Shen Huahai, Zhang Jianwei, Hu Jutao, Zhang Jinchao, Mao Yiwu, Xiao Haiyan, Zhou Xiaosong, Zu Xiaotao
Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China.
School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China.
Nanomaterials (Basel). 2019 Feb 12;9(2):248. doi: 10.3390/nano9020248.
An equiatomic TiZrHfMoNb high-entropy alloy (HEA) was developed as a solar thermal energy storage material due to its outstanding performance of hydrogen absorption. The TiZrHfMoNb alloy transforms from a body-centered cubic (BCC) structure to a face-centered cubic (FCC) structure during hydrogen absorption and can reversibly transform back to the BCC structure after hydrogen desorption. The theoretical calculations demonstrated that before hydrogenation, the BCC structure for the alloy has more stable energy than the FCC structure while the FCC structure is preferred after hydrogenation. The outstanding hydrogen absorption of the reversible single-phase transformation during the hydrogen absorption⁻desorption cycle improves the hydrogen recycling rate and the energy efficiency, which indicates that the TiZrHfMoNb alloy could be an excellent candidate for solar thermal energy storage.
一种等原子TiZrHfMoNb高熵合金（HEA）因其出色的吸氢性能而被开发用作太阳能储热材料。TiZrHfMoNb合金在吸氢过程中从体心立方（BCC）结构转变为面心立方（FCC）结构，并在脱氢后可可逆地变回BCC结构。理论计算表明，氢化前合金的BCC结构比FCC结构具有更稳定的能量，而氢化后FCC结构更受青睐。吸氢-解吸循环过程中可逆单相转变的出色吸氢性能提高了氢循环率和能量效率，这表明TiZrHfMoNb合金可能是太阳能储热的极佳候选材料。
