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Metal–Oleate Complex?Derived Bimetallic Oxides Nanoparticles Encapsulated in 3D Graphene Networks as Anodes for Efficient Lithium Storage with Pseudocapacitance

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Nano-Micro Letters 2019年第1期11卷 250-263页

作者： Yingying Cao Kaiming Geng Hongbo Geng Huixiang Ang Jie Pei Yayuan Liu Xueqin Cao junwei Zheng Hongwei gu Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science and Collaborative Innovation Center of Suzhou Nano Science and TechnologySoochow University School of Chemical Engineering and Light Industry Guangdong University of Technology School of Chemical and Biomedical Engineering Nanyang Technological University College of Physics Optoelectronic and Energy Soochow University

In this manuscript, we have demonstrated the delicate design and synthesis of bimetallic oxides nanoparticles derived from metal–oleate complex embedded in 3D graphene networks(MnO/CoMn_2O_4  GN), as an anode material for lithium ion batteries. The novel synthesis of the MnO/CoMn_2O_4  GN consists of thermal decomposition of metal–oleate complex containing cobalt and manganese metals and oleate ligand, forming bimetallic oxides nanoparticles, followed by a selfassembly route with reduced graphene oxides. The MnO/CoMn_2O_4  GN composite, with a unique architecture of bimetallic oxides nanoparticles encapsulated in 3D graphene networks, rationally integrates several benefits including shortening the di usion path of Li^+ ions, improving electrical conductivity and mitigating volume variation during cycling. Studies show that the electrochemical reaction processes of MnO/Co Mn_2O_4  GN electrodes are dominated by the pseudocapacitive behavior, leading to fast Li^+ charge/discharge reactions. As a result, the MnO/CoMn_2O_4  GN manifests high initial specific capacity, stable cycling performance, and excellent rate capability.

关键词： Metal–oleate complex Bimetallic oxides nanoparticles Porous architecture 3D graphene networks Lithium ion batteries

Effect of carboxylic acid groups on the supercapacitive performance of functional carbon frameworks derived from bacterial cellulose

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Chinese Chemical Letters 2017年第12期28卷 2212-2218页

作者： Tianyun Zhang junwei Lang Li Liu Lingyang Liu Hongxia Li Yipeng gu Xingbin Yan Xin Ding College of Textiles Donghua University School of Mechanical and Electronical Engineering Lanzhou University of Technology Laboratory of Clean Energy Chemistry and Materials State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences

Three-dimensional （3D） carbonaceous materials derived from bacterial cellulose （BC） has been introduced as electrode for supercapacitors in recent. Here, we report a simple strategy for the synthesis of functional carbon frameworks through 2,2,6,6-tetramethylpilperidine l-oxyl radical （TEMPO） mediated oxidation of bacterial cellulose （BC） followed by carbonization. TEMPO-mediated oxidation can efficiently convert the hydroxyls on the surface of BC to carboxylate groups to improve electrochemical activity. Because of its high porosity, good hydrophilicity, rich oxygen groups, and continuous ion transport in-between sheet-like porous network, the TEMPO-oxidized BC delivers a much higher gravimetric capacitance （137.3 Fig） at low annealing temperature of 500℃ than that of pyrolysis BC （31 F/g） at the same annealing temperature. The pyrolysis modified BC obtained at 900℃ shows specific capacitance （160.2Fig）, large current stability and long-term stability （84.2% of its initial capacitance retention after 10,000 cycles）.

关键词： Bacterial celluloseCarboxylic acid groupsTEMPO-meditated oxidationPseudocapacitanceSupercapacitorRate capability

实践类课程开展课程思政教学改革的思考与实践——以高分子材料制备与成型创新实验为例

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大学化学 2022年第3期37卷 132-136页

作者：秦建彬史学涛张广成狄西岩顾军渭闫毅西北工业大学化学与化工学院西安710129

开展课程思政教学改革是高校实现三全育人的有效途径,是高校实现立德树人根本任务的重要举措。高分子材料制备与成型创新实验是高分子材料与工程专业的必修专业综合实践类课程,该课程具有思政元素丰富、现场实践教学感染力强等优势。本... 详细信息

开展课程思政教学改革是高校实现三全育人的有效途径,是高校实现立德树人根本任务的重要举措。高分子材料制备与成型创新实验是高分子材料与工程专业的必修专业综合实践类课程,该课程具有思政元素丰富、现场实践教学感染力强等优势。本文以高分子材料制备与成型创新实验为例,从实践类课程开展课程思政教学改革的意义、探索、实践和长效机制等方面进行了系统论述,总结了在实践类课程中开展课程思政教育的具体方法、优势和意义。

关键词：课程思政实践类课程高分子材料科学与工程教学改革

On-chip photonic spatial-temporal descrambler

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Chip 2023年第2期2卷 1-7页

作者： Wenkai Zhang Xueyi Jiang Wentao gu junwei Cheng Hailong Zhou Jianji Dong Dongmei Huang Xinliang Zhang Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Optics Valley Laboratory Wuhan 430074China The Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen 518057China Photonics Research Institute Department of Electrical EngineeringThe Hong Kong Polytechnic UniversityHong Kong 999077China

As an indispensable part to compensate for the signal crosstalk in fiber communication systems,conventional digital multi-input multi-output(MIMO)signal processor is facing the challenges of high com-putational complexity,high power consumption and relatively low processing *** optical MIMOenables the best use of light and has been proposed to remedy this ***,the currently existing optical MIMO methods are all restricted to the spatial di-mension,while the temporal dimension is ***,an on-chip spatial-temporal descrambler with four channels were devised and its MIMO functions were experimentally verified simultaneously in both spatial and temporal *** spatial crosstalk of single-channel descrambler and four-channel descrambler is respectively less than-21 dB and-18 dB,and the time delay is simultaneously com-pensated ***,a more universal model extended to mode-dependent loss and gain(MDL)compensation was further de-veloped,which is capable of being cascaded for the real optical trans-mission *** first attempt at photonic spatial-temporal de-scrambler enriched the varieties of optical MIMO,and the proposed scheme provided a new opportunity for all-optical MIMO signal pro-cessing.

关键词： Optical signal processing Photonic integrated circuits Opti-cal MIMO Optical matrix computing

Photonic matrix multiplication lights up photonicaccelerator and beyond

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Light(Science & Applications) 2022年第2期11卷 158-178页

作者： Hailong Zhou Jianji Dong junwei Cheng Wenchan Dong Chaoran Huang Yichen Shen Qiming Zhang Min gu Chao Qian Hongsheng Chen Zhichao Ruan Xinliang Zhang Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Department of Electronic Engineering The Chinese University of Hong KongShatinHong KongChina Lightelligence Hangzhou 311121China Institute of Photonic Chips University of Shanghai for Science and TechnologyShanghai 200093China Centre for Artificial-Intelligence Nanophotonics School of Optical-Electrical and Computer EngineeringUniversity of Shanghai for Science and TechnologyShanghai 200093China Interdisciplinary Center for Quantum Information State Key Laboratory of Modern Optical InstrumentationZJUHangzhou Global Scientific and Technological Innovation CenterZJU-UIUC InstituteZhejiang UniversityHangzhou 310027China Interdisciplinary Center of Quantum Information State Key Laboratory of Modern Optical Instrumentationand Zhejiang Province Key Laboratory of Quantum Technology and DeviceDepartment of PhysicsZhejiang UniversityHangzhou 310027China

Matrix computation,as a fundamental building block of information processing in science and technology,contributes most of the computational overheads in modern signal processing and artificial intelligence *** accelerators are designed to accelerate specific categories of computing in the optical domain,especially matrix multiplication,to address the growing demand for computing resources and *** matrix multiplication has much potential to expand the domain of telecommunication,and artificial intelligence benefiting from its superior *** research in photonic matrix multiplication has flourished and may provide opportunities to develop applications that are unachievable at present by conventional electronic *** this review,we first introduce the methods of photonic matrix multiplication,mainly including the plane light conversion method,Mach–Zehnder interferometer method and wavelength division multiplexing *** also summarize the developmental milestones of photonic matrix multiplication and the related ***,we review their detailed advances in applications to optical signal processing and artificial neural networks in recent ***,we comment on the challenges and perspectives of photonic matrix multiplication and photonic acceleration.

关键词： interferometer beyond matrix

Time-space multiplexed photonic-electronic digital multiplier

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Photonics Research 2024年第3期12卷 499-504页

作者： WENKAI ZHANG BO WU WENTAO gu junwei CHENG HAILONG ZHOU LIAO CHEN WENCHAN DONG JIANJI DONG XINLIANG ZHANG Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China

Optical computing has shown immense application prospects in the post-Moore ***,as a crucial component of logic computing,the digital multiplier can only be realized on a small scale in optics,restrained by the limited functionalities and inevitable loss of optical *** this paper,we propose a time-space multiplexed architecture to realize large-scale photonic-electronic digital multiplication.

关键词： multiplier electronic restrained

Effect of Storage Time on Main Quality Indicators of Cotton

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Asian Agricultural Research 2023年第9期15卷 44-46页

作者： Yuxi gu Jin WANG Gang YUAN junwei JIA Wei WANG Jinying CHEN Sinograin Chengdu Storage Research Institute Co. Ltd.Chengdu 610091China China Reserve Cotton Management Co. Ltd.Beijing 100000China

The quality indicators of cotton will change during *** the 5.89 million t of Xinjiang cotton from 2016 to 2021 as a sample,this paper analyzed the main fiber quality indicator data of warehouse-in and warehouse-out cotton for storage of 1.5,3.0,4.0,5.0,6.0,and 7.0 *** was found that the color grade of cotton decreased with the extension of storage *** cotton with storage time of 5.0 years mainly changed from white cotton grade 2 and white cotton grade 3 to light yellow stained cotton grade 1 and yellow stained cotton grade *** them,the increase of light yellow stained cotton grade 1 was the largest,and the change to yellow stained cotton grade 1 was the largest at the storage 6.0-7.0 *** addition,there were no significant changes in moisture regain,Micronaire value,upper half mean length,length uniformity index and fiber strength.

关键词： Cotton Storage time Fiber quality Quality indicator Color grade

各向同性颗粒系统数量平衡方程直接矩积分求解法的研究

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化学反应工程与工艺 2006年第4期22卷 310-316页

作者：苏军伟顾兆林李云西安交通大学过程装备与控制工程系陕西西安710049 西安交通大学环境科学与技术系陕西西安710049

随着颗粒系统微观行为研究的深入,数量平衡方程越来越受到重视。一般数量平衡方程由于复杂难以得到解析解。比较数量平衡方程的求解方法—分组方法(CM)、矩方法(MOM)和在矩方法基础上发展起来的直接矩积分方法(DQMOM),发现DQMOM具有计... 详细信息

随着颗粒系统微观行为研究的深入,数量平衡方程越来越受到重视。一般数量平衡方程由于复杂难以得到解析解。比较数量平衡方程的求解方法—分组方法(CM)、矩方法(MOM)和在矩方法基础上发展起来的直接矩积分方法(DQMOM),发现DQMOM具有计算量小,容易和计算流体力学(CFD)耦合等优点。运用直接矩积分方法对各向同性系统的颗粒长大、聚并和破碎等微观行为进行模拟,对各向同性液固系统的颗粒长大行为模拟的结果与文献的解析解吻合较好,误差小于10-5,对于各向同性液固系统的颗粒聚并和破碎行为模拟的结果与CM方法的精确解相比误差在2%以内。可见直接矩积分求解法在液固多相系统是有效的,具有良好的应用前景。

关键词：直接矩积分方法数量平衡方程颗粒系统

以体积为内部坐标数量平衡模型的矩直接积分方法

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西安交通大学学报 2007年第5期41卷 621-624,630页

作者：苏军伟顾兆林李云西安交通大学能源与动力工程学院西安710049 西安交通大学人居环境与建筑工程学院西安710049

从体积为内部属性的数量平衡模型的一般形式出发,提出以体积为内部坐标的矩直接积分求解方法．该方法通过对实体数值密度分布引入高斯积分假设并进行矩变换,将颗粒固有属性从数值密度函数中分离出来,实现了实体属性及其实体分布的单独跟... 详细信息

从体积为内部属性的数量平衡模型的一般形式出发,提出以体积为内部坐标的矩直接积分求解方法．该方法通过对实体数值密度分布引入高斯积分假设并进行矩变换,将颗粒固有属性从数值密度函数中分离出来,实现了实体属性及其实体分布的单独跟踪,从而降低了计算量．对各向同性系统的实体聚并、破碎和长大的模拟结果显示,该方法精度较高、计算量小．由于实体的数目及其体积在跟踪范围内,该方法具有数目和体积的自守恒性．以体积为内部属性的特点使其能够自动跟踪体积矩,从而使得该方法更适合描述结晶系统的沉积现象．考虑到离散相中体积和质量的密切关系,该方法能够直接应用到不可压缩流动的化学反应的传质模拟过程．

关键词：离散相矩直接积分方法数量平衡模型