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Kang SH, Jeong HY, Kim TH, Lee JY, Hong SK, Hong YT, Choi J, So S, Yoon SJ, Yu DM. Aluminum Diethylphosphinate-Incorporated Flame-Retardant Polyacrylonitrile Separators for Safety of Lithium-Ion Batteries. Polymers (Basel) 2022; 14:polym14091649. [PMID: 35566819 PMCID: PMC9100846 DOI: 10.3390/polym14091649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 04/12/2022] [Accepted: 04/13/2022] [Indexed: 02/01/2023] Open
Abstract
Herein, we developed polyacrylonitrile (PAN)-based nanoporous composite membranes incorporating aluminum diethylphosphinate (ADEP) for use as a heat-resistant and flame-retardant separator in high-performance and safe lithium-ion batteries (LIBs). ADEP is phosphorus-rich, thermally stable, and flame retardant, and it can effectively suppress the combustibility of PAN nanofibers. Nanofibrous membranes were obtained by electrospinning, and the content of ADEP varied from 0 to 20 wt%. From the vertical burning test, it was demonstrated that the flame retardancy of the composite membranes was enhanced when more than 5 wt% of ADEP was added to PAN, potentially increasing the safety level of LIBs. Moreover, the composite membrane showed higher ionic conductivity and electrolyte uptake (0.83 mS/cm and 137%) compared to those of commercial polypropylene (PP) membranes (Celgard 2400: 0.65 mS/cm and 63%), resulting from interconnected pores and the polar chemical composition in the composite membranes. In terms of battery performance, the composite membrane showed highly stable electrochemical and heat-resistant properties, including superior discharge capacity when compared to Celgard 2400, indicating that the PAN/ADEP composite membrane has the potential to be used as a heat-resistant and flame-retardant separator for safe and high-power LIBs.
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Affiliation(s)
- Seok Hyeon Kang
- Energy Materials Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Korea; (S.H.K.); (H.Y.J.); (T.H.K.); (J.Y.L.); (Y.T.H.)
- Department of Polymer Engineering, Chungnam National University, Daejeon 34134, Korea;
| | - Hwan Yeop Jeong
- Energy Materials Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Korea; (S.H.K.); (H.Y.J.); (T.H.K.); (J.Y.L.); (Y.T.H.)
| | - Tae Ho Kim
- Energy Materials Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Korea; (S.H.K.); (H.Y.J.); (T.H.K.); (J.Y.L.); (Y.T.H.)
| | - Jang Yong Lee
- Energy Materials Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Korea; (S.H.K.); (H.Y.J.); (T.H.K.); (J.Y.L.); (Y.T.H.)
| | - Sung Kwon Hong
- Department of Polymer Engineering, Chungnam National University, Daejeon 34134, Korea;
| | - Young Taik Hong
- Energy Materials Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Korea; (S.H.K.); (H.Y.J.); (T.H.K.); (J.Y.L.); (Y.T.H.)
| | - Jaewon Choi
- Department of Polymer Science and Engineering, Kyungpook National University, Daegu 41566, Korea;
| | - Soonyong So
- Energy Materials Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Korea; (S.H.K.); (H.Y.J.); (T.H.K.); (J.Y.L.); (Y.T.H.)
- Correspondence: (S.S.); (S.J.Y.); (D.M.Y.)
| | - Sang Jun Yoon
- Energy Materials Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Korea; (S.H.K.); (H.Y.J.); (T.H.K.); (J.Y.L.); (Y.T.H.)
- Correspondence: (S.S.); (S.J.Y.); (D.M.Y.)
| | - Duk Man Yu
- Energy Materials Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Korea; (S.H.K.); (H.Y.J.); (T.H.K.); (J.Y.L.); (Y.T.H.)
- Correspondence: (S.S.); (S.J.Y.); (D.M.Y.)
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