skip to main content
US FlagAn official website of the United States government
dot gov icon
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
https lock icon
Secure .gov websites use HTTPS
A lock ( lock ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.


Title: Structuring electrodes via acoustic-field-assisted particle patterning for enhanced performance of lithium-ion batteries
An acoustic particle patterning method generated ordered structures in battery electrodes to facilitate lithium-ion diffusion and charge transport kinetics, allowing superior rate capability and cycling stability over conventional electrodes.  more » « less
Award ID(s):
1752378
PAR ID:
10491395
Author(s) / Creator(s):
; ;
Publisher / Repository:
Royal Society of Chemistry
Date Published:
Journal Name:
Journal of Materials Chemistry A
Volume:
11
Issue:
22
ISSN:
2050-7488
Page Range / eLocation ID:
11849 to 11858
Subject(s) / Keyword(s):
Lithium-ion batteries acoustic-assisted particle patterning electrode structural engineering ion diffusion charge transport kinetics rate capability cycling stability
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
More Like this
  1. In situoptical measurements can reveal bandgap changes in monolayer semiconductor electrodes. 
    more » « less
  2. Triple-barrel electrodes can monitor temperature and freezing events in microdroplets in real time, delivering enhanced temporal resolution and standalone insights into the ice nucleation and the thermoelectrochemical properties of aqueous systems. 
    more » « less
  3. Small electrodes capable of detecting Mn dissolution and oxygen evolution are placed near operating Mn-based lithium-ion battery cathodes to track their degradation, informing on mechanism and revealing how additives might help decrease degradation. 
    more » « less
  4. Recent efforts towards energy scavenging with eco-friendly methods and abundant water look very promising for powering wearables and distributed electronics. However, the time duration of electricity generation is typically too short, and the current level is not sufficient to meet the required threshold for the proper operation of electronics despite the relatively large voltage. This work newly introduced an electrochemical method in combination with hydro-effects in order to extend the energy scavenging time and boost the current. Our device consists of corroded porous steel electrodes whose corrosion overpotential was lowered when the water concentration was increased and vice versa . Then a potential difference was created between two electrodes, generating electricity via the hydro-electrochemical method up to an open-circuit voltage of 750 mV and a short-circuit current of 90 μA cm −2 . Furthermore, electricity was continuously generated for more than 1500 minutes by slow water diffusion against gravity from the bottom electrode. Lastly, we demonstrated that our hydro-electrochemical power generators successfully operated electronics, showing the feasibility of offering electrical power for sufficiently long time periods in practice. 
    more » « less
  5. Abstract Electrochemical energy systems rely on particulate porous electrodes to store or convert energies. While the three‐dimensional (3D) porous structures are introduced to maximize the interfacial area for better overall performance of the system, spatiotemporal heterogeneities arising from materials thermodynamics are localizing the charge transfer processes onto a limited portion of the available interfaces. Here, a simple but precise method is demonstrated to directly track and analyze theoperando(i.e., local and working) interfaces on the mesoscale in a practical graphite porous electrode to obtain the true local current density, which turns out to be two orders of magnitude higher than the globally averaged current density adopted by existing studies. The results shed light on the long‐standing discrepancies in kinetics parameters derived from electroanalytical measurements and from first principle predictions. Contradictory to prevailing beliefs, the electrochemical dynamics are not controlled by the solid‐state diffusion process once the spatiotemporal reaction heterogeneities emerge. 
    more » « less