ScholarWorks@성균관대학교

초록

Here, we demonstrate a scalable dry-electrode fabrication strategy integrating single-walled carbon nanotube (SWCNT) wrapping of LiNi0.8Co0.15Mn0.03Al0.02O2 particles with roll-to-roll solvent-free electrode processing. This approach resolves the inhomogeneity of conductive additives in mechanical dry-mixing and overcomes conventional slurry-casting limitations. The SWCNT sheath, formed via zeta potential modulation, provides a continuous conductive network enabling ultrahigh active material loading (99.7 wt %, including 0.2 wt % SWCNT) and electrode density (∼4.0 g cm−3) with minimal binder (0.3 wt % polytetrafluoroethylene). Microstructural analyses and digital twin simulations confirm enhanced pore connectivity and 2.5-fold higher lithium-ion diffusivity, ensuring uniform ionic and electronic transport even in ultrathick cathodes (>11 mAh cm−2). In full cells with dry-processed graphite anodes, the cathode delivers ∼315 Wh kg−1 and ∼945 Wh L−1, achieves 80% charge in 20 min, and retains ∼80% capacity after 300–700 cycles. These results establish this strategy as a practical route for high-energy, fast-charging next-generation LIBs.

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