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<p>Amorphization of cubic In(OH)<sub>3</sub> nanocrystals with a bulk modulus of ~183 ( ± 27) GPa is observed in situ through the utilization of both synchrotron powder X-ray diffraction and Raman scattering techniques as they are subjected to the pressure of up to ~50 GPa. In further combination with ex situ microscopic structural analysis from transmission electron microscopy, ab initio density functional theory calculations and molecular dynamic simulations, it becomes apparent that the amorphization reaction initiates at two surfaces and subsequently propagates into the interior <i>via</i> surmounting an energy barrier of ~19 eV per unit cell. Amorphous In(OH)<sub>3</sub> spontaneously reverts to its original cubic crystal structure at room temperature and ambient pressure. This reversion process, however, requires a recovery period of about 20 days. Such a long crystallization time and the reversible phase transition behaviors between crystalline and non-crystalline states make In(OH)<sub>3</sub> a promising candidate for highly efficient mechanical energy storage with a gravimetric energy density of up to 2.04 ( ± 0.09) MJ/kg.</p>

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Reversible phase transition of indium hydroxide for giant mechanical energy storage

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月29日

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  • Qingbo Sun,
  • Xin Tan,
  • Jian-Tao Wang,
  • Xingshuo Huang,
  • Hanns-Peter Liermann,
  • Nico Giordano,
  • Qinfen Gu,
  • Li Li,
  • Felipe Kremer,
  • Jodie E. Bradby

摘要

Amorphization of cubic In(OH)3 nanocrystals with a bulk modulus of ~183 ( ± 27) GPa is observed in situ through the utilization of both synchrotron powder X-ray diffraction and Raman scattering techniques as they are subjected to the pressure of up to ~50 GPa. In further combination with ex situ microscopic structural analysis from transmission electron microscopy, ab initio density functional theory calculations and molecular dynamic simulations, it becomes apparent that the amorphization reaction initiates at two surfaces and subsequently propagates into the interior via surmounting an energy barrier of ~19 eV per unit cell. Amorphous In(OH)3 spontaneously reverts to its original cubic crystal structure at room temperature and ambient pressure. This reversion process, however, requires a recovery period of about 20 days. Such a long crystallization time and the reversible phase transition behaviors between crystalline and non-crystalline states make In(OH)3 a promising candidate for highly efficient mechanical energy storage with a gravimetric energy density of up to 2.04 ( ± 0.09) MJ/kg.