Recently, rechargeable lithium metal polymer battery (LMPB) attracts increasing attention because of its high safety and energy density properties. However, the high contact interfacial resistance of solid-state electrode and electrolyte is still an obstacle to satisfy the demand of high current density and long cycle stability, especially at room and lower temperature. Here, we develop a simple and efficient heat treatment method, to improve the interfacial compatibility between electrode and electrolyte in all-solid-state LMPB, successfully realizing workable LMPB at a reduced temperature (30 °C). The LMPB shows excellent cycling performance and rate capability in the voltage range of 2.5–4.2 V. The behavior of Li⁺ plating/stripping on the surface of lithium metal anode is greatly enhanced. Meanwhile, the interfacial resistance of the LMPB decrease significantly after the heat treatment process.

近来，可再充电锂金属聚合物电池（LMPB）由于其高安全性和能量密度特性而受到越来越多的关注。然而，固态电极和电解质的高接触界面电阻仍然是满足高电流密度和长循环稳定性的要求的障碍，特别是在室温和较低温度下。在这里，我们开发了一种简单有效的热处理方法，以改善全固态LMPB中电极与电解质之间的界面相容性，从而成功地在较低的温度（30°C）下实现了可行的LMPB。LMPB在2.5–4.2 V的电压范围内显示出出色的循环性能和速率能力。Li ⁺的行为大大增强了锂金属阳极表面的电镀/剥离。同时，经过热处理后，LMPB的界面电阻显着降低。