Co-sintering anode and Y2O3 stabilized ZrO2 thin electrolyte film for solid oxide fuel cell fabricated by co-tape casting

Fabricating a large-area unit cell is very important for the development of solid oxide fuel cell (SOFC) stack. In this study, details of sintering process of half cell with NiO-yttria stabilized zirconia (YSZ) anode-supported YSZ thin electrolyte film fabricated by co-tape casting have been discussed. The results demonstrates that the shrinkages and shrinking rates mismatches between the electrolyte and the anode can be controlled by the organic additive content in the anode slurry composition and heating rate. Low heating rate suppresses the cracks formation in the electrolyte films. A warp-free unit cell with size of 100 × 100 mm² and dense electrolyte has been successfully fabricated. A power of 22.2 W, with a power density of 0.27 W cm⁻² has been achieved at 0.7 V and 750 °C in O₂/humidified H₂ atmosphere. The area specific resistance of the cell is 1.20 Ω cm² at 0.7 V and 750 °C.     

Improved performance of ammonia-fueled solid oxide fuel cell with SSZ thin film electrolyte and Ni-SSZ anode functional layer

Ammonia offers several advantages over hydrogen as an alternative fuel. However, using ammonia as a hydrogen source for fuel cells has not been received enough attention. In present paper, Scandia-stabilized Zirconia (SSZ) thin film electrolyte and Ni-SSZ anode functional layer were developed by tape casting in order to obtain high power output performance in ammonia, the results of a SOFC running on ammonia were described and its performance was compared with that when running on hydrogen. In order to improve the performance of the cell at higher temperatures, the anode was modified by iron through infiltration. A direct comparison of the performance of the modified cell running on either hydrogen or ammonia showed that the cell in ammonia generated slightly higher power densities at 700 and 750 °C. The performance in ammonia, using the anode catalyst, was comparable to that in hydrogen indicating ammonia could be treated as a promising alternative fuel by selecting an appropriate catalyst.     

Research on intelligent launching control of dual clutch transmissions based on adaptive neural fuzzy inference system

Vehicle launching has an important influence on driving performance of the vehicle. For vehicles with dual clutch transmissions (DCT), the clutch torque control is the key to the launching control. Therefore, a data-driven control method for DCT launching process based on adaptive neural fuzzy inference system (ANFIS) is proposed. Firstly, the vehicle test data during launching process is collected and the optimal clutch torque is obtained based on multi-objective particle swarm optimization (MOPSO). Afterward, to learn the launching control rules from optimization results, the combination of neural network and fuzzy logic algorithm, referred to as an ANFIS, is established. The dataset of the optimized launching clutch torque is utilized to train the ANFIS controller. Finally, the simulation and test results show that the data-driven control can accurately learn the launching control rules from the optimality, thereby achieving the optimal control for different launching intentions.

     

Fabrication and performance of La0.8Sr0.2MnO3/YSZ graded composite cathodes for SOFC

The performance of multi-layer (1 − x) La_0.8Sr_0.2MnO₃/x YSZ graded composite cathodes was studied as electrode materials for intermediate solid oxide fuel cells (SOFC). The thermal expansion coefficient, electrical conductivity, and electrochemical performance of multi-layer composite cathodes were investigated. The thermal expansion coefficient and electrical conductivity decreased with the increase in YSZ content. The (1 -x)La_0.8Sr_0.2MnO₃/x YSZ composite cathode greatly increased the length of the active triple phase boundary line (TPBL) among electrode, electrolyte, and gas phase, leading to a decrease in polarization resistance and an increase in polarization current density. The polarization current density of the triple-layer graded composite cathode (0.77 A/cm²) was the highest and that of the monolayer cathode (0.13 A/cm²) was the lowest. The polarization resistance (R_p) of the triple-layer graded composite cathode was only 0.182 ω·cm² and that of the monolayer composite cathode was 0.323 ω·cm². The power density of the triple-layer graded composite cathode was the highest and that of the monolayer composite cathode was the lowest. The triple-layer graded composite cathode had superior performance.     

南通市通州区地表产流对气象要素和土地利用变化的响应

气象要素和土地利用变化是影响南通市通州区地表产流量的两大关键因素,对地表产流量变化进行定量归因计算,有助于理解这两者的具体影响机制。本文基于通州区1970—2020年的气象数据和土地利用数据,通过构建平原河网产流模型并制定不同情景设计方案,量化了气象要素和土地利用变化对区域内地表产流量的影响。结果表明：(1)平原河网产流模型能够较好地模拟通州区地表产流过程,率定期及验证期的纳什效率系数NSE大于0.88,确定性系数R²大于0.90。(2)1970—2020年通州区地表产流量整体呈显著上升趋势,1980 s、1990 s、2000 s和2010 s四个年代相较于1970 s依次增加了0.33亿m³、0.72亿m³、0.69亿m³和1.78亿m³。(3)1970—2020年,不同研究时段气象要素和土地利用变化对地表产流变化的贡献率差异较大,气象要素对地表产流变化的贡献率高于土地利用。在1980 s、1990 s、2000 s和2010 s四个研究时段内,气象要素对地表产流增加的贡献率分别为90.9%、84.7%、60.9%和79.8%,土地利用变化对地表产流增加的贡献率分别为9.1%、15.3%、39.1%和20.2%。研究结果可为区域内的水资源保护、规划与管理提供科学理论和决策依据。     

海岛海水淡化可再生能源管理系统的开发与应用

针对我国海岛淡水资源匮乏,常规能源供应不便等问题,设计开发了一套海岛适用的海水淡化可再生能源管理系统,并成功应用于广东某海岛100 t/d反渗透海水淡化示范工程中。运行结果表明:系统实现了各种资源的最佳匹配和高效利用,同时具备智能化程度高,运行稳定安全等优点,为解决海岛地区的能源供应与水资源短缺的难题提供了技术保障。文中对系统硬件配置和软件开发进行了详细阐述。     

6 000 t/d水泥生产线窑尾钢结构框架安装防护措施介绍

水泥熟料生产线窑尾钢结构框架是水泥厂建设项目中标志性建筑物,施工周期长、作业高度高、交叉作业多、施工危险性大,容易发生安全事故。本文以某6000t/d新型干法生产线窑尾钢结构框架为例,探讨了窑尾钢结构框架安装防护的安全措施。通过实际施工过程中的检验,安全生产绩效显著。     

海水淡化远程数据采集及监测系统的设计与应用

为满足海水淡化工程信息化管理需求,该文设计了一套远程数据采集及监测系统。系统包括数据采集端和远程监测端,数据采集端具有多通道采集、存储、显示及网络传输功能,远程监测端具有显示分析功能。将该系统应用于某海岛100 t/d海水淡化工程,运行结果表明:系统误差率小、实时性高、可靠性好,能够精确采集和传输现场数据,实时监测工程状况。     

Tailor-made gold brush nanoelectrode ensembles modified with l-cysteine for the detection of daunorubicine

A new functionalized l-cysteine surface modified 3D gold brush nanoelectrode assembly BNEE (l-cys/BNEEs) was prepared. The BNEEs consisted of gold nanowires 100 nm in diameter and up to 400 nm in length fabricated by template synthesis in track etched polycarbonate membranes. The nanowires were exposed by controlled chemical etching of the membrane and were then modified by coating l-cys on the surface of the exposed gold nanowires. The morphology of the BNEEs was imaged by scanning electron microscopy and the real active area of BNEEs was determined by electrochemical impedance spectroscopy. The redox of daunorubicine (DNR) at the l-cys/BNEEs exhibited absorption-controlled characteristics and higher current activity than that at l-cys surface modified 2D disk NEEs (l-cys/DNEEs). The square wave voltammetry technique was employed to detect DNR. The detection limit was 1.0 × 10⁻⁸ M (s/n = 3). The linear detection concentration range of DNR was from 2.5 × 10⁻⁸ to 4.0 × 10⁻⁷ M.     

Preparation of acid-resistant core/shell Fe3O4@C materials and their use as catalyst supports

Core/shell materials with a movable Fe₃O₄ core and a carbon shell were prepared using polypyrrole as carbon precursor. They are good candidates as metal catalyst supports due to their magnetic property and large surface area. The outer carbon shell thickness could be well-controlled. In addition, the Fe₃O₄@C materials displayed good resistance to acids, which would greatly extend their range of use. Because nitrogen atoms originating from pyrrole rings still remained in the carbon shell after calcination, Pd nanoparticles could be anchored on the surface without aggregation. The Fe₃O₄@C/Pd materials showed excellent catalytic performance in the reduction of methylene blue with sodium borohydride as reducing agent. The catalysts could be easily recycled by an external magnetic field and reused without obvious activity loss.