High-safety and low-cost Zn metal batteries hold great promise for energy storage, but their limited energy density remains a major bottleneck restricting their practical development. Here, an all-anisotropic-component integrated model with full high-flux characteristic is presented for enabling high-specific-energy devices. By utilizing natural and recyclable wood-based materials, we validate its feasibility in classic Zn–MnO2 single-electron reaction system.