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Open research questions in Advanced battery technologies research

39 unresolved questions extracted from the limitations and future-work sections of 739 Advanced battery technologies research papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • Aqueous ZIBs have garnered widespread attention due to their unique advantages of high safety, low cost, good cycling stability, and environmental sustainability, offering strong commercialization prospects. However, ZIBs are https://doi.org/10.1007/s40820-026-02301-w © The authors Nano-Micro Lett.

    Design Strategies Toward Zinc Anodes with High Utilization Rate for Practical Aqueous Zinc-Ion Batteries · 2026 · DOI

  • work identifies interfacial mechanical adaptivity as a critical yet underappreciated design parameter for metal anodes operating under extreme conditions. The concepts presented here are not limited to zinc systems and offer a general strategy for developing durable, high-power metal-based energy storage.

    A mechanically adaptive spider-web-like interphase enables secondlevel ultrafast and durable zinc metal batteries · 2026 · DOI

  • Summary of key advances HEs have emerged as a promising platform for addressing the two intertwined challenges in ZIBs: polyiodide shuttling at the cathode and Zn dendrite growth/corrosion at the anode. This review has systematically summarized the design principles and working mechanisms of HEs in ZIBs. For single-component HEs, charge-regulation strategies (e.g., sulfonate-functionalized networks) electrostatically repel polyiodides while guiding uniform Zn2+ deposition, whereas chemically interactive hydrogels (e.g., zwitterionic networks) anchor polyiodides via cationic groups and regulate Zn2+ flux through anionic groups.

    Advances and challenges of hydrogel electrolytes for rechargeable zinc-iodine batteries · 2026 · DOI

  • The cost, manufacturability, and scalability of additional multifunctional zinc-ion capacitor components (substrates, encapsulation layers) have not been systematically evaluated. Design strategies that minimize device costs while maintaining performance in these integrated systems require investigation toward grid-scale mass production.

    Multifunctional zinc-ion capacitors for energy storage · 2026 · DOI

  • Green and scalable preparation methods for zinc-ion capacitor materials, particularly MXenes, are urgently needed to address current industrial scalability barriers. Current MXene synthesis requires high-concentration acidic environments with low yield and generates costly, environmentally hazardous acid waste, requiring development of alternative synthesis routes.

    Multifunctional zinc-ion capacitors for energy storage · 2026 · DOI

  • No standardized evaluation method exists for zinc-ion capacitor electrodes and prototype cells, making cross-comparison of electrochemical properties difficult across flexible and electrochromic ZIC systems. A comprehensive standardization protocol must specify loading density, active material components, electrode area, and key electrochemical performance parameters.

    Multifunctional zinc-ion capacitors for energy storage · 2026 · DOI

  • Long-term cycling stability of multifunctional zinc-ion capacitors under operating conditions shows only several hundred cycles achieved in working state, far below practical application requirements. The degradation mechanisms under operating conditions remain underexplored and must be systematically characterized through extended cycling studies.

    Multifunctional zinc-ion capacitors for energy storage · 2026 · DOI

  • For integrated electrochemical-storage systems like electrochromic zinc-ion capacitors (ECZ-ICs), high mass loading negatively affects electrochemical capacitor performance. The trade-off between electrochemical performance and energy storage performance in these multifunctional systems requires quantitative investigation to establish optimal loading thresholds.

    Multifunctional zinc-ion capacitors for energy storage · 2026 · DOI

  • N/P ratios and areal/volumetric energy densities of zinc-ion capacitors remain far from practical application requirements. Specific targets for N/P ratio optimization, areal energy density thresholds, and volumetric energy density benchmarks need to be established through systematic electrode design and electrolyte formulation studies.

    Multifunctional zinc-ion capacitors for energy storage · 2026 · DOI

  • However, the mechanism of HER related to solvation chemistry remains elusive, especially the time-dependent dynamic evolution of the hydrogen bond (H-bond) under an electric field.

    Unlocking Dynamic Solvation Chemistry and Hydrogen Evolution Mechanism in Aqueous Zinc Batteries · 2024 · DOI

  • Furthermore, future research should focus on revealing atomic-scale mechanisms through advanced in situ characterization and theoretical calculations, enhancing rate-performance by facilitating ion/electron diffusion, promoting cycling stability by developing highly stable cathodes and refining interface engineering, and scaling up vanadium-based cathodes for practical ZIB applications.

    Vanadium-Based Cathodes for Aqueous Zinc-Ion Batteries: Mechanisms, Challenges, and Strategies · 2024 · DOI

  • Hypervalent organoiodine compounds have been extensively utilized in organic synthesis, yet their electrochemical properties remain unexplored despite their theoretically high redox potential compared with inorganic iodine, which primarily relies on the I–/I0 redox couple in battery applications.

    Energetic Hypervalent Organoiodine Electrochemistry for Aqueous Zinc Batteries · 2024 · DOI

  • However, despite the (002) plane's lower surface energy compared to other facets, it remains unclear why this plane does not dominate zinc crystal faces during electrodeposition under normal conditions.

    Adjusting Interface Dynamics: A New Insight into the Role of Electrolyte Additive in Facilitating Highly Reversible (002)‐Textured Zinc Anode at High Current and Areal Densities · 2024 · DOI

  • The charge storage kinetics analysis relies on the Dunn's method for separating capacitive and diffusion-controlled contributions, but experimental validation of these calculated contributions is not explicitly discussed.

    Phosphorus-activated carboxyl small molecule positive electrode for high specific capacity and long-life iron-organic batteries · 2026 · DOI

  • Tremendous progress has been achieved to circumvent these issues in recent years, though a comprehensive review article for both entry-level and experienced researchers is still lacking up to date.

    Holistic optimization strategies for advanced aqueous zinc iodine batteries · 2024 · DOI

  • Despite substantial advancements in ZIBs, a comprehensive evaluation of critical parameters impacting their practical energy density ( E practical ) and calendar life is lacking.

    Zinc ion Batteries: Bridging the Gap from Academia to Industry for Grid‐Scale Energy Storage · 2024 · DOI

  • While diatomic catalysts (DACs) have demonstrated superior performance in various catalytic reactions due to their ability to facilitate synergistic charge interactions, their application in AZIBs remains unexplored.

    Diatomic Catalysts for Aqueous Zinc‐Iodine Batteries: Mechanistic Insights and Design Strategies · 2024 · DOI

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39 open questions have been extracted from the limitations and future-work passages of 739 Advanced battery technologies research papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

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