Recent progress in SEI engineering for boosting Li metal anodes

Abstract

This review summarizes the formation mechanism, structural model, composition, in situ/operando characterization, properties, and optimization strategies of a SEI.

Design advanced lithium metal anode materials in high energy density lithium batteries

“…The energy storage mechanism of lithium battery is very simple. It makes use of electric energy to intercalate (de-intercalate) lithium ions on the electrode, so that reduction (oxidation) reaction takes place [ [18] , [19] , [20] , [21] , [22] , [23] , [24] , [25] ]. A basic structure of lithium battery is shown in Fig.…”

Stabilizing Lithium-Oxygen Batteries through In Situ Generated Phenyl/LiF-Rich Hybrid SEI Layer with Sulfonyl Fluoride Electrolyte Additive

“…Therefore, forming a stable and compact SEI film is urgently needed to suppress the growth of lithium dendrites and alleviate the side reactions between lithium anode and electrolytes and stabilize the lithium anode. 8 In recent years, researchers have dedicated efforts to the design of stable SEI, Wu et al summarize the latest optimization strategies for SEI, 9 such as artificial passivation protective layers, 10 filmforming additives, 11 and so on. Currently constructed SEIs can usually be divided into inorganic SEIs containing inorganic protective components and organic SEIs containing organic substances.…”

A bifunctional surfactant-like electrolyte additive for a stable lithium metal anode

“…1,2 However, LMAs encounter challenges such as uneven lithium-ion (Li + ) deposition, unstable solid electrolyte interphase (SEI) leading to rupture due to volume expansion, dendrite growth, and exposure of fresh Li to side reactions. 3,4 To mitigate these issues, diverse strategies including SEI artificial construction, [5][6][7] 3D Li host material design, [8][9][10] and electrolyte composition optimization have been explored. [11][12][13] Using electrolyte additives stands out as a straightforward and highly effective approach to enhancing the performance of LMAs in lithium metal batteries (LMBs), as they do not necessitate any additional processing steps.…”

“…1,2 However, LMAs encounter challenges such as uneven lithium-ion (Li + ) deposition, unstable solid electrolyte interphase (SEI) leading to rupture due to volume expansion, dendrite growth, and exposure of fresh Li to side reactions. 3,4 To mitigate these issues, diverse strategies including SEI artificial construction, 5–7 3D Li host material design, 8–10 and electrolyte composition optimization have been explored. 11–13…”