Advanced Materials Research Vol. 893

Abstract: In kogas paper they assume that the process of electronic get through the curvature of the square loop interference device adiabatic.Thats means the electronic will retain both dynamical spin phase and the geometrical berry phase when it get through the curvature of the interference device.But this is an ideal assumption,in the actual situation the electrons coherent state will change when it get through the curvature of the square loop interferometer. Through this papers calculation we can learn how electrons coherent state change when it get through the curvature.

Abstract: Solid oxide fuel cell (SOFC) is well known as power and heat generation device which converts chemical energy directly from fuel into electricity. SOFC operate at high temperature becomes obstacle for SOFC which reducing ionic conductivity material of current electrolyte, reduce lifetime of cell components, high fabrication cost, limited durability and performance issues. This introduce to environment pollution and decrease the SOFC lifetime. The fabrication of durability and stability composite cathode are comprised from mixing of perovskite La₀.₆Sr₀.₄CO₀.₂Fe₀.₈ (LSCF) powders with nanoscale ionically conducting ceramic electrolyte materials, SDC-carbonate (SDCc) was overcome this problems. Powder preparation and composite cathode fabrication must consider which as main factors in the development of durability and stability of LSCF-SDCc composite cathode. Powders must in nanoscale to enhance the conductivity and decrease the interfacial polarization resistance and the composite cathode should in nanoporous morphology for achieve high power density over than 500 h and remarkable durability. Calcination also plays in important role and its operations will effects to the SOFC durability and performance. The necessary to prolong the lifetime and increase the SOFC performance has lead to development of durability and stability of SOFC. This paper reviews the durability and stability of the composite cathode and focus on the challenges in material technology.

Abstract: Chinas nuclear waste disposal is Developing country in the world in both technology and management mode, especially the spent fuel final disposal plan is the weaknesses. After a brief overview of the China nuclear waste disposal, the article focuses on analysis nuclear waste management experience. China model characteristics include perfect planning and system, the concept of absolute safety and requirements, and in the whole process of the public participation and dialogue. China model brings us a lot of valuable enlightenment for nuclear waste disposal and management in other country.

Abstract: DC-DC buck converter has been more widely used in automotive electronics because of its advantage of high efficiency and small size. However, it is one of the main causes of the conducted emission and radiation noise. The working principle and the mechanism of DC-DC buck converter which generate conducted emission and radiation noise in different frequency were analyzed. Then, two methods were proposed to reduce the low frequency radiated emission. One is weakening the AC current value of the inductor current through increasing the value of the output inductor, the other is reducing the loop area by adding the output filter, and both of the methods were verified by comparative test. Finally, the two schemes were used in designing the On-board controller, and it passed the radiated emissions (ALSE method) according to the international standard CISPR 25-2008.

Abstract: Diphenylamine and thiophene compounds are promising materials for organic light-emitting diodes (OLEDs). We report here, the synthesis and optical property of a novel small molecular weight derivative, N⁴.N⁴,N⁴'.N⁴'-tetrakis (4- (thiophen-2-yl) phenyl)-[1,1'-bipheny-4,4'-diamine (TPPA). The target molecule was synthesized using 4,4'-dibromobiphenyl as the starting material, and the proceeding reactions included bromination, Buchwald and Suzuki coupling reactions. According to the optical characterization of it, the absorption peak and excitation peak is at 351nm and 412 nm, respectively. The luminescence quantum yields (LQY) of TPPA is measured at 61.3%.

Abstract: sensor used in DC ground fault detection system according to measurement method can be divided into low frequency AC signal detecting and DC signal detecting of leakage current . It greatly affect the accuracy of the earth fault signal because of the existence of capacitance in the detecting of low frequency AC signal and it doesnt have online measurement DC current sensor in the market when we want to measure load leakage current. Caliper DC ammeter cant meet the requirements in DC system ground fault diction in terms of resolution, accuracy, range, on-line installation and on-line measurement.

Abstract: The most common method for solar cell installation is the inclining mounting method, this method can also be used with the bifacial solar cell. For the installation, its important to understand the properties of light which is entering the back surface of the bifacial solar cell. In this study, we measured the incidence light of the back surface of bifacial solar cell and compared its output power to the common single-surface solar cell to investigate the optimal condition for its installation in terms of (1) tilt angle, (2) height, (3) optimal region and (4) ground surface condition where the panel should be installed.

Abstract: In this paper, we present the backward-wave property in left-handed materials (LHM), where the permittivity and permeability are simultaneously less than zero. This property is theoretical proved by formula derivation. Then we presented a novel T-type structure LHM and its double negative property and backward-wave property are verified. We get the novel LHM and a coaxial feed rectangular microstrip antenna together and achieve the effect of backward-wave property on antenna by simulation. The results indicate that by using the LHM, the length of antenna could shorten.

Abstract: With the rapid development of electric vehicles, power battery market demand rapidly expanding, battery scrap and recycling has become a serious problem. Based on the analysis and forecast of waste battery amount from 2014 to 2024, the paper researched the future theoretical metal recycling amount of power battery in China. Life cycle assessment method is used to establish a waste lithium ion batteries and nickel-metal hydride batteries recycling process of environmental impact assessment model, and the data lists of recycling process are built. The environmental impact load are analyzed and compared. Through the establishment of economic analysis model of waste battery recycling process, the economic performance is quantified. To develop the recycling of waste power battery mode, laws, regulations and relevant technical standards for China^[, this paper provide the method reference and data support.

Abstract: Using an equivalent circuit model, the output characteristics of a bifacial photovoltaic solar module under various shaded conditions of the back side of the module were analyzed in detail. From the dark current-voltage (I-V) characteristics of bifacial photovoltaic solar cell, the diode parameters were extracted. The extracted diode parameters were applied to the equivalent circuit model for the bifacial photovoltaic solar module, and the solar-module performance was calculated. There was good agreement between the measured and calculated IV characteristics of the bifacial photovoltaic solar module under various shaded conditions.