Elastocaloric cooling utilizes the latent heat associated with stress-induced reversible phase
transformations to achieve cooling. Currently, the key barrier to this technology is its
prohibitive cost due to the high elastocaloric material cost and the large stress required to
drive the cooling cycle. Vanadium (IV) oxide (VO 2) is a good candidate, and it is relatively
cheap. Our calorimetry study shows it exhibits a reversible phase transformation with a large
latent heat of 31.5 J/g as well as excellent functional stability. Its transformation temperature …