Cited 1 time in webofscience Cited 1 time in scopus

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
Authors
Choi, JunyoungYang, KwansooBae, Hyeon-SuPhiri, IsheunesuAhn, Hyun JeongWon, Jong ChanLee, Yong MinKim, Yun HoRyou, Myung-Hyun
DGIST Authors
Choi, Junyoung; Yang, Kwansoo; Bae, Hyeon-Su; Phiri, Isheunesu; Ahn, Hyun Jeong; Won, Jong Chan; Lee, Yong Min; Kim, Yun Ho; Ryou, Myung-Hyun
Issue Date
2020-10
Citation
Nanomaterials, 10(10), 1976
Type
Article
Article Type
Article
Author Keywords
Li secondary batteriesLi‐metal electrodePolyimide separatorsWater‐soluble poly(amic acid), porous polymer
Keywords
SELF-DISCHARGEION BATTERIESLIPERFORMANCESTABILITYANODESDENDRITESMEMBRANEPOLYETHYLENE SEPARATORSRECHARGEABLE BATTERY
ISSN
2079-4991
Abstract
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. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
URI
http://hdl.handle.net/20.500.11750/12712
DOI
10.3390/nano10101976
Publisher
MDPI AG
Related Researcher
  • Author Lee, Yong Min Battery Materials & Systems LAB
  • Research Interests Battery; Electrode; Electrolyte; Separator; Simulation
Files:
Collection:
Department of Energy Science and EngineeringBattery Materials & Systems LAB1. Journal Articles


qrcode mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE