布概率降低。随着左导线所加温度降低等待时间分布的极大值向长时间方向移动,而且最大分布概率略有降低,但温度的影响主要是在最大分布概率附近,对长时概率分布影响较小。

关键词：量子点等待时间分布散射理论

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门电压诱导的单分子磁体磁滞效应

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山西大学学报(自然科学版) 2017年第2期40卷 305-310页

作者：刘亚文张超聂一行山西大学理论物理研究所

基于率方程研究了温差驱动的单分子磁体中,门电压诱导的磁滞效应。当门电压从某一负值缓慢地增加到某一正值再从该正值返回到负值时,分子磁体磁化强度对门电压的响应曲线不重合,而是一条闭合磁滞回线。这种磁滞效应是分子磁体的宏观量... 详细信息

基于率方程研究了温差驱动的单分子磁体中,门电压诱导的磁滞效应。当门电压从某一负值缓慢地增加到某一正值再从该正值返回到负值时,分子磁体磁化强度对门电压的响应曲线不重合,而是一条闭合磁滞回线。这种磁滞效应是分子磁体的宏观量子效应,只出现在低温下,可以从分子态占据概率对门电压的依赖来解释。此外,还讨论了温度、铁磁电极极化率以及交换作用对磁滞回线所围面积的影响。

关键词：单分子磁体率方程磁滞回线

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双量子点系统单态三重态传输诱导的散粒噪声

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山西大学学报(自然科学版) 2014年第2期37卷 210-216页

作者：张燕薛海斌聂一行山西大学理论物理研究所太原理工大学物理与光电工程学院

基于有效粒子数分辨的量子主方程和全计数统计,研究了耦合双量子点系统电子输运性质,讨论了源极和漏极的极化程度、电子在量子点中的自旋交换作用对平均电流、散粒噪声的影响,给出了平均电流和散粒噪声在不同的交换耦合下随电极极化率... 详细信息

基于有效粒子数分辨的量子主方程和全计数统计,研究了耦合双量子点系统电子输运性质,讨论了源极和漏极的极化程度、电子在量子点中的自旋交换作用对平均电流、散粒噪声的影响,给出了平均电流和散粒噪声在不同的交换耦合下随电极极化率的变化特征,分析了自旋单态和三重态在电子输运过程中对平均电流和散粒噪声的贡献,并借助于自旋阻塞引起的聚束效应解释了超泊松散粒噪声的形成。

关键词：全计数统计量子点散粒噪声

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多孔介质中固体体积分数与颗粒尺度对流体绝对渗透率的影响

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山西大学学报(自然科学版) 2017年第1期40卷 92-99页

作者：乔太斌杨玉双李如如白娟娟聂一行山西大学理论物理研究所澳大利亚联邦科学与工业研究组织山西大学物理电子工程学院

多孔介质渗透率是影响流体流动的重要因素,对多孔介质渗透率的研究在油气开采、地下水文学等工程技术领域具有实际的应用价值。本文通过在立方体空间中随机填充球形固体颗粒生成不同固体体积分数和颗粒半径的三维多孔介质数值模型。利... 详细信息

多孔介质渗透率是影响流体流动的重要因素,对多孔介质渗透率的研究在油气开采、地下水文学等工程技术领域具有实际的应用价值。本文通过在立方体空间中随机填充球形固体颗粒生成不同固体体积分数和颗粒半径的三维多孔介质数值模型。利用格子玻尔兹曼法模拟流体在这些模型中的流动并计算得到不同固体体积分数和颗粒半径下多孔介质模型的渗透率,分析了多孔介质中固体颗粒半径和体积分数对渗透率的影响,并通过数据拟合得到了渗透率关于固体颗粒半径和体积分数的函数关系。通过与二维多孔介质中渗透率关于孔隙率和固体颗粒粒径的函数关系对比,发现在三维多孔介质中,渗透率与固体体积分数和粒径之间具有与二维情况下类似的幂律指数关系。

关键词：多孔介质渗透率格子玻尔兹曼法

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Effect of poly(4-tert-butylstyrene)block length on the microphase structure of poly(ethylene oxide)-b-poly(4-vinylbenzyl chloride)-b-poly(4-tert-butylstyrene)triblock terpolymers

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Chinese Chemical Letters 2023年第6期34卷 551-555页

作者： Kun An Jia Gao yihang Chen Jingjing nie Yongjin Li Junting Xu Binyang Du State Key Laboratory of Motor Vehicle Biofuel Technology Department of Polymer Science&EngineeringZhejiang UniversityHangzhou 310027China College of Material Chemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou 310036China Department of Chemistry Zhejiang UniversityHangzhou 310027China

A series of linear poly(ethylene oxide)-b-poly(4-vinylbenzyl chloride)-b-poly(4-tert-butylstyrene)(PEO_(113)-b-PVBC_(130)-b-Pt BS_(x)or E_(113)V_(130)T_(x))triblock terpolymers with various lengths x(=20,33,66,104,215)of Pt BS block were synthesized via a two-step reversible addition-fragmentation chain transfer(RAFT)*** E_(113)V_(130)T_(x)triblock terpolymers were non-crystalline because the PVBC and Pt BS blocks strongly hindered the crystallization of PEO *** effects of Pt BS block length x on the phase structures of E_(113)V_(130)T_(x)triblock terpolymers were investigated by combined techniques of small-angle X-ray scattering(SAXS)and transmission electron microscopy(TEM).It was found that with increasing x from20 to 215,the phase structure of E_(113)V_(130)T_(x)triblock terpolymers became more ordered and changed from disordered structure,hexagonally-packed cylinder(HEX),hexagonally perforated layer(HPL),to lamellar(LAM)phase ***-variable SAXS measurements showed that the HEX,HPL and LAM phase structures obtained for E_(113)V_(130)T_(66),E_(113)V_(130)T_(104)and E_(113)V_(130)T_(215)by thermal annealing,respectively,were thermodynamically stable in the temperature range of 30-170℃.

关键词： ABC triblock terpolymer Phase structure SAXS HPL Thermodynamically stable

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Bornyl acetate extracted from Sharen(Fructus Amomi)inhibits proliferation,invasion and induces apoptosis by suppressing phosphatidylinositol-3-kinase/protein kinase B signaling in colorectal cancer

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Journal of Traditional Chinese Medicine 2023年第6期43卷 1081-1091页

作者： LI Xiaohua DUAN Zhihang YUE Jianjun ZHANG Yongyu LI yihang LIU Shifang nie Qu YANG Depo ZHANG Lixia School of Traditional Dai-Thai Medicine West Yunnan University of Apllied ScienceJinghong 666100China Institute of Medicinal Plant Development Chinese Academy of Medical SciencesJinghong 666100China Yunnan Branch Institute of Medicinal Plant DevelopmentChinese Academy of Medical SciencesYunnan Key Laboratory of Southern Medicine UtilizationJinghong 666100China

OBJECTIVE:To investigate the antitumor effects of bornyl acetate(BA)isolated from Sharen(Fructus Amomi)in colorectal cancer(CRC)and the underlying ***:SW480 and HT29 cells were treated with increasing doses of BA in order to determine its antitumor effects in *** viability,colony formation,cell cycle,and apoptosis as well as migration and invasion were assessed using various *** addition,the in vivo antitumor effects of BA were assessed using a xenograft mouse *** then assessed the mechanism of action of BA by conducting pathway activator-mediated rescue experiments and assessed the protein levels by Western blot ***:BA showed anti-CRC tumor activities in vitro by suppressing cell proliferation and colony formation,inducing apoptosis,blocking cell cycle,and inhibiting migration and *** effects were mediated via suppression of the phosphatidylinositol-3-kinase/protein kinase B(PI3K/AKT)*** the tumor xenograft experiment,BA was found to repress tumor growth in vivo with low ***:The results demonstrated that BA exerts antitumor effects by suppressing the PI3K/AKT pathway,with low ***,BA might be a potential novel therapeutic agent for CRC.

关键词： bornyl acetate colorectal neoplasms phosphatidylinositol 3-kinase protein kinases B signal transduction

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High-performance Ta-doped Li_(7)La_(3)Zr_(2)O_(12) garnet oxides with AlN additive

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Journal of Advanced Ceramics 2022年第10期11卷 1530-1541页

作者： Chang ZHANG Xiangchen HU Zhiwei nie Cong WU Nan ZHENG Shaojie CHEN yihang YANG Ran WEI Jiameng YU Nan YANG Yi YU Wei LIU School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Shanghai Key Laboratory of High-resolution Electron Microscopy ShanghaiTech UniversityShanghai 201210China

Garnet-type oxide is one of the most promising solid-state electrolytes(SSEs)for solid-state lithium-metal batteries(SSLMBs).However,the Li dendrite formation in garnet oxides obstructs the further development of the SSLMBs ***,we report a high-performance garnet oxide by using AlN as a sintering additive and Li as an anode interface *** with high thermal conductivity can promote the sintering activity of the garnet oxides,resulting in larger particle size and higher relative ***,Li3N with high ionic conductivity formed at grain boundaries and interface can also improve Li-ion transport *** a result,the garnet oxide electrolytes with AlN show enhanced thermal conductivity,improved ionic conductivity,reduced electronic conductivity,and increased critical current density(CCD),compared with the counterpart using Al_(2)O_(3) sintering *** addition,Li symmetric cells and Li|LiFePO_(4)(Li|LFP)half cells using the garnet electrolyte with the AlN additive exhibit good electrochemical *** work provides a simple and effective strategy for high-performance SSEs.

关键词： solid-state lithium-metal battery(SSLMB) garnet oxide thermal conductivity electronic conductivity critical current density(CCD)

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Gold-vapor-assisted chemical vapor deposition of aligned monolayer WSe2 with large domain size and fast growth rate

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Nano Research 2020年第10期13卷 2625-2631页

作者： Mingrui Chen Anyi Zhang yihang Liu Dingzhou Cui Zhen Li Yu-Han Chung Sai Praneetha Mutyala Matthew Mecklenburg Xiao nie Chi Xu Fanqi Wu Qingzhou Liu Chongwu Zhou Mork Family Department of Chemical Engineering and Materials Science Ming Hsieh Department of Electrical EngineeringCore Center of Excellence in Nano Imaging and Department of Physics and AstronomyUniversity of Southern CaliforniaLos AngelesCA 90089USA

Orientation-controlled growth of two-dimensional(2D)transition metal dichalcogenides(TMDCs)may enable many new electronic and optical ***,previous studies reporting aligned growth of WSe2 usually yielded very small domain ***,we introduced gold vapor into the chemical vapor deposition(CVD)process as a catalyst to assist the growth of WSe2 and successfully achieved highly aligned monolayer WSe2 triangular flakes grown on c-plane sapphire with large domain sizes(130μm)and fast growth rate(4.3μm·s^−1).When the aligned WSe2 domains merged together,a continuous monolayer WSe2 was formed with good *** transferring to Si/SiO2 substrates,field effect transistors were fabricated on the continuous monolayer WSe2,and an average mobility of 12 cm^2·V^−1·s−1 was achieved,demonstrating the good quality of the *** report paves the way to study the effect of catalytic metal vapor in the CVD process of TMDCs and contributes a novel approach to realize the growth of aligned TMDC flakes.

关键词： two-dimensional materials transition metal dichalcogenides tungsten diselenide(WSe2) chemical vapor deposition aligned growth

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Effect of resonant magnetic perturbation on boundary plasma turbulence and transport on J-TEXT tokamak

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Plasma Science and Technology 2019年第12期21卷 13-19页

作者： Ting WU Lin nie Min XU Jie YANG Zhipeng CHEN Yuejiang SHI Nengchao WANG Da LI Rui KE Yi YU Shaobo GONG Ting LONG yihang CHEN Bing LIU J-TEXT Team Southwestern Institute of Physics Chengdu 610041People's Republic of China International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People's Republic of China Department of Nuclear Engineering Seoul National UniversitySeoul 08826Republic of Korea School of Physics University of Science and Technology of ChinaHefei 230026People's Republic of China Institute of Fusion Science School of Physical Science and TechnologySouthwest Jiaotong UniversityChengdu 610031People's Republic of China

The effect of resonant magnetic perturbation(RMP) on boundary turbulence and transport in J-TEXT plasma is experimentally *** plasma fluctuations in discharges with and without the(m/n=3/1) RMP currents are diagnosed by using Langmuir probe *** was found that fluctuations in the edge and scrape-off layer(SOL) regions decrease with the application of a 6 kA *** broadband turbulence at the radial location of ρ~0.9 which has a characteristic frequency of 40-150 kHz was strongly suppressed when applying RMP,as was the radial turbulent particle flux and blob transport in the near-SOL *** experimental findings make RMP a promising method of suppressing and controlling turbulence and particle transport in a plasma boundary.

关键词： RMP turbulent transport blob

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