The vast polymer space hinders commercialization of solid

The gap

Evidence profile

Sourced from the stated research gap and future-work section and stated challenges and future work and abstract of the source papers, classified as general, drawn from work published between 2024 and 2026, spanning 5 journals. Those papers have been cited 359 times in total.

Supporting evidence — 8 representative gaps

• Intramolecular Design of Poly(ethylene oxide) for Solid-State Electrolytes and Next-Generation High-Energy Batteries (2026) · Nano-Micro Letters · doi

  The trade-off between ionic conductivity and mechanical strength in poly(ethylene oxide)-based solid polymer electrolytes. The lack of clear structure-property relationships to guide the design and optimization of star polymer electrolyte materials.

  generalstated research gap
  Keywords: trade-off between ionic conductivity mechanical strength poly ethylene
• De novo design of polymer electrolytes using GPT-based and diffusion-based generative models (2024) · npj Computational Materials · cited 47× · doi

  The vast polymer space hinders commercialization of solid polymer electrolytes. Low ionic conductivity is a major limitation of solid polymer electrolytes. There is a need for a systematic evaluation scheme for polymer generation.

  generalstated research gap
  Keywords: vast polymer space hinders commercialization solid electrolytes low
• Poly(Ionic Liquid) Electrolytes at an Extreme Salt Concentration for Solid-State Batteries (2024) · Journal of the American Chemical Society · cited 55× · doi

  The approach of polymer-in-salt electrolytes still faces considerable challenges, ranging from a fundamental understanding to the development of suitable polymers and salts. There is a need to understand how the ion transport behavior shifts between decoupling and coupling with the structural dynamics.

  generalstated research gap
  Keywords: approach polymer-in-salt electrolytes still faces considerable challenges ranging
• Poly(Ionic Liquid) Electrolytes at an Extreme Salt Concentration for Solid-State Batteries (2024) · Journal of the American Chemical Society · cited 55× · doi

  Further research is needed to fully understand the behavior of poly(ionic liquid)s-in-salt systems at exceptionally high Li-salt concentrations. The study suggests that adjusting the FTFSI/FSI anion ratio could be a promising approach to enhance ion diffusion.

  generalfuture-work section
  Keywords: further research needed fully understand behavior poly ionic
• Poly(Ionic Liquid) Electrolytes at an Extreme Salt Concentration for Solid-State Batteries (2024) · Journal of the American Chemical Society · cited 55× · doi

  Low cation conductivity in traditional SPEs. Limited understanding of the behavior of poly(ionic liquid)s-in-salt systems at exceptionally high Li-salt concentrations. Difficulty in achieving a stable polymer-in-salt electrolyte with high Li-salt content.

  generalstated challenges
  Keywords: low cation conductivity traditional spes limited understanding behavior
• Poly(Ionic Liquid) Electrolytes at an Extreme Salt Concentration for Solid-State Batteries (2024) · Journal of the American Chemical Society · cited 55× · doi

  This study clearly demonstrates that increasing the molten salt components in polymer-in-salt electrolytes can effectively enhance electrolyte performance. Here we would like to open a discussion on factors that should be considered for future design of polymer-in-salt electrolytes. Using molten salts with low salt crystallinity is one key factor since high salt concentrations tend to form crystalline phases that reduce electrolyte conductivity. To suppress salt crystallisation in polymer/salts melt electrolytes, Page 9/22 increasing anion asymmetry is an effective way together with the use of mixed salts, which further lower the Tg of the electrolytes and enhance ionic conductivity. Interestingly, in the polyIL-in-salt electrolyte, we found that the decoupled ion transport from structural relaxation in the medium-high salt concentration range (e.g. 1:2 here) changes to coupled ion transport at ultra-high salt concentrations. Nevertheless, the electrolyte performance has improved. Therefore, it is not always necessary to pursue highly decoupled ion transport during electrolyte design. In addition, at extreme salt concentrations, the properties of molten salts become a dominant factor in the overall electrolyte properties. We can see that both the Tg and conductivity approach those of the molten salts. Therefore, the excellent electrolyte properties of molten salts are crucial, such as the high conductivity of the molten salts should be the basic prerequisite. On the other hand, the polymer should not signicantly reduce the ionic conductivity of the molten salts. We believe that it is necessary to delve in-depth into the role of the polymer. According to our preliminary comparison of two ionic polymer matrices (polycation vs. polyanion) at high salt concentrations, the nature of the polymer does show different effects on the physicochemical properties of electrolytes, and the polycationic electrolytes have obvious advantage in achieving high conductivity, which should be associated with interactions between polymers and salts. Future comprehensive studies and comparisons of various polymer electrolyte systems will certainly help to provide more insights into the role of the polymer.

  generalfuture workevidence 5/5
  Keywords: salt polymer salts electrolyte molten electrolytes high conductivity concentrations properties ionic transport increasing enhance performance
• Ion transport and structural effects of Mn–Prussian blue analogue fillers in PEO/PVDF-based polymer electrolytes (2026) · Ionics · doi

  The incorporation of functional fillers in polymer electrolytes is a challenge that needs to be addressed. There is a lack of understanding of the relationship between structural evolution and sodium-ion transport in composite electrolytes.

  generalstated research gapevidence 5/5
  Keywords: incorporation functional fillers polymer electrolytes challenge needs addressed
• Regulating the Solvation Structure in Polymer Electrolytes for High‐Voltage Lithium Metal Batteries (2024) · Angewandte Chemie International Edition · cited 92× · doi

  However, traditional ether‐based polymer electrolytes are limited by their low lithium‐ion conductivity and narrow electrochemical window because of the well‐defined and intimated Li + ‐oxygen binding topologies in the solvation structure.

  generalabstractevidence 4/5
  Keywords: traditional ether based polymer electrolytes limited lithium conductivity narrow electrochemical window well defined intimated oxygen

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