skip to main content


Title: A diffuse interface method for solid-phase modeling of regression behavior in solid composite propellants
Award ID(s):
2017917
NSF-PAR ID:
10373840
Author(s) / Creator(s):
; ;
Date Published:
Journal Name:
Combustion and Flame
Volume:
242
Issue:
C
ISSN:
0010-2180
Page Range / eLocation ID:
112219
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
More Like this
  1. Abstract

    As solid‐state batteries (SSBs) with lithium (Li) metal anodes gain increasing traction as promising next‐generation energy storage systems, a fundamental understanding of coupled electro‐chemo‐mechanical interactions is essential to design stable solid‐solid interfaces. Notably, uneven electrodeposition at the Li metal/solid electrolyte (SE) interface arising from intrinsic electrochemical and mechanical heterogeneities remains a significant challenge. In this work, the thermodynamic origins of mechanics‐coupled reaction kinetics at the Li/SE interface are investigated and its implications on electrodeposition stability are unveiled. It is established that the mechanics‐driven energetic contribution to the free energy landscape of the Li deposition/dissolution redox reaction has a critical influence on the interface stability. The study presents the competing effects of mechanical and electrical overpotential on the reaction distribution, and demarcates the regimes under which stress interactions can be tailored to enable stable electrodeposition. It is revealed that different degrees of mechanics contribution to the forward (dissolution) and backward (deposition) reaction rates result in widely varying stability regimes, and the mechanics‐coupled kinetics scenario exhibited by the Li/SE interface is shown to depend strongly on the thermodynamic and mechanical properties of the SE. This work highlights the importance of discerning the underpinning nature of electro‐chemo‐mechanical coupling toward achieving stable solid/solid interfaces in SSBs.

     
    more » « less
  2. Abstract

    The solid–solid electrode–electrolyte interface represents an important component in solid‐state batteries (SSBs), as ionic diffusion, reaction, transformation, and restructuring could all take place. As these processes strongly influence the battery performance, studying the evolution of the solid–solid interfaces, particularly in situ during battery operation, can provide insights to establish the structure–property relationship for SSBs. Synchrotron X‐ray techniques, owing to their unique penetration power and diverse approaches, are suitable to investigate the buried interfaces and examine structural, compositional, and morphological changes. In this review, we will discuss various surface‐sensitive synchrotron‐based scattering, spectroscopy, and imaging methods for the in situ characterization of solid–solid interfaces and how this information can be correlated to the electrochemical properties of SSBs. The goal is to overview the advantages and disadvantages of each technique by highlighting representative examples, so that similar strategies can be applied by battery researchers and beyond to study similar solid‐solid interface systems.

     
    more » « less
  3. null (Ed.)
  4. Abstract

    Joining biology with materials science requires the ability to design, engineer and control biology/solid‐state materials interfaces at the molecular level. The specific molecular interactions that take place among biomolecules, known as molecular recognition, enable all aspects of molecular processes in living systems prerequisite to the biological functions. Having the ability to establish specific biological interactions between the solid materials and biological constituents is essential for precise design of biologically viable soft interfaces that are molecularly tailored at solid surfaces. Solid‐binding peptides offer excellent opportunities in surface biofunctionalization over the traditionally utilized chemical approaches which generally make use of covalent bonds for surface molecular attachments with limited flexibility. Solid‐binding peptides are selected using directed evolution techniques using genotype to phenotype relationships and therefore referred also as genetically engineered peptides for inorganics (GEPI) and exclusively bind to solid materials using molecular recognition. Here, the peptide has weak interactions at multiple contact points that are established between the biomolecule and the solid lattice, and then folds into a conformation coherent with the underlying solid lattice through self‐organization on the surface. Solid‐binding peptides provide an unprecedented biological advantage as modular building blocks to couple biological and synthetic entities at the bio–solid interfaces. Taking full advantage of biology's versatility, they can easily be engineered to form chimeric molecules with inherent multifunctionality displaying biofunctional molecular entities, such as enzymes, co‐factors, antimicrobial peptides, antibodies, nucleic acids and molecular probes that target biomarkers. This minireview provides an insight into the key principles of solid‐binding peptides for advancing surfaces biofunctionalization by a selected set of examples on chimeric functions built upon linking, displaying and assembling functional molecular moieties at solid surfaces ranging from enzymatic biocatalysis to antimicrobial coatings. Modular multifunctional peptide design offers to tune molecular processes with coupled biological functions for a wide variety of applications in biotechnology, nanotechnology and medicine.

     
    more » « less