Thin Coating of Microporous Organic Network Makes a Big Difference: Sustainability Issue of Ni Electrodes on the PET Textile for Flexible Lithium-Ion Batteries

Chang Wan Kang; Jaewon Choi; Yoon-Joo Ko; Sang Moon Lee; Hae Jin Kim; Jong Pil Kim; Seung Uk Son

doi:10.1021/acsami.7b12653

Thin Coating of Microporous Organic Network Makes a Big Difference: Sustainability Issue of Ni Electrodes on the PET Textile for Flexible Lithium-Ion Batteries

ACS Appl Mater Interfaces. 2017 Oct 25;9(42):36936-36943. doi: 10.1021/acsami.7b12653. Epub 2017 Oct 16.

Authors

Chang Wan Kang¹, Jaewon Choi¹, Yoon-Joo Ko², Sang Moon Lee³, Hae Jin Kim³, Jong Pil Kim⁴, Seung Uk Son¹

Affiliations

¹ Department of Chemistry, Sungkyunkwan University , Suwon 16419, Korea.
² Laboratory of Nuclear Magnetic Resonance, The National Center for Inter-University Research Facilities (NCIRF), Seoul National University , Seoul 08826, Korea.
³ Korea Basic Science Institute , Daejeon 34133, Korea.
⁴ Korea Basic Science Institute , Busan 46742, Korea.

PMID: 28990385
DOI: 10.1021/acsami.7b12653

Abstract

Poly(ethylene terephthalate) fibers (PET-Fs) were coated with microporous organic networks (MONs) by the Sonogashira coupling of tetra(4-ethynylphenyl)methane with 1,4-diiodobenzene. Ni was deposited on the PET-F@MON via electroless deposition. Interestingly, although Ni on the PET-F showed a sharp decrease in conductivity in repeated bending tests, the PET-F@MON@Ni showed excellent retention of conductivity. We suggest that thin MON layers play roles of an efficient binder for Ni attachment to fibers and a structural buffer for the relaxation of bending strain. The positive effect of MON was supported by scanning electron microscopy studies of the PET-F@Ni or PET-F@MON@Ni retrieved after 2000 bending numbers. Although Ni on the PET-F showed severe detachment after bending tests, PET-F@MON@Ni retained the original morphologies. The pouch cells of lithium-ion batteries fabricated using PET-F@MON@Ni as the current collectors showed excellent performance against bending.

Keywords: Sonogashira coupling; current collector; flexible device; lithium-ion battery; microporous organic network.