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Oxygen vacancies with localized electrons direct a functionalized separator toward dendrite-free and high loading LiFePO_(4)for lithium metal batteries

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Journal of Energy Chemistry 2022年第12期75卷 38-45,I0002页

作者： Qi An Qing Liu Shimin Wang Lixiang Liu Han Wang Yongjiang Sun Lingyan Duan Genfu Zhao Hong Guo School of Materials and Energy Yunnan UniversityNo.2Green Lake North RoadKunming 650091YunnanChina Institute for Integrative Nanosciences Leibniz IFW DresdenHelmholtzstraße 2001069 DresdenGermany

The pursuit of high energy density has promoted the development of high-performance lithium metal batteries(LMBs).However,the underestimated but non-negligible dendrites of Li anode have been observed to shorten battery lifespan.Herein,a composite separator(TiO_(2-x)@PP),in which TiO_(2)with electron-localized oxygen vacancies(TiO_(2-x))is coated on a commercial PP separator,is fabricated to homogenize lithium ion transport and stabilize the lithium anode interface.With the utilization of TiO_(2-x)@PP separators,the symmetric lithium metal battery displays enhanced cycle stability over 800 h under a high current density of 8 m A cm^(-2).Moreover,the LMBs assembled with high-loading LiFePO_(4)(9.24 mg cm^(-2))deliver a stable cycling performance over 900 cycles at a rate of 0.5 C.Comprehensive theoretical studies based on density functional theory(DFT)further unveil the mechanism.The favorable TiO_(2-x)is beneficial for facilitating fast Li+migration and impeding anions transfer.In addressing the Li dendrite issues,the use of TiO_(2-x)@PP separator potentially provides a facile and attractive strategy for designing well-performing LMBs,which are expected to meet the application requirements of rechargeable batteries.

关键词： Oxygen vacancy Ionic transport regulation Dendrite-free Localized electrons High loading

Light-Driven Ion Transport in Nanofluidic Devices:Photochemical,Photoelectric,and Photothermal Effects

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CCS Chemistry 2022年第1期4卷 54-65页

作者： Kai Xiao Oliver G.Schmidt Department of Biomedical Engineering Southern University of Science and Technology(SUSTech)Shenzhen 518055 Center for Materials Architectures and Integration of Nanomembranes(MAIN)Chemnitz University of TechnologyChemnitz 09126 Institute for Integrative Nanosciences Leibniz IFW DresdenDresden 01069

Light-driven ion transport in nanofluidic devices is a phenomenon where ions move unidirectionally by consuming optical energy,either from low concentration to high concentration or vice versa.The light-driven unidirectional ion transport offers intriguing application potential in desalination and ion separation,osmosis energy harvesting,and ionic machines benefiting from the remote noncontact light stimulus.Here,we review recent progress in nanofluidic-based light-driven ion transport systems and emphasize similarities and differences in the three underlying working principles based on photochemical,photoelectric,and photothermal effects.The current challenges and future developments of light-driven ion transport in nanofluidic devices are discussed.We believed that this article encourages further innovation in this exciting and emerging research field.

关键词： nanofluidic artificial ion pump nanochannel ion transport photoelectric effect

Advanced architecture designs towards high-performance 3D microbatteries

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Nano Materials Science 2021年第2期3卷 140-153页

作者： Yang Li Jiang Qu Fei Li Zhe Qu Hongmei Tang Lixiang Liu Minshen Zhu Oliver G.Schmidt Material Systems for Nanoelectronics Chemnitz University of Technology09107 ChemnitzGermany Institute for Integrative Nanosciences Leibniz IFW Dresden01069 DresdenGermany Center for Materials Architectures and Integration of Nanomembranes(MAIN)Chemnitz University of Technology09126 ChemnitzGermany School of Science Dresden University of TechnologyDresden01062Germany

Rechargeable microbatteries are important power supplies for microelectronic devices.Two essential targets for rechargeable microbatteries are high output energy and minimal footprint areas.In addition to the development of new high-performance electrode materials,the device configurations of microbatteries also play an important role in enhancing the output energy and miniaturizing the footprint area.To make a clear vision on the design principle of rechargeable microbatteries,we firstly summarize the typical configurations of microbatteries.The advantages of different configurations are thoroughly discussed from the aspects of fabrication technologies and material engineering.Towards the high energy output at a minimal footprint area,a revolutionary design for microbatteries is of great importance.In this perspective,we review the progress of fabricating microbatteries based on the rolled-up nanotechnology,a derivative origami technology.Finally,we discussed the challenges and perspectives in the device design and materials optimization.

关键词： Microbatteries Origami technologies Rolled-up nanotechnology 3D devices Energy storage performance

Role of graphene in improving catalytic behaviors of AuNPs/MoS_(2)/Gr/Ni-F structure in hydrogen evolution reaction

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Chinese Physics B 2021年第8期30卷 551-557页

作者：修显武张文程侯淑婷李振雷风采许士才李崇辉满宝元郁菁张超 School of Physics and Electronics Collaborative Innovation Center of Light Manipulations and ApplicationsInstitute of Materials and Clean EnergyShandong Normal UniversityJinan 250014China College of Chemistry Chemical Engineering and Materials ScienceInstitute of Biomedical SciencesShandong Normal UniversityJinan 250014China Shandong Key Laboratory of Biophysics Institute of BiophysicsDezhou UniversityDezhou 253023China Institute for Integrative Nanosciences IFW DresdenDresden01069Germany

The efficient production of hydrogen through electrocatalytic decomposition of water has broad prospects in modern energy equipment.However,the catalytic efficiency and durability of hydrogen evolution catalyst are still very deficient,which need to be further explored.Here in this work,we prove that introducing a graphene layer(Gr)between the molybdenum disulfide and nickel foam(Ni-F)substrate can greatly improve the catalytic performance of the hybrid.Owing to the excitation of local surface plasmon resonance(LSPR)of gold nanoparticles(NPs),the electrocatalytic hydrogen releasing activity of the MoS_(2)/Gr/Ni-F heterostructure is greatly improved.This results in a significant increase in the current density of AuNPs/MoS_(2)/Gr/Ni-F composite material under light irradiation and in the dark at 0.2 V(versus reversible hydrogen electrode(RHE)),which is much better than in MoS_(2)/Gr/Ni-F composite materials.The enhancement of hydrogen release can be attributed to the injection of hot electrons into MoS_(2)/Gr/Ni-F by AuNPs,which will improve the electron density of MoS_(2)/Gr/Ni-F,promote the reduction of H_(2)O,and further reduce the activation energy of the electrocatalyst hydrogen evolution reaction(HER).We also prove that the introduction of graphene can improve its stability in acidic catalytic environments.This work provides a new way of designing efficient water splitting system.

关键词： hydrogen evolution reaction catalytic graphene plasmon resonance

Nano energy for miniaturized systems

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Nano Materials Science 2021年第2期3卷 107-112页

作者： Minshen Zhu Feng Zhu Oliver G.Schmidt Institute for Integrative Nanosciences Leibniz IFW Dresden01069DresdenGermany State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of Sciences130022ChangchunChina Material Systems for Nanoelectronics Chemnitz University of Technology09107ChemnitzGermany Center for Materials Architectures and Integration of Nanomembranes(MAIN)Chemnitz University of Technology09126ChemnitzGermany School of Science Dresden University of TechnologyGermany

Skin mountable electronic devices are in a high-speed development at the crossroads of materials science,electronics,and computer science.Sophisticated functions,such as sensing,actuating,and computing,are integrated into a soft electronic device that can be firmly mounted to any place of human body.These advanced electronic devices are capable of yielding abilities for us whenever they are needed and even expanding our abilities beyond their natural limitations.Despite the great promise of skin mounted electronic devices,they still lack satisfactory power supplies that are safe and continuous.This Perspective discusses the prospects of the development of energy storage devices for the next generation skin mountable electronic devices based on their unique requirements on flexibility and miniaturized size.

关键词： Micro-energy-storage devices Wearability Flexibility Electronics

Recent developments of stamped planar micro-supercapacitors: Materials,fabrication and perspectives

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Nano Materials Science 2021年第2期3卷 154-169页

作者： Fei Li Yang Li Jiang Qu Jinhui Wang Vineeth Kumar Bandari Feng Zhu Oliver G.Schmidt Material Systems for Nanoelectronics Chemnitz University of Technology09107ChemnitzGermany State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of Sciences130022ChangchunChina Center for Materials Architectures and Integration of Nanomembranes(MAIN)Chemnitz University of Technology09126ChemnitzGermany Institute for Integrative Nanosciences Leibniz IFW Dresden01069DresdenGermany School of Science Dresden University of Technology01062DresdenGermany

The rapid development of wearable and portable electronics has dramatically increased the application for miniaturized energy storage components.Stamping micro-supercapacitors(MSCs)with planar interdigital configurations are considered as a promising candidate to meet the requirements.In this review,recent progress of the different stamping materials and various stamping technologies are first discussed.The merits of each material,manufacturing process of each stamping method and the properties of stamping MSCs are scrutinized,respectively.Further insights on technical difficulties and scientific challenges are finally demonstrated,including the limited thickness of printed electrodes,poor overlay accuracy and printing resolution.

关键词： Microsupercapacitors Stamping Microfabrication Miniaturized electronics Energy storage devices

Effect of Eu3+,Bi3+,and Li+ doping on luminescent property of GdNbO4

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Journal of Rare Earths 2024年第1期42卷 66-75页

作者： S.W.Wi Y.S.Lee Department of Physics and integrative institute of Basic Sciences Soongsil University

We investigated the emission properties of Eu3+-doped GdNbO4-based oxide phosphors,aiming at improving the Eu3+emission by codoping of Bi3+and Li+.Eu3+singly doped,Eu3+and Bi3+doubly doped,and Eu3+,Bi3+,and Li+triply doped GdNbO4were prepared using a high-temperature solid-state reaction method.The red-orange emissions from Eu3+in the singly doped samples are significantly improved by the codoping of Bi3+,mainly due to the energy transfer from Bi3+to Eu3+.The additional codoping of Li+is found to increase the Eu3+emission significantly.This improvement might be attributed to the increase in the photoluminescent quantum yield originating from larger grain sizes and better crystallinity.A detailed analysis of the X-ray diffraction pattern and the asymmetric ratio estimated from the photoluminescence spectra show that the local lattice environment around Eu3+in GdNbO4does not change significantly with the codoping of Bi3+and Li+.Our results indicate that Li+doping is a promising way to improve the emission properties of rare-earth ion-doped GdNbO4phosphors.

关键词： Eu 3+ GdNbO 4 Codoping of Li + Photoluminescence Sensitizer Rare earths

Broadband photonic structures for quantum light sources

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Journal of Semiconductors 2019年第7期40卷 55-62页

作者： Zhe He Jiawei Yang Lidan Zhou Yan Chen Tianming Zhao Ying Yu Jin Liu State Key Laboratory of Optoelectronic Materials and Technologies School of Physics Sun Yat-sen University Guangzhou 510275 China State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information Technology Sun Yat-sen University Guangzhou 510275 China Institute for Integrative Nanosciences Leibniz IFW Dresden Helmholtzstrasse 20 Dresden 01069 Germany

Quantum light sources serve as one of the key elements in quantum photonic technologies. Such sources made from semiconductor material, e.g., quantum dots (QDs), are particularly appealing because of their great potential of scalability enabled by the modern planar nanofabrication technologies. So far, non-classic light sources based on semiconductor QDs are currently outperforming their counterparts using nonlinear optical process, for instance, parametric down conversion and four-wave mixing. To fully exploring the potential of semiconductor QDs, it is highly desirable to integrate QDs with a variety of photonic nanostructures for better device performance due to the improved light-matter interaction. Among different designs, the photonic nanostructures exhibiting broad operation spectral range is particularly interesting to overcome the QD spectral inhomogeneity and exciton fine structure splitting for the generations of single-photon and entangled photon pair respectively. In this review, we focus on recent progress on high-performance semiconductor quantum light sources that is achieved by integrating single QDs with a variety of broadband photonic nanostructures i.e. waveguide, lens and low-Q cavity.

关键词： photonic nanowire photonic crystal waveguide solid immersion lens micro-lens circular Bragg grating

Targeted Sub-Attomole Cancer Biomarker Detection Based on Phase Singularity 2D Nanomaterial-Enhanced Plasmonic Biosensor

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Nano-Micro Letters 2021年第6期13卷 284-294页

作者： Yuye Wang Shuwen Zeng Aurelian Crunteanu Zhenming Xie Georges Humbert Libo Ma Yuanyuan Wei Aude Brunel Barbara Bessette Jean-Christophe Orlianges Fabrice Lalloué Oliver GSchmidt Nanfang Yu Ho-Pui Ho Department of Biomedical Engineering The Chinese University of Hong KongShatinNew TerritoriesHong KongPeople’s Republic of China CNRS XLIM Research InstituteUMR 7252University of Limoges123Avenue Albert ThomasLimogesFrance Department of Applied Physics and Applied Mathematics Columbia UniversityNew York CityNYUSA Institute for Integrative Nanosciences IFW DresdenHelmholtzstr.20DresdenGermany Faculty of Medicine University of LimogesEA3842-CAPTuRGEIST2 rue du Dr MarclandLimogesFrance

Detection of small cancer biomarkers with low molecular weight and a low concentration range has always been challenging yet urgent in many clinical applications such as diagnosing early-stage cancer,monitoring treatment and detecting relapse.Here,a highly enhanced plasmonic biosensor that can overcome this challenge is developed using atomically thin two-dimensional phase change nanomaterial.By precisely engineering the configuration with atomically thin materials,the phase singularity has been successfully achieved with a significantly enhanced lateral position shift effect.Based on our knowledge,it is the first experimental demonstration of a lateral position signal change>340μm at a sensing interface from all optical techniques.With this enhanced plasmonic effect,the detection limit has been experimentally demonstrated to be 10^(-15) mol L^(−1) for TNF-α cancer marker,which has been found in various human diseases including inflammatory diseases and different kinds of cancer.The as-reported novel integration of atomically thin Ge_(2)Sb_(2)Te_(5) with plasmonic substrate, which results in a phase singularity and thus a giant lateral position shift, enables the detection of cancer markers with low molecular weight at femtomolar level. These results will definitely hold promising potential in biomedical application and clinical diagnostics.

关键词： 2D nanomaterials Cancer marker detection Phase singularity Surface plasmon