Comparative Studies on Thermal and Electrochemical Properties of Room-temperature Molten Salt Electrolytes Based on LiTFSI with Urea and Its Derivatives

Abstract

Abstract: Thermal and electrochemical properties of new room-temperature molten salt electrolytes based on LiTFSI with urea and its derivatives have been studied. These electrolytes appear as liquid at room temperature though they are composed of two solids. DSC analysis shows that the eutectic temperature of LiTFSI and methylurea is about-38 ℃, lower than those of LiTFSI-urea and LiTFSI-1,3-dimethylurea. The conduction behavior of these electrolytes has been evaluated by AC impedance spectroscopy. With increasing numbers of methyl of urea, the conductivities of these room-temperature molten salt electrolytes decrease accordingly. The conductivity of LiTFSI/urea eutectic compound is 1.74×10^-4 S/cm at 25 ℃ and 1.24×10^-3 S/cm at 50 ℃.

Key words: Room-temperature molten salt electrolyte, Thermal properties, Ionic conductivity, LiTFSI, Urea, Methylurea

CLC Number:

O646

TrendMD:

LIANG Hong-Ying, WU Feng, CHEN Li-Quan, HUANG Xue-Jie . Comparative Studies on Thermal and Electrochemical Properties of Room-temperature Molten Salt Electrolytes Based on LiTFSI with Urea and Its Derivatives[J]. Chem. J. Chinese Universities, 2003, 24(2): 305.

[1]	LUO Xinyan, JIA Ruonan, XIANG Yong, ZHANG Xiaokun. Progress on the Stretchable Composite Solid Polymer Electrolytes [J]. Chem. J. Chinese Universities, 2022, 43(8): 20220149.
[2]	YANG Lijun, YU Yang, ZHANG Lei. Construction of Dual-functional 2D/3D Hydrid Co₂P-CeO _x Heterostructure Integrated Electrode for Electrocatalytic Urea Oxidation Assisted Hydrogen Production [J]. Chem. J. Chinese Universities, 2022, 43(6): 20220082.
[3]	SUN Jinshi, CHEN Peng, JING Liping, SUN Fuxing, LIU Jia. Synthesis of Hierarchical Porous Aromatic Frameworks for Immobilization of Thiourea Catalyst [J]. Chem. J. Chinese Universities, 2022, 43(10): 20220171.
[4]	MA Yukun, JIN Hui, REN Chuanli, LI Zhibo. Ring-opening Polymerization of Cyclic Esters Using Recyclable Polystyrene Supported Urea-Base Binary Catalyst [J]. Chem. J. Chinese Universities, 2021, 42(9): 2968.
[5]	GONG Minghui,YANG Shanshan,LI Shusheng,KUANG Rui,KONG Xiangzheng. Preparation of Fluorescence Polyurea Microspheres Through Precipitation Polymerization and Their Use for Fe³⁺ Determination^† [J]. Chem. J. Chinese Universities, 2019, 40(6): 1317.
[6]	DUAN Yajun,CHENG Yanyan,SUI Guanghui,ZHU Yanchao,WANG Xiaofeng,GUO Yupeng,WANG Zichen. Lignin Impacts on the Lignin-urea-formaldehyde Copolymer Resin and the Reaction Mechanism^† [J]. Chem. J. Chinese Universities, 2019, 40(5): 1058.
[7]	DONG Xu, FENG Boxu, CHEN Li, LI Xin. Asymmetric [3+2] Annulations of 1,4-Di-thiane-2,5-diol and N-Boc Aldimines Catalyzed by Tertiary-amine Thiourea^† [J]. Chem. J. Chinese Universities, 2018, 39(8): 1707.
[8]	LIU Gang, ZHANG Heng, SUN Heng, ZHU Hongxia, ZHANG Yuhan, ZHU Qingzeng, YUAN Shiling. Molecular Dynamics Simulation on the Structure of Cellulose Inclusion Complexes and Interactions Between Cellulose Chains and Solvent Molecules in Alkali/urea Aqueous Solution^† [J]. Chem. J. Chinese Universities, 2018, 39(4): 714.
[9]	CHEN Xiaofei, LIU Zhaoyang, LEI Yang, FAN Baoan, GUO Fen. Preparation of Ni@MWCNTs Anode Catalyst and Its Application in Direct Urea(Urine) Fuel Cell^† [J]. Chem. J. Chinese Universities, 2018, 39(3): 537.
[10]	XIN Meiling, CHU Zhenhua, LI Yu. Molecular Modification of Polychlorinated Biphenyl Dihydroxy Derivatives Through Molecular Docking Associated with CoMSIA/HQSAR Models^† [J]. Chem. J. Chinese Universities, 2018, 39(2): 299.
[11]	WANG Xuan, JIN Tao, WANG Haowei, LIAO Shengzhi, YANG Huaiyu. Preparation and Characterization of Polysulfide Sealant Microcapsules Based on in situ Polymerization of Urea and Formaldehyde^† [J]. Chem. J. Chinese Universities, 2018, 39(2): 397.
[12]	YAN Xuan,XUE Bingchun,LIU Erbao. Synthesis of Urea Ammonium Halide Cocrystal and Theoretical Study of Its Influencing Factors in Water System^† [J]. Chem. J. Chinese Universities, 2018, 39(12): 2700.
[13]	ZHOU Yamei, KONG Xiangzheng, HAN Hui, JIANG Xubao, ZHU Xiaoli. Easy Synthesis of Porous Polyurea and Its Application in Enzyme Immobilization and Kinetic Resolution of Racemic Phenylethanol^† [J]. Chem. J. Chinese Universities, 2017, 38(3): 495.
[14]	LIU Ning, ZHOU Cheng, SHU Yuanjie, WANG Bozhou, WANG Wenliang. Molecular Dynamics Simulations on Crystal Morphology of N-Guanylurea-dinitramide^† [J]. Chem. J. Chinese Universities, 2017, 38(12): 2231.
[15]	WANG Cuicui, YU Xiaoming, CAI Wensheng, SHAO Xueguang. Determination of Serum Urea by Near-infrared Diffuse Reflectance Spectroscopy Using Silver Mirror for Enhancing the Detectability^† [J]. Chem. J. Chinese Universities, 2017, 38(11): 1947.

Comparative Studies on Thermal and Electrochemical Properties of Room-temperature Molten Salt Electrolytes Based on LiTFSI with Urea and Its Derivatives

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments