Enlarging the surface area of an electrolytic capacitor of porous niobium by Mg Ce eutectic liquid dealloying

Kim, Joung Wook; Wada, Takeshi; Kim, Sung Gyoo; Kato, Hidemi

doi:10.1016/j.scriptamat.2016.05.014

Cited by 10 publications

(4 citation statements)

References 10 publications

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“…In an effort to overcome this limitation, Detsi et al derived an analytical expression for a direct computation of the specific surface area of NP materials. 78 Though useful, [79][80][81][82][83][84] this analytical model is only valid in specific situations where the size of ligaments and pores in NP metals are comparable. 78 An effective approach to characteristic size and specific surface areas of NP materials is needed, and SAXS can provide this information.…”

Section: Introductionmentioning

confidence: 99%

Small-angle X-ray scattering of nanoporous materials

Welborn

Detsi

2020

Nanoscale Horiz.

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Section: Introductionmentioning

confidence: 99%

Small-angle X-ray scattering of nanoporous materials

Welborn

Detsi

2020

Nanoscale Horiz.

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“…With a similar methodology to the examples discussed above, Kim et al fabricated NP-Nb with a Ni–Nb parent alloy by dissolving Ni into a Mg melt and then removing the solidified melt with 1 M HNO 3 . − A typical microstructure after dealloying is shown in Figure in the case of Ni 60 Nb 40 at.% immersed in a Mg melt at 1123 K for 300 s …”

Section: Fabrication Of Air- and Water-sensitive Nanoporous Metals An...mentioning

confidence: 99%

Dealloyed Air- and Water-Sensitive Nanoporous Metals and Metalloids for Emerging Energy Applications

Welborn

Detsi

2022

ACS Appl. Energy Mater.

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Nanoporous metals and metalloids are a broad class of materials whose fabrication involves the selective removal of one or more sacrificial elements from a parent alloy, also known as dealloying, which produces a bulk, monolithic framework with interconnected nanoscale ligaments and pores. The first reports within this field tended to focus on precious nanoporous metals (e.g., nanoporous gold) to provide an explanation of the fundamental mechanisms that underpin conventional, aqueous solution dealloying. As the community has grown, researchers have begun to explore various nonprecious metal and metalloid elements to expand the application space and versatility of nanoporous metals and metalloids. Air- and water-sensitive elements represent a particularly promising exploration for emerging energy applications; combining their chemical reactivity with the high specific surface area and unique morphology of nanoporous metals could enable significant advances in metal fuels for on-board hydrogen generation, next-generation battery electrodes, (electro)catalysts, and more. However, sensitivity to air and water imposes a significant fabrication barrier: The conventional aqueous solution dealloying approach either cannot create these materials at all or cannot create these materials without simultaneously forming a surface oxide film, which prevents them from being used in the applications mentioned above. To mitigate this issue, the community has developed several unique dealloying strategies involving various electrochemical, liquid metal, and thermal methods. In this review, we present those dealloying strategies and their reaction mechanisms, provide concrete examples of their fabrication and application in energy applications, and analyze their advantages and drawbacks with a focus on recyclability, complexity, and scalability.

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“…Since then, considerable literature has been published on the kinetics of the process and the application of this technique to dealloy materials that cannot be dealloyed electrochemically [ 19 , 20 ], for instance, Ti and refractory metals, which were previously inaccessible due to their relatively low surface mobilities [ 21 ]. To date, liquid metal dealloying has been used to make bicontinuous porous structures of Nb [ 22 , 23 , 24 ], Ti [ 25 ], C [ 26 ], stainless steel [ 27 ] and Co-based alloys [ 28 , 29 ]. Liquid metal dealloyed porous metals combine the electrical conductivity and wear resistance of their bulk counterparts with the high surface area of nanostructured materials and thus are envisioned for many applications in capacitors [ 22 ] and batteries [ 30 ].…”

Section: Dealloyingmentioning

confidence: 99%

Challenges and Opportunities for Integrating Dealloying Methods into Additive Manufacturing

Chuang

Erlebacher

2020

Materials

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The physical architecture of materials plays an integral role in determining material properties and functionality. While many processing techniques now exist for fabricating parts of any shape or size, a couple of techniques have emerged as facile and effective methods for creating unique structures: dealloying and additive manufacturing. This review discusses progress and challenges in the integration of dealloying techniques with the additive manufacturing (AM) platform to take advantage of the material processing capabilities established by each field. These methods are uniquely complementary: not only can we use AM to make nanoporous metals of complex, customized shapes—for instance, with applications in biomedical implants and microfluidics—but dealloying can occur simultaneously during AM to produce unique composite materials with nanoscale features of two interpenetrating phases. We discuss the experimental challenges of implementing these processing methods and how future efforts could be directed to address these difficulties. Our premise is that combining these synergistic techniques offers both new avenues for creating 3D functional materials and new functional materials that cannot be synthesized any other way. Dealloying and AM will continue to grow both independently and together as the materials community realizes the potential of this compelling combination.

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Enlarging the surface area of an electrolytic capacitor of porous niobium by Mg Ce eutectic liquid dealloying

Cited by 10 publications

References 10 publications

Small-angle X-ray scattering of nanoporous materials

Small-angle X-ray scattering of nanoporous materials

Dealloyed Air- and Water-Sensitive Nanoporous Metals and Metalloids for Emerging Energy Applications

Challenges and Opportunities for Integrating Dealloying Methods into Additive Manufacturing

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