Electrochemical performance of a thermally rearranged polybenzoxazole nanocomposite membrane as a separator for lithium-ion batteries at elevated temperature
- Authors
- Lee, Moon Joo; Hwang, Jun-Ki; Kim, Ji Hoon; Lim, Hyung-Seok; Sun, Yang -Kook; Suh, Kyung-Do; Lee, Young Moo
- Issue Date
- Feb-2016
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Lithium-ion batteries; Composite membrane; Thermally rearranged polybenzoxazole; Re-precipitation method
- Citation
- JOURNAL OF POWER SOURCES, v.305, pp.259 - 266
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF POWER SOURCES
- Volume
- 305
- Start Page
- 259
- End Page
- 266
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/136625
- DOI
- 10.1016/j.jpowsour.2015.11.068
- ISSN
- 0378-7753
- Abstract
- Shape-tunable hydroxyl copolyimide (HPI) nanoparticles are fabricated by a re-precipitation method and are coated onto electrospun HPI membranes, followed by heat treatment to prepare thermally rearranged polybenzoxazole (TR-PBO) composite membranes. The morphology of HPI nanoparticles consisted of sphere and sea-squirt structures, which is controlled by changing the concentration of the stabilizer. The morphological characteristics of TR-PBO nanoparticles convert from HPI nanoparticles by heat treatment and their composite membranes is confirmed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), infrared spectroscopy (ATR-IR), thermogravimetric analysis (TGA) analysis, and contact angle measurements. TGA and DSC measurements confirm the excellent thermal stability compared to Celgard, a commercial PP separator for lithium-ion batteries (LIBs). Further, TR-PBO nano-composite membranes used in coin-cell type LIBs as a separator show excellent high power density performance as compared to Celgard. This is due to the fact that sea-squirt structured nanoparticles have better electrochemical properties than sphere structured nanoparticles at high temperature.
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