Na, Wonjun Koh, Ki Hwan Lee, Albert S. Cho, Sangho Ok, Byoeri Hwang, Suk-Won Lee, Jin Hong Koo, Chong Min 2024-01-19T20:32:29Z 2024-01-19T20:32:29Z 2021-09-02 2019-03-01 0376-7388 https://pubs.kist.re.kr/handle/201004/120240 Silica nanoparticles were chemically grafted onto a porous polyethylene separator to improve the adhesion strength, thermal stability, and electrochemical performance of a polyolefin separator. A surface activation via UVO plasma treatment, followed by silane hybridization yielded a polymeric binder-free, thin coating of SiO2 nanoparticles onto the separator. The chemical grafting provided a much stronger adhesive strength (> 2.5 N/cm), reduced thermal shrinkage (< 5% at 120 degrees C), and higher ionic conductivity (0.84 mS/cm) than conventional physical coating of a ceramic particle-based polymer composite. Lithium-ion batteries fabricated with metallic lithium as the anode, a LiFePO4 (LFP) cathode and SiO2-grafted separator showed an excellent rate capability (68 mAh/g at 5 C) and cycling performance (143 mAh/g after 200 cycles). English ELSEVIER HYBRID IONOGEL ELECTROLYTES ATOMIC LAYER DEPOSITION POLYMER ELECTROLYTES COMPOSITE MEMBRANE CYCLING STABILITY CHALLENGES Binder-less chemical grafting of SiO2 nanoparticles onto polyethylene separators for lithium-ion batteries Article 10.1016/j.memsci.2018.12.039 1 JOURNAL OF MEMBRANE SCIENCE, v.573, pp.621 - 627 JOURNAL OF MEMBRANE SCIENCE 573 621 627 scie scopus 000454830600065 2-s2.0-85058695245 Engineering, Chemical Polymer Science Engineering Polymer Science Article HYBRID IONOGEL ELECTROLYTES ATOMIC LAYER DEPOSITION POLYMER ELECTROLYTES COMPOSITE MEMBRANE CYCLING STABILITY CHALLENGES Lithium-ion battery Separator Silica nanoparticle Chemical grafting