Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



Home > Press > In-situ nanoscale insights into the evolution of solid electrolyte interphase shells

The SEI shells evolution processes and degradation mechanism at the electrode/electrolyte interface.

CREDIT
©Science China Press
The SEI shells evolution processes and degradation mechanism at the electrode/electrolyte interface. CREDIT ©Science China Press

Abstract:
The interfacial decomposition products forming the so-called solid-electrolyte interphase (SEI) during the first charging/discharging significantly determine the electrochemical performances of lithium (Li) batteries. To date, the dynamic evolutions, chemical compositions, stabilities and the influencing factors of the SEI films have been captured tremendous attentions.

In-situ nanoscale insights into the evolution of solid electrolyte interphase shells

Beijing, China | Posted on April 2nd, 2021

It's noted that, in contrast to the SEI film formation at the surface of electrodes, a kind of SEI shells usually conformally forms at the outmost layer of the on-site deposited Li once the freshly deposited Li contacts with the electrolyte, which could directly influence Li nucleation, growth behaviors and electrochemical properties at the electrode/electrolyte interface.

Furthermore, the chemical/morphological instabilities of the on-site formed SEI shell pose challenges for the in-situ characterizations. Directly capturing the dynamic evolution of the SEI shells is crucial to interprete their impacts on the anode/elelctrolyte interface and battery performances.

The electrochemical atomic force microscopy (EC-AFM) enables the real-time characterization of the morphology change, mechanical modulus and potential/current distribution at the electrode/electrolyte interface under working conditions, providing an important in-situ analysis method with high spatial resolution for exploring the dynamic evolution of the on-site formed SEI shell on the deposited Li.

Recently, Prof. Li-Jun Wan and Prof. Rui Wen et al. provide the straightforward visualized evidence of SEI shells evolution during Li deposition/stripping to reveal anode degradation via in-situ EC-AFM.

During Li deposition, the quasi-spherical Li particles nucleate and grow on a Cu electrode. Subsequently, the collapse of the SEI shells is distinctly captured with the continuous Li stripping. As the cycling progresses, new Li deposits are prone to renucleating on the deposit-free sites with higher electrochemical activity. The fresh SEI shells form on freshly-deposited Li while the original SEI shells retain their collapsed morphology at the same position. Severe SEI regeneration/collapse along with electrolyte depletion and interfacial impedance increasing take one of the responsiblities for the degradation of anodes.

This work reveals the interfacial evolution at nanoscale, provides deep insights into the fundamental comprehension of SEI properties and further guides improvement strategies of the interface design in Li batteries.

####

For more information, please click here

Contacts:
Rui Wen

Copyright © Science China Press

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

See the article: Shi Y, Liu GX, Wan J, Wen R, Wan LJ. In-situ nanoscale insights into the evolution of solid electrolyte interphase shells: revealing interfacial degradation in lithium metal batteries. Sci China Chem, 2021, 64, doi:10.1007/s11426-020-9984-9:

Related News Press

News and information

Researchers develop artificial building blocks of life March 8th, 2024

How surface roughness influences the adhesion of soft materials: Research team discovers universal mechanism that leads to adhesion hysteresis in soft materials March 8th, 2024

Two-dimensional bimetallic selenium-containing metal-organic frameworks and their calcinated derivatives as electrocatalysts for overall water splitting March 8th, 2024

Curcumin nanoemulsion is tested for treatment of intestinal inflammation: A formulation developed by Brazilian researchers proved effective in tests involving mice March 8th, 2024

Possible Futures

Two-dimensional bimetallic selenium-containing metal-organic frameworks and their calcinated derivatives as electrocatalysts for overall water splitting March 8th, 2024

Curcumin nanoemulsion is tested for treatment of intestinal inflammation: A formulation developed by Brazilian researchers proved effective in tests involving mice March 8th, 2024

The Access to Advanced Health Institute receives up to $12.7 million to develop novel nanoalum adjuvant formulation for better protection against tuberculosis and pandemic influenza March 8th, 2024

Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM March 8th, 2024

Discoveries

What heat can tell us about battery chemistry: using the Peltier effect to study lithium-ion cells March 8th, 2024

Researchers’ approach may protect quantum computers from attacks March 8th, 2024

High-tech 'paint' could spare patients repeated surgeries March 8th, 2024

Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM March 8th, 2024

Announcements

What heat can tell us about battery chemistry: using the Peltier effect to study lithium-ion cells March 8th, 2024

Curcumin nanoemulsion is tested for treatment of intestinal inflammation: A formulation developed by Brazilian researchers proved effective in tests involving mice March 8th, 2024

The Access to Advanced Health Institute receives up to $12.7 million to develop novel nanoalum adjuvant formulation for better protection against tuberculosis and pandemic influenza March 8th, 2024

Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM March 8th, 2024

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

Researchers develop artificial building blocks of life March 8th, 2024

How surface roughness influences the adhesion of soft materials: Research team discovers universal mechanism that leads to adhesion hysteresis in soft materials March 8th, 2024

Curcumin nanoemulsion is tested for treatment of intestinal inflammation: A formulation developed by Brazilian researchers proved effective in tests involving mice March 8th, 2024

Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM March 8th, 2024

Battery Technology/Capacitors/Generators/Piezoelectrics/Thermoelectrics/Energy storage

What heat can tell us about battery chemistry: using the Peltier effect to study lithium-ion cells March 8th, 2024

Two-dimensional bimetallic selenium-containing metal-organic frameworks and their calcinated derivatives as electrocatalysts for overall water splitting March 8th, 2024

Discovery of new Li ion conductor unlocks new direction for sustainable batteries: University of Liverpool researchers have discovered a new solid material that rapidly conducts lithium ions February 16th, 2024

A battery’s hopping ions remember where they’ve been: Seen in atomic detail, the seemingly smooth flow of ions through a battery’s electrolyte is surprisingly complicated February 16th, 2024

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project