Enhanced Electrochemical Performance of Hybrid Solid Polymer Electrolytes Encompassing Viologen for All-Solid-State Lithium Polymer Batteries

IF 5.7 Q2 CHEMISTRY, PHYSICAL

ACS Materials Au Pub Date : 2023-07-26 DOI:10.1021/acsmaterialsau.3c00010

Natarajan Angulakhsmi, Bebin Ambrose, Swamickan Sathya, Murugavel Kathiresan, Gabriele Lingua, Stefania Ferrari, Erathimmanna Bhoje Gowd, Wenyang Wang, Cai Shen, Giuseppe Antonio Elia, Claudio Gerbaldi* and Arul Manuel Stephan*,

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Abstract

Hybrid solid polymer electrolytes (HSPE) comprising poly(ethylene oxide) (PEO), LiTFSI, barium titanate (BaTiO₃), and viologen are prepared by a facile hot press. The physical properties of the HSPE membranes are studied by using small-angle and wide-angle X-ray scattering, thermogravimetric analysis, differential scanning calorimetry, and tensile strength. The prepared hybrid solid polymer electrolytes are also investigated by means of ionic conductivity and transport number measurements. The employed analyses collectively reveal that each additive in the PEO host contributes to a specific property: LiTFSI is essential in providing ionic species, while BaTiO₃ and viologen enhance the thermal stability, ionic conductivity, and transport number. The enhanced value in the Li⁺-transport number of HSPE are presumably attributed to the electrostatic attraction of TFSI anions and the positive charges of viologen. Synergistically, the added BaTiO₃ and viologen improve the electrochemical properties of HSPE for the applications in all-solid-state-lithium polymer batteries.

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用于全固态锂聚合物电池的含Violegen的混合固体聚合物电解质的电化学性能增强

采用简易热压法制备了由聚环氧乙烷(PEO)、LiTFSI、钛酸钡(BaTiO3)和紫胶组成的杂化固体聚合物电解质(HSPE)。采用小角和广角x射线散射、热重分析、差示扫描量热法和拉伸强度等方法研究了HSPE膜的物理性能。通过离子电导率和输运数的测定对所制备的杂化固体聚合物电解质进行了研究。所采用的分析共同揭示了PEO主体中的每种添加剂都有助于特定的性质:LiTFSI在提供离子种类方面是必不可少的，而BaTiO3和viologen则增强了热稳定性，离子电导率和运输数量。HSPE的Li+输运数的增加可能是由于TFSI阴离子的静电吸引和紫胶的正电荷。添加的BaTiO3和viologen协同作用，改善了HSPE在全固态锂聚合物电池中的电化学性能。

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来源期刊

ACS Materials Au 材料科学-

CiteScore

5.00

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0.00%

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期刊介绍： ACS Materials Au is an open access journal publishing letters articles reviews and perspectives describing high-quality research at the forefront of fundamental and applied research and at the interface between materials and other disciplines such as chemistry engineering and biology. Papers that showcase multidisciplinary and innovative materials research addressing global challenges are especially welcome. Areas of interest include but are not limited to:Design synthesis characterization and evaluation of forefront and emerging materialsUnderstanding structure property performance relationships and their underlying mechanismsDevelopment of materials for energy environmental biomedical electronic and catalytic applications