these continues fabrication to hinder The gap between localized material design and macroscopic the practical electrode implementation of Si anodes. Addressing life-cycle limitations requires a co-des

The gap

Consensus across the literature

Supporting evidence — 4 representative gaps

• Recent advances of carbon dots in lithium battery materials (2026) · doi

  CDs have been established as a highly tailorable nanocarbon platform for lithium batteries, with their electrochemical relevance arising from the coupled tunability of carbon core structure and surface structure. Across cathodes, anodes, and electrolytes, convergent functions have been enabled, including percolation restoration and nanoscale gap filling for conductive bridging, interphase regulation for stabilized SEI/CEI evolution, and interfacial reconstruction for improved contact and suppressed polarization. Under a unifying S-F-P logic, these functions are most directly reflected by reduced polarization and slower impedance growth, together with improved Coulombic efficiency, rate capability, and capacity retention; for solid electrolytes, additional gains are manifested by reduced interfacial resistance, increased CCD, and extended symmetric-cell stability. Several constraints remain before broad practical application can be realized: (1) Limited reinforcement and conductivity as standalone additives. Compared with macroscopic carbon networks, CDs typically provide limited mechanical reinforcement and moderate intrinsic conductivity. As a result, composite co-engineering is frequently required to concurrently satisfy electrical, mechanical, and chemical requirements. (2) Reproducibility limited by structural variability and impurities. Batch-to-batch variations in size distribution, defect characteristics, and surface chemistry remain a major source of irreproducibility. In addition, impurity residues introduced during synthesis/purification may intensify parasitic reactions with common salts/solvents, thereby destabilizing SEI/CEI chemistry. (3) Insufficient device-level evidence under practical conditions. Performance and failure statistics under high areal loading, lean electrolyte conditions, elevated temperature, and realistic operation remain underreported. Moreover, quantitative relationships linking CD structure, interfacial evolution, and degradation mechanisms have yet to be systematically established. Accordingly, three coupled directions are suggested to accelerate progress: (1) Structure-controlled, impurity-managed, and scalable synthesis. Continuous or modular production routes should be advanced to ensure verifiable batch-to-batch consistency in size distribution, sp2/sp3 hybridization, defect characteristics, surface chemistry, and impurity profiles. Liu et al. Energy Mater. 2026, 6, 600039 Page 27 of 33 (2) Operando-corroborated interfacial causality and quantitative correlation. In situ/operando tracking of SEI/CEI evolution and metal deposition behavior should be combined with quantitative correlations between CD structural parameters and kinetic/transport metrics (e.g., charge transfer resistance (Rct), diffusivity, t+, and exchange current density), enabling structure-function relationships to be translated into predictive design rules. (3) Manufacturability as a primary design constraint. Process compatibility with industrial electrode fabrication should be explicitly addressed (slurry rheology, binder interactions, coating uniformity, drying/thermal stability, calendaring tolerance, and electrolyte wetting). Without such considerations, interfacial benefits may be offset by aggregation or processing-induced segregation. Although this review centers on lithium batteries, these interfacial principles are expected to remain applicable to other interface-limited chemistries (e.g., Na-metal systems), supporting cross-platform relevance[149]. Only voltage-matched, manufacturable, and operando-validated CD interphases are expected to translate laboratory-level gains into robust device-level benefits. DECLARATIONS Authors’ contributions Data sourcing, data collection, and original draft writing: Liu, X. Literature search, data curation, and original draft writing: Wang, P.; Liu, Q.; Xu, R.; Yao, J.; Lyu, Y.; Liu, D. Supervision, original draft writing, and manuscript review: Zhai, F.; Wang, X. All authors reviewed and approved the final version of the manuscript.

  Keywords: interfacial structure remain limited batch surface evolution chemistry impurity level quantitative operando original draft writing
• Bridging silicon materials and electrode engineering for high energy density lithium ion battery anodes (2026) · doi

  these continues fabrication to hinder The gap between localized material design and macroscopic the practical electrode implementation of Si anodes. Addressing life-cycle limitations requires a co-design strategy that integrates active materials, inactive electrode components, and interfacial chemistry. In this context, co-design has been pursued through matrix engineering and surface/interfacial stabilization. Mechanochemically activated additives strengthen interactions within Si/C composite electrodes, enabling uniform dispersion, a robust matrix that tolerates severe volumetric stress, and improved SEI stability during cycling (Lee D. et al., 2025). Building on this concept, interface-stabilizing anion- anchoring additives (ISAA) were developed to address non-uniform

  Keywords: design electrode interfacial matrix additives uniform continues fabrication hinder localized material macroscopic practical implementation anodes
• Bridging silicon materials and electrode engineering for high energy density lithium ion battery anodes (2026) · doi

  Silicon anodes remain among the most compelling candidates for next-generation lithium-ion batteries because of their exceptionally high theoretical capacity. However, their practical implementation continues to be limited by severe volume expansion, unstable interfacial reactions, low initial Coulombic efficiency, and the difficulty of translating promising material-level advances into commercially relevant electrode systems. As highlighted throughout this Perspective, overcoming these barriers requires moving beyond a purely material-centric view toward an integrated framework that connects active-material design with electrode architecture, interfacial chemistry, and scalable processing strategies. From this perspective, recent progress in silicon anodes can be understood as the result of advances across multiple length scales. At the material level, structural engineering through carbon frameworks, composite design, and functional coatings has significantly improved the mechanical and electrochemical resilience of silicon-based active materials. At the electrode level, conductive agents, binders, electrolyte additives, and prelithiation strategies have evolved into active design parameters that govern charge transport, structural integrity, and interfacial stability under realistic operating conditions. Importantly, these developments show that the performance of advanced silicon materials can only be sustained when they are incorporated into an optimally engineered electrode matrix. A key message emerging from our recent work is that co-design provides an effective pathway for bridging the long-standing gap between laboratory-scale material innovation and practical battery implementation. Mechanochemically activated additives, interface- stabilizing anion-anchoring additives, LiF-rich surface hybrid interlayers, and dry-process-compatible prelithiation strategies collectively illustrate that stable silicon-anode operation cannot be achieved by addressing mechanical, transport, or interfacial factors must be challenges coordinated in a way that simultaneously regulates composite- matrix robustness, Li-ion flux homogeneity, SEI chemistry, and manufacturability. In this sense, practical silicon-anode design is not independently. Rather, these the sum of isolated optimizations, but the outcome of a tightly integrated electrode system. thick-film electrodes Looking ahead, the next stage of silicon-anode development must transition from fundamental proof-of-concept to solving specific industrial pain points (Figure 5). First, future research should (>5.0 mAh/cm2) prioritize high-loading, specifically optimized for extreme fast charging (XFC). This requires addressing the localized polarization and Li-plating risks that arise when high current densities are applied to high-resistance Si/C composites, with a target of achieving 80% state-of-charge in under 15 min. Second, interfacial engineering must extend to solid-state battery (SSB) configurations, where the primary challenge shifts to maintaining chemo-mechanical contact. Future research and development should focus on “breathable” interfaces that can accommodate Si expansion without delaminating from solid electrolytes or forming voids during stripping. Third, routes, particularly dry manufacturing and integrated prelithiation strategies, should be refined to ensure that prelithiation and binder distribution remain uniform at the industrial scale, targeting a production throughput comparable to current graphite-based lines. Finally, to satisfy the demanding performance requirements of diverse applications such as electric vehicles, robotics, and urban air mobility (UAM), the field must establish a quantitative roadmap targeting at least 1,000 EOL (End of Life) cycles and energy densities exceeding 400 Wh/kg and 800 Wh/L at the cell level. scalable processing Overall, the future of silicon anodes will depend not simply on discovering better silicon materials, but on establishing a holistic design philosophy that unifies material innovation, electrode engineering, and scalable manufacturing. By bridging these traditionally separated domains, silicon anodes can move closer to practical realization in high-energy-density batteries capable of meeting the demands of electric vehicles, fast charging, and emerging large-scale energy storage applications.

  Keywords: silicon material electrode design high interfacial anodes practical level strategies prelithiation must integrated active scalable
• Composite Design of Silicon-Based Anode Materials for High-Performance Lithium-Ion Batteries: A Systematic Review (2026) · doi

  The development of silicon anodes is now closely linked to composite engineering. The studies summarized above show that the key problems of silicon cannot be solved by capacity enhancement alone. Carbon frameworks mainly provide flexibility and conductivity; metal-containing phases contribute reinforcement and fast charge transfer; oxide components act as conversion-derived buffers; and polymers offer adhesion, elasticity, and interfacial regulation [29]. For silicon composites to move from laboratory demonstrations toward commercial batteries, evaluation should focus on the behavior of the entire composite electrode rather than on individual components. This requires attention to how interfacial chemistry, such as Si-C or Si-metal bonding, affects stress distribution and reaction kinetics [30]. Precise control of composite architecture is equally important, because excessive porosity can sacrifice volumetric energy density, whereas insufficient buffer space accelerates mechanical failure [31]. Therefore, dense hierarchical structures with efficient void utilization should be prioritized. In addition, practical validation should be carried out in full-cell configurations, under high-loading conditions above 3.0 mg cm⁻², and in electrolyte systems that are close to real battery operation. Overall, silicon-based composites represent an engineering platform in which organic and inorganic components work together to overcome the intrinsic limitations of silicon. Continued optimization of phase distribution, interfacial chemistry, mechanical tolerance, and full-cell compatibility will be essential for unlocking the high-energy potential of Si-based lithium-ion batteries. 92 Proceedings of the 4th International Conference on Functional Materials and Civil Engineering DOI: 10.54254/2755-2721/2026.34145

  Keywords: silicon composite engineering components interfacial metal composites batteries chemistry distribution energy mechanical full cell high