All‐Solid‐State Batteries with a Limited Lithium Metal Anode at Room Temperature using a Garnet‐Based Electrolyte

• DOI: 10.1002/adma.202002325
• Publication Date: 2020-11-26T07:56:46Z
• Authors: Shaojie Chen; Jingxuan Zhang; Lu Nie; Xiangchen Hu; Yuanqi Huang; Yi Yu; Wei Liu
• Keywords: Lithium metal; Stripping (fiber); Specific energy; Plating (geology)

Abstract Metallic lithium (Li), considered as the ultimate anode, is expected to promise high‐energy rechargeable batteries. However, owing continuous Li consumption during repeated plating/stripping cycling, excess amount of metal anode commonly utilized in lithium‐metal batteries (LMBs), leading reduced energy density and increased cost. Here, an all‐solid‐state battery (ASSLMB) based on a garnet‐oxide solid electrolyte with ultralow negative/positive electrode capacity ratio (N/P ratio) reported. Compared counterpart using liquid at same low N/P ratios, ASSLMBs show longer cycling life, which attributed higher Coulombic efficiency maintained cycling. The effect species interface layer performance also studied. Importantly, it demonstrated that ASSLMB limited paired LiFePO 4 cathode (5.9 delivers stable long‐term room temperature. Furthermore, revealed enhanced specific energies for ratios can be further achieved by use high‐voltage or high mass‐loading cathode. This study sheds light practical under constrained condition anode.