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|1. (WO2018161742) NANOPOROUS COPPER-ZINC-ALUMINUM SHAPE MEMORY ALLOY AND PREPARATION METHOD AND APPLICATION THEREOF|
|Applicants:||SOUTH CHINA UNIVERSITY OF TECHNOLOGY
|Title:||NANOPOROUS COPPER-ZINC-ALUMINUM SHAPE MEMORY ALLOY AND PREPARATION METHOD AND APPLICATION THEREOF|
The invention discloses a nanoporous copper-zinc-aluminum shape memory alloy, a preparation method and application thereof. The method comprises firstly mixing a pure copper billet, a pure zinc billet and a pure aluminum billet according to certain mass fractions, and obtaining a copper-zinc-aluminum alloy ingot by smelting; then spinning the obtained copper-zinc-aluminum alloy ingot by copper-roller rapid quenching under vacuum protection to obtain an ultra-thin CuZnAl mater alloy strip, and performing an etching treatment using a chloride ion-containing solution for an etching time of 10-300 minutes and at an etching temperature of 0-80°C to obtain a nanoporous Cu/CuZnAl material; and finally sealing the nanoporous CuZnAl material in a high vacuum quartz tube and performing a heat treatment, thereby obtaining a nanoporous copper-zinc-aluminum shape memory alloy having super-elasticity and a single-β phase at room temperature. The preparation method of the invention has high controllability, is applicable to the preparation of electrode materials of lithium-ion secondary batteries, and significantly improves cycle performance of the electrode materials.