Colossal barocaloric effects in the complex hydride Li $$_{2}$$ 2 B $$_{12}$$ 12 H $$_{12}$$ 12
Abstract Traditional refrigeration technologies based on compression cycles of greenhouse gases pose serious threats to the environment and cannot be downscaled to electronic device dimensions. Solid-state cooling exploits the thermal response of caloric materials to changes in the applied external...
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Nature Portfolio
2021
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oai:doaj.org-article:5a9b7d5572db4118a8b9659d69f3f6442021-12-02T17:52:23ZColossal barocaloric effects in the complex hydride Li $$_{2}$$ 2 B $$_{12}$$ 12 H $$_{12}$$ 1210.1038/s41598-021-91123-42045-2322https://doaj.org/article/5a9b7d5572db4118a8b9659d69f3f6442021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-91123-4https://doaj.org/toc/2045-2322Abstract Traditional refrigeration technologies based on compression cycles of greenhouse gases pose serious threats to the environment and cannot be downscaled to electronic device dimensions. Solid-state cooling exploits the thermal response of caloric materials to changes in the applied external fields (i.e., magnetic, electric and/or mechanical stress) and represents a promising alternative to current refrigeration methods. However, most of the caloric materials known to date present relatively small adiabatic temperature changes ( $$|\Delta T| \sim 1$$ | Δ T | ∼ 1 to 10 K) and/or limiting irreversibility issues resulting from significant phase-transition hysteresis. Here, we predict by using molecular dynamics simulations the existence of colossal barocaloric effects induced by pressure (isothermal entropy changes of $$|\Delta S| \sim 100$$ | Δ S | ∼ 100 J K $$^{-1}$$ - 1 kg $$^{-1}$$ - 1 ) in the energy material Li $$_{2}$$ 2 B $$_{12}$$ 12 H $$_{12}$$ 12 . Specifically, we estimate $$|\Delta S| = 367$$ | Δ S | = 367 J K $$^{-1}$$ - 1 kg $$^{-1}$$ - 1 and $$|\Delta T| = 43$$ | Δ T | = 43 K for a small pressure shift of P = 0.1 GPa at $$T = 480$$ T = 480 K. The disclosed colossal barocaloric effects are originated by a fairly reversible order–disorder phase transformation involving coexistence of Li $$^{+}$$ + diffusion and (BH) $$_{12}^{-2}$$ 12 - 2 reorientational motion at high temperatures.Kartik SauTamio IkeshojiShigeyuki TakagiShin-ichi OrimoDaniel ErrandoneaDewei ChuClaudio CazorlaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021) |
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Medicine R Science Q Kartik Sau Tamio Ikeshoji Shigeyuki Takagi Shin-ichi Orimo Daniel Errandonea Dewei Chu Claudio Cazorla Colossal barocaloric effects in the complex hydride Li $$_{2}$$ 2 B $$_{12}$$ 12 H $$_{12}$$ 12 |
| description |
Abstract Traditional refrigeration technologies based on compression cycles of greenhouse gases pose serious threats to the environment and cannot be downscaled to electronic device dimensions. Solid-state cooling exploits the thermal response of caloric materials to changes in the applied external fields (i.e., magnetic, electric and/or mechanical stress) and represents a promising alternative to current refrigeration methods. However, most of the caloric materials known to date present relatively small adiabatic temperature changes ( $$|\Delta T| \sim 1$$ | Δ T | ∼ 1 to 10 K) and/or limiting irreversibility issues resulting from significant phase-transition hysteresis. Here, we predict by using molecular dynamics simulations the existence of colossal barocaloric effects induced by pressure (isothermal entropy changes of $$|\Delta S| \sim 100$$ | Δ S | ∼ 100 J K $$^{-1}$$ - 1 kg $$^{-1}$$ - 1 ) in the energy material Li $$_{2}$$ 2 B $$_{12}$$ 12 H $$_{12}$$ 12 . Specifically, we estimate $$|\Delta S| = 367$$ | Δ S | = 367 J K $$^{-1}$$ - 1 kg $$^{-1}$$ - 1 and $$|\Delta T| = 43$$ | Δ T | = 43 K for a small pressure shift of P = 0.1 GPa at $$T = 480$$ T = 480 K. The disclosed colossal barocaloric effects are originated by a fairly reversible order–disorder phase transformation involving coexistence of Li $$^{+}$$ + diffusion and (BH) $$_{12}^{-2}$$ 12 - 2 reorientational motion at high temperatures. |
| format |
article |
| author |
Kartik Sau Tamio Ikeshoji Shigeyuki Takagi Shin-ichi Orimo Daniel Errandonea Dewei Chu Claudio Cazorla |
| author_facet |
Kartik Sau Tamio Ikeshoji Shigeyuki Takagi Shin-ichi Orimo Daniel Errandonea Dewei Chu Claudio Cazorla |
| author_sort |
Kartik Sau |
| title |
Colossal barocaloric effects in the complex hydride Li $$_{2}$$ 2 B $$_{12}$$ 12 H $$_{12}$$ 12 |
| title_short |
Colossal barocaloric effects in the complex hydride Li $$_{2}$$ 2 B $$_{12}$$ 12 H $$_{12}$$ 12 |
| title_full |
Colossal barocaloric effects in the complex hydride Li $$_{2}$$ 2 B $$_{12}$$ 12 H $$_{12}$$ 12 |
| title_fullStr |
Colossal barocaloric effects in the complex hydride Li $$_{2}$$ 2 B $$_{12}$$ 12 H $$_{12}$$ 12 |
| title_full_unstemmed |
Colossal barocaloric effects in the complex hydride Li $$_{2}$$ 2 B $$_{12}$$ 12 H $$_{12}$$ 12 |
| title_sort |
colossal barocaloric effects in the complex hydride li $$_{2}$$ 2 b $$_{12}$$ 12 h $$_{12}$$ 12 |
| publisher |
Nature Portfolio |
| publishDate |
2021 |
| url |
https://doaj.org/article/5a9b7d5572db4118a8b9659d69f3f644 |
| work_keys_str_mv |
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