scholarly journals Low-current field-assisted assembly of copper nanoparticles for current collectors

2015 ◽  
Vol 181 ◽  
pp. 383-401 ◽  
Author(s):  
Lehao Liu ◽  
Bong Gill Choi ◽  
Siu On Tung ◽  
Tao Hu ◽  
Yajie Liu ◽  
...  
Keyword(s):  
Charge Transport ◽  
Surface Area ◽  
Copper Nanoparticles ◽  
Self Assembly ◽  
Electrode Materials ◽  
High Surface ◽  
High Surface Area ◽  
Active Electrode ◽  
Current Collectors ◽  
Self Assembled

Current collectors are essential features of batteries and many other electronic devices being responsible for efficient charge transport to active electrode materials. Three-dimensional (3D), high surface area current collectors considerably improve the performance of cathodes and anodes in batteries, but their technological implementation is impeded by the complexity of their preparation, which needs to be simple, fast, and energy efficient. Here we demonstrate that field-stimulated assembly of ∼3 nm copper nanoparticles (NPs) enables the preparation of porous Cu NP films. The use of NP dispersions enables 30× reduction of the deposition current for making functional 3D coatings. In addition to high surface area, lattice-to-lattice connectivity in the self-assembly of NPs in 3D structures enables fast charge transport. The mesoscale dimensions of out-of-plane features and the spacing between them in Cu films made by field-stimulated self-assembly of NPs provides promising morphology for current collection in lithium ion batteries (LIBs). Half-cell electrochemical models based on self-assembled films show improved specific capacity, total capacity, and cycling performance compared to traditional flat and other 3D current collectors. While integration of active electrode material into the 3D topography of the current collector needs to be improved, this study indicates that self-assembled NP films represent a viable manufacturing approach for 3D electrodes.

Unveiling General Rules Governing Dimensional Evolution of Branched TiO2 and Impacts on Photo-electrochemical Behaviours

2021 ◽  
Author(s):  
Teera Butburee ◽  
Yang Bai ◽  
Lianzhou Wang
Keyword(s):  
Titanium Dioxide ◽  
Energy Conversion ◽  
Charge Transport ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
General Rules ◽  
Branched Nanostructures

Branched nanostructures represent a unique group of nanoarchitectures exhibiting advantageous high surface area and excellent charge transport for energy conversion application compared to their bulk counterparts. Especially, branched titanium dioxide...

Rich N/O/S co-doped porous carbon with a high surface area from silkworm cocoons for superior supercapacitors

2019 ◽  
Vol 43 (48) ◽  
pp. 19372-19378 ◽  
Author(s):  
Jianyu Huang ◽  
Simin Liu ◽  
Zifang Peng ◽  
Zhuoxian Shao ◽  
Yuanyuan Zhang ◽  
...  
Keyword(s):  
Surface Area ◽  
Porous Carbon ◽  
Electrode Materials ◽  
Synergistic Effects ◽  
High Surface ◽  
High Surface Area ◽  
Porous Carbons ◽  
Co Doped

The synergistic effects of high surface area and abundant heteroatoms make porous carbons superior electrode materials.

scholarly journals Synthesis of Hierarchical Graphene-MnO2 Nanowire Composites with Enhanced Specific Capacitance

2019 ◽  
Vol 31 (8) ◽  
pp. 1709-1718
Author(s):  
T. Veldevi ◽  
K. Thileep Kumar ◽  
R.A. Kalaivani ◽  
S. Raghu ◽  
A.M. Shanmugharaj
Keyword(s):  
Surface Area ◽  
Electrode Materials ◽  
High Surface ◽  
Specific Capacity ◽  
High Surface Area ◽  
Rate Capability ◽  
Sulfate Solution ◽  
High Rate ◽  
Chemical Compositions ◽  
Structure Morphology

Hierarchical nanostructured graphene–manganese dioxide nanowire (G-MnO2-NW) composites have been prepared by hydrothermal synthesis route using water/1-decanol as the medium. Synthesized materials were analyzed using various characterization tools to corroborate their chemical compositions, structure/morphology and surface area. Electrochemical measurements of the synthesized G-MnO2-NW electrode materials delivered the highest specific capacity (255 Fg-1), high rate capability and improved cycling stability at 0.5 Ag–1 in 1M sodium sulfate solution and this fact may be attributed to its high surface area and porosity. Moreover, synthesized G-MnO2-NW electrodes displayed better energy and power density, when compared to the MnO2-NW based electrodes.

Flexible nanoporous activated carbon for adsorption of organics from industrial effluents

Nanoscale ◽  
2021 ◽  
Author(s):  
Usama Zulfiqar ◽  
Nikolaos Kostoglou ◽  
Andrew Thomas ◽  
Claus Rebholz ◽  
Allan Matthews ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Organic Contaminants ◽  
High Surface ◽  
High Surface Area ◽  
Industrial Effluents ◽  
Self Assembled ◽  
Nanoporous Activated Carbon

This paper reports a study involving the formation of a self-assembled polymeric monolayer on the surface of a high surface area activated carbon to engineer its affinity towards organic contaminants....

Highly Uniform Self-Assembled Gold Nanoparticles over High Surface Area ZnO Nanorods as Catalysts

2014 ◽  
Vol 3 (10) ◽  
pp. M61-M64 ◽  
Author(s):  
Tarek M. Abdel-Fattah ◽  
Alex Wixtrom ◽  
Kai Zhang ◽  
Wei Cao ◽  
Helmut Baumgart
Keyword(s):  
Gold Nanoparticles ◽  
Surface Area ◽  
High Surface ◽  
Zno Nanorods ◽  
High Surface Area ◽  
Self Assembled ◽  
Highly Uniform

scholarly journals High Surface Area Nanoporous Graphitic Carbon Materials Derived from Lapsi Seed with Enhanced Supercapacitance

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 728 ◽  
Author(s):  
Lok Kumar Shrestha ◽  
Rekha Goswami Shrestha ◽  
Subrata Maji ◽  
Bhadra P. Pokharel ◽  
Rinita Rajbhandari ◽  
...  
Keyword(s):  
Surface Area ◽  
Current Density ◽  
Electrode Materials ◽  
Carbon Materials ◽  
High Surface ◽  
High Surface Area ◽  
Graphitic Carbon ◽  
High Rate ◽  
Surface Areas ◽  
Nanoporous Carbon Materials

Nanoporous activated carbon materials derived from agro-wastes could be suitable low-cost electrode materials for high-rate performance electrochemical supercapacitors. Here we report high surface area nanoporous carbon materials derived from Lapsi seed agro-waste prepared by zinc chloride (ZnCl2) activation at 700 °C. Powder X-ray diffraction (pXRD) and Raman scattering confirmed the amorphous structure of the resulting carboniferous materials, which also incorporate oxygen-containing functional groups as confirmed by Fourier transform infrared (FTIR) spectroscopy. Scanning and transmission electron microscopy (SEM and TEM) analyses revealed the granular, nanoporous structures of the materials. High-resolution TEM (HR-TEM) confirmed a graphitic carbon structure containing interconnected mesopores. Surface areas and pore volumes of the materials were found, respectively, in the ranges from 931 to 2272 m2 g−1 and 0.998 to 2.845 cm3 g−1, and are thus superior to commercially available activated carbons. High surface areas, large pore volumes and interconnected mesopore structures of these Lapsi seed-derived nanoporous carbon materials lead to their excellent electrochemical supercapacitance performance in aqueous electrolyte (1 M H2SO4) with a maximum specific capacitance of 284 F g−1 at a current density of 1 A g−1. Furthermore, the electrodes showed high-rate capability sustaining 67.7% capacity retention even at high current density of 20 A g−1 with excellent cycle stability achieving 99% capacitance retention even after 10,000 charge–discharge cycles demonstrating the potential of Lapsi seed derived nanoporous carbons as suitable electrode materials in high-performance supercapacitor devices.

In situ Self-Assembly of Zigzag Polyimide Chains to Crystalline Branched Supramolecular Structures with High Surface Area

2010 ◽  
Vol 211 (6) ◽  
pp. 698-705 ◽  
Author(s):  
Shaozhong Zeng ◽  
Limin Guo ◽  
Fangming Cui ◽  
Zhe Gao ◽  
Jian Zhou ◽  
...  
Keyword(s):  
Surface Area ◽  
Self Assembly ◽  
High Surface ◽  
High Surface Area ◽  
Supramolecular Structures
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