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Self-corrosion, electrochemical and discharge behavior of commercial purity Al anode via Mn modification in Al-air battery

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Rare Metals 2021年第12期40卷 3501-3511页

作者： Guo-sheng Peng jun Huang Yi-Cheng Gu Guang-sheng Song School of Materials Science and Engineering Anhui University of TechnologyMa’anshan 243002China Key Laboratory of Green Manufacturing and Surface Technology of Advanced Metal Materials Ministry of EducationAnhui University of TechnologyMa'anshan 243002China

The self-corrosion, electrochemical and discharge behavior of commercial purity Al anode via Mn modification in Al-air battery was studied by the hydrogen evolution, weight loss, electrical conductivity, electrochemical and discharge tests. Results show that the synergetic effects of the dissolved Mn and Mn-modifying Al_(3)Fe intermetallic decrease the weight loss and inhibit the hydrogen evolution of commercial purity Al in Na OH solution when minor Mn is introduced. However, more Mn addition leads to the formation of Al_6Mn intermetallic,which has little effect on the weight loss, but accelerates the hydrogen evolution. Mn introduction plays a positive role in activating Al anodes, resulting in a decrease in the anodic polarization and an increase in the discharge voltage. Among all the commercial purity Al-x Mn anodes, 0.1 wt% Mn addition exhibits the best discharge efficiency for Al-air battery.

关键词： Commercial purity Al Mn addition Corrosion Electrochemical activity Discharge behavior

Supramolecular homo-and hetero-chiral donor-acceptor copolymers with distinct nanomorphology and energy transfer efficiency

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Chinese Chemical Letters 2023年第6期34卷 1-3页

作者： Yong-jun lv Cheng Yang College of Chemical Engineering Sichuan University of Science and EngineeringZigong 643000China College of Chemistry Sichuan UniversityChengdu 610065China

Chirality is ubiquitous in many fields such as biology,pharmacology,chemistry,and *** therefore is of great significance to research on chirality generation,chirality transfer,and chirality amplification effects,especially in the living process[1].Supramolecular polymerization has become an efficient tool to organize molecular building blocks based on various chiral motifs[2].

关键词： chiral transfer donor

Cohomology groups of a new class of Kadison-Singer algebras

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Science China Mathematics 2024年第3期67卷 593-606页

作者： Guangyu An Xing Cheng jun sheng School of Mathematics and Data Science Shaanxi University of Science and TechnologyXi’an 710021China

Let N be a maximal discrete nest on an infinite-dimensional separable Hilbert space H,ξ=∑^(∞)_(n=1)en/2n be a separating vector for the commutant N',E_(ξ)be the projection from H onto the subspace[Cξ]spanned by the vectorξ,and Q be the projection from K=H⊕H⊕H onto the closed subspace{(η,η,η)^(T):η∈H}.Suppose that L is the projection lattice generated by the projections(E_(ξ) 0 0 0 0 0 0 0 0),{(E 0 0 0 0 0 0 0 0):E∈N},(I 0 0 0 I 0 0 0 0) and *** show that L is a Kadison-Singer lattice with the trivial ***,we prove that every n-th bounded cohomology group H~n(AlgL,B(K))with coefficients in B(K)is trivial for n≥1.

关键词： Kadison-Singer algebra Kadison-Singer lattice derivation cohomology group

Multidimensional BSDEs with Weak Monotonicity and General Growth Generators

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Acta Mathematica Sinica,English Series 2013年第10期29卷 1885-1906页

作者： sheng jun FAN Long JIANG School of Mathematical Sciences Fudan University College of Sciences China University of Mining and Technology

This paper aims at solving a multidimensional backward stochastic differential equation （BSDE） whose generator g satisfies a weak monotonicity condition and a general growth condition in y. We first establish an existence and uniqueness result of solutions for this kind of BSDEs by using systematically the technique of the priori estimation, the convolution approach, the iteration, the truncation and the Bihari inequality. Then, we overview some assumptions related closely to the monotonieity condition in the literature and compare them in an effective way, which yields that our existence and uniqueness result really and truly unifies the Mao condition in y and the monotonieity condition with the general growth condition in y, and it generalizes some known results. Finally, we prove a stability theorem and a comparison theorem for this kind of BSDEs, which also improves some known results.

关键词： Backward stochastic differential equation. existence and uniqueness weak monotonicitycondition general growth condition comparison theorem

Temperature stability of symmetric activated carbon supercapacitors assembled with in situ electrodeposited poly (vinyl alcohol) potassium borate hydrogel electrolyte

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Chinese Chemical Letters 2018年第4期29卷 637-640页

作者： Wanwan lv Runping Xue sheng Chen Mengjin Jiang College of Polymer Science and Engineering Sichuan University

The temperature stability of supercapacitor（SC） is largely determined by the properties of the *** electrolytes（HGE）, due to their hydrophilic polymer skeleton, show different temperature stability to that of liquid aqueous electrolytes. In this study, symmetric activated carbon（AC） SCs had been assembled with in situ electrodeposited poly（vinyl alcohol） potassium borate（PVAPB） HGE. The electrochemical performance of the SCs was systematically studied at different temperatures. Results show that the conductivity of PVAPB HGE is comparable with that of liquid aqueous electrolytes at different temperatures. The operating temperature range of PVAPB HGE SCs is -5–60°C, while those of the 1 mol/L Na2SO4SCs and the 0.9 mol/L KClSCs are 20–80°C and 20–40°C, respectively. The specific capacitance of PVAPB HGE SC is higher than those of SCs using liquid aqueous electrolytes at any temperature. The excellent temperature stability of PVAPB HGE makes it possible to build stable aqueous SCs in the wider temperature range.

关键词： Hydrogel electrolyte Activated carbon Electrodeposition Temperature stability Supercapacitor

Up-embeddability of Graphs with New Degree-sum

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Acta Mathematicae Applicatae Sinica 2017年第1期33卷 169-174页

作者： sheng-xiang lv Meng-da FU Yan-pei LIU School of Mathematics Hunan University of Science and Technology Department of Mathematics Bei Jing Jiaotong University

Let G be a k（k ≤ 2）-edge connected simple graph with minimal degree ≥ 3 and girth g, r = [g-1/2]. For any edge uv ∈ E（G）, if dG（u）＋ dG（v）〉2v（G） - 2（k ＋ 1）（9 - 2r）/（k ＋ 1）（2r - 1）（g - 2r）... 详细信息

Let G be a k（k ≤ 2）-edge connected simple graph with minimal degree ≥ 3 and girth g, r = [g-1/2]. For any edge uv ∈ E（G）, if dG（u）＋ dG（v）〉2v（G） - 2（k ＋ 1）（9 - 2r）/（k ＋ 1）（2r - 1）（g - 2r）＋ 2（g - 2r - 1）,then G is up-embeddable. Furthermore, similar results for 3-edge connected simple graphs are also obtained.

关键词： maximum genus up-embeddability degree-sum

Stable GeSe thin-film solar cells employing non-toxic SnO_(2)as buffer layer

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Rare Metals 2022年第9期41卷 2992-2997页

作者： Jian-Min Wu Yan-Ping lv Hao Wu Hui-sheng Zhang Fang Wang jun Zhang Jin-Zeng Wang Xiao-Hong Xu Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education School of Chemistry and Materials ScienceShanxi Normal UniversityTaiyuan030000China

Germanium monoselenide(GeSe)has attracted significant attention recently for its excellent optoelectronic properties,nontoxicity,and high ***,the current best-performance GeSe solar cells usually take toxic CdS as the buffer layer that restricts their practical *** we select non-toxic SnO_(2)as the buffer layer and construct environment-friendly SnO_(2)/GeSe heterojunction solar cells.

关键词： stability. heterojunction optoelectronic

Lattice Boltzmann Method for Diffusion-Reaction-Transport Processes in Heterogeneous Porous Media

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Chinese Physics Letters 2004年第7期21卷 1298-1301页

作者： XUYou-sheng ZHONGYi-jun HUANGGuo-Xiang DepartmentofPhysics ZhejiangNormalUniversityJinhua321004 DepartmentofChemistry ZhejiangNormalUniversityJinhua321004 DepartmentofPhysics EastChinaNormalUniversityShanghai200062

Based on the lattice Boltzmann method and general theory of fluids flowing in porous media, a numerical model is presented for the diffusion-reaction-transport (DRT) processes in porous media. As a test, we simulate a DRT process in a two-dimensional horizontal heterogeneous porous medium. The influence of gravitation in this case can be neglected, and the DRT process can be described by a strongly heterogeneous diagnostic test strip or a thin confined piece of soil with stochastically distributing property in horizontal directions. The results obtained for the relations between reduced fluid saturation S, concentration c1, and concentration c2 are shown by using the visualization computing technique. The computational efficiency and stability of the model are satisfactory.

关键词： Fluid dynamics Computational physics Statistical physics and nonlinear systems

A Dataflow-Oriented Programming Interface for Named Data Networking

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Journal of Computer Science & Technology 2018年第1期33卷 158-168页

作者： Li-Jing Wang Yong-Qiang lv Ilya Moiseenko Dong-sheng Wang Department of Computer Science and Technology Tsinghua University Beijing 100084 China Tsinghua National Laboratory for Information Science and Technology Tsinghua University Beijing 100084 China Computer Science Department University of California Los Angeles CA 90095 U.S.A.

Inheriting from a data-driven communication pattern other than a location-driven pattern, named data net- working （NDN） offers better support to network-layer dataflow. However, the application developers have to handle complex tasks, such as data segmentation, packet verification, and flow control, due to the lack of proper transport-layer protocols over the network layer. In this study, we design a dataflow-oriented programming interface to provide transport strategies for NDN, which greatly improves the efficiency in developing applications. This interface presents two application data unit; （ADU） retrieval strategies according to different data publishing patterns, in which it adopts an adaptive ADU pipelining algorithm to control the dataflow based on the current network status and data generation rate. The interface also offers network measurement strategies to monitor an abundance of critical metrics infuencing the application performance. We verify the functionality and performance of our interface by implementing a video streaming application spanning 11 time zones over the worldwide NDN testbed. Our experiments show that the interface can efficiently support developing high-performance and dataflow-driven NDN applications.

关键词： named data networking (NDN) dataflow network architecture and design transport-layer protocol