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1. Proton conduction in doped ceria-carbonate composite electrolytes | |||
Zhao Yicheng | |||
Energy Science and Technology 30 April 2017 | |||
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Abstract: Doped ceria-carbonate composite is considered as a promising electrolyte for intermediate temperature solid oxide fuel cells. H+ conduction in the composite has attracted much attention in recent years, while its mechanism has not been revealed clearly. In this work, H+ conductivities of samarium doped ceria-carbonate composites with varying composition are measured by a four-probe direct current method. For composites with aggregated carbonate phase, H+ conductivity increases with the rise of carbonate content, while for composites with a more homogeneous distribution of phases, a larger interfacial region means higher H+ conductivity. We propose that H+ conducts through both the molten carbonate phase and the interfacial region. H+ conduction at the interface is influenced by the composition of the ceramic phase. | |||
TO cite this article:Zhao Yicheng . Proton conduction in doped ceria-carbonate composite electrolytes [OL].[30 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4727218 |
2. Oxygen ionic conduction in doped ceria-carbonate composite with a controllable structure | |||
ZHAO Yicheng | |||
Energy Science and Technology 24 April 2017 | |||
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Abstract: Doped ceria-carbonate composite with a high O2- conductivity has been considered as a promising electrolyte for solid oxide fuel cells, while the irregular distribution of its components leads to difficulties in investigating O2- conduction. In this work, samarium doped ceria-(Li0.52Na0.48)2CO3composite electrolyte is synthesized through a sacrificial NiOtemplate- infiltration method.The content and distribution of ceramic and carbonate phasesare controlled by varying the NiO content and the sintering temperature of SDC-NiO composite.Results of direct current four probe measurement show that molten carbonate dominatesO2- conduction in the composite. The tortuosity and inter-particle neck size of ceramic and carbonate phases, instead of the interface, present significant impact on the conductivity of O2-. | |||
TO cite this article:ZHAO Yicheng . Oxygen ionic conduction in doped ceria-carbonate composite with a controllable structure [OL].[24 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4727215 |
3. A new way to prepare MoO3/C for enhancing the electrochemical performance as anode for lithium ion battery | |||
YU Zhian,JIANG Hongying,GU Dawei,LI Jishu,WANG Lei,SHEN Linjiang | |||
Energy Science and Technology 17 March 2016 | |||
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Abstract:Composited molybdenum oxide and amorphous carbon (MoO3/C) as anode material for lithium ion batteries has been successfully synthesized by calcining polyaniline (PANI) doped with ammonium heptamolybdate tetrahydrate (AMo). The as-prepared electrode material was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and field emission scanning electron microscopy (FE-SEM). The electrochemical performance of the anode was investigated by galvanostatic charge/discharge, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). The MoO3/C shows higher capacity, better cyclic performance and rate performance than pristine MoO3. The electrochemical tests at different temperature were also conducted for investigating the temperature dependence of electrochemical performance for MoO3/C. The result indicates that the electrochemical performance at low temperature is mainly limited by the low kinetics of lithium ions diffusion and the high charge transfer resistance. | |||
TO cite this article:YU Zhian,JIANG Hongying,GU Dawei, et al. A new way to prepare MoO3/C for enhancing the electrochemical performance as anode for lithium ion battery[OL].[17 March 2016] http://en.paper.edu.cn/en_releasepaper/content/4680759 |
4. Improving the Electrochemical Performance of a Series of Electrospun LiNi1/3-xCo1/3Mn1/3+xO2 Samples | |||
Yun Zhang,Dawei Gu,Hongying Jiang,Hui Liu,Lei Wang,Linjiang Shen | |||
Energy Science and Technology 03 March 2016 | |||
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Abstract:A series of LiNi1/3-xCo1/3Mn1/3+xO2(x=0, 1/18, 1/15, and 1/12) cathode materials was successfully synthesized via electrospinning. The samples were characterized using X-ray diffraction, scanning electron microscopy, and electrical conductivity measurements. In addition, 2025-type coin cells containing LiNi1/3-xCo1/3Mn1/3+xO2 cathode materials were characterized using cyclic voltammetry and galvanostatic charge/discharge measurements. The Ni-Mn content (x) significantly affected the electrochemical properties of the electrospun samples, although electrospinning did not alter the samples' micromorphologies. The specific capacities, rate performances, cycle stabilities, and conductivities of the LiNi1/3-xCo1/3Mn1/3+xO2(0≤x≤1/15) samples increased with increasing x. The cation mixing of LiNi1/3-xCo1/3Mn1/3+xO2(0≤x≤1/15) was reduced when the Ni content decreased, indicating that the structural stability was enhanced. When x was increased further, the electrochemical performance of LiNi0.25Co0.33Mn0.42O2 was attenuated. The excess x value (x=1/12) in LiNi1/3-xCo1/3Mn1/3+xO2 prepared by electrospinning debases the structure stability possibly. | |||
TO cite this article:Yun Zhang,Dawei Gu,Hongying Jiang, et al. Improving the Electrochemical Performance of a Series of Electrospun LiNi1/3-xCo1/3Mn1/3+xO2 Samples[OL].[ 3 March 2016] http://en.paper.edu.cn/en_releasepaper/content/4679841 |
5. The SOC Estimation for power battery using KF method which parameters are updated by least square method | |||
Tong Meng,Pang Yingzhou,Tian Jiantao | |||
Energy Science and Technology 15 July 2014 | |||
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Abstract:In this article we first introduced some methods for estimating battery's SOC and their advantages and shortcomings respectively.Then with experimatal data,we proved that battery model 's parameters are time viriant.So fixed parameter Kalman Filter will not suitable, then we come up with a new estimating algorithm named adaptive Kalman Filter(APKF),which associates two algorithms-Kalman Fliter and Least Square method. Kalman Filer estiamtes SOC of battery,while Least Square method updatas parameters used in Kalman Filter.At last we used battery's discharging data to test whether this new alorithm takes effect. And the results produced by Ah-counting method was viewed as a reference because of constant current discharging situation. Then according to the estimating results, the results using produced by APKF has much smaller deviation than that produced by fixed parameters Kalman Flier. | |||
TO cite this article:Tong Meng,Pang Yingzhou,Tian Jiantao. The SOC Estimation for power battery using KF method which parameters are updated by least square method[OL].[15 July 2014] http://en.paper.edu.cn/en_releasepaper/content/4604285 |
6. OPTIMIZING ANTENNA STRUCTURE FOR ASPHALT MIXTURE RECYCLING BASED ON MICROWAVE HEATING | |||
Tongsheng Sun | |||
Energy Science and Technology 23 June 2014 | |||
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Abstract:In this pTo improve the uniformity of the temperature and electromagnetic fields of asphalt mixtures heated by microwave, the structure of a horn antenna is examined. The length and width of the feed waveguide are calculated as 85 and 55 mm, respectively, according to waveguide theory. The height of the antenna only slightly influences gain distribution according to the radiated electromagnetic field. The length-width ratio of the aperture plane of the antenna affects the uniformity of distribution of the electromagnetic field. When the ratio is the same as that of the feed waveguide, the gain of the electromagnetic field is the most evenly distributed. The farther the ratio deviates from that of the feed waveguide, the more intensively the electromagnetic field transmits. However, the simulation result indicates that the antenna with the most uniform distribution of electromagnetic field reflects the most energy. | |||
TO cite this article:Tongsheng Sun. OPTIMIZING ANTENNA STRUCTURE FOR ASPHALT MIXTURE RECYCLING BASED ON MICROWAVE HEATING[OL].[23 June 2014] http://en.paper.edu.cn/en_releasepaper/content/4601999 |
7. Ni-Co-B catalyst promoted Thermal Decomposition of Composite NaNH2-NaBH4 used as Hydrogen Storage Material | |||
BAI Ying,WU Feng,YANG Jianhu,WU Chuan,BAO Liying | |||
Energy Science and Technology 21 March 2014 | |||
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Abstract:NaNH2 and NaBH4 are structured as a composite hydrogen storage material, NaNH2-NaBH4. To improve the thermal decomposition kinetics of NaNH2-NaBH4, which is crucial to hydrogen releasing performance, Ni-Co-B is selected as a catalyst. To get the catalyst-promoted light-weight hydrogen storage materials, the composite hydrogen storage system was synthesized via a ball milling method with NaNH2, NaBH4 and Ni-Co-B. X-ray diffraction patterns show that the crystal structure of the NaNH2-NaBH4 is well kept after adding catalysts. In addition, Na3BN2 and metal Na are detected as a by-product in the Ni-Co-B promoted NaNH2-NaBH4 (2/1) through the thermal decomposition process. In addition, TG-DTA analysis indicates that the main decomposition stages of the metal boride promoted NaNH2-NaBH4 materials are split into three stages. Furthermore, the catalytic effects on the thermal decomposition kinetics are evaluated. The activation energy of the Ni-Co-B promoted NaNH2-NaBH4 below 250oC is 99KJ/mol, which are only 62.0% of that of the pristine NaNH2-NaBH4 (2/1), and implying better kinetics at low temperature decomposition range. | |||
TO cite this article:BAI Ying,WU Feng,YANG Jianhu, et al. Ni-Co-B catalyst promoted Thermal Decomposition of Composite NaNH2-NaBH4 used as Hydrogen Storage Material[OL].[21 March 2014] http://en.paper.edu.cn/en_releasepaper/content/4590679 |
8. Electric Field Analysis of AC Line Insulators by Symmetric Property | |||
LI Shiqiong,WANG Zezhong | |||
Energy Science and Technology 03 March 2014 | |||
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Abstract:The electric field of transmission lines insulators is open field. Open field calculation must demarcate the border. It's a boundary value problem. The calculation accuracy of open field is in contradiction to computational complexity. According to symmetry property analysis the computational complexity can be reduced. The real and imaginary parts of three-phase voltage phasors have symmetry property respectively. Based on the symmetry property and symmetrical structure of three-phase electric power system, the electric field computation module could be reduced to only 1/4 of the general model, so the computational complexity could be reduced greatly. In order to analyze the electric field distribution along the insulators, the computation module included insulators, transmission lines, tower, floor, and 90m interspaces around the insulators. The numerical calculation method was FEM. The calculation results were consistent with the factual electric field distribution. The method could be used for modeling of other three-phase electric field. The advantage of the model was the computational complexity was lower than other FEM with truncation boundary conditions, but the calculation accuracy was equal. | |||
TO cite this article:LI Shiqiong,WANG Zezhong. Electric Field Analysis of AC Line Insulators by Symmetric Property[OL].[ 3 March 2014] http://en.paper.edu.cn/en_releasepaper/content/4588011 |
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