Si-LiH(LiBH_4)复合物的水解制氢性能  

Hydrogen-generation Properties of Si-LiH(LiBH_4) Composites

作　　者：王瑜彬 刘海镇 徐丽 王新华[1] 李寿权[1] 葛红卫[1] 严密[1] WANG Yubin;LIU Haizhen;XU Li;WANG Xinhua;LI Shouquan;GE Hongwei;YAN Mi(State Key Laboratory of Silicon Materials,School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China;State Key Laboratory of Advanced Transmission Technology,Global Energy Interconnection Research Institute,Beijing 102209,China)

机构地区：[1]浙江大学材料科学与工程学院,浙江杭州310027 [2]全球能源互联网研究院先进输电技术国家重点实验室,北京102209

出　　处：《材料科学与工程学报》2019年第2期173-177,194,共6页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目(51771171;51471149)

摘　　要：作为低成本高容量水解制氢材料,Si材料受到广泛关注,但由于产氢量少和速度慢,使其应用受限。为改进Si的产氢性能,采用球磨方法制备了Si-LiH(LiBH_4)复合物,并在此基础上添加NiCl_2制备了三元复合物,研究了复合物的水解制氢特性。实验结果表明,在硅中添加LiH或LiBH_4可以提高复合物水解制氢的产量和初始放氢速率。在室温下水解1h,二元Si-10%molLiH复合物产氢量约为37mL/g,Si-10%molLiBH_4水解产氢容量为126mL/g,三元的Si-10%molLiH-3%mol NiCl_2复合物水解产氢容量为119mL/g,是硅单独水解产氢量的12倍。Much attentions have been attracted to silicon as a new kind of hydrolysis material to produce hydrogen with water due to its advantages of high hydrogen generation capacity,low price and rich resources.However,the hydrolysis properties of silicon with water are poor because of the slow and low hydrogen productivity.In order to improve the activity of silicon,the Si-LiH(LiBH4)composites were prepared by ball milling,and NiCl2 was added to the composites to form ternary composites.The hydrogen-generation properties of these composites were systematically studied.Results show that the addition of LiH(LiBH4)is beneficial to the improvement of the hydrolysis properties of silicon.Under ambient conditions for 1 h hydrolysis,the hydrogen generation capacity of Si-10 mol%LiH and Si-10 mol%LiBH4 binary composites are about 37 mL/g and 126 mL/g,respectively.That of Si-10 mol%LiH-3 mol%NiCl2 ternary composite reaches around 119 mL/g,which is 12 times higher than the hydrolysis of silicon alone.

关 键 词：水解制氢性能 硅 球磨 添加剂 

分 类 号：TQ116.2[化学工程—无机化工]