The lithium (Li)âmetal anode offers a promising solution for highâenergyâdensity lithiumâmetal batteries (LMBs). However, the significant volume expansion of the Li metal during charging results in poor cycling stability as a result of the dendritic deposition and broken solid electrolyte interphase. Herein, a facile oneâstep rollâtoâroll fabrication of a zeroâvolumeâexpansion Liâmetalâcomposite anode (zeroVEâLi) is proposed to realize highâenergyâdensity LMBs with outstanding electrochemical and mechanical stability. The zeroVEâLi possesses a sandwichâlike trilayer structure, which consists of an upper electronâinsulating layer and a bottom lithiophilic layer that synergistically guides the Li deposition from the bottom up, and a middle porous layer that eliminates volume expansion. This sandwich structure eliminates dendrite formation, prevents volume change during cycling, and provides outstanding flexibility to the Liâmetal anode even at a practical areal capacity over 3.0 mAh cmâ2. Pairing zeroVEâLi with a commercial NMC811 or LCO cathode, flexible LMBs that offer a recordâbreaking figure of merit (FOM, 45.6), large wholeâcell energy density (375 Wh Lâ1, based on the volume of the anode, separator, cathode, and package), highâcapacity retention (> 99.8% per cycle), and remarkable mechanical robustness under practical conditions are demonstrated.