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Design of ZnSe-CoSe heterostructure decorated in hollow N-doped carbon nanocage with generous adsorption and catalysis sites for the reversibly fast kinetics of polysulfide conversion

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Journal of Energy Chemistry 2023年第11期86卷 135-145,I0004页

作者： Junan Feng Chuan Shi Hanghang Dong Chaoyue Zhang Wendong Liu Yu Liu Tianyi Wang xiaoxian zhao Shuangqiang Chen Jianjun Song College of Physics Qingdao UniversityQingdao 266071ShandongChina College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071ShandongChina Department of Chemical Engineering School of Environmental and Chemical EngineeringShanghai UniversityShanghai 200444China School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002JiangsuChina Department of Chemistry College of ScienceHebei Agricultural UniversityBaoding 071001HebeiChina

Although lithium-sulfur batteries(Li SBs)are regarded as one of the most promising candidates for the next-generation energy storage system,the actual industrial application is hindered by the sluggish solid–liquid phase conversion kinetics,severe shuttle effect,and low sulfur ***,a zeolitic imidazolate framework(ZIF)derived heterogeneous ZnSe-CoSe nanoparticles encapsulated in hollow N-doped carbon nanocage(ZnSe-CoSe-HNC)was designed by etching with tannic acid as a multifunctional electrocatalyst to boost the polysulfide conversion kinetics in *** hollow structure in ZIF ensures large inner voids for sulfur and buffering volume *** exposed ZnSe-CoSe heterogeneous interfaces serve as bifunctional adsorption-catalytic centers to accelerate the conversion kinetics and alleviate the shuttle *** with the highly conductive framework,the ZnSe-CoSeHNC/S cathode exhibits a high initial reversible capacity of 1305.3 m A h g-1at 0.2 C,high-rate capability,and reliable cycling stability under high sulfur loading and lean electrolyte(maintaining at 745 m A h g-1after 200 cycles with a high sulfur loading of 6.4 mg cm-2and a low electrolyte/sulfur ratio of 6μL mg^(-1)).Theoretical calculations have demonstrated the heterostructures of ZnSe-CoSe offer higher binding energy to lithium polysulfides than that of ZnSe or CoSe,facilitating the electron transfer to lithium *** work provides a novel heterostructure with superior catalytic ability and hollow conductive architecture,paving the way for the practical application of functional sulfur electrodes.

关键词： Lithium-sulfur batteries Heterostructure Conversion Kinetics Hollow structure Bi-directional catalysis

Design and Construction of 3D Porous Na3V2(PO4)3/C as High Performance Cathode for Sodium Ion Batteries

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Chemical Research in Chinese Universities 2021年第2期37卷 265-273页

作者： HoU Baoxiu MA Linlin ZANG Xiaohuan SHANG Ningzhao SONG Jianmin zhao xiaoxian WANG Chun QI Jian WANG Jiangyan YU Ranbo Department of Chemistry College of ScienceHebei Agricultural UniversityBaoding071001P.R.China Department of Physical Chemistry School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijing100083P.R.China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing100190P.R.China University of Chinese Academy of Sciences Beijing100049P.R.China

An easy and delicate approach using cheap carbon source as conductive materials to construct 3D sequential porous structural Na3V2(PO4)3/C(NVP/C)with high performance for cathode materials of sodium ion battery is highly *** this paper,the NVP/C with 3D sequential porous structure is constructed by a delicate approach named as“cooking porridge”including evaporation and calcination ***,during evaporation,the viscosity of NVP/C precursor is optimized by controlling the adding quantity of citric acid,thus leading to a 3D sequential porous structure with a high specific surface ***,the NVP/C with a 3D sequential porous structure enables the electrolyte to interior easily,providing more active sites for redox reaction and shortening the diffusion path of electron and sodium ***,benefited from its unique structure,as cathode material of sodium ion batteries,the 3D sequential porous structural NVP/C exhibits high specific capacities(115.7,88.9 and 74.4 mA·h/g at current rates of 1,20 and 50 C,respectively)and excellent cycling stability(107.5 and 80.4 mA·h/g are remained at a current density of 1 C after 500 cycles and at a current density of 20 C after 2200 cycles,respectively).

关键词： Porous structure Na3V2(PO4)3@C Sodium ion battery Cathode material Energy storage

Okra‑Like Multichannel TiO@NC Fibers Membrane with Spatial and Chemical Restriction on Shuttle‑Effect for Lithium–Sulfur Batteries

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Advanced Fiber Materials 2023年第1期5卷 252-265页

作者： Shuai Li Jingchong Liu Linlin Ma Li‑Juan Yu Lanlan Hou Dianming Li Songwei Gao Guichu Yue Zhimin Cui NüWang xiaoxian zhao Yong zhao Key Laboratory of Bio‑Inspired Smart Interfacial Science and Technology of Ministry of Education Beijing Key Laboratory of Bioinspired Energy Materials and DevicesSchool of ChemistryBeijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityBeijing 100191People’s Republic of China Beijing Key Laboratory for Bioengineering and Sensing Technology Daxing Research InstituteSchool of Chemistry and Biological EngineeringUniversity of Science and Technology BeijingBeijing 100083People’s Republic of China Department of Chemistry College of ScienceHebei Agricultural UniversityBaoding 071001People’s Republic of China Research School of Chemistry Australian National UniversityAustralian Capital TerritoryCanberra 2601Australia School of Materials Science and Engineering Lanzhou Jiaotong UniversityLanzhou 730070China

It is especially important to coordinately design the structure and composition of the host in lithium–sulfur batteries(LSBs)for improving its physicochemical adsorption and conversion of lithium polysulfide,which can alleviate the harmful shuttle ***,a self-supporting multichannel nitrogen-doped carbon fibers membrane embedded with TiO nanoparticles(TiO@NC)was constructed as the electrode for *** inner channels and the embedded TiO nanoparticles offer spatial confinement and chemical binding for polysulfides,***,the TiO nanoparticles have abundant oxygen vacancies that promote the conversion of *** addition,the nitrogen-doped carbon skeleton can not only serve as highly conductive transportation paths for electrons,but also integrate with the inner channels to sustain the morphology and bear volume expansion during cycling ***,the fabricated self-supporting quadruple-channel TiO@NC ultrathin fibers electrode exhibits a high initial specific capacity of 1342.8 mAh g^(-1)at 0.5 C and high-rate capability of 505.8 mAh g^(-1)at 4.0 *** addition,it maintains 696.0 mAh g^(-1)over 500 cycles with only 0.059%capacity decay per cycle at the high current density of 2.0 *** multichannel configuration combined with TiO nanoparticles provides a synergetic design strategy for fabricating high-performance electrodes in LSBs.

关键词： Multichannel Electrospinning Hierarchical structure Spatial confinement Chemical binding Lithium–sulfur battery

Synergy mechanism of defect engineering in MoS_(2)/FeS_(2)/C heterostructure for high-performance sodium-ion battery

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Journal of Energy Chemistry 2023年第7期82卷 268-276,I0006页

作者： Linlin Ma Xiaomei Zhou Jun Sun Pan Zhang Baoxiu Hou Shuaihua Zhang Ningzhao Shang Jianjun Song Hongjun Ye Hui Shao Yongfu Tang xiaoxian zhao Department of Chemistry College of ScienceHebei Agricultural UniversityBaoding 071001HebeiChina Hebei Key Laboratory of Applied Chemistry School of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004HebeiChina College of Chemistry Nankai UniversityTianjin 300071China Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004HebeiChina College of Physics Qingdao UniversityQingdao 266071HebeiChina CIRIMAT UniversitéPaul Sabatier31062 ToulouseFrance

MoS_(2) is a promising anode material in sodium-ion battery technologies for possessing high theoretical ***,the sluggish Na^(+) diffusion kinetics and low electronic conductivity hinder the ***,a unique MoS_(2)/FeS_(2)/C heterojunction with abundant defects and hollow structure(MFCHHS)was *** synergy of defect engineering in MoS_(2),FeS_(2),and the carbon layer of MFCHHS with a larger specific surface area provides multiple storage sites of Na^(+)corresponding to the surface-controlled *** MoS_(2)/FeS_(2)/C heterostructure and rich defects in MoS_(2) and carbon layer lower the Na^(+) diffusion energy ***,the construction of MoS_(2)/FeS_(2) heterojunction promotes electron transfer at the interface,accompanying with excellent conductivity of the carbon layer to facilitate reversible electrochemical *** abundant defects and mismatches at the interface of MoS_(2)/FeS_(2) and MoS_(2)/C heterojunctions could relieve lattice stress and volume change *** a result,the MFCHHS anode exhibits the high capacity of 613.1 mA h g^(-1)at 0.5 A g^(-1) and 306.1 mA h g^(-1) at 20 A g^(-1).The capacity retention of 85.0%after 1400 cycles at 5.0 A g^(-1) is *** density functional theory(DFT)calculation and in situ transmission electron microscope(TEM),Raman,ex-situ X-ray photon spectroscopy(XPS)studies confirm the low volume change during intercalation/deintercalation process and the efficient Na^(+)storage in the layered structure of MoS_(2) and carbon layer,as well as the defects and heterostructures in *** believe this work could provide an inspiration for constructing heterojunction with abundant defects to foster fast electron and Na^(+) diffusion kinetics,resulting in excellent rate capability and cycling stability.

关键词： Defect engineering Heterostructure Hollow structure Sodium-ion battery MoS_(2)/FeS_(2)

Fe_(3)O_(4)/Fe/FeS Tri-Heterojunction Node Spawning N-Carbon Nanotube Scaffold Structure for High-Performance Sodium-Ion Battery

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Energy & Environmental Materials 2024年第4期7卷 143-152页

作者： Yuan Liu Qing Lin Xiaocui Chen Xufeng Meng Baoxiu Hou Haiyan Liu Shuaihua Zhang Ningzhao Shang Zheng Wang Chaoyue Zhang Jianjun Song xiaoxian zhao Department of Chemistry College of ScienceHebei Agricultural UniversityBaoding 071001China College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071China College of Physics Qingdao UniversityQingdao 266071China

The Fe-based anode of sodium-ion batteries attracts much attention due to the abundant source,low-cost,and high specific ***,the low electron and ion transfer rate,poor structural stability,and shuttle effect of NaS_(2)intermediate restrain its further ***,the Fe_(3)O_(4)/Fe/FeS tri-heterojunction node spawned N-carbon nanotube scaffold structure(FHNCS)was designed using the modified MIL-88B(Fe)as a template followed by catalytic growth and sulfidation *** catalytic growth process,the reduced Fe monomers catalyze the growth of N-doped carbon nanotubes to connect the Fe_(3)O_(4)/Fe/FeS tri-heterojunction node,forming a 3D scaffold *** the N-doped carbon promotes the transfer of electrons between Fe_(3)O_(4)/Fe/FeS particles,and the tri-heterojunction facilitates the diffusion of electrons at the interface,to organize a 3D conductive *** unique scaffold structure provides more active sites and shortens the Na^(+)diffusion ***,the structure exhibits excellent mechanical stability to alleviate the volume expansion during ***,the Fe in Fe_(3)O_(4)/Fe heterojunction can adjust the dband center of Fe in Fe_(3)O_(4)to enhance the adsorption between Fe_(3)O_(4)and Na2S intermediate,which restrains the shuttle ***,the FHNCS demonstrates a high specific capacity of 436 mAh g^(-1)at 0.5 A g^(-1),84.7%and 73.4%of the initial capacities are maintained after 100 cycles at 0.5 A g^(-1)and 1000 cycles at 1.0 A g^(-1).We believe that this strategy gives an inspiration for constructing Fe-based anode with excellent rate capability and cycling stability.

关键词： anode core-shell heterojunction hollow structure sodium ion batteries

Ultrafine Fe/Fe3C decorated on Fe-N_(x)-C as bifunctional oxygen electrocatalysts for efficient Zn-air batteries

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Journal of Energy Chemistry 2021年第5期30卷 72-79页

作者： Lingbo Zong Xin Chen Siliang Liu Kaicai Fan Shuming Dou Jie Xu xiaoxian zhao Wenjun Zhang Yaowen Zhang Weicui Wu Fenghong Lu Lixiu Cui Xiaofei Jia Qi Zhang Yu Yang Jian zhao Xia Li Yida Deng Yanan Chen Lei Wang Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology Key Laboratory of Optic-electric Sensing and Analytical Chemistry fo r Life ScienceMOEState Key Laboratory of Eco-chemical EngineeringCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042ShandongChina School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin Key Laboratory of Composite and Functional MaterialsTianjin UniversityTianjin 300072China Centre for Clean Environment and Energy School of Environment and ScienceGriffith UniversityQueensland 4222Australia College of Science Hebei Agricultural UniversityBaoding 071001HebeiChina Key Laboratory of Rubber-Plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber-PlasticsQingdao University of Science and TechnologyQingdao 266042ShandongChina College of Materials Science and Engineering Qingdao University of Science&TechnologyQingdao 266042ShandongChina

Efficient bifunctional oxygen electrocatalysts for ORR and OER are fundamental to the development of high performance metal-air ***,a facile cost-efficient two-step pyrolysis strategy for the fabrication of a bifunctional oxygen electrocatalyst has been *** efficient non-preciousmetal-based electrocatalyst,Fe/Fe_(3)C@Fe-N_(x)-C consists of highly curved onion-like carbon shells that encapsulate Fe/Fe_(3)C nanoparticles,distributed on an extensively porous graphitic carbon *** obtained Fe/Fe_(3)C@Fe-N_(x)-C aerogel exhibited superb electrochemical activity,excellent durability,and high methanol *** experimental results indicated that the assembly of onion-like carbon shells with encapsulated Fe/Fe_(3)C yielded highly curved carbon surfaces with abundant Fe-Nxactive sites,a porous structure,and enhanced electrocatalytic activity towards ORR and OER,hence displaying promising potential for application as an air cathode in rechargeable Zn-air *** constructed Zn-air battery possessed an exceptional peak power density of~147 mW cm^(-2),outstanding cycling stability(200 cycles,1 h per cycle),and a small voltage gap of 0.87 *** study offers valuable insights regarding the construction of low-cost and highly active bifunctional oxygen electrocatalysts for efficient air batteries.

关键词： Non-precious metal Nitrogen-rich carbon Fe/Fe_(3)C Fe-N_(x)-C Bifunctional oxygen electrocatalysts

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磺丁基醚-β-环糊精对兰索拉唑的包合作用

中国医药工业杂志 2015年第2期46卷 167-171页

作者：赵孝先李新王菊月赵凯张乐河北医科大学第四医院河北石家庄050051 河北凯盛医药科技有限公司河北石家庄050035 江西欧氏药业有限责任公司江西新余338004

采用冷冻干燥法制备兰索拉唑的磺丁基醚-β-环糊精(SBE-β-CD)包合物。差示扫描量热、红外光谱和薄层色谱分析结果显示,兰索拉唑与SBE-β-CD间存在相互作用,形成了包合物。相溶解度法研究表明,兰索拉唑的表观溶解度随SBE-β-CD浓度及p ... 详细信息

采用冷冻干燥法制备兰索拉唑的磺丁基醚-β-环糊精(SBE-β-CD)包合物。差示扫描量热、红外光谱和薄层色谱分析结果显示,兰索拉唑与SBE-β-CD间存在相互作用,形成了包合物。相溶解度法研究表明,兰索拉唑的表观溶解度随SBE-β-CD浓度及p H值的增加而增大。包合物在p H 6.8介质中5 min时溶出率为93%,显著高于原药及其与SBE-β-CD的物理混合物(0.04%和6%)。

关键词：兰索拉唑磺丁基-β-环糊精包合物

椭圆高斯分布半导体激光器泵浦被动调Q激光器的优化

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红外与激光工程 2017年第3期46卷 77-83页

作者：罗小贤赵柏秦纪亚飞庞艺中国科学院半导体研究所北京100083

在考虑泵浦光束和初始反转粒子数椭圆高斯分布的条件下,确定了新的调Q耦合速率方程。在椭圆高斯分布近似下,通过数值分析的方法针对脉冲能量进行优化,首次得到了归一化的脉冲能量和反射镜反射率等关键参数与无量纲变量z的关系曲线。文... 详细信息

在考虑泵浦光束和初始反转粒子数椭圆高斯分布的条件下,确定了新的调Q耦合速率方程。在椭圆高斯分布近似下,通过数值分析的方法针对脉冲能量进行优化,首次得到了归一化的脉冲能量和反射镜反射率等关键参数与无量纲变量z的关系曲线。文中以半导体激光器贴近端面泵浦,Cr4+:YAG作为饱和吸收体的Nd:YVO4被动调Q激光器为例进行了脉冲能量优化计算,在小信号透过率为75%,反射率91.8%时,对应最大脉冲能量1.5μJ,峰值功率81 W,脉冲宽度18.4 ns。选用小信号透过率为73.4%的饱和吸收体和反射率为87%的反射镜进行实验验证,得到的脉冲能量为1.25μJ,峰值功率为76.4 W,脉冲宽度为16.3 ns。理论计算与实验结果基本相符。

关键词：椭圆高斯分布调Q速率方程数值计算优化

3个地理种群蒙古沙拐枣同化枝解剖结构及抗旱性比较

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中国沙漠 2014年第5期34卷 1293-1300页

作者：赵小仙李毅苏世平白潇甘肃农业大学林学院甘肃兰州730070

按自然降水梯度沿河西走廊从东到西选择3个地理种群蒙古沙拐枣为研究对象,采用常规石蜡切片方法和光学显微镜观察的方法对同化枝解剖结构进行比较分析。测定了同化枝直径、细胞角质化外壁厚等15个抗旱性结构指标,并进行方差分析和相关... 详细信息

按自然降水梯度沿河西走廊从东到西选择3个地理种群蒙古沙拐枣为研究对象,采用常规石蜡切片方法和光学显微镜观察的方法对同化枝解剖结构进行比较分析。测定了同化枝直径、细胞角质化外壁厚等15个抗旱性结构指标,并进行方差分析和相关性分析以及主成分分析,采用隶属函数对不同种群抗旱性进行综合评价。结果表明:研究的同化枝都具有典型的旱生结构,这是植物长期适应干旱环境的结果;其中14个指标在各种群间的差异极显著;筛选出了4项具有代表性的旱性结构指标——细胞角质化外壁厚、气室径向长、皮下纤维簇数/直径以及小维管束个数/直径。对蒙古沙拐枣抗旱性进行综合评价得出,3个地理种群随着水分条件的降低其抗旱性增强,抗旱性大小顺序为酒泉>张掖>武威。

关键词：沙拐枣同化枝解剖结构抗旱性