检索结果-南通市图书馆

Work Function and Electron Affinity of Semiconductors:Doping Effect and Complication due to Fermi Level Pinning

在线全文

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2021年第3期4卷 273-276页

作者： Guosheng Shao State Center for International Cooperation on Designer Low-carbon and Environmental Materials Zhengzhou UniversityZhengzhou 450001China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China Zhengzhou Materials Genome Institute XingyangZhengzhou 450100China

Semiconductors are a major category of functional materials essential to various applications to sustain the modern society.Most applied materials or devices utilizing semiconductors are enabled by interfaces or junctions,such as solar cells,electronic/photonic devices,environmental sensors,and redox hetero-catalysts.Herein,the author provides a critical commentary on photoemission measurement of the work function and,more importantly,the electron affinity of semiconductors essential for energy band diagram of heterojunctions.Particular effort is made towards addressing complications associated with Fermi level pinning due to surficial states of doped semiconductors.

关键词： band edges electron affinity Fermi pinning ultraviolet photoelectron spectroscopy work function

Mechanically robust antifouling coating with dual-functional antifouling strategy by infiltrating PDMS into plasma-sprayed porous Al_(2)O_(3)-Cu coating

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2023年第28期159卷 125-137页

作者： Shuaiqiang Bi Kangwei Xu Guosheng Shao Ke Yang Jiajia Tian State Centre for International Cooperation on Designer Low-Carbon and Environmental Material(SCICDLCEM) School of Materials Science and EngineeringZhengzhou UniversityZhengzhou450001China Henan Institute of Advanced Technology Zhengzhou UniversityZhengzhou450001China Special Functional Materials Department Luoyang Ship Material Research InstituteLuoyang471023China Institute of Metal Research Chinese Academy of SciencesShenyang110016China

Marine biofouling is a worldwide challenge that needs to be solved urgently.Poly(dimethylsiloxane)(PDMS)-based fouling release coatings with low surface free energy(SFE)could effectively inhibit bio-fouling.Nevertheless,their poor mechanical durability,adhesive strength,and antifouling performance under static conditions significantly limit their applications.Herein,a novel mechanically robust Al_(2)O_(3)-PDMS-Cu composite coating with strong adhesive strength and remarkable antifouling performance was developed.The Al_(2)O_(3)-PDMS-Cu coating loaded with a small amount of Cu was fabricated by infiltrating PDMS into plasma-sprayed micro/nano-scaled porous Al_(2)O_(3)-Cu coating.Results showed that the fabri-cation of this Al_(2)O_(3)-PDMS-Cu coating did not alter the surface hydrophobicity and SFE of PDMS signif-icantly,thus presenting little influence on its inherent fouling release property.After rigorous abrasion test,the Al_(2)O_(3)-PDMS-Cu coating presented remarkably improved surface hydrophobicity due to the ex-posure of micro/nano structure,rather than falling offas that of PDMS coating.The combination of excel-lent abrasion resistance and one order of magnitude higher adhesive strength and hardness than PDMS coating contributed to the outstanding mechanical robustness of Al_(2)O_(3)-PDMS-Cu coating.Additionally,the antifouling assays against marine bacteria adhesion(95%reduction rate for Escherichia coli.(E.coli))and algae attachment(96%and 94%reduction rates for Chlorella and Phaeodactylum tricornutum(P.tricor-nutum),respectively after 21 days of incubation)demonstrated the superior antifouling performance of the Al_(2)O_(3)-PDMS-Cu coating.Thus,a high-performance Al_(2)O_(3)-PDMS-Cu antifouling coating with excellent mechanical robustness and long-term antifouling performance was achieved via the combination of me-chanical durability of Al_(2)O_(3)skeleton and the dual-functional antifouling strategy,i.e.,the fouling release property of PDMS and fouling resistance of Cu.

关键词： Marine antifouling Al_(2)O_(3)-PDMS-Cu composite coating Plasma spraying Mechanical robustness Dual-functional strategy Long-lasting antifouling

Introduction of Frontier Outlook

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

Energy & Environmental Materials 2022年第1期5卷 5-5页

作者： Kang Xu Guosheng Shao US Army Research Laboratory Adelphi MD 20783-1197USA Zhengzhou University Zhengzhou 450001China

We are pleased to announce the creation of a new column “Frontier Outlook,” which aims to inspire discussions over a series of frontier and even controversial topics that are of high interest to the readers in the fields of Energy and Environmental Materials. In each column, we invite a prominent expert, who will share his/her opinions.

关键词： Outlook column frontier

Complexity in characterizing semiconductor surfaces: implication to heterojunction mechanisms essential for solar cells and photocatalysis

在线全文

学校读者我要写书评

暂无评论

Complexity in characterizing semiconductor surfaces: implica...

Editor’s Note on “Frontier Outlook” Column

第三届全国太阳能电池材料与器件大会

作者： Guosheng Shao State Centre for International Cooperation on Designer Low-carbon and Environmental Materials Zhengzhou University School of Materials Science and Engineering Zhengzhou University Zhengzhou Materials Genome Institute

Physical phenomena related to surfaces and interfaces are essential to a vast school of academic activities of importance to the current world, covering heterojunctions for environmental sensors, energy saving technologies based on lasers and light emission diodes, solar cells and photocatalysis. This presentation focuses on the usually present but often neglected Fermi-level-pinning(FLP) due to surface states of semiconducting materials. Particular attention is given to reliable measurements of work function, energies for the conduction band minimum(CBM) and valence band maximum(VBM), and more importantly, how to make use of such data to correctly establish heterojunction schemes. Discussion will be extended into applications in addressing interfacial issues for solar cells, photocatalysis, etc.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2022年第2期5卷 365-365页

作者： Kang Xu Guosheng Shao 不详

In this issue,we are pleased to carry on the theme of Frontier Outlook(https://***/10.1002/eem^(2).12313)to publish the invited contribution“The Transference Number”from Prof.Balsara and colleagues.As one of the“triad properties”required to fully describe an electrolyte(i.e.,conductivity,diffusivity,and transference number),the last proved to be the most challenging quantity that can be accurately and reliably determined,as evidenced by the widely scattered data from different techniques。

关键词： Outlook scattered carry

Self-consistent assessment of Li^(+) ion cathodes:Theory vs.experiments

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2021年第8期30卷 229-241,I0006页

作者： Hongjie Xu Weidong Xiao Zhuo Wang Junhua Hu Guosheng Shao School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China Centre for International Cooperation on Designer Low-carbon&Environmental Materials(CDLCEM) Zhengzhou UniversityZhengzhou 450001China Zhengzhou Materials Genome Institute(ZMGI) Zhengzhou 450100China

Transition metal oxide cathodes such as layered Li Co O_(2),spinel Li Mn_(2)O_(4) and olivine Li Fe PO4 have been commercialized for several decades and widely used in the rechargeable Li-ion batteries(LIBs).While great theoretical efforts have been made using the density functional theory(DFT)method,leading to insightful understanding covering materials stability and functional properties,the lack of consistency in choices of functionals and/or convergence criteria makes it somewhat difficult to compare results.It is therefore highly useful to assess these established systems towards self-consistency,thus offering a reliable working basis for theoretical formulation of novel cathodes.Here in this work,we have carried out systematic DFT calculations on the basis of recently established framework covering both thermodynamic stability,functional properties and associated mechanisms.Efforts have been made in selfconsistent selection of exchange-correlation(XC)functionals in terms of dependable accuracy with affordable computational cost,which is essential for high-throughput first-principles calculations.The outcome of the current work on three established cathode systems is in very good agreement with experimental data,and the methodology is to provide a solid basis for designing novel cathode materials without using costing non-local exchange-correlation functionals for structure-energy calculations.

关键词： Li-ion batteries Intercalation-type oxide cathodes Ab initio approaches Self-consistency Density functional theory

Bead-like cobalt-nitrogen co-doped carbon nanocage/carbon nanofiber composite:A high-performance oxygen reduction electrocatalyst for zinc-air batteries

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第1期16卷 545-554页

作者： Bo Zhang Yige Zhao Lu Li Yukun Li Jin Zhang Guosheng Shao Peng Zhang State Center for International Cooperation on Designer Low-carbon and Environmental Materials(CDLCEM) School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China State Key Laboratory of Chemical Resource Engineering Beijing Key Laboratory of Electrochemical Process and Technology for MaterialsBeijing University of Chemical TechnologyBeijing 100029China

Proper regulation of metal-nitrogen carbon(M-N-C)materials derived from zeolitic imidazolate frameworks(ZIFs)is essential to enhance the oxygen reduction reaction(ORR)performance.However,most of the reports focus on the component regulation,and the structure regulation of ZIFs-derived M-N-C materials by a simple preparation method has been barely reported.Herein,using a one-step electrospinning method with subsequent pyrolysis,we have prepared a bead-like cobalt-nitrogen co-doped carbon nanocage/carbon nanofiber(Co-N-C/CNF)composite electrocatalyst with the porous carbon nanocages arranged one by one in the highly conductive carbon nanofibers.Profiting from the fully exposed active sites and improved conductivity,the Co-NC/CNF catalyst exhibits an excellent ORR performance even surpassing the commercial Pt/C catalyst.Density functional theory(DFT)results demonstrate that the CoNP-N1-C2 active sites on Co-N-C/CNF make the core contribution to the improvement of ORR properties.Moreover,the zinc-air battery(ZAB)based on the Co-N-C/CNF catalyst also shows outstanding discharge performance.This study provides a new strategy for the preparation and structural design for ZIFs-derived M-N-C materials as efficient ORR catalysts.

关键词： bead-like structure carbon nanocages electrospinning technology oxygen reduction reaction zinc−air battery

Enabling Argyrodite Sulfides as Superb Solid-State Electrolyte with Remarkable Interfacial Stability Against Electrodes

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

Energy & Environmental Materials 2022年第3期5卷 852-864页

作者： Hongjie Xu Guoqin Cao Yonglong Shen Yuran Yu Junhua Hu Zhuo Wang Guosheng Shao School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China State Centre for International Cooperation on Designer Low-Carbon&Environmental Materials(CDLCEM) Zhengzhou UniversityZhengzhou 450001China Zhengzhou Materials Genome Institute(ZMGI) Building 2Zhongyuanzhigu Xingyang 450100China

While argyrodite sulfides are getting more and more attention as highly promising solid-state electrolytes(SSEs)for solid batteries,they also suffer from the typical sulfide setbacks such as poor electrochemical compatibility with Li anode and high-voltage cathodes and serious sensitivity to humid air,which hinders their practical applications.Herein,we have devised an effective strategy to overcome these challenging shortcomings through modification of chalcogen chemistry under the guidance of theoretical modeling.The resultant Li_(6.25)PS_(4)O_(1.25)Cl_(0.75)delivered excellent electrochemical compatibility with both pure Li anode and high-voltage LiCoO_(2)cathode,without compromising the superb ionic conductivity of the pristine sulfide.Furthermore,the current SSE also exhibited highly improved stability to oxygen and humidity,with further advantage being more insulating to electrons.The remarkably enhanced compatibility with electrodes is attributed to in situ formation of helpful electrolyte–electrode interphases.The formation of in situ anode–electrolyte interphase(AEI)enabled stable Li plating/stripping in the Li|Li_(6.25)PS_(4)O_(1.25)Cl_(0.75)|Li symmetric cells at a high current density up to 1 mA cm^(-2)over 200 h and 2 mA cm^(-2)for another 100 h.The in situ amorphous nano-film cathode–electrolyte interphase(CEI)facilitated protection of the SSE from decomposition at elevated voltage.Consequently,the synergistic effect of AEI and CEI helped the LiCoO_(2)|Li_(6.25)PS_(4)O_(1.25)Cl_(0.75)|Li full-battery cell to achieve markedly better cycling stability than that using the pristine Li_(6)PS_(5)Cl as SSE,at a high area loading of the active cathode material(4 mg cm^(-2))in type-2032 coin cells.This work is to add a desirable SSE in the argyrodite sulfide family,so that high-performance solid battery cells could be fabricated without the usual need of strict control of the ambient atmosphere.

关键词： al oying chemistry argyrodite sulfide compatibility with high-voltage cathode and lithium anode fast solid lithium ion conductor resilience to humid air

Atomic Layer Coated Al_(2)O_(3) on Nitrogen Doped Vertical Graphene Nanosheets for High Performance Sodium Ion Batteries

在线全文

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2022年第1期5卷 285-294页

作者： Zhiheng Wu Xiangdan Zhang Lijun Deng Yongshang Zhang Zhuo Wang Yonglong Shen Guosheng Shao State Center for International Cooperation on Designer Low-carbon&Environmental Materials(CDLCEM) School of Materials Science and EngineeringZhengzhou University100 Kexue AvenueZhengzhou 450001China Zhengzhou Materials Genome Institute(ZMGI) Building 2ZhongyuanzhiguXingyangZhengzhou 450100China Center for Advanced analysis&Gene Sequencing Zhengzhou UniversityZhengzhou 450001China

Heteroatom doped graphene materials are considered as promising anode for high-performance sodium-ion batteries(SIBs).Defective and porous structure especially with large specific surface area is generally considered as a feasible strategy to boost reaction kinetics;however,the unwanted side reaction at the anode hinders the practical application of SIBs.In this work,a precisely controlled Al_(2)O_(3)coated nitrogen doped vertical graphene nanosheets(NVG)anode material has been proposed,which exhibits excellent sodium storage capacity and cycling stability.The ultrathin Al_(2)O_(3)coating on the NVG is considered to help construct an advantageous interface between electrode and electrolyte,both alleviating the electrolyte decomposition and enhancing sodium adsorption ability.As a result,the optimal Al_(2)O_(3)coated NVG materials delivers a high reversible capacity(835.0 mAh g^(-1))and superior cycling stability(retention of 92.3%after 5000 cycles).This work demonstrates a new way to design graphene-based anode materials for highperformance sodium-ion batteries.

关键词： Al_(2)O_(3) nitrogen doped vertical graphene nanosheets reaction kinetics sodium-ion batteries