Related Experiment Video
Updated: Jun 15, 2025
08:07
Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates
Published on: June 18, 2013
15.0K
Lithium-ion conducting self-assembled organic nanowires: optimizing mechanical performance and ionic conductivity
Vishwakarma Ravikumar Ramlal1,2, Sam Sankar Selvasundarasekar3, Akanksha Singh1,2
1Analytical and Environmental Science Division and Centralized Instrument Facility, CSIR-Central Salt and Marine Chemicals Research Institute Bhavnagar Gujarat-364002 India akmandal@csmcri.res.in.
Chemical Science
|June 13, 2025
Summary
Researchers developed self-assembled organic nanowires for safer, resilient solid-state lithium-ion conductors. Precise hydrogen bonding significantly improved ionic conductivity and mechanical strength for advanced battery materials.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Wearable devices require advanced battery materials with high ionic conductivity, safety, and mechanical resilience.
- Solid-state lithium-ion conductors face a trade-off between ionic conductivity and mechanical integrity.
- Supramolecular design offers a strategy to overcome limitations in current battery materials.
Purpose of the Study:
- To explore supramolecular design for enhancing ionic conductivity and mechanical resilience in solid-state lithium-ion conductors.
- To investigate the role of noncovalent interactions, specifically hydrogen bonding, in tuning material properties.
- To develop solution-processable self-assembled organic nanowires (SONs) for improved battery performance.
Main Methods:
- Fabrication of self-assembled organic nanowires (SONs) with varied supramolecular interactions via structural mutation.
- Characterization of mechanical properties, including Young's modulus and toughness.
- Measurement of ionic conductivity and lithium-ion transference number.
- Molecular dynamics simulations to elucidate ion transport mechanisms.
Main Results:
- Precise hydrogen bonding was identified as critical for achieving superior mechanical properties (Young's modulus: 1050.5 ± 38 MPa, toughness: 15,666 ± 423 kJ m⁻³).
- Structured H-bonded morphology enhanced lithiation and led to the highest ionic conductivity (3.12 × 10⁻⁴ S cm⁻¹).
- Lithium-ion transference number reached 0.8 at 298 K.
- Molecular dynamics simulations revealed preferential axial hopping of Li-ions.
Conclusions:
- Supramolecular design, particularly through controlled hydrogen bonding, effectively overcomes the conductivity-mechanical resilience trade-off in solid-state Li-ion conductors.
- The developed SONs demonstrate significant potential for next-generation wearable device batteries.
- This study provides a foundational methodology for designing advanced ion-conducting materials based on nanoscale assemblies and noncovalent interactions.
