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Abstract Trees have an abundant network of channels for the multiphase transport of water, ions, and nutrients. Recent studies have revealed that multiphase transport of ions, oxygen (O 2 ) gas, and electrons also plays a fundamental role in lithium–oxygen (Li–O 2 ) batteries. The similarity in transport behavior of both systems is the inspiration for the development of Li–O 2 batteries from natural wood featuring noncompetitive and continuous individual pathways for ions, O 2 , and electrons. Using a delignification treatment and a subsequent carbon nanotube/Ru nanoparticle coating process, one is able to convert a rigid and electrically insulating wood membrane into a flexible and electrically conductive material. The resulting cell walls are comprised of cellulose nanofibers with abundant nanopores, which are ideal for Li + ion transport, whereas the unperturbed wood lumina act as a pathway for O 2 gas transport. The noncompetitive triple pathway design endows the wood‐based cathode with a low overpotential of 0.85 V at 100 mA g −1 , a record‐high areal capacity of 67.2 mAh cm −2 , a long cycling life of 220 cycles, and superior electrochemical and mechanical stability. The integration of such excellent electrochemical performance, outstanding mechanical flexibility, and renewable yet cost‐effective starting materials via a nature‐inspired design opens new opportunities for developing portable energy storage devices.