Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 100: Issue 2
Studies on heat capacities and thermal analysis of Li–Mg–N–H hydrogen storage system
Authors:
F. Xu Chemistry and Chemical Engineering College, Liaoning Normal University, 850 Huanghe Road, Dalian, 116029 People’s Republic of China

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L. Sun Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023 People’s Republic of China

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P. Chen Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023 People’s Republic of China

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Y. Qi Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023 People’s Republic of China

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J. Zhang Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023 People’s Republic of China

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J. Zhao Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023 People’s Republic of China

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Y. Liu Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 People’s Republic of China

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L. Zhang School of Chemistry and Environmental Engineering, Changsha University of Science and Technology, Changsha, 410076 People’s Republic of China

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Zhong Cao School of Chemistry and Environmental Engineering, Changsha University of Science and Technology, Changsha, 410076 People’s Republic of China

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D. Yang School of Chemistry and Environmental Engineering, Changsha University of Science and Technology, Changsha, 410076 People’s Republic of China

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J. Zeng School of Chemistry and Environmental Engineering, Changsha University of Science and Technology, Changsha, 410076 People’s Republic of China

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Y. Du State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083 People’s Republic of China

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Pages:
701–706
Online Publication Date:
10 Dec 2009
Publication Date:
01 May 2010
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-009-0603-5
Keywords:
Li–Mg–N–H system; MDSC; Heat capacity; TG
Restricted access

Abstract  

The heat capacities of LiNH2 and Li2MgN2H2 were measured by a modulated differential scanning calorimetry (MDSC) over the temperature range from 223 to 473 K for the first time. The value of heat capacity of LiNH2 is bigger than that of Li2MgN2H2 from 223 to 473 K. The thermodynamic parameters such as enthalpy (H–H298.15) and entropy (S–S298.15) versus 298.15 K were calculated based on the above heat capacities. The thermal stabilities of them were investigated by thermogravimetric analysis (TG) at a heating rate of 10 K min−1 with Ar gas flow rate of 30 mL min−1 from room temperature to 1,080 K. TG curves showed that the thermal decomposition of them occurred in two stages. The order of thermal stability of them is: Li2MgN2H2 > LiNH2. The results indicate that addition of Mg increases the thermal stability of Li–N–H system and decrease the value of heat capacities of Li–N–H system.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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