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Crystal structures and thermodynamic properties on phase change materials n-CnH2n+1NH3 center dot H2PO4(s) (n=8, 9 and 10)
Zhang, Li-Jun1; Di, You-Ying1; Tan, Zhi-Cheng2,3; Dou, Jian-Min1
关键词Crystal Structure n-cnh2n+1nh3 Center Dot H2po4(s) (N=8 Adiabatic Calorimetry 9 And 10) Low-temperature Heat Capacity Solid-solid Phase Transition Thermodynamic Functions
刊名SOLAR ENERGY MATERIALS AND SOLAR CELLS
2012-06-01
DOI10.1016/j.solmat.2012.02.029
101页:79-86
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Technology ; Physical Sciences
类目[WOS]Energy & Fuels ; Materials Science, Multidisciplinary ; Physics, Applied
研究领域[WOS]Energy & Fuels ; Materials Science ; Physics
关键词[WOS]HEAT-CAPACITY ; IONIC LIQUIDS ; LATTICE ; TRANSITION ; ENTHALPY
英文摘要Crystal structures of three long-chain n-alkylammonium dihydrogen phosphates n-CnH2n+1NH3 center dot H2PO4(s) (n=8, 9 and 10) (abbreviated as C8P, C9P and C10P), which may be used as the phase change materials in storage and utilization of solar energy, were determined in layered structures by X-ray crystallography, and the same hydrogen bonding network is observed for these long carbon chain compounds. Low-temperature heat capacities of the compounds were measured by a precision adiabatic calorimeter over the temperature range from 78 to 380 K. Two solid-solid phase transitions were observed for C8P and C9P, but only one solid-solid phase transition was observed for C10P. The temperatures, molar enthalpies and entropies of the phase transitions were determined based on the analysis of heat capacity curves. Experimental heat capacities for each compound were fitted to two polynomial equations. The smoothed heat capacities and thermodynamic functions (H-T(o)-H-298.15(o)) and (S-T(o)-E-298.15(o)) of the three compounds were calculated with an interval of 10 K in terms of the polynomial equations. (C) 2012 Elsevier B.V. All rights reserved.
语种英语
WOS记录号WOS:000303957000015
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文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/142992
专题中国科学院大连化学物理研究所
作者单位1.Liaocheng Univ, Coll Chem & Chem Engn, Shandong Prov Key Lab Chem Energy Storage & Novel, Liaocheng 252059, Shandong, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Div Energy Storage, Dalian 116023, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Peoples R China
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Zhang, Li-Jun,Di, You-Ying,Tan, Zhi-Cheng,et al. Crystal structures and thermodynamic properties on phase change materials n-CnH2n+1NH3 center dot H2PO4(s) (n=8, 9 and 10)[J]. SOLAR ENERGY MATERIALS AND SOLAR CELLS,2012,101:79-86.
APA Zhang, Li-Jun,Di, You-Ying,Tan, Zhi-Cheng,&Dou, Jian-Min.(2012).Crystal structures and thermodynamic properties on phase change materials n-CnH2n+1NH3 center dot H2PO4(s) (n=8, 9 and 10).SOLAR ENERGY MATERIALS AND SOLAR CELLS,101,79-86.
MLA Zhang, Li-Jun,et al."Crystal structures and thermodynamic properties on phase change materials n-CnH2n+1NH3 center dot H2PO4(s) (n=8, 9 and 10)".SOLAR ENERGY MATERIALS AND SOLAR CELLS 101(2012):79-86.
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