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Home » Strontium-deficient SrxCoO2–CoO2 nanotubes as a high ampacity and high conductivity material

Strontium-deficient SrxCoO2–CoO2 nanotubes as a high ampacity and high conductivity material

by INMAweb
13/12/2024
in Highlight
0
Publicaciones científicas 2

Strontium-deficient SrxCoO2–CoO2 nanotubes as a high ampacity and high conductivity material

Kankona Singha Roy, Simon Hettler, Raúl Arenal and Leela S. Panchakarla

Mater. Horiz., 2022, 9, 2115

DOI: 10.1039/d1mh01987b

Abstract: Continuous miniaturization of electronics demands the development of interconnectors with high ampacity and high conductivity, which conventional conductors such as copper and gold cannot offer. Here we report the synthesis of Sr-deficient misfit SrxCoO2–CoO2 nanotubes by a novel crystal conversion method and investigate their electrical properties. Bulk Sr6Co5O15 having a quasi-one-dimensional CoO6 polyhedral structure (face-sharing octahedron and trigonal prismatic CoO6 arranged in one-dimension) is converted to SrxCoO2–CoO2 nanotubes where CoO2 adopts a two-dimensional edge-sharing CoO2 layered structure in a basic hydrothermal process. Electrical properties measured on individual nanotubes demonstrate that these nanotubes are semiconducting with a conductivity of 1.28 × 104 S cm−1 and an ampacity of 109 A cm−2, which is the highest reported ampacity value to date of any inorganic oxide-based material. The nanotubes also show a breakdown power per unit channel length (P/L) of ∼38.3 W cm−1, the highest among the regularly used interconnect materials. The above results demonstrate that SrxCoO2–CoO2 nanotubes are potential building blocks for high-power electronic applications.

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