材料科学
法拉第效率
电解质
阳极
阴极
锂(药物)
化学工程
金属
氧化物
剥离(纤维)
金属锂
电镀(地质)
电化学
电池(电)
分析化学(期刊)
冶金
复合材料
电极
物理化学
功率(物理)
化学
内分泌学
工程类
地质学
物理
医学
量子力学
色谱法
地球物理学
作者
Shaojie Chen,Jingxuan Zhang,Lu Nie,Xiangchen Hu,Yonghui Huang,Yi Yu,Wei Liu
标识
DOI:10.1002/adma.202002325
摘要
Abstract Metallic lithium (Li), considered as the ultimate anode, is expected to promise high‐energy rechargeable batteries. However, owing to the continuous Li consumption during the repeated Li plating/stripping cycling, excess amount of the Li metal anode is commonly utilized in lithium‐metal batteries (LMBs), leading to reduced energy density and increased cost. Here, an all‐solid‐state lithium‐metal battery (ASSLMB) based on a garnet‐oxide solid electrolyte with an ultralow negative/positive electrode capacity ratio (N/P ratio) is reported. Compared with the counterpart using a liquid electrolyte at the same low N/P ratios, ASSLMBs show longer cycling life, which is attributed to the higher Coulombic efficiency maintained during cycling. The effect of the species of the interface layer on the cycling performance of ASSLMBs with low N/P ratio is also studied. Importantly, it is demonstrated that the ASSLMB using a limited Li metal anode paired with a LiFePO 4 cathode (5.9 N/P ratio) delivers a stable long‐term cycling performance at room temperature. Furthermore, it is revealed that enhanced specific energies for ASSLMBs with low N/P ratios can be further achieved by the use of a high‐voltage or high mass‐loading cathode. This study sheds light on the practical high‐energy all‐solid‐state batteries under the constrained condition of a limited Li metal anode.
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