Effect of Heat Treatment on the Microstructure and Performance of Cu Nanofoams Processed by Dealloying

Materials

Péter Jenei¹  Pham-Tran Hung¹  Jenő Gubicza¹  Ábel Szabó¹  Csilla Kádár¹  Gigap Han²  Heeman Choe²  Jae-Hun Kim²  Youngseok Song²  Dahye Park² 

[1] Department of Materials Physics, Eötvös Loránd University, P.O. Box 32, H-1518 Budapest, Hungary;School of Materials Science and Engineering, Kookmin University, 77 Jeongneung-ro, Seongbuk-gu, Seoul 02707, Korea;

关键词: dealloying;    Cu nanofoam;    heat treatment;    microstructure;    hardness;   

DOI  :  10.3390/ma14102691

来源: DOAJ

【 摘 要 】

Cu nanofoams are promising materials for a variety of applications, including anodes in high-performance lithium-ion batteries. The high specific surface area of these materials supports a high capacity and porous structure that helps accommodate volume expansion which occurs as batteries are charged. One of the most efficient methods to produce Cu nanofoams is the dealloying of Cu alloy precursors. This process often yields nanofoams that have low strength, thus requiring additional heat treatment to improve the mechanical properties of Cu foams. This paper provides the effects of heat treatment on the microstructures, mechanical properties, and electrochemical performance of Cu nanofoams. Annealing was conducted under both inert and oxidizing atmospheres. These studies ultimately reveal the underlying mechanisms of ligament coarsening during heat treatment.

【 授权许可】

Unknown