Thermal batteries based on inverse barocaloric effects
Zhe Zhang, Zhe Zhang, Kuo Li, Shangchao Lin, Ruiqi Song, Dehong Yu, Yida Wang, Jingfan Wang, Shogo Kawaguchi, Zhao Zhang, Zhao Zhang, Chenyang Yu, Xiaodong Li, Jie Chen, Lunhua He, Richard A. Mole, Bao Yuan, Qingyong Ren, Kun Qian, Zhuangli Cai, Jingui Yu, Mingchao Wang, Changying Zhao, Xin Tong, Zhidong Zhang, Zhidong Zhang, Bing Li
Abstract
To harvest and reuse low-temperature waste heat, we propose and realize an emergent concept—barocaloric thermal batteries based on the large inverse barocaloric effect of ammonium thiocyanate (NH 4 SCN). Thermal charging is initialized upon pressurization through an order-to-disorder phase transition, and the discharging of 43 J g −1 takes place at depressurization, which is 11 times more than the input mechanical energy. The thermodynamic equilibrium nature of the pressure-restrained heat-carrying phase guarantees stable long-duration storage. The barocaloric thermal batteries reinforced by their solid microscopic mechanism are expected to substantially advance the ability to take advantage of waste heat.