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Highly Stable Porous Polyimide Sponge as a Separator for Lithium-Metal Secondary Batteries

To inhibit Li-dendrite growth on lithium (Li)-metal electrodes, which causes capacity deterioration and safety issues in Li-ion batteries, we prepared a porous polyimide (PI) sponge using a solution-processable high internal-phase emulsion technique with a water-soluble PI precursor solution; the pr...

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Autores principales: Choi, Junyoung, Yang, Kwansoo, Bae, Hyeon-Su, Phiri, Isheunesu, Ahn, Hyun Jeong, Won, Jong Chan, Lee, Yong Min, Kim, Yun Ho, Ryou, Myung-Hyun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7600698/
https://www.ncbi.nlm.nih.gov/pubmed/33036223
http://dx.doi.org/10.3390/nano10101976
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author Choi, Junyoung
Yang, Kwansoo
Bae, Hyeon-Su
Phiri, Isheunesu
Ahn, Hyun Jeong
Won, Jong Chan
Lee, Yong Min
Kim, Yun Ho
Ryou, Myung-Hyun
author_facet Choi, Junyoung
Yang, Kwansoo
Bae, Hyeon-Su
Phiri, Isheunesu
Ahn, Hyun Jeong
Won, Jong Chan
Lee, Yong Min
Kim, Yun Ho
Ryou, Myung-Hyun
author_sort Choi, Junyoung
collection PubMed
description To inhibit Li-dendrite growth on lithium (Li)-metal electrodes, which causes capacity deterioration and safety issues in Li-ion batteries, we prepared a porous polyimide (PI) sponge using a solution-processable high internal-phase emulsion technique with a water-soluble PI precursor solution; the process is not only simple but also environmentally friendly. The prepared PI sponge was processed into porous PI separators and used for Li-metal electrodes. The physical properties (e.g., thermal stability, liquid electrolyte uptake, and ionic conductivity) of the porous PI separators and their effect on the Li-metal anodes (e.g., self-discharge and open-circuit voltage properties after storage, cycle performance, rate capability, and morphological changes) were investigated. Owing to the thermally stable properties of the PI polymer, the porous PI separators demonstrated no dimensional changes up to 180 °C. In comparison with commercialized polyethylene (PE) separators, the porous PI separators exhibited improved wetting ability for liquid electrolytes; thus, the latter improved not only the physical properties (e.g., improved the electrolyte uptake and ionic conductivity) but also the electrochemical properties of Li-metal electrodes (e.g., maintained stable self-discharge capacity and open-circuit voltage features after storage and improved the cycle performance and rate capability) in comparison with PE separators.
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spelling pubmed-76006982020-11-01 Highly Stable Porous Polyimide Sponge as a Separator for Lithium-Metal Secondary Batteries Choi, Junyoung Yang, Kwansoo Bae, Hyeon-Su Phiri, Isheunesu Ahn, Hyun Jeong Won, Jong Chan Lee, Yong Min Kim, Yun Ho Ryou, Myung-Hyun Nanomaterials (Basel) Article To inhibit Li-dendrite growth on lithium (Li)-metal electrodes, which causes capacity deterioration and safety issues in Li-ion batteries, we prepared a porous polyimide (PI) sponge using a solution-processable high internal-phase emulsion technique with a water-soluble PI precursor solution; the process is not only simple but also environmentally friendly. The prepared PI sponge was processed into porous PI separators and used for Li-metal electrodes. The physical properties (e.g., thermal stability, liquid electrolyte uptake, and ionic conductivity) of the porous PI separators and their effect on the Li-metal anodes (e.g., self-discharge and open-circuit voltage properties after storage, cycle performance, rate capability, and morphological changes) were investigated. Owing to the thermally stable properties of the PI polymer, the porous PI separators demonstrated no dimensional changes up to 180 °C. In comparison with commercialized polyethylene (PE) separators, the porous PI separators exhibited improved wetting ability for liquid electrolytes; thus, the latter improved not only the physical properties (e.g., improved the electrolyte uptake and ionic conductivity) but also the electrochemical properties of Li-metal electrodes (e.g., maintained stable self-discharge capacity and open-circuit voltage features after storage and improved the cycle performance and rate capability) in comparison with PE separators. MDPI 2020-10-06 /pmc/articles/PMC7600698/ /pubmed/33036223 http://dx.doi.org/10.3390/nano10101976 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Choi, Junyoung
Yang, Kwansoo
Bae, Hyeon-Su
Phiri, Isheunesu
Ahn, Hyun Jeong
Won, Jong Chan
Lee, Yong Min
Kim, Yun Ho
Ryou, Myung-Hyun
Highly Stable Porous Polyimide Sponge as a Separator for Lithium-Metal Secondary Batteries
title Highly Stable Porous Polyimide Sponge as a Separator for Lithium-Metal Secondary Batteries
title_full Highly Stable Porous Polyimide Sponge as a Separator for Lithium-Metal Secondary Batteries
title_fullStr Highly Stable Porous Polyimide Sponge as a Separator for Lithium-Metal Secondary Batteries
title_full_unstemmed Highly Stable Porous Polyimide Sponge as a Separator for Lithium-Metal Secondary Batteries
title_short Highly Stable Porous Polyimide Sponge as a Separator for Lithium-Metal Secondary Batteries
title_sort highly stable porous polyimide sponge as a separator for lithium-metal secondary batteries
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7600698/
https://www.ncbi.nlm.nih.gov/pubmed/33036223
http://dx.doi.org/10.3390/nano10101976
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