Free-standing polymer electrolyte for all-solid-state lithium batteries operated at room temperature

Shih Ting Hsu, Binh T. Tran, Ramesh Subramani, Hanh T.T. Nguyen, Arunkumar Rajamani, Ming Yu Lee, Sheng Shu Hou, Yuh Lang Lee, Hsisheng Teng

研究成果: Article

摘要

This study reports a networked solid polymer electrolyte (N-SPE) containing no solvent, ionic liquid, oligomer, or semisolid additives for lithium-ion batteries (LIBs). The N-SPE comprises a lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt as well as a polymer framework constructed using cage-like polyhedral oligomeric silsesquioxane (POSS) and serving as hubs to network poly(ethylene oxide-co-polypropylene oxide) (P(EO-co-PO)) chains. The networking prevents polymer chain twisting that hinders ion transport. Raman analysis indicates that the POSS hubs improve the dissociation of LiTFSI and localize TFSI anions. The N-SPE exhibits a low glass transition temperature of −43 °C, a high 25 °C ionic conductivity of 1.1 × 10−4 S cm−1, and a small activation energy of 3.5 kJ mol−1 for ion conduction. The localization of TFSI results in a high lithium transference number of 0.62, which is determined to be beneficial to Li+ transport. By incorporating the N-SPE into the LiFePO4 cathode and using a free-standing N-SPE membrane, this study assembles a Li|N-SPE|LiFePO4 battery, which delivers a high capacity of 160 mAh g−1 at 25 °C and exhibits excellent charge−discharge cycling stability. The free-standing feature of the N-SPE makes roll-to-roll assembly of LIBs readily scalable for industrial applications.

原文English
文章編號227518
期刊Journal of Power Sources
449
DOIs
出版狀態Published - 2020 二月 15

指紋

Lithium batteries
lithium batteries
Electrolytes
Polymers
electrolytes
solid state
polymers
room temperature
lithium
Lithium
Temperature
electric batteries
hubs
imides
ions
Ions
semisolids
Polypropylene oxides
Ionic Liquids
twisting

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

引用此文

Hsu, Shih Ting ; Tran, Binh T. ; Subramani, Ramesh ; Nguyen, Hanh T.T. ; Rajamani, Arunkumar ; Lee, Ming Yu ; Hou, Sheng Shu ; Lee, Yuh Lang ; Teng, Hsisheng. / Free-standing polymer electrolyte for all-solid-state lithium batteries operated at room temperature. 於: Journal of Power Sources. 2020 ; 卷 449.
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abstract = "This study reports a networked solid polymer electrolyte (N-SPE) containing no solvent, ionic liquid, oligomer, or semisolid additives for lithium-ion batteries (LIBs). The N-SPE comprises a lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt as well as a polymer framework constructed using cage-like polyhedral oligomeric silsesquioxane (POSS) and serving as hubs to network poly(ethylene oxide-co-polypropylene oxide) (P(EO-co-PO)) chains. The networking prevents polymer chain twisting that hinders ion transport. Raman analysis indicates that the POSS hubs improve the dissociation of LiTFSI and localize TFSI− anions. The N-SPE exhibits a low glass transition temperature of −43 °C, a high 25 °C ionic conductivity of 1.1 × 10−4 S cm−1, and a small activation energy of 3.5 kJ mol−1 for ion conduction. The localization of TFSI− results in a high lithium transference number of 0.62, which is determined to be beneficial to Li+ transport. By incorporating the N-SPE into the LiFePO4 cathode and using a free-standing N-SPE membrane, this study assembles a Li|N-SPE|LiFePO4 battery, which delivers a high capacity of 160 mAh g−1 at 25 °C and exhibits excellent charge−discharge cycling stability. The free-standing feature of the N-SPE makes roll-to-roll assembly of LIBs readily scalable for industrial applications.",
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Free-standing polymer electrolyte for all-solid-state lithium batteries operated at room temperature. / Hsu, Shih Ting; Tran, Binh T.; Subramani, Ramesh; Nguyen, Hanh T.T.; Rajamani, Arunkumar; Lee, Ming Yu; Hou, Sheng Shu; Lee, Yuh Lang; Teng, Hsisheng.

於: Journal of Power Sources, 卷 449, 227518, 15.02.2020.

研究成果: Article

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T1 - Free-standing polymer electrolyte for all-solid-state lithium batteries operated at room temperature

AU - Hsu, Shih Ting

AU - Tran, Binh T.

AU - Subramani, Ramesh

AU - Nguyen, Hanh T.T.

AU - Rajamani, Arunkumar

AU - Lee, Ming Yu

AU - Hou, Sheng Shu

AU - Lee, Yuh Lang

AU - Teng, Hsisheng

PY - 2020/2/15

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N2 - This study reports a networked solid polymer electrolyte (N-SPE) containing no solvent, ionic liquid, oligomer, or semisolid additives for lithium-ion batteries (LIBs). The N-SPE comprises a lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt as well as a polymer framework constructed using cage-like polyhedral oligomeric silsesquioxane (POSS) and serving as hubs to network poly(ethylene oxide-co-polypropylene oxide) (P(EO-co-PO)) chains. The networking prevents polymer chain twisting that hinders ion transport. Raman analysis indicates that the POSS hubs improve the dissociation of LiTFSI and localize TFSI− anions. The N-SPE exhibits a low glass transition temperature of −43 °C, a high 25 °C ionic conductivity of 1.1 × 10−4 S cm−1, and a small activation energy of 3.5 kJ mol−1 for ion conduction. The localization of TFSI− results in a high lithium transference number of 0.62, which is determined to be beneficial to Li+ transport. By incorporating the N-SPE into the LiFePO4 cathode and using a free-standing N-SPE membrane, this study assembles a Li|N-SPE|LiFePO4 battery, which delivers a high capacity of 160 mAh g−1 at 25 °C and exhibits excellent charge−discharge cycling stability. The free-standing feature of the N-SPE makes roll-to-roll assembly of LIBs readily scalable for industrial applications.

AB - This study reports a networked solid polymer electrolyte (N-SPE) containing no solvent, ionic liquid, oligomer, or semisolid additives for lithium-ion batteries (LIBs). The N-SPE comprises a lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt as well as a polymer framework constructed using cage-like polyhedral oligomeric silsesquioxane (POSS) and serving as hubs to network poly(ethylene oxide-co-polypropylene oxide) (P(EO-co-PO)) chains. The networking prevents polymer chain twisting that hinders ion transport. Raman analysis indicates that the POSS hubs improve the dissociation of LiTFSI and localize TFSI− anions. The N-SPE exhibits a low glass transition temperature of −43 °C, a high 25 °C ionic conductivity of 1.1 × 10−4 S cm−1, and a small activation energy of 3.5 kJ mol−1 for ion conduction. The localization of TFSI− results in a high lithium transference number of 0.62, which is determined to be beneficial to Li+ transport. By incorporating the N-SPE into the LiFePO4 cathode and using a free-standing N-SPE membrane, this study assembles a Li|N-SPE|LiFePO4 battery, which delivers a high capacity of 160 mAh g−1 at 25 °C and exhibits excellent charge−discharge cycling stability. The free-standing feature of the N-SPE makes roll-to-roll assembly of LIBs readily scalable for industrial applications.

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