A Combined Lithium Intercalation and Plating Mechanism Using Conductive Carbon‐Fiber Electrodes

Abstract

Lithium‐metal anodes (LMAs) are desirable for next‐generation rechargeable batteries because of their high energy density. However, in practical applications they are hindered by inhomogeneous and uncontrolled lithium‐dendrite deposition during cycling. Herein, we propose a dual charge storage mechanism, using freestanding carbon‐fiber paper (CFP) with carbon fillers electrode. These CFP electrodes are manufactured at an industrial scale and act both as a host for lithium (Li) intercalation and as a conductive and porous 3D scaffold for Li plating/stripping. The CFP electrode exhibits excellent long‐term cycling stability, as evidenced by Coulombic efficiencies of over 99.5 % on the 250th cycle in CFP|Li half‐cells with a lithiation capacity of 1.5 mA h cm−2 and current density of 0.5 mA cm−2. We also demonstrate that the CFPs are sufficiently electrically conductive to operate in small pouch cells without metal foil current collectors, further improving the energy density of the proposed electrodes.

One-Step Preparation of a Superhydrophobic Surface by Electric Discharge Machining with a Carbon Fiber Brush Electrode

“…Therefore, the development of a simple method for the one-step fabrication of superhydrophobic micro-/nano-structures on complex surfaces would be crucial. Carbon fiber is generally used to manufacture electrode and carbon fiber products with high mechanical quality. , In particular, because of the advantages of carbon fiber, which include small wire diameter and electrical conductivity, some researchers explored its performance in EDM. , However, the wettability of the discharged surfaces was not discussed. In fact, carbon-based materials have been proven to have low surface energy. , If carbon fiber could be used for the processing of complex surfaces based on its flexibility and small diameter, the problem of manufacturing superhydrophobic coatings for complex hierarchical surfaces would be solved.…”