▎ 摘　　要

NOVELTY - Composite comprises vertically aligned carbon nanotubes, and an electroactive species disposed on the vertically aligned nanotube. The electroactive is capable of bonding with a target gas when in a first oxidation state, and releasing the gas when the species is in a second oxidation state. The composite further comprises: carbon fibers, graphene, reduced graphene oxide, carbon black, Ketjen black, or structured carbon black; and a polymer binder. USE - The composite is useful: in an electrode assembly, an electrochemical cell, and a gas separation system for separating a target gas e.g. carbon dioxide or sulfur dioxide from a gas mixture; and capturing a target gas using an electroswing adsorption cell. ADVANTAGE - The composite enables a higher capture rate than when using a thicker or less porous material. The thicker layer of vertically aligned carbon nanotubes (VACNTs) can form a structured or patterned electrode, providing a shorter diffusion pathway for the target species and enabling a high capture rate when other materials are used. Additionally, coating the electroactive species on the carbon nanotubes can provide improved cycle life. Thus, a significant improvement is provided by the composite of the present disclosure. DETAILED DESCRIPTION - INDEPENDENT CLAIMs are also included for: (1) an electrode assembly comprising a porous separator; (2) an electrochemical cell; (3) a gas separation system comprising a electrochemical cells in fluid communication with a gas inlet and a gas outlet; and (4) making the composite. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the graph of cell voltage and current (amperes, A) versus time (seconds, s) for the sealed cell.