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磁制冷发展现状及趋势:Ⅱ磁制冷技术

低温工程 2001年第2期 57-63页

作者：陈远富陈云贵滕保华唐永柏付浩唐定骧涂铭旌四川大学金属材料工程系四川大学应用物理系成都610065 中科院长春应用化学研究所长春130022

简要介绍了磁制冷实现的原理 ,概括了磁制冷与气体压缩制冷的差异 ,比较了 4种磁制冷循环的优缺点及适用场合 ,重点评述了室温温区磁制冷样机的研究进展 ,分析了磁制冷的关键技术 ,最后给出了磁制冷的潜在市场并展望了发展趋势。

关键词：磁制冷机磁制冷循环工作原理卡诺循环制冷效率

APPLICATION OF SURROGATE BASED PARTICLE SWARM OPTIMIZATION TO THE RELIABILITY-BASED ROBUST DESIGN OF COMPOSITE PRESSURE VESSELS

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Acta Mechanica Solida Sinica 2013年第5期26卷 480-490页

作者： Jianqiao chen yuanfu Tang Xiaoxu Huang Department of Mechanics Hubei Key Laboratory of Engineering Structural Analysis and Safety AssessmentHuazhong University of Science and Technology

A surrogate based particle swarm optimization （SBPSO） algorithm which combines the surrogate modeling technique and particle swarm optimization is applied to the reliability- based robust design （RBRD） of composite pressure vessels. The algorithm and efficiency of SBPSO are displayed through numerical examples. A model for filament-wound composite pressure vessels with metallic liner is then studied by netting analysis and its responses are analyzed by using Finite element method （performed by software ANSYS）. An optimization problem for maximizing the performance factor is formulated by choosing the winding orientation of the helical plies in the cylindrical portion, the thickness of metal liner and the drop off region size as the design variables. Strength constraints for composite layers and the metal liner are constructed by using Tsai-Wu failure criterion and Mises failure criterion respectively. Numerical examples show that the method proposed can effectively solve the RBRD problem, and the optimal results of the proposed model can satisfy certain reliability requirement and have the robustness to the fluctuation of design variables.

关键词： structural optimization reliability based robust design composite pressure vessel,surrogate based particle swarm optimization sequential algorithm

A self-repairing polymer-inorganic composite coating to enable high-performance Zn anodes for zinc-ion batteries

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Chinese Chemical Letters 2023年第12期34卷 375-380页

作者： Weijing Wu yuanfu Deng Guohua chen The Key Laboratory of Fuel Cell for Guangdong Province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640China Electrochemical Energy Engineering Research Center of Guangdong Province South China University of TechnologyGuangzhou 510640China School of Energy and Environment City University of Hong KongHong Kong 999077China

There are some critical issues hindering the practical applications of aqueous zinc-ion batteries(zIBs),although they possess high safety and low cost as one of promising energy storge devices,such as the Zn dendrite growth and the by-product of Zn_(4)SO_(4)(OH)_(6)-xH_(2)O(ZHS)resulted from some side reactions in a mild ***,a compact and self-repairing solid electrolyte interface(SEl)film,as labeled the PVDF-Zn(TFSI)_(2)-ZHS coating[The PVDF and Zn(TFSI)_(2)are polyvinylidene fluoride and zinc bis(trifluoromethanesulfonyl)imide,respectively],which turns the in-situ generated ZHS into a beneficial ingredient onto the pre-coated PVDF-based composite coating layer containing Zn(TFSI)_(2),was designed and fabricated by a simple doctor blade *** is shown that the SEl layer can effectively isolate Zn from the electrolyte and homogenize the Zn^(2+)flux,and thus effectively suppress side reactions and dendrites *** from the hybrid SEl layer,a symmetric cell exhibits a high cycling stability over 750h at 2.0 mA/cm^(2)and 2.0 mAh/cm^(2),and meanwhile,a full-cell,coupled with K^(+) pre-intercalationα-MnO_(2)(KMO)cathode,displays excellent rate performance,stable coulombic efficiency and an acceptable cycle *** work provides a feasible approach for simple and scalable modification of Zn anodes to achieve high performance.

关键词： Self-repairing Polymer-inorganic composite coating PVDF Zn(TFSI)_(2) Znanodes Zn-ion batteries

LiF and LiNO_(3) as synergistic additives for PEO-PVDF/LLZTO-based composite electrolyte towards high-voltage lithium batteries with dualinterfaces stability

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Journal of Energy Chemistry 2022年第2期31卷 319-328页

作者： Liansheng Li yuanfu Deng Huanhuan Duan Yunxian Qian Guohua chen The Key Laboratory of Fuel Cell for Guangdong Province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640GuangdongChina Electrochemical Energy Engineering Research Center of Guangdong Province South China University of TechnologyGuangzhou 510640GuangdongChina Shenzhen CAPCHEM Technol Co Ltd. Shenzhen 518118GuangdongChina Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina

Solid electrolytes with desirable properties such as high ionic conductivity,wide electrochemical stable window,and suitable mechanical strength,and stable electrode-electrolyte interfaces on both cathode and anode side are essential for high-voltage all-solid-state lithium batteries(ASSLBs)to achieve excellent cycle *** this work,a novel strategy of using LiF and LiNO_(3) as synergistic additives to boost the performance of PEO-PVDF/LLZTO-based composite solid electrolytes(CSEs)is developed,which also promotes the assembled high-voltage ASSLBs with dual-interfaces stability ***,LiF as an inactive additive can increase the electrochemical stability of the CSE under high cut-off voltage,and improve the high-voltage compatibility between cathode and CSE,thus leading to a stable cathode/CSE ***_(3) as an active additive can lead to an enhanced ionic conductivity of CSE due to the increased free-mobile Li+and ensure a stable CSE/Li interface by forming stable solid electrolyte interphase(SEI)on Li anode *** from the improved performance of CSE and stable dualinterfaces,the assembled NCM622/9[PEO_(15)-LiTFSI]-PVDF-15 LLZTO-2 LiF-3 LiNO_(3)/Li cell delivers a high rate capacity of 102.1 mAh g^(-1) at 1.0 C and a high capacity retention of 77.4%after 200 cycles at 0.5 C,which are much higher than those of the ASSLB assembled with additive-free CSE,with only 60.0 mAh g^(-1) and 52.0%,***,novel cycle test modes of resting for 5 h at different charge states after every 5 cycles are designed to investigate the high-voltage compatibility between cathode and CSE,and the results suggest that LiF additive can actually improve the high-voltage compatibility of cathode and *** the obtained results confirm that the strategy of using synergistic additives in CSE is an effective way to achieve high-voltage ASSLBs with dual-interfaces stability.

关键词： Synergistic additives Composite solid electrolyte Dual-interfaces stability High-voltage cathode Lithium metal battery

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受TNT污染泛红的阳极氧化层环境试验研究

工程与试验 2017年第2期57卷 30-35页

作者：邹丞陈远富冯成良杜波黄锋重庆红宇精密工业有限责任公司重庆402760

某产品装填炸药过程中,由于保护不当,导致部分产品阳极氧化层受TNT炸药污染出现泛红现象。为了验证已被TNT炸药污染泛红阳极氧化层的环境适应性,特做环境试验验证。按GJB150A-2009对受TNT污染泛红的阳极氧化层试片进行了环境试验,试验... 详细信息

某产品装填炸药过程中,由于保护不当,导致部分产品阳极氧化层受TNT炸药污染出现泛红现象。为了验证已被TNT炸药污染泛红阳极氧化层的环境适应性,特做环境试验验证。按GJB150A-2009对受TNT污染泛红的阳极氧化层试片进行了环境试验,试验结果表明,受TNT污染泛红的阳极氧化层能够承受72h低温贮存(-45℃)、48h高温贮存(+65℃)、3个循环周期温度冲击(低温-45℃,高温+65℃)、10个循环周期湿热及交替进行的24h喷盐雾和24h干燥两种状态共96h试验的考核。

关键词： TNT 污染泛红阳极氧化层环境试验

Reliability design optimization of composite structures based on PSO together with FEA

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Chinese Journal of Aeronautics 2013年第2期26卷 343-349页

作者： chen Jianqiao Tang yuanfu Ge Rui An Qunli Guo Xiwei Department of Mechanics Huazhong University of Science and Technology Research and Development Center Wuhan Iron and Steel (Group) Corp.

The present work aims to develop a method for reliability-based optimum design of composite structures. A procedure combining particle swarm optimization （PSO） and finite element analysis （FEA） has been proposed. Numerical examples for the reliability design optimization （RDO） of a laminate and a composite cylindrical shell are worked out to demonstrate the effectiveness of the method. Then a design for composite pressure vessels is studied. The advantages and necessity of RDO over the conventional equi-strength design are addressed. Examples show that the proposed method has good stability and is efficient in dealing with the probabilistic optimal design of composite structures. It may serve as an effective tool to optimize other complicated structures with uncertainties.

关键词： Composite structures FEA PSO Reliability analysis Reliability design optimization

N,O co-doped porous carbon with rich pseudocapacitive groups exhibiting superior energy density in an acidic 2.4 V Li_(2)SO_(4)electrolyte

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Chinese Chemical Letters 2022年第8期33卷 3883-3888页

作者： Xiao Wang Kaixiang Zou Weijing Wu yuanfu Deng Guohua chen The Key Laboratory of Fuel Cell for Guangdong Province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640China Electrochemical Energy Engineering Research Center of Guangdong Province South China University of TechnologyGuangzhou 510640China Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHong KongChina

Designing a carbon material with a unique composition and surface functional groups for offering high specific capacity in a wide voltage window is of great significance to improve the energy density for the supercapacitor in a cheap and eco-friendly aqueous ***,we develop an efficient strategy to synthesize a N,O co-doped hierarchically porous carbon(NODPC-1.0)with moderate specific surface area and pore volume as well as rich heteroatoms using a deep eutectic solvent(DES)as an *** is found that NODPC-1.0 with a large proportion of pseudocapacitive functional groups(pyrrole-N,pyridineN and carbonyl-quinone)can work stable in an acidic 2 mol/L Li_(2)SO_(4)(pH 2.5)electrolyte,exhibiting specific capacities of 375 and 186 F/g at the current densities of 1.0 and 100 A/g,***,the assembled symmetric capacitor using the NODPC-1.0 as the active material and 2 mol/L acidic Li_(2)SO_(4)(pH 2.5)as the electrolyte shows an outstanding energy density of 74.4 Wh/kg at a high power density of 1.44 k W/kg under a broad voltage window(2.4 V).Relevant comparative experiments indicate that H+of the acidic aqueous electrolyte plays a crucial part in enhancement the specific capacity,and the abundant pseudocapacitive functional groups on the surface of the NODPC-1.0 sample play the key role in the improvement of electrochemical cycle stability under a broad voltage window.

关键词： Hierarchically porous carbon Acidic Li_(2)SO_(4)electrolyte N,O co-doped carbon Supercapacitor High work voltage

Ensemble Transform Sensitivity Method for Adaptive Observations

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Advances in Atmospheric Sciences 2016年第1期33卷 10-20页

作者： Yu ZHANG yuanfu XIE Hongli WANG Dehui chen Zoltan TOTH Nanjing University of Information Science and Technology Nanjing 210044 Chinese Academy of Meteorological Science Beijing 100081 Global Systems Division Earth System Research Laboratory NOAA Boulder CO 80305 USA Cooperative Institute for Research in the Atmosphere Colorado State University Fort Collins CO 80523 USA National Meteorological Centr Beijing 100081

The Ensemble Transform（ET） method has been shown to be useful in providing guidance for adaptive observation *** predicts forecast error variance reduction for each possible deployment using its corresponding transformation matrix in an ensemble *** this paper,a new ET-based sensitivity（ETS） method,which calculates the gradient of forecast error variance reduction in terms of analysis error variance reduction,is proposed to specify regions for possible adaptive *** is a first order approximation of the ET;it requires just one calculation of a transformation matrix,increasing computational efficiency（60%-80%reduction in computational cost）.An explicit mathematical formulation of the ETS gradient is derived and *** the ET and ETS methods are applied to the Hurricane Irene（2011） case and a heavy rainfall case for *** numerical results imply that the sensitive areas estimated by the ETS and ET are ***,ETS is much more efficient,particularly when the resolution is higher and the number of ensemble members is larger.

关键词： adaptive observation high impact weather ensemble transform

The synergistic effect of P-doping and carbon coating for boosting electrochemical performance of TiO_(2) nanospheres for sodium-ion batteries

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Chinese Chemical Letters 2021年第12期32卷 3847-3851页

作者： Zixing Guan Kaixiang Zou Xiao Wang yuanfu Deng Guohua chen The Key Laboratory of Fuel Cell for Guangdong Province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640China Electrochemical Energy Engineering Research Center of Guangdong Province South China University of TechnologyGuangzhou 510640China Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHong KongChina

P-doping is an effective way to modulate the electronic structure and improve the Na+diffusion kinetics of TiO_(2), enabling enhanced electrochemical performance. However, it is a challenge to prepare TiO;with a high P-doping concentration starting from TiO_(2)in a crystalline state. In this work, we design a novel two-step route for constructing a carbon-coated anatase P-doping TiO_(2)nanospheres(denote as(PAn TSS)@NC) with high P-doping concentration, by utilizing amorphous TiO;nanospheres with the ultrahigh specific area as P-doping precursor firstly, and followed by carbon coating treatment. Experimental results demonstrate that P is successfully doped into the crystal lattice and carbon layer is well coated on the surface of TiO_(2), with P-doping and carbon-coating contents of ~13.5 wt% and 10.4 wt%, respectively,which results in the enhanced pseudocapacitive behavior as well as favorable Na+and electron transferring kinetics. The(P-AnTSS)@NC sample shows excellent rate and cycle performance, exhibiting specific capacities of 177 and 115 m Ah/g at 0.1 and 1.0 A/g after 150 and 2000 cycles, respectively.

关键词： TiO_(2) Phosphorus-doping Carbon coating layer Anode material Sodium-ion batteries