Inhibiting the growth of lithium dendrites at high current densities with oriented graphene foam

2018 ◽  
Vol 6 (32) ◽  
pp. 15603-15609 ◽  
Author(s):  
Yinxing Ma ◽  
Bowen Yao ◽  
Miao Zhang ◽  
Hua Bai ◽  
Gaoquan Shi
Keyword(s):  
Current Collector ◽  
High Current ◽  
Graphene Foam ◽  
Dendrite Formation ◽  
Lithium Dendrites ◽  
Current Densities ◽  
A Current

Oriented graphene foam performs well in inhibition of Li dendrite formation at 1, 2 and 5 mA cm−2 as a current collector.

scholarly journals Rendering Wood Veneers Flexible and Electrically Conductive through Delignification and Electroless Ni Plating

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3198 ◽  
Author(s):  
Minfeng Chen ◽  
Weijun Zhou ◽  
Jizhang Chen ◽  
Junling Xu
Keyword(s):  
Value Added ◽  
Current Collector ◽  
Carbon Cloth ◽  
Energy Storage Devices ◽  
Electrically Conductive ◽  
Graphene Foam ◽  
Storage Devices ◽  
Li Ion ◽  
Electroless Ni ◽  
A Current

Wood has unique advantages. However, the rigid structure and intrinsic insulating nature of wood limit its applications. Herein, a two-step process is developed to render wood veneers conductive and flexible. In the first step, most of the lignin and hemicellulose in the wood veneer are removed by hydrothermal treatment. In the second step, electroless Ni plating and subsequent pressing are carried out. The obtained Ni-plated veneer is flexible and bendable, and has a high tensile strength of 21.9 and 4.4 MPa along and across the channel direction, respectively, the former of which is considerably higher than that of carbon cloth and graphene foam. Moreover, this product exhibits high electrical conductivity around 1.1 × 103 S m−1, which is comparable to that of carbon cloth and graphene foam, and significantly outperforms previously reported wood-based conductors. This work reveals an effective strategy to transform cheap and renewable wood into a high value-added product that rivals expensive carbon cloth and graphene foam. The obtained product is particularly promising as a current collector for flexible and wearable electrochemical energy storage devices such as supercapacitors and Li-ion batteries.

Ultrafine oxygen-defective iridium oxide nanoclusters for efficient and durable water oxidation at high current densities in acidic media

2020 ◽  
Vol 8 (46) ◽  
pp. 24743-24751
Author(s):  
Zhipeng Yu ◽  
Junyuan Xu ◽  
Yifan Li ◽  
Bin Wei ◽  
Nan Zhang ◽  
...  
Keyword(s):  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
High Surface ◽  
High Surface Area ◽  
Current Collector ◽  
Cost Effective ◽  
High Current ◽  
Acidic Media ◽  
Cost Effective Approach ◽  
Current Densities

Ultrafine IrOx nanoclusters are immobilized on a hydrothermally treated high-surface-area titanium current collector via a simple and cost-effective approach, showing outstanding performance for the oxygen evolution reaction at high current densities in acidic media.

Visualization Study of CO2 Bubble Behavior in Passive Direct Methanol Fuel Cell

2012 ◽  
Vol 457-458 ◽  
pp. 98-101
Author(s):  
Xian Qi Cao ◽  
Ji Tian Han ◽  
Ze Ting Yu ◽  
Peng Cheng Dou ◽  
Pei Pei Chen
Keyword(s):  
Digital Camera ◽  
Current Collector ◽  
High Current ◽  
Bubble Behavior ◽  
Membrane Area ◽  
Direct Methanol ◽  
Current Densities ◽  
Temperature And Pressure ◽  
Parallel Current ◽  
Methanol Fuel Cell

In this work, a transparent passive DMFC was constructed to investigate the CO2bubble behavior in perforated current-collector (PECC) and parallel current-collector (PACC) by using a digital camera. Experiments were carried out in a passive DMFC with active membrane area of 9 cm2, working at ambient temperature and pressure. Results showed that small discrete bubbles appeared in PECC at low current densities; while the PECC was predominated by big bubbles at high current densities, which led to deterioration of methanol mass transfer. On the contrary, the PACC was more efficient to remove CO2bubbles than the PECC did. Therefore, it gained a better performance at high current densities.

Electromigration and IC Interconnects

MRS Bulletin ◽  
1993 ◽  
Vol 18 (12) ◽  
pp. 19-25 ◽  
Author(s):  
Carl V. Thompson ◽  
James R. Lloyd
Keyword(s):  
Integrated Circuit ◽  
Electronic Devices ◽  
High Current ◽  
Metallic Films ◽  
Si Substrate ◽  
Current Densities ◽  
Heat Sinking ◽  
Enormous Number ◽  
Good Heat ◽  
A Current

A modern integrated circuit (IC) is composed of 106 or more electronic devices. They are connected to form a circuit through the use of metallic films patterned into strips which function as wires to interconnect devices. These wires are usually simply referred to as interconnects. In an IC occupying the surface of a 1 cm2 Si chip, there can be 10 m of total interconnect length. This length is in the form of more than 106 line segments contacting pairs of devices and different segments of the circuit. This enormous number of wires is made possible by their small widths. Interconnect widths as small as 0.55 μm are currently used in commercial circuits, and circuits and processes leading to smaller and smaller widths are continuously in development.During operation of an IC, interconnects carry current densities as high as 4 × 105 A/cm2. This should be compared with a current density of 102 A/cm2, the maximum allowed for house wiring. Thin-film conductors can carry these high current densities only because of the relatively good heat sinking provided by the Si substrate.

Facet Topography and Dislocation Structure as a Possible Source for Electrical Heterogeneity in [001] TILT Bicrystals of YBa2Cu3O7-δ

1996 ◽  
Vol 54 ◽  
pp. 338-339
Author(s):  
I-Fei Tsu ◽  
D.L. Kaiser ◽  
S.E. Babcock
Keyword(s):  
Grain Boundary ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Electromagnetic Properties ◽  
Length Scale ◽  
Density Values ◽  
Current Densities ◽  
Applied Fields ◽  
A Current

A current theme in the study of the critical current density behavior of YBa2Cu3O7-δ (YBCO) grain boundaries is that their electromagnetic properties are heterogeneous on various length scales ranging from 10s of microns to ˜ 1 Å. Recently, combined electromagnetic and TEM studies on four flux-grown bicrystals have demonstrated a direct correlation between the length scale of the boundaries’ saw-tooth facet configurations and the apparent length scale of the electrical heterogeneity. In that work, enhanced critical current densities are observed at applied fields where the facet period is commensurate with the spacing of the Abrikosov flux vortices which must be pinned if higher critical current density values are recorded. To understand the microstructural origin of the flux pinning, the grain boundary topography and grain boundary dislocation (GBD) network structure of [001] tilt YBCO bicrystals were studied by TEM and HRTEM.

scholarly journals B‐Cu‐Zn gas diffusion electrodes for CO2 electroreduction to C2+ products at high current densities

2021 ◽  
Author(s):  
Yanfang Song ◽  
Joao R. C. Junqueira ◽  
Nivedita Sikdar ◽  
Denis Öhl ◽  
Stefan Dieckhöfer ◽  
...  
Keyword(s):  
Gas Diffusion ◽  
High Current ◽  
Gas Diffusion Electrodes ◽  
Co2 Electroreduction ◽  
Current Densities

scholarly journals B‐Cu‐Zn gas diffusion electrodes for CO2 electroreduction to C2+ products at high current densities

2021 ◽  
Author(s):  
Yanfang Song ◽  
Joao R. C. Junqueira ◽  
Nivedita Sikdar ◽  
Denis Öhl ◽  
Stefan Dieckhöfer ◽  
...  
Keyword(s):  
Gas Diffusion ◽  
High Current ◽  
Gas Diffusion Electrodes ◽  
Co2 Electroreduction ◽  
Current Densities
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