Unlocking an All-Anisotropic-Component Integrated Paradigm Toward Practical Solid-State Zinc Metal Pouch Cells

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. Among them, lightweight and carbonized wood material was used to serves as a universal current collector for both MnO₂ cathode and Zn anode. Simultaneously, a phosphate-modified cellulose-based hydrogel with vertically aligned channels was fabricated to achieve high electrochemical compatibility between electrode and electrolyte interfaces. As a result, this configuration enables the stable cycling of Zn||Ca-MnO₂ pouch cells at high mass loading (even up to 50.13 mg cm^-2), with a wide-temperature operability (-30°C to 60°C). Impressively, a maximum energy density of 173.2 Wh kg^-1 is achieved at the current density of 0.1 A g^-1, exceeding the vast majority of previous findings. Such battery structure model can be applied to both vanadium- and manganese-based cathodes, but also expected to other multielectron reaction systems, promoting the fast development of economical nonlithium energy storage batteries.