Replacing state-of-the-art graphite with metallic Li anodes could dramatically increase the energy density of Li-ion technology. However, efforts to achieve uniform Li plating and stripping in conventional liquid electrolytes have had limited success. An alternative approach is to use a solid electrolyte to stabilize the Li interface during cycling. One of the most promising solid electrolytes is Li₇La₃Zr₂O₁₂, which has high ionic conductivity at room temperature, high shear modulus and chemical and electrochemical stability against Li. Despite these properties, Li filament propagation has been observed through LLZO at current densities below what is practical. By combining recent achievements in reducing interface resistance and optimizing microstructure, we demonstrate Li cycling at current densities competitive with Li-ion. Li|LLZO|Li cells are capable of cycling at up to 0.9 ± 0.7 mA cm⁻², 3.8 ± 0.9 mA cm⁻², and 6.0 ± 0.7 mA cm^-2 at room temperature, 40 and 60 °C, respectively. Extended stability is shown in Li plating/stripping tests that passed 3 mAh cm⁻² charge per cycle for a cumulative capacity of 702 mAh cm⁻² using a 1 mA cm⁻² current density. These results demonstrate that solid-state batteries using metallic Li anodes can approach charge/discharge rates and cycling stability comparable to SOA Li-ion.

用金属锂阳极代替最先进的石墨可以显着提高锂离子技术的能量密度。然而，为在常规液体电解质中实现均匀的锂镀覆和剥离而进行的努力取得了有限的成功。另一种方法是在循环过程中使用固体电解质来稳定Li界面。Li ₇ La ₃ Zr ₂ O ₁₂是最有前途的固体电解质之一，在室温下具有高离子电导率，高剪切模量以及对Li的化学和电化学稳定性。尽管具有这些特性，但在低于实际电流密度的情况下，已经通过LLZO观察到Li灯丝的传播。通过结合减少界面电阻和优化微观结构方面的最新成果，我们证明了在与锂离子电池竞争的电流密度下的锂循环。李| LLZO |栗细胞能够以高达0.9±0.7毫安厘米循环的^-2，3.8±0.9毫安厘米^-2，和6.0±0.7毫安厘米^-2 分别在室温下，在40至60℃。Li镀层/剥离测试显示了扩展的稳定性，每个循环通过3 mAh cm ^-2充电，累积容量为702 mAh cm ^-2使用1 mA cm ^-2的电流密度。这些结果表明，使用金属锂阳极的固态电池可以达到与SOA锂离子相当的充电/放电速率和循环稳定性。