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Lithium Batteries and the Solid Electrolyte Interphase (SEI)—Progress and Outlook

Summary

The review opens by connecting global energy transitions to the need for better electrochemical storage, then narrows to interfacial processes that govern ion and electron transport in devices. This Advanced Energy Materials review surveys solid electrolyte interphase (SEI) science for lithium batteries, situating interfacial electrochemistry as a bottleneck for safety, calendar life, and fast charging. The authors summarize how electrolyte reduction near the anode within the electric double layer produces passivating films that modulate ion transport and parasitic reactions. While graphite receives primary emphasis, the discussion extends toward lithium metal anodes. The review also addresses how electrolyte formulation and electrode materials shape SEI nanostructure and stability, and it points to characterization advances plus computational and machine-learning outlooks.

Methods

Literature synthesis structure (D)

  • Genre: Advanced Energy Materials review on SEI science for Li batteries—surveys experimental, spectroscopic, continuum, and atomistic literatures without presenting a single new simulation pipeline.
  • Atomistic content: Appears only as second-hand summaries of cited DFT, classical MD, and related modeling—read the primary papers for functionals, force fields, and electrochemical boundary conditions.

How operators should use this article

  • Treat each mechanistic bullet as a pointer requiring paper_id-level citations before use in MAS claims.
  • For ReaxFF electrolyte workflows, follow specialized parameterization notes such as [[2019fedkin-j-phys-chem-development-reaxff]] rather than this review alone.

Findings

SEI formation picture (intro-level framing)

Electrolyte reduction localized in the Helmholtz double layer at the anode is described as the origin of SEI formation, with subsequent accumulation of reduction products forming the passivating interphase.

Scope emphasized in the review

Coverage includes SEI formation, composition, dynamic evolution, and reaction mechanisms, with graphite as a primary anode focus and discussion extending toward Li metal.

Open needs

The review highlights needs for multimodal characterization and integrated modeling, and discusses machine learning as a route to structure–property inference over large datasets—details and metrics live in the full PDF and its references, not here.

Limitations

Because SEI chemistry is electrolyte-specific, readers should treat broad statements about solvent reduction and salt decomposition as themes requiring paper-level citations before use in force-field or ReaxFF project planning. Review articles aggregate secondary sources; any mechanistic claim must be traced to primary papers. The piece is not a substitute for ReaxFF validation on a specific electrolyte salt/solvent chemistry.

Confidence rationale: med—broad review; faithful to intro framing in extract.

Reader notes (navigation)

Use this review as a roadmap into primary SEI papers before editing battery interface concept pages; avoid importing uncited mechanisms into normalized/claims without paper_id anchors.