Journal
ADVANCED MATERIALS
Volume 29, Issue 36, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201701169
Keywords
dendrite growth; electrochemical energy storage; Li-metal anodes; organic electrolytes; solid-state electrolytes
Categories
Funding
- US Department of Energy [DE-AR0000384, DE-EE0006860]
- Nanostructures for Electrical Energy Storage (NEES), an Energy Frontier Research Center - US Department of Energy, Office of Science, and Basic Energy Sciences [DESC0001160]
- China Scholarship Council (CSC) [201506680044]
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High-energy lithium-metal batteries are among the most promising candidates for next-generation energy storage systems. With a high specific capacity and a low reduction potential, the Li-metal anode has attracted extensive interest for decades. Dendritic Li formation, uncontrolled interfacial reactions, and huge volume effect are major hurdles to the commercial application of Li-metal anodes. Recent studies have shown that the performance and safety of Li-metal anodes can be significantly improved via organic electrolyte modification, Li-metal interface protection, Li-electrode framework design, separator coating, and so on. Superior to the liquid electrolytes, solid-state electrolytes are considered able to inhibit problematic Li dendrites and build safe solid Li-metal batteries. Inspired by the bright prospects of solid Li-metal batteries, increasing efforts have been devoted to overcoming the obstacles of solid Li-metal batteries, such as low ionic conductivity of the electrolyte and Li-electrolyte interfacial problems. Here, the approaches to protect Li-metal anodes from liquid batteries to solid-state batteries are outlined and analyzed in detail. Perspectives regarding the strategies for developing Li-metal anodes are discussed to facilitate the practical application of Li-metal batteries.
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