Yu, Hyunjin Liu, Guicheng Wang, Manxiang Ren, Ren Shim, Gayoung Kim, Ji Young Minh Xuan Tran Byun, Dongjin Lee, Joong Kee 2024-01-19T18:03:43Z 2024-01-19T18:03:43Z 2021-09-04 2020-02-05 1944-8244 https://pubs.kist.re.kr/handle/201004/118970 A novel flexible fiber-shaped zinc-polyaniline battery (FZPB) is proposed to enhance the electrochemical performance, mass loading, and stability of polyaniline cathodes. To this end, electron-cyclotron-resonance oxygen plasma-modified carbon fibers are employed. During plasma treatment, on the carbon-fiber surface, O-2(+) plasma breaks the C-C, C-H, and C-N bonds to form C radicals, while the O-2 molecules are broken down to reactive oxygen species (O+, O2+, O2+, and O-2(2+)). The C radicals and the reactive oxygen species are combined to homogeneously form oxygen functional groups, such as -OH, -COOH, and -C=O. The surface area and total pore volume of the treated carbon fibers increase as the plasma attacks. During electrodeposition, aniline interacts with the oxygen functional groups to form N-O and N-H bonds and pi-pi stacking, resulting in a homogeneous and high-loading polyaniline structure and improved adhesion between polyaniline and carbon fibers. In an FZPB, the cathode with plasma-treated carbon fibers and a polyaniline loading of 0.158 mg mg(CF)(-1) (i.e., 2.36 mg cm(CF)(-1)) exhibits a capacity retention of 95.39% after 200 cycles at 100 mA g(-1) and a discharge capacity of 83.96 mA h g(-1) at such a high current density of 2000 mA g(-1), which are similar to 1.67 and 1.24 times those of the pristine carbon-fiber-based one, respectively. Furthermore, the FZPB exhibits high flexibility with a capacity retention of 86.4% after bending to a radius of 2.5 mm for 100 cycles as a wearable energy device. English American Chemical Society Plasma-Assisted Surface Modification on the Electrode Interface for Flexible Fiber-Shaped Zn-Polyaniline Batteries Article 10.1021/acsami.9b19172 1 ACS Applied Materials & Interfaces, v.12, no.5, pp.5820 - 5830 ACS Applied Materials & Interfaces 12 5 5820 5830 scie scopus 000512216900061 2-s2.0-85078915243 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article fiber-shaped Zn-polyaniline battery electron cyclotron resonance O-2-plasma treatment surface modification of carbon fibers electrodeposition of polyaniline high electrochemical performance