Dataset resource: Spatiotemporal-coupled lithiotropic framework enables highly reversible and long life 1200 Wh L−1 Li metal pouch cell

Developing high-energy-density Li metal batteries (LMBs) with ≥ 500 Wh kg−1 and ≥ 1000 Wh L−1 using ultrathin anode (< 50 μm) is crucial for all-electric vehicles. However, ultrathin anodes suffer from poor reversibility due to spatially heterogeneous Li nucleation and temporally irreversible dendritic growth, limiting battery life and rate performance. Herein, we propose a spatiotemporal-coupled lithiotropic framework as a Li metal anode design paradigm that overcomes both spatial heterogeneity and temporal irreversibility. This framework spatially reduces critical Li nucleation energy and improves nucleation rate. It also temporally optimizes Li adsorption and diffusion at interphases and body phases, thereby homogenizing the interfacial electric field and full-stage Li+ fluxes. This optimization maintains stable full cell cycling for over 1.7 years, also enabling LMBs with high gravimetric and volumetric energy densities exceeding 500 Wh kg−1 and 1200 Wh L−1 as well as a long cycle life of over 150 cycles at 2C.