High-Performance and Flexible Lithium-Ion Battery Anodes Using Modified Buckypaper

Conventional electrodes for lithium ion batteries, represented as the electrode films casted on the metal foil, are struggling to fulfill the requirements for the flexible electronics due to their heavy, thick, rigid, and brittle structure, which can lead to the deterioration of electrical contact followed by low cycling stability under the repeating mechanical stress. Therefore, development of stable and flexible electrodes is of crucial demand for the implementation of lithium ion batteries to the flexible electronic devices. In this study we demonstrate that the flexible and light buckypaper with high electrical conductivity is the promising alternative to the metal current collectors. In addition, the high capacity anode based on SiO 2 nanoparticles is introduced to the functionalized buckypaper. Our electrode reveals high energy storage capability (1,101 mAh/g) even after 300 cycles. The composite electrode can be considered the potential high-performance anode for flexible electronic devices. The flexible, light, and thin anode for the Li-ion battery was fabricated by substituting the metal current collector with the functionalized buckypaper. High capacity could be achieved even after 300 cycles owing to the highly conductive and mechanically strong network of the SiO 2 and functionalized buckypaper composite. • The flexible, light, and thin anode for the Li-ion battery was fabricated by substituting the metal current collector with the functionalized buckypaper. • Silica (SiO 2 ) nanoparticles and nitrogen were directly generated on the buckypaper to develop high performance anode with excellent flexibility. • High energy storage capability (1,101 mAh/g) could be achieved even after 300 cycles owing to the highly conductive and mechanically strong network of the functionalized buckypaper