Shen Chunli, Yan Mengyu, Liao Xiaobin, Xu Ruiqi, Wang Hong, Feng Wencong, Yang Wei, Li Yan, Zhou Cheng, Wang Hanxiao, Xu Xu, Mai Liqiang
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, People's Republic of China.
ACS Nano. 2024 Feb 13;18(6):5068-5078. doi: 10.1021/acsnano.3c11724. Epub 2024 Jan 30.
Solid-state batteries based on lithium metal anodes are expected to meet safety challenges while maintaining a high energy density. One major challenge lies in the fast interface degradation between the electrolyte and the lithium metal. Herein, we propose a quasi-3D interphase on a garnet solid-state electrolyte (SSE) by introducing lithiophilic nanotrenches. The nanotrenches created by the lithiophilic nanowire array can induce the superfilling of lithium metal into the nanotrenches, resulting in a low interfacial resistance (4 Ω cm). Moreover, the embedded lithium metal anode optimizes the lithium deposition/stripping behavior not limited at the Li-SSE interface (∼1-10 nm) but extended into the bulk lithium anode (∼10 μm), realizing a high critical current density of 1.8-2.0 mA cm at room temperature (RT). The embedded lithium metal anode is further applied in Li||LiFePO solid-state batteries, demonstrating a high reversible areal capacity of ∼3.0 mAh cm at RT.
基于锂金属负极的固态电池有望在保持高能量密度的同时应对安全挑战。一个主要挑战在于电解质与锂金属之间快速的界面降解。在此，我们通过引入亲锂纳米沟槽在石榴石固态电解质（SSE）上提出一种准三维界面。由亲锂纳米线阵列形成的纳米沟槽可诱导锂金属超填充到纳米沟槽中，从而产生低界面电阻（4Ω·cm）。此外，嵌入的锂金属负极优化了锂沉积/剥离行为，不仅限于锂 - SSE界面（约1 - 10纳米），而是扩展到块状锂负极（约10微米），在室温下实现了1.8 - 2.0 mA·cm²的高临界电流密度。嵌入的锂金属负极进一步应用于Li||LiFePO₄固态电池，在室温下展示出约3.0 mAh·cm²的高可逆面积容量。
