Journal
SMALL
Volume 18, Issue 31, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202202911
Keywords
composite Li metal anodes; lithium deposition; lithium utilization efficiency; phase field simulations; solid-state lithium metal batteries
Categories
Funding
- National Natural Science Foundation of China [22179014]
- China Postdoctoral Science Foundation [2020M683246]
- Fundamental Research Funds for the Central Universities [2021CDJQY-051]
- Hundred Talents Program of Chongqing University
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Solid-state lithium metal batteries (SSLMBs) with high energy density and high safety have the potential to revolutionize energy storage. The construction of the composite Li metal electrode, which plays a crucial role in achieving stable and efficient lithium deposition, has been overlooked. Researchers have successfully developed an electronic-ionic conducting composite Li metal anode, which enables stable electronic-ionic transport and intimate interface contact, leading to stable cycle performance and outstanding electrochemical performance in SSLMBs systems.
Solid-state lithium metal batteries (SSLMBs) promise high energy density and high safety by employing high-capacity Li metal anode and solid-state electrolytes. However, the construction of the composite Li metal electrode is a neglected but important subject when the extensive research focuses on the interface between the solid electrolyte Li6.4La3Zr1.4Ta0.6O12 and Li metal anode. Here, an electronic-ionic conducting composite Li metal anode consisting of Li-Al alloy and LiF is constructed to achieve the stable electronic-ionic transport channel and the intimate interface contact, which can realize the uniform Li deposition and the efficiency utilization of lithium in composite Li metal electrode. Therefore, the symmetric battery with composite Li metal electrode exhibits the high critical current density with 1.2 mA cm(-2) and stable cycle for 1500 h at 0.3 mA cm(-2), 25 degrees C. Moreover, the SSLMBs matched with LiFePO4 and LiNi0.8Co0.1Mn0.1O2 achieve the outstanding electrochemical performance, verifying the feasibility of composite Li metal electrode in various SSLMBs systems.
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