Abstract
The application of all-solid-state lithium metal batteries (ASSLMBs) is hampered by the dynamic deterioration of solid-solid contacts. Anodic degradation is primarily attributed to the accumulation of lithium (Li) voids due to the limited Li diffusion abilities of the anodes. Here, a ternary composite Li anode is introduced by comprising carbon materials embedded within the Li-magnesium substrate. This design effectively suppresses the Li void-induced dynamic deterioration of interfacial contact during continuous cycling. The enhanced Li diffusion pathway with accelerated diffusion rate in bulk anode aids in maintaining contact post-Li stripping, therefore mitigating interface damage caused by Li void formation. The ternary composite anode affords an areal capacity of 14.2 mAh cm−2 with Li utilization rate of 85%. Cooperated with LiNi0.6Co0.2Mn0.2O2 (NCM622) cathodes, the full cells exhibit long-term stability of >300 cycles under room temperature. These findings provide an effective strategy to construct conformal interfaces for high-capacity and long-life ASSLMBs.
Original language | English |
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Pages (from-to) | 2794-2810 |
Number of pages | 17 |
Journal | Joule |
Volume | 8 |
Issue number | 10 |
DOIs | |
Publication status | Published - 16 Oct 2024 |
Keywords
- all-solid-state lithium metal batteries
- lithium diffusion
- lithium voids
- ternary composite anode