Electrospun Separator Based on Sulfonated Polyoxadiazole with Outstanding Thermal Stability and Electrochemical Properties for Lithium-Ion Batteries
Abstract
Traditional polyolefin separators used in lithium-ion batteries (LIBs) are seriously limited by the issues of inferior security and poor electrolyte wettability. Most of the very promising candidate separators based on heat-resistant polymers are, however, inherently difficult to process. Herein, a unique sulfonated aromatic heterocyclic polymer, lithiated poly(diphenyl ether oxadiazole) sulfonate (Li-SPEOD), was synthesized through a simple one-pot method and further electrospun to act as a novel separator (es-Li-SPEOD) for LIBs. In this work, the prepared Li-SPEOD possesses a high degree of sulfonation with a high molecular weight (Mw = 4.31 × 105). The es-Li-SPEOD separator exhibits excellent mechanical and fire-resistance properties and is able to maintain dimensional stability at a temperature of even up to 400 °C in air. The ionic conductivity (3.57 mS cm–1) and lithium-ion transference number (0.37) of the es-Li-SPEOD with an electrochemical stability window of 4.5 V vs Li+/Li can be improved by 382.4 and 32.1%, respectively, compared to those of Celgard-2500 in the LiPF6 electrolyte. The enhanced rate capability and cycle performance of the LiFePO4–Li half-cell are therefore obtained. Moreover, the es-Li-SPEOD displays an outstanding dendrite-suppressing effect for the lithium metal anode. This research proves that the Li-SPEOD-based separator has a broad application perspective inmore »
- Authors:
-
- Sichuan Univ., Chengdu (China)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Luoyang Normal University (China)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1845804
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Applied Energy Materials
- Additional Journal Information:
- Journal Volume: 4; Journal Issue: 1; Journal ID: ISSN 2574-0962
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; polyoxadiazole sulfonate; polymeric single-lithium-ion conductor; heat-resistant polymer; nanofibrous separator; LIBs
Citation Formats
Li, Dazhe, Wang, Hui, Luo, Longbo, Zhu, Jiadeng, Li, Junfeng, Liu, Pengqing, Yu, Yuanyuan, and Jiang, Mengjin. Electrospun Separator Based on Sulfonated Polyoxadiazole with Outstanding Thermal Stability and Electrochemical Properties for Lithium-Ion Batteries. United States: N. p., 2021.
Web. doi:10.1021/acsaem.0c02767.
Li, Dazhe, Wang, Hui, Luo, Longbo, Zhu, Jiadeng, Li, Junfeng, Liu, Pengqing, Yu, Yuanyuan, & Jiang, Mengjin. Electrospun Separator Based on Sulfonated Polyoxadiazole with Outstanding Thermal Stability and Electrochemical Properties for Lithium-Ion Batteries. United States. https://doi.org/10.1021/acsaem.0c02767
Li, Dazhe, Wang, Hui, Luo, Longbo, Zhu, Jiadeng, Li, Junfeng, Liu, Pengqing, Yu, Yuanyuan, and Jiang, Mengjin. Wed .
"Electrospun Separator Based on Sulfonated Polyoxadiazole with Outstanding Thermal Stability and Electrochemical Properties for Lithium-Ion Batteries". United States. https://doi.org/10.1021/acsaem.0c02767. https://www.osti.gov/servlets/purl/1845804.
@article{osti_1845804,
title = {Electrospun Separator Based on Sulfonated Polyoxadiazole with Outstanding Thermal Stability and Electrochemical Properties for Lithium-Ion Batteries},
author = {Li, Dazhe and Wang, Hui and Luo, Longbo and Zhu, Jiadeng and Li, Junfeng and Liu, Pengqing and Yu, Yuanyuan and Jiang, Mengjin},
abstractNote = {Traditional polyolefin separators used in lithium-ion batteries (LIBs) are seriously limited by the issues of inferior security and poor electrolyte wettability. Most of the very promising candidate separators based on heat-resistant polymers are, however, inherently difficult to process. Herein, a unique sulfonated aromatic heterocyclic polymer, lithiated poly(diphenyl ether oxadiazole) sulfonate (Li-SPEOD), was synthesized through a simple one-pot method and further electrospun to act as a novel separator (es-Li-SPEOD) for LIBs. In this work, the prepared Li-SPEOD possesses a high degree of sulfonation with a high molecular weight (Mw = 4.31 × 105). The es-Li-SPEOD separator exhibits excellent mechanical and fire-resistance properties and is able to maintain dimensional stability at a temperature of even up to 400 °C in air. The ionic conductivity (3.57 mS cm–1) and lithium-ion transference number (0.37) of the es-Li-SPEOD with an electrochemical stability window of 4.5 V vs Li+/Li can be improved by 382.4 and 32.1%, respectively, compared to those of Celgard-2500 in the LiPF6 electrolyte. The enhanced rate capability and cycle performance of the LiFePO4–Li half-cell are therefore obtained. Moreover, the es-Li-SPEOD displays an outstanding dendrite-suppressing effect for the lithium metal anode. This research proves that the Li-SPEOD-based separator has a broad application perspective in next-generation lithium batteries.},
doi = {10.1021/acsaem.0c02767},
journal = {ACS Applied Energy Materials},
number = 1,
volume = 4,
place = {United States},
year = {Wed Jan 06 00:00:00 EST 2021},
month = {Wed Jan 06 00:00:00 EST 2021}
}
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