J. Mater. Sci. Technol. ›› 2013, Vol. 29 ›› Issue (8): 715-719.DOI: 10.1016/j.jmst.2013.04.025

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Effect of MWCNTs Additive on Desorption Properties of Zn(BH4)2 Composite Prepared by Mechanical Alloying

Baogang Yang1), Songlin Li1), Hang Wang1), Jintao Xiang1,2), Qiumin Yang1)   

  1. 1) State Key Lab of Powder Metallurgy, Central South University, Changsha 410083, China
    2) College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
  • Received:2012-03-17 Revised:2012-09-07 Online:2013-08-30 Published:2013-07-17
  • Contact: Songlin Li
  • Supported by:

    Hunan Provincial Natural Science Foundation of China (No. 10JJ2037) and National Natural Science Foundation of China (Grant No. 51021063).

Abstract:

In this study, the effect of multi-walled carbon nanotubes (MWCNTs) additive on the dehydriding properties of the Zn(BH4)2/NaCl composite prepared by high energy ball milling were investigated. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) results demonstrated that Zn(BH4)2 was produced from mechanochemical reaction between ZnCl2 and NaBH4. Compared with the undoped sample, 10 wt% MWCNTs effectively lowered the decomposition temperature of Zn(BH4)2 by 15 °C. The complex released 3.6 wt% hydrogen within 250 s at 100 °C and totally released 4.5 wt% hydrogen within 2500 s, indicating it has a considerable potential as a hydrogen storage material.

Key words: Hydrogen storage material, Metal borohydride, Mechanical alloying, Multi-walled carbon nanotubes (MWCNTs)