Vertically Aligned and Ordered Arrays of 2D MCo2S4@Metal with Ultrafast Ion/Electron Transport for Thickness-Independent Pseudocapacitive Energy Storage

ACS Nano ◽  
2020 ◽  
Vol 14 (10) ◽  
pp. 12719-12731
Author(s):  
Zongbin Hao ◽  
Xingchen He ◽  
Hongdou Li ◽  
Denis Trefilov ◽  
Yangyang Song ◽  
...  
Keyword(s):  
Energy Storage ◽  
Electron Transport ◽  
Ordered Arrays ◽  
Vertically Aligned ◽  
Thickness Independent

Ordered Arrays of Vertically Aligned [110] Silicon Nanowires by Suppressing the Crystallographically Preferred Etching Directions

Nano Letters ◽  
2009 ◽  
Vol 9 (7) ◽  
pp. 2519-2525 ◽  
Author(s):  
Zhipeng Huang ◽  
Tomohiro Shimizu ◽  
Stephan Senz ◽  
Zhang Zhang ◽  
Xuanxiong Zhang ◽  
...  
Keyword(s):  
Silicon Nanowires ◽  
Ordered Arrays ◽  
Vertically Aligned

Characterization of an Air-PCM Energy Storage Design for Air Handling Unit Applications

2017 ◽  
Author(s):  
Sarah Wert ◽  
Cynthia A. Cruickshank ◽  
Dominic Groulx
Keyword(s):  
Heat Transfer ◽  
Energy Storage ◽  
Testing Temperature ◽  
Storage Device ◽  
Flow Rates ◽  
Transfer Rates ◽  
Melting Temperatures ◽  
Air Handling Unit ◽  
Vertically Aligned

This paper will discuss the characterization of an air-PCM storage design for commercial air handling unit (AHU) applications during winter. The air-PCM storage design consists of two rows of 29 aluminum flat plate containers (0.45 m × 0.35 m × 0.01 m) filled with PCM, vertically aligned leaving an air channel between each plate of 0.011 m wide. The storage device was placed within a closed air loop which conditions the air to the desired testing temperature and velocity. The PCM selected for testing was RT44HC with a melting temperature of 44 °C. This PCM was chosen for its similar properties to other PCMs having lower melting temperatures (in the range of 5 to 18°C) that could be used in actual HVAC application implementation. The system was instrumented and calibrated with Type T thermocouples and a velocity sensor. The system was tested at various inlet temperatures (55°C to 63°C for charging and 12°C to 25°C for discharging) and flow rates. The instantaneous heat transfer rates and total energy storage were calculated for each test from the data collected. The results provide a baseline value for heat transfer rates in a simple air-PCM design, to be used for model validation.

Growing ordered arrays of vertically aligned copolymer nanowires for supercapacitors with high stability

2017 ◽  
Vol 21 (11) ◽  
pp. 3121-3127 ◽  
Author(s):  
Ming Qian ◽  
Nan Chen ◽  
Min Liu ◽  
Liang Cheng ◽  
Jing Li ◽  
...  
Keyword(s):  
High Stability ◽  
Ordered Arrays ◽  
Vertically Aligned

Thickness dependence of electron transport in pure a-Se photoconductive films

2014 ◽  
Vol 92 (7/8) ◽  
pp. 629-633 ◽  
Author(s):  
Derek Mortensen ◽  
George Belev ◽  
Kirill (Cyril) Koughia ◽  
Robert E. Johanson ◽  
S.O. Kasap
Keyword(s):  
Thin Films ◽  
Electron Transport ◽  
Electric Field ◽  
Density Of States ◽  
Electron Mobility ◽  
Constant Electric Field ◽  
Thickness Dependence ◽  
The Other ◽  
Electron Lifetime ◽  
Thickness Independent

Electron transport in vacuum-deposited a-Se films with thicknesses varying from 13 to 501 μm has been investigated by conventional time-of-flight (TOF) and interrupted field TOF experiments. To separate the influences of electric field and the thickness, all TOF experiments were performed at a constant electric field. It has been found that the electron mobility is relatively constant in thick films (L > 50 μm) and increases in thinner films (L < 50 μm) with decreasing thickness. On the other hand, the electron lifetime is relatively thickness independent in films with thickness L > 50 μm, but drops sharply in thin films when L < 50 μm. These observations can be explained based on the density of states model that includes three types of traps forming Gaussian-like distributions within the mobility gap as reported in Koughia et al. (J. Appl. Phys. 97, 033706 (2005)).

Heat Transfer in Vertically Aligned Phase Change Energy Storage Systems

1999 ◽  
Vol 121 (2) ◽  
pp. 98-109 ◽  
Author(s):  
H. T. El-Dessouky ◽  
W. S. Bouhamra ◽  
H. M. Ettouney ◽  
M. Akbar
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Natural Convection ◽  
Energy Storage ◽  
Phase Change ◽  
Transfer Coefficient ◽  
Storage Systems ◽  
Flow Direction ◽  
Vertically Aligned ◽  
Bottom To Top

Convection effects on heat transfer are analyzed in low temperature and vertically aligned phase change energy storage systems. This is performed by detailed temperature measurements in the phase change material (PCM) in eighteen locations forming a grid of six radial and three axial positions. The system constitutes a double pipe configuration, where commercial grade paraffin wax is stored in the annular space between the two pipes and water flows inside the inner pipe. Vertical alignment of the system allowed for reverse of the flow direction of the heat transfer fluid (HTF), which is water. Therefore, the PCM is heated from the bottom for HTF flow from bottom to top and from the top as the HTF flow direction is reversed. For the former case, natural convection affects the melting process. Collected data are used to study variations in the transient temperature distribution at axial and radial positions as well as for the two-dimensional temperature field. The data is used to calculate the PCM heat transfer coefficient and to develop correlations for the melting Fourier number. Results indicate that the PCM heat transfer coefficient is higher for the case of PCM heating from bottom to top. Nusselt number correlations are developed as a function of Rayleigh, Stefan, and Fourier numbers for the HTF flow from bottom to top and as a function of Stefan and Fourier numbers for HTF flow from top to bottom. The enhancement ratio for heat transfer caused by natural convection increases and then levels off as the inlet temperature of the HTF is increased.

Ordered arrays of vertically aligned Au-nanotubes grafted with flocky Au/Ag-nanospikes based on electrodeposition and subsequent redox reaction

2015 ◽  
Vol 60 ◽  
pp. 104-108 ◽  
Author(s):  
Chao Hou ◽  
Guowen Meng ◽  
Zhulin Huang ◽  
Bin Chen ◽  
Chuhong Zhu ◽  
...  
Keyword(s):  
Redox Reaction ◽  
Ordered Arrays ◽  
Vertically Aligned
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