Stretchable PEDOT:PSS/Li-TFSI/XSB Composite Films for Electromagnetic Interference Shielding

• DOI: 10.1021/acsami.2c21604
• Publication Date: 2023-02-07T03:04:21Z
• Authors: Xin Jiang; Junwei Zhou; Xinke Zhong; Zhaopeng Hu; Rongyan Hu; Yihu Song; Qiang Zheng
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

Electromagnetic interference (EMI) shielding materials with stretchability are important for developing wearable and flexible appliances. Herein, lithium bis(trifloromethanesulfonyl)imide (Li-TFSI)-doped poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) carboxylated styrene-butadiene rubber (XSB) latex used to prepare stretchable EMI composite films of 0.2 mm in thickness. In these films, the doped PEDOT:PSS nanoparticles form tenuous conductive pathways between hexagonally packed particles, resulting higher efficiency (EMI SE) compared containing traditional dopant ethylene glycol. For purpose shielding, 6 wt % Li-TFSI demonstrate SE 50 30 dB (12.4 GHz) at 0 100% strains, respectively, being highest values among reported composites except those using liquid metal as filler. The investigation also provides a simple environmentally friendly preparation method highlighted development lightweight applications electronics near future.