Li NH-LiBH₄：一种具有近室温氢吸附和快速锂离子传导性能的复合氢化物。

Li NH-LiBH : a Complex Hydride with Near Ambient Hydrogen Adsorption and Fast Lithium Ion Conduction.

作者信息

Wang Han, Cao Hujun, Zhang Weijin, Chen Jian, Wu Hui, Pistidda Claudio, Ju Xiaohua, Zhou Wei, Wu Guotao, Etter Martin, Klassen Thomas, Dornheim Martin, Chen Ping

机构信息

Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian, 116023, P.R. China.

University of Chinese Academy of Sciences, Beijing, 100049, P.R. China.

出版信息

Chemistry. 2018 Jan 26;24(6):1342-1347. doi: 10.1002/chem.201703910. Epub 2017 Dec 20.

DOI:10.1002/chem.201703910

PMID:29024174

Abstract

Complex hydrides have played important roles in energy storage area. Here a complex hydride made of Li NH and LiBH was synthesized, which has a structure tentatively indexed using an orthorhombic cell with a space group of Pna2 and lattice parameters of a=10.121, b=6.997, and c=11.457 Å. The Li NH-LiBH sample (in a molar ratio of 1:1) shows excellent hydrogenation kinetics, starting to absorb H at 310 K, which is more than 100 K lower than that of pristine Li NH. Furthermore, the Li ion conductivity of the Li NH-LiBH sample is about 1.0×10 S cm at room temperature, and is higher than that of either Li NH or LiBH at 373 K. Those unique properties of the Li NH-LiBH complex render it a promising candidate for hydrogen storage and Li ion conduction.

摘要

复杂氢化物在能量存储领域发挥了重要作用。在此合成了一种由LiNH和LiBH构成的复杂氢化物，其结构初步使用正交晶胞进行索引，空间群为Pna2，晶格参数a = 10.121、b = 6.997和c = 11.457 Å。LiNH - LiBH样品（摩尔比为1:1）表现出优异的氢化动力学，在310 K开始吸收H，这比原始LiNH的吸收温度低100 K以上。此外，LiNH - LiBH样品在室温下的锂离子电导率约为1.0×10 S cm ，高于LiNH或LiBH在373 K时的电导率。LiNH - LiBH复合物的这些独特性质使其成为储氢和锂离子传导的有前途的候选材料。