Nanoengineering Energy Conversion and Storage Devices via Atomic Layer Deposition

2016 ◽  
Vol 6 (23) ◽  
pp. 1600468 ◽  
Author(s):  
Liaoyong Wen ◽  
Min Zhou ◽  
Chengliang Wang ◽  
Yan Mi ◽  
Yong Lei
Keyword(s):  
Atomic Layer Deposition ◽  
Energy Conversion ◽  
Atomic Layer ◽  
Storage Devices ◽  
Layer Deposition ◽  
Energy Conversion And Storage ◽  
And Storage

scholarly journals Modeling and optimization of atomic layer deposition processes on vertically aligned carbon nanotubes

2014 ◽  
Vol 5 ◽  
pp. 234-244 ◽  
Author(s):  
Nuri Yazdani ◽  
Vipin Chawla ◽  
Eve Edwards ◽  
Vanessa Wood ◽  
Hyung Gyu Park ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Atomic Layer Deposition ◽  
High Aspect Ratio ◽  
Atomic Layer ◽  
Storage Devices ◽  
Surface Areas ◽  
Layer Deposition ◽  
Energy Conversion And Storage ◽  
Vertically Aligned ◽  
Deposition Processes

Many energy conversion and storage devices exploit structured ceramics with large interfacial surface areas. Vertically aligned carbon nanotube (VACNT) arrays have emerged as possible scaffolds to support large surface area ceramic layers. However, obtaining conformal and uniform coatings of ceramics on structures with high aspect ratio morphologies is non-trivial, even with atomic layer deposition (ALD). Here we implement a diffusion model to investigate the effect of the ALD parameters on coating kinetics and use it to develop a guideline for achieving conformal and uniform thickness coatings throughout the depth of ultra-high aspect ratio structures. We validate the model predictions with experimental data from ALD coatings of VACNT arrays. However, the approach can be applied to predict film conformality as a function of depth for any porous topology, including nanopores and nanowire arrays.

Graphene, related two-dimensional crystals, and hybrid systems for energy conversion and storage

Science ◽  
2015 ◽  
Vol 347 (6217) ◽  
pp. 1246501 ◽  
Author(s):  
Francesco Bonaccorso ◽  
Luigi Colombo ◽  
Guihua Yu ◽  
Meryl Stoller ◽  
Valentina Tozzini ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Hybrid Systems ◽  
Dye Sensitized Solar Cells ◽  
Ionic Species ◽  
Two Dimensional ◽  
Storage Devices ◽  
Energy Needs ◽  
Energy Conversion And Storage ◽  
And Storage ◽  
Sensitized Solar Cells

Graphene and related two-dimensional crystals and hybrid systems showcase several key properties that can address emerging energy needs, in particular for the ever growing market of portable and wearable energy conversion and storage devices. Graphene’s flexibility, large surface area, and chemical stability, combined with its excellent electrical and thermal conductivity, make it promising as a catalyst in fuel and dye-sensitized solar cells. Chemically functionalized graphene can also improve storage and diffusion of ionic species and electric charge in batteries and supercapacitors. Two-dimensional crystals provide optoelectronic and photocatalytic properties complementing those of graphene, enabling the realization of ultrathin-film photovoltaic devices or systems for hydrogen production. Here, we review the use of graphene and related materials for energy conversion and storage, outlining the roadmap for future applications.

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