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用于全固态锂聚合物电池的含紫精的混合固体聚合物电解质的电化学性能增强

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

作者信息

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

机构信息

Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences. 1219 Zhongguan Road, Zhenhai District, Ningbo, Zhejiang 315201, China.

CSIR- Central Electrochemical Research Institute, Karaikudi 630 003, India.

出版信息

ACS Mater Au. 2023 Jul 26;3(5):528-539. doi: 10.1021/acsmaterialsau.3c00010. eCollection 2023 Sep 13.

DOI:10.1021/acsmaterialsau.3c00010
PMID:38089092
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10510518/
Abstract

Hybrid solid polymer electrolytes (HSPE) comprising poly(ethylene oxide) (PEO), LiTFSI, barium titanate (BaTiO), 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 BaTiO 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 BaTiO and viologen improve the electrochemical properties of HSPE for the applications in all-solid-state-lithium polymer batteries.

摘要

通过简便的热压法制备了包含聚环氧乙烷（PEO）、双三氟甲烷磺酰亚胺锂（LiTFSI）、钛酸钡（BaTiO）和紫精的混合固体聚合物电解质（HSPE）。利用小角和广角X射线散射、热重分析、差示扫描量热法和拉伸强度对HSPE膜的物理性质进行了研究。还通过离子电导率和迁移数测量对制备的混合固体聚合物电解质进行了研究。所采用的分析共同表明，PEO主体中的每种添加剂都有助于特定性能：LiTFSI对于提供离子物种至关重要，而BaTiO和紫精提高了热稳定性、离子电导率和迁移数。HSPE的锂迁移数增加的值可能归因于TFSI阴离子与紫精正电荷之间的静电吸引。协同作用下，添加的BaTiO和紫精改善了HSPE在全固态锂聚合物电池应用中的电化学性能。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/032f/10510518/0792881392e5/mg3c00010_0009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/032f/10510518/9c463302f93a/mg3c00010_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/032f/10510518/281809e92a6a/mg3c00010_0006.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/032f/10510518/0792881392e5/mg3c00010_0009.jpg

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