Compression and electromagnetic shielding properties of CNTs reinforced copper foams prepared through electrodeposition

Wang, Congzhen; Gan, Xueping; Tao, Jingmei; Xie, Ming; Yi, Jianhong; Liu, Yichun

doi:10.1016/j.vacuum.2019.06.006

Cited by 30 publications

(12 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has been mentioned in most studies that copper foam (CF) can be used as electrode materials (carrier materials), catalyst carriers, and electromagnetic shielding materials. [ 18 ] Herein, copper foam is used as the Cu source and growth sites to in situ grow CuO nanoarrays for electrocatalysis, and a monolithic CuO@CoOOH p‐n heterojunction has been constructed on 3D conductive CF for enhanced OER electrocatalysis in alkaline media through controlled solvothermal route and in situ anodic oxidation process. Experimental and theoretical simulation results indicate that in this p‐n heterojunction, the positive charged n‐type CoOOH becomes more conducive to the adsorption of OH − and the adsorbed sulfate ions released during the in‐situ anodic oxidation process also contributes to the electrocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Improved Interface Charge Transfer and Redistribution in CuO‐CoOOH p‐n Heterojunction Nanoarray Electrocatalyst for Enhanced Oxygen Evolution Reaction

et al. 2021

View full text Add to dashboard Cite

Electron density modulation is of great importance in an attempt to achieve highly active electrocatalysts for the oxygen evolution reaction (OER). Here, the successful construction of CuO@CoOOH p-n heterojunction (i.e., p-type CuO and n-type CoOOH) nanoarray electrocatalyst through an in situ anodic oxidation of CuO@CoS x on copper foam is reported. The p-n heterojunction can remarkably modify the electronic properties of the space-charge region and facilitate the electron transfer. Moreover, in situ Raman study reveals the generation of SO 4 2− from CoS x oxidation, and electron cloud density distribution and density functional theory calculation suggest that surface-adsorbed SO 4 2− can facilitate the OER process by enhancing the adsorption of OH − . The positively charged CoOOH in the space-charge region can significantly enhance the OER activity. As a result, the CuO@CoOOH p-n heterojunction shows significantly enhanced OER performance with a low overpotential of 186 mV to afford a current density of 10 mA cm −2 . The successful preparation of a large scale (14 × 25 cm 2 ) sample demonstrates the possibility of promoting the catalyst to industrial-scale production. This study offers new insights into the design and fabrication of non-noble metal-based p-n heterojunction electrocatalysts as effective catalytic materials for energy storage and conversion.

show abstract

Section: Introductionmentioning

confidence: 99%

Improved Interface Charge Transfer and Redistribution in CuO‐CoOOH p‐n Heterojunction Nanoarray Electrocatalyst for Enhanced Oxygen Evolution Reaction

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The CNTs embedded in the matrix can improve load transfer and enhance the performance of C‐AMCFs. [ 25,26 ] Under ball‐milling, CNTs are protected by a soft Al matrix and achieve a good bond with the Al matrix. But some CNTs are bent (Figure 3d) under repeated impacts.…”

Section: Resultsmentioning

confidence: 99%

Compression, Energy Absorption, and Electromagnetic Shielding Properties of Carbon Nanotubes/Al Composite Foams

Shao

Yang

et al. 2022

Adv Eng Mater

View full text Add to dashboard Cite

Herein, pre‐dispersed ball‐milling and space‐holder methods are used to prepare carbon nanotubes (CNTs) reinforced aluminum (Al) matrix composite foams (C‐AMCFs). Systematic research is conducted on the mechanical and electromagnetic shielding properties of C‐AMCFs as well as the optimal ball‐milling time. The results demonstrate a quasi‐linear relationship between CNTs contents and optimal ball‐milling time. With the addition of CNTs, the compressive performances of C‐AMCFs first increase and subsequently decrease. The 2.5 wt% C‐AMCFs have the best mechanical performance, whose yield strength (19.25 MPa), plateau stress (20.87 MPa), and energy absorption capacity (8.874 MJ m−3), are both 1.72, 1.72, and 1.79 times than those of AFs, respectively. In the X‐band (8.2–12.4 GHz), the addition of CNTs in C‐AMCFs can increase their electromagnetic shielding effectiveness. The greatest electromagnetic shielding effectiveness of the 2.0 wt% C‐AMCFs is 30–40 dB. By enhancing the reflection loss at the first interface as well as the absorption and reflection loss inside the cell walls, CNTs play an important role in improving the electromagnetic shielding performance of C‐AMCFs.

show abstract

“…Studies of EMI shielding materials mainly focus on metallic materials and conductive polymers. [5][6][7] However, the application of conductive polymers as EMI shielding materials is restricted by the characteristics of low mechanical properties and nonrecyclability. [8] Metallic materials have good electrical conductivity and show superior EMI shielding properties.…”

Section: Introductionmentioning

confidence: 99%

“…[8] Metallic materials have good electrical conductivity and show superior EMI shielding properties. [5,7] Among metallic materials, magnesium (Mg) alloys have drawn much attention in aerospace, automobile, and 3C fields due to their lightweight, high specific strength, good conductivity, and recyclability, and are regarded as potential EMI shielding materials. [9][10][11][12] The Mg-Zn alloy, one of wrought Mg alloys, has been widely studied by many researchers.…”

Section: Introductionmentioning

confidence: 99%

“…The EDS analyses of TEM indicate that the rod-like precipitates compose of Mg and Sn. Further analyzed by highresolution TEM (HRTEM) and selected area electron diffraction (SAED) pattern (Figure 3d), the rod precipitates are confirmed to be Mg 2 Sn, and the Mg 2 Sn uniformly dispersed on the basal plane of α-Mg. [23] The SAED image shows that Mg 2 Sn and Mg have OR as (220) Mg2Sn //(0002) Mg and [1][2][3][4][5][6][7][8][9][10][11] Mg2Sn // [11][12][13][14][15][16][17][18][19][20] Mg . Our previous study showed that Mg 2 Sn precipitates have two kinds of morphology, rods in prismatic planes and plates in basal planes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Improving Strength and Electromagnetic Shielding Effectiveness of Mg–Sn–Zn–Ca–Ce Alloy by Sn Addition

Chen

Luo

et al. 2021

Adv Eng Mater

View full text Add to dashboard Cite

The strength and electromagnetic shielding capability are two essential requirements for lightweight metallic materials as shielding materials. However, it is still a challenge to develop magnesium (Mg) alloys with both high strength and favorable electromagnetic shielding capability. Herein, the results show that alloying with Sn in Mg–xSn–Zn–Ca–Ce alloys simultaneously increases both strength and electromagnetic shielding effectiveness (SE). After Sn alloying, the average grain size of the alloys is greatly reduced, whereas the intensity of basal texture is enhanced, and the precipitation of Mg2Sn phase is promoted. The Mg–3Sn–Zn–Ca–Ce alloy attains best comprehensive mechanical properties and electromagnetic SE (ultimate tensile strength (UTS) of 337 MPa and SE of 91–114 dB) in Sn containing alloys. The increase in strength is attributed to the combination of grain refinement, texture strengthening, and precipitation strengthening. The great electromagnetic SE is mainly due to the regularly arranged Mg2Sn precipitates in the basal plane.

show abstract

Compression and electromagnetic shielding properties of CNTs reinforced copper foams prepared through electrodeposition

Cited by 30 publications

References 21 publications

Improved Interface Charge Transfer and Redistribution in CuO‐CoOOH p‐n Heterojunction Nanoarray Electrocatalyst for Enhanced Oxygen Evolution Reaction

Improved Interface Charge Transfer and Redistribution in CuO‐CoOOH p‐n Heterojunction Nanoarray Electrocatalyst for Enhanced Oxygen Evolution Reaction

Compression, Energy Absorption, and Electromagnetic Shielding Properties of Carbon Nanotubes/Al Composite Foams

Improving Strength and Electromagnetic Shielding Effectiveness of Mg–Sn–Zn–Ca–Ce Alloy by Sn Addition

Contact Info

Product

Resources

About