检索结果-南通市图书馆

Collective diffusion in carbon nanotubes: Crossover between one dimension and three dimensions

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2016年第8期25卷 308-311页

作者：陈沛荣徐志成古宇钟伟荣 Siyuan laboratory Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials Department of PhysicsCollege of Science and Engineering Jinan University

Using non-equilibrium molecular dynamics and Monte Carlo methods, we study the collective diffusion of helium in carbon nanotubes. The results show that the collective diffusion coefficient（CDC） increases with the dimension of the channel. The collective diffusion coefficient has a linear relationship with the temperature and the concentration. There exist a ballistic transport in short carbon nanotubes and a diffusive transport in long carbon nanotubes. Fick＇s law has an invalid region in the nanoscale channel.

关键词： transport carbon nanotube fluid

Efficient and Stable Perovskite Solar Cells and Modules Enabled by Tailoring Additive Distribution According to the Film Growth Dynamics

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 387-400页

作者： Mengen Ma Cuiling Zhang Yujiao Ma Weile Li Yao Wang Shaohang Wu Chong Liu Yaohua Mai Institute of new energy Technology College of Physics&Optoelectronic EngineeringJinan UniversityGuangzhou 510632People’s Republic of China key laboratory of new Semiconductors and Devices of Guangdong Higher Education Institutes Jinan UniversityGuangzhou 510632People’s Republic of China Guangdong Mellow energy Co. LimitedYuanming RoadZhuhai 519075GuangdongPeople’s Republic of China

Gas quenching and vacuum quenching process are widely applied to accelerate solvent volatilization to induce nucleation of perovskites in blade-coating *** this work,we found these two pre-crystallization processes lead to different order of crystallization dynamics within the perovskite thin film,resulting in the differences of additive *** then tailor-designed an additive molecule named 1,3-bis(4-methoxyphenyl)thiourea to obtain films with fewer defects and holes at the buried interface,and prepared perovskite solar cells with a certified efficiency of 23.75%.Furthermore,this work also demonstrates an efficiency of 20.18%for the large-area perovskite solar module(PSM)with an aperture area of 60.84 cm^(2).The PSM possesses remarkable continuous operation stability for maximum power point tracking of T_(90)>1000 h in ambient air.

关键词： Gas quenching Additive distribution Buried passivation Blade coating Crystallization dynamics

Ru doping triggering reconstruction of cobalt phosphide for coupling glycerol electrooxidation with seawater electrolysis

在线全文

学校读者我要写书评

暂无评论

Journal of energy Chemistry 2025年第01期 317-326页

作者： Binglu Deng Jie Shen Jinxing Lu Chuqiang Huang Zhuoyuan Chen Feng Peng Yunpeng Liu School of materials Science and Hydrogen energy Foshan University School of Chemistry and Chemical Engineering Guangzhou University Guangdong key laboratory for Hydrogen energy technologies

Seawater electrolysis is a promising approach for sustainable energy without relying on precious ***,the large-scale seawater electrolysis is hindered by low catalytic efficiency and severe anode corrosion caused by the harmful *** contrast to the oxygen evolution reaction （OER）and chlorin ion oxidation reaction （ClOR）,glycerol oxidation reaction （GOR） is more thermodynamically and kinetically favorable ***,a Ru doping cobalt phosphide （Ru-CoP2） is proposed as a robust bifunctional electrocatalyst for seawater electrolysis and GOR,for the concurrent productions of hydrogen and value-added *** in situ and ex situ characterization analyses demonstrated that Ru doping featured in the dynamic reconstruction process from Ru-CoP2to Ru-CoOOH,accounting for the superior GOR *** coupling GOR with hydrogen evolution was realized by employing Ru-CoP2as both anode and cathode,requiring only a low voltage of 1.43 V at 100 mA cm-2,which was 250 m V lower than that in alkaline *** work guides the design of bifunctional electrocatalysts for energy-efficient seawater electrolysis coupled with biomass resource upcycling.

关键词：

In Situ Monitoring the Potassium‑Ion Storage Enhancement in Iron Selenide with Ether‑Based Electrolyte

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2021年第11期13卷 294-307页

作者： Xiaodan Li Jinliang Li Wenchen Zhuo Zhibin Li Liang Ma Zhong Ji Likun Pan Wenjie Mai Siyuan laboratory Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy MaterialsGuangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New MaterialsDepartment of PhysicsJinan UniversityGuangzhouGuangdong 510632People’s Republic of China Shanghai key laboratory of Magnetic Resonance School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241People’s Republic of China

As one of the promising anode materials,iron selenide has received much attention for potassium-ion batteries(KIBs).Nevertheless,volume expansion and sluggish kinetics of iron selenide result in the poor reversibility and stability during potassiation–depotassiation *** this work,we develop iron selenide composite matching ether-based electrolyte for KIBs,which presents a reversible specific capacity of 356 mAh g^(−1) at 200 mA g^(−1) after 75 *** to the measurement of mechanical properties,it is found that iron selenide composite also exhibits robust and elastic solid electrolyte interphase layer in ether-based electrolyte,contributing to the improvement in reversibility and stability for *** further investigate the electrochemical enhancement mechanism of ether-based electrolyte in KIBs,we also utilize in situ visualization technique to monitor the potassiation–depotassiation *** comparison,iron selenide composite matching carbonate-based electrolyte presents vast morphology change during potassiation–depotassiation *** changing to ether-based electrolyte,a few minor morphology changes can be *** phenomenon indicates an occurrence of homogeneous electrochemical reaction in ether-based electrolyte,which results in a stable performance for potassium-ion(K-ion)*** believe that our work will provide a new perspective to visually monitor the potassium-ion storage process and guide the improvement in electrode material performance.

关键词： Iron selenide Ether-based electrolyte In situ visualization technique Potassium-ion batteries

Self-powered and broadband germanium/PEDOT:PSS heterojunction photodetectors for near-infrared biomedical imaging applications

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2021年第11期64卷 2523-2531页

作者： WU QiuYue LIU YuJin HUANG XinYue ZHENG Xu HE JieZhong JI Zhong MAI WenJie Siyuan laboratory Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy MaterialsDepartment of PhysicsJinan UniversityGuangzhou 510632China

To develop high-performance photodetectors(PDs) as near-infrared(NIR) imaging sensors, researchers have either proposed new photoelectric materials, introduced complicated interface-processing steps, or created complex optical structures. In this study, we introduce a solution-processed organic material, PEDOT:PSS(PEDOT corresponds to a polymer of 3,4-ethylene dioxythiophene(EDOT), and PSS corresponds to a polystyrene sulfonate), to germanium(Ge) wafers using a convenient spincoating method to improve the photoresponse performance of Ge-based PDs. The Ge wafers and PEDOT:PSS form a heterojunction that reduces the dark current when compared with the Ge Schottky PD(Au/Ge/Ag PD). The experimental results show that the Au/PEDOT:PSS/Ge/Ag heterojunction PD with a bias voltage of 0 V at 1550 nm exhibits a responsivity(R) of 0.26 A/W,a detectivity(D*) of 6.5×1011 Jones, a linear dynamic range(LDR) of 124 d B, and a bandwidth(-3 dB) of 10 k Hz. This implies that the performance of the PD is comparable to that of previously reported Ge-based PDs. Subsequently, a biomedical imaging application of the PD is successfully demonstrated through foreign-body detection. Therefore, it is expected that the selfpowered Au/PEDOT:PSS/Ge/Ag PD will be highly suitable for NIR imaging.

关键词： gemanium photodetectors PEDOT:PSS heterojunction self-powered photodetectors near-infrared biomedical imaging

Manipulating Interfacial Stability Via Absorption-Competition Mechanism for Long-Lifespan Zn Anode

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2022年第2期14卷 161-173页

作者： Meijia Qiu Liang Ma Peng Sun Zilong Wang Guofeng Cui Wenjie Mai key laboratory for Polymeric Composite&Functional materials of Ministry of Education School of ChemistryKey Laboratory of Low-Carbon Chemistry&Energy Conservation of Guangdong ProvinceSun Yat-Sen UniversityGuangzhou 510275People’s Republic of China Siyuan laboratory Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy MaterialsGuangzhou Key Laboratory of Vacuum Coating Technologies and New Energy MaterialsDepartment of PhysicsJinan UniversityGuangdong 510632People’s Republic of China

The stability of Zn anode in various Znbased energy storage devices is the key problem to be ***,aromatic aldehyde additives are selected to modulate the interface reactions between the Zn anode and *** comprehensively considering electrochemical measurements,DFT calculations and FEA simulations,novel mechanisms of one kind of aromatic aldehyde,veratraldehyde in inhibiting Zn dendrite/by-products can be *** additive prefers to absorb on the Zn surface than H_(2)O molecules and Zn^(2+),while competes with hydrogen evolution reaction and Zn plating/stripping proces s via redox reactions,thus preventing the decomposition of active H_(2)O near the interface and uncontrollable Zn dendrite growth via a synactic absorption-competition *** a result,Zn-Zn symmetric cells with the veratraldehyde additive realize an excellent cycling life of 3200 h under 1 mA cm^(-2)/1 mAh cm^(-2)and over 800 h even under 5 mA cm^(-2)/5 mAh cm^(-2).Moreover,Zn-Ti and Zn-MnO_(2)cells with the veratraldehyde additive both obtain elevated performance than that with pure ZnSO_(4)***,two more aromatic aldehyde additives are chosen to prove their universality in stabilizing Zn anodes.

关键词： Aromatic aldehyde Absorption-competition mechanism Zn anode Interfacial stability

A novel Sn-based coordination polymer with high-efficiency and ultrafast lithium storage

在线全文

学校读者我要写书评

暂无评论

Journal of materials Science & Technology 2022年第2期97卷 156-164页

作者： Xinlu Zhang Lu Han Junfeng Li Ting Lu Jinliang Li Guang Zhu Likun Pan Shanghai key laboratory of Magnetic Resonance School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China Siyuan laboratory Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy MaterialsGuangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy MaterialsDepartment of PhysicsJinan UniversityGuangzhouGuangdong 510632China key laboratory of SpinElectron and Nanomaterials of Anhui Higher Education Institutes Suzhou UniversitySuzhou 234000China

Recently,Coordination Polymers(CPs)have been widely utilized as energy storage materials for reversible Lithium-Ion Batteries(LIBs)benefiting from their tunable building blocks and adjusted electrochemical ***,the unsatisfied electrochemical behavior of CPs with poor conductivity and sluggish ion transport kinetics is still a bottle-neck for their large-scale energy storage applications in ***,we display the rational fabrication of a conductive Sn-based coordination polymer(Sn-DHTPA)via judiciously choosing suitable building *** Sn-DHTPA is employed as anode for LIBs,exhibiting superior reversible storage capacity of 1142.6 m A h g^(-1) at 0.1 A g^(-1) after 100 cycles and impressive rate storage capability of 287.7 m A h g^(-1)at 20 A g^(-1).More importantly,a robust cycling performance of 205.5 m A h g^(-1) at an extra-high current density of 20 A g^(-1) are observed without remarkable capacity-fading up to1000 *** behavior superiority of Sn-DHTPA is related to its advanced architecture with abundant lithium storage sites,high electrical conductivity and rapid lithium transport.A series of ex-situ characterizations reveal that the impressive lithium storage capacity is contributed by the redox active sites of both the aromatic linker and metal center related to in-situ generated metallic nanoparticles dispersed in the skeleton.

关键词： Sn-based coordination polymer High electrical conductivity Li-ion batteries Anode Lithium storage mechanism

All-inorganic lead-free NiO_(x)/Cs_(3)Bi_(2)Br_(9) perovskite heterojunction photodetectors for ultraviolet multispectral imaging

在线全文

学校读者我要写书评

暂无评论

Nano Research 2022年第2期15卷 1094-1101页

作者： Yujin Liu Yuxin Gao Jingyi Zhi Rongqing Huang Wanjun Li Xinyue Huang Genghua Yan Zhong Ji Wenjie Mai Siyuan laboratory Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy MaterialsDepartment of PhysicsJinan UniversityGuangzhou 510632China.

Bismuth-based perovskites are considered to be promising candidates to substitute the toxic lead-based perovskite in optoelectronics due to their excellent optoelectronic properties,high environmental friendliness,and(moisture,light,and heat)***,there are still few reports about high performance bismuth-based perovskite ultraviolet photodetectors,and is more lacking in ultraviolet imaging ***,we reported a self-powered NiO_(x)/Cs_(3)Bi_(2)Br_(9) heterojunction photodetector with excellent photodetection performance by electrochemical depositing NiOx as the hole transport *** optimized NiO_(x)/CsaBi_(2)Brg heterojunction photodetector exhibits excellent ultraviolet detection performance with a fast response speed of 3.04/4.65 ms,wide linear dynamic range of 116.6 dB,decent responsivity of 4.33 mA·W^(-1) at 0 V bias,and high detectivity of 1.3×10^(11) *** outstanding performance of the optimized NiO_(x)/Cs_(3)Bi_(2)Br_(9) heterojunction photodetector is enough to meet the high-quality ultraviolet ***,we further integrated the optimized NiO_(x)/Cs_(3)Bi_(2)Br_(9) heterojunction photodetector to the transmission mode ultraviolet multispectral imaging system,achieving admirable imaging results at weak light *** work will play a positive role in promoting the development of bismuth-based ultraviolet photodetection and ultraviolet multispectral imaging.

关键词： bismuth perovskites heterojunction photodetectors multispectral imaging

Colorless-to-colorful switching of electrochromic MXene by reversible ion insertion

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2022年第4期15卷 3587-3593页

作者： Jianxia Jiang Leiqiang Qin Joseph Halim Per O.Å.Persson Lintao Hou Johanna Rosen guangzhou key laboratory of vacuum coating technologies and new energy materials Physics DepartmentJinan UniversityGuangzhou 510632China Department of Physics Chemistry and Biology(IFM)Linköping UniversityLinköping SE-58183Sweden

Electrochromic(EC)materials that change color with voltage have been widely studied for use in dynamic ***,colorless-to-colorful switching with high contrast ratio is generically unattainable,especially for colorless-to-black electrochromic materials with an ultrahigh contrast ratio over the entire visible *** this work,we developed Nb_(1.33)C MXene-based dynamic windows with colorless-to-black switching of up to 75%reversible change in transmittance from 300 to 1,500 *** exploring the electrochromic effects of different electrolytes through in situ optical changes and electrochemical quartz crystal microbalance(EQCM),it is found that electrochromic behavior is greatly influenced by the extent of reversible Li^(+)insertion/deinsertion between the two-dimensional Nb_(1.33)C MXene *** addition,a colorless-to-black EC device based on Nb_(1.33)C with an overall integrated contrast ratio over 80%was successfully constructed by a solution-processable spin coating *** work enables a simple route to fabricate MXene-based high-performance electrochromic smart windows,which is important for further expanding the application of MXenes to optoelectronic and photonic applications.

关键词： MXenes electrochromic materials colorless-to-black switching high contrast ratio reversible Li^(+)insertion