Despite extensive research on flexible/wearable power sources, their structural stability and electrochemical reliability upon mechanical deformation and charge/discharge cycling have not yet been completely achieved. A new class of galvanically replaced single-bodied lithium-ion battery (LIB) fabric electrodes is demonstrated. As a proof of concept, metallic tin (Sn) is chosen as an electrode active material. Mechanically compliable polyethyleneterephthalate (PET) fabrics are conformally coated with thin metallic nickel (Ni) layers via electroless plating to develop flexible current collectors. Driven by the electrochemical potential difference between Ni and Sn, the thin Ni layers are galvanically replaced with Sn, resulting in the fabrication of a single-bodied Sn@Ni fabric electrode (Sn is monolithically embedded in the Ni matrix on the PET fabric). Benefiting from the chemical/structural uniqueness and rationally designed bicontinuous ion/electron transport pathways, the single-bodied Sn@Ni fabric electrode provides exceptional redox reaction kinetics and omnidirectional deformability (notably, origami-folding boats), which lie far beyond those attainable with conventional LIB electrode technologies.
Bibliographical noteFunding Information:
This research was supported by Technology Development Program to Solve Climate Changes (NRF-2018M1A2A2063353) through NRF (National Research Foundation of Korea), funded by Ministry of Science and ICT of Republic of Korea. This work was also supported by the NRF Grant funded by the Korean Government (NRF-2015R1A5A7037615 and NRF-2018R1A2A1A05019733) and the L&F Co.'s World Class 300 Project of the Korea Institute of Advancement of Technology (KIAT) funded by the Ministry of Trade, Industry, and Energy & Ministry of SMEs and Startups (No. S2483103).
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics