• HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
Thursday, August 21, 2025
BIOENGINEER.ORG
No Result
View All Result
  • Login
  • HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
  • HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
No Result
View All Result
Bioengineer.org
No Result
View All Result
Home NEWS Science News Chemistry

Scientists learn more about the first hours of a lithium-ion battery’s life

Bioengineer by Bioengineer
February 5, 2020
in Chemistry
Reading Time: 4 mins read
0
Share on FacebookShare on TwitterShare on LinkedinShare on RedditShare on Telegram

New technology enables nanoscale molecular view of self-assembling gateway structure within

IMAGE

Credit: Photo by Andrea Starr/PNNL


The first hours of a lithium-ion battery’s life largely determine just how well it will perform. In those moments, a set of molecules self-assembles into a structure inside the battery that will affect the battery for years to come.

This component, known as the solid-electrolyte interphase or SEI, has the crucial job of blocking some particles while allowing others to pass, like a tavern bouncer rejecting undesirables while allowing in the glitterati. The structure has been an enigma for scientists who have studied it for decades. Researchers have tapped multiple techniques to learn more but never — until now — had they witnessed its creation at a molecular level.

Knowing more about the SEI is a crucial step on the road to creating more energetic, longer-lasting and safer lithium-ion batteries.

The work published Jan. 27 in Nature Nanotechnology was performed by an international team of scientists led by researchers at the U.S. Department of Energy’s Pacific Northwest National Laboratory and the U.S. Army Research Laboratory. Corresponding authors include Zihua Zhu, Chongmin Wang and Zhijie Xu of PNNL and Kang Xu of the U.S. Army Research Laboratory.

Why lithium-ion batteries work at all: the SEI

The solid-electrolyte interphase is a very thin film of material that doesn’t exist when a battery is first built. Only when the battery is charged for the very first time do molecules aggregate and electrochemically react to form the structure, which acts as a gateway allowing lithium ions to pass back and forth between the anode and cathode. Crucially, the SEI forces electrons to take a detour, which keeps the battery operating and makes energy storage possible.

It’s because of the SEI that we have lithium-ion batteries at all to power our cell phones, laptops and electric vehicles.

But scientists need to know more about this gateway structure. What factors separate the glitterati from the riffraff in a lithium-ion battery? What chemicals need to be included in the electrolyte, and in what concentrations, for the molecules to form themselves into the most useful SEI structures so they don’t continually sop up molecules from the electrolyte, hurting battery performance?

Scientists work with a variety of ingredients, predicting how they will combine to create the best structure. But without more knowledge about how the solid-electrolyte interphase is created, scientists are like chefs juggling ingredients, working with cookbooks that are only partially written.

Exploring lithium-ion batteries with new technology

To help scientists better understand the SEI more, the team used PNNL’s patented technology to analyze the structure as it was created. Scientists used an energetic ion beam to tunnel into a just-forming SEI in an operating battery, sending some of the material airborne and capturing it for analysis while relying on surface tension to help contain the liquid electrolyte. Then the team analyzed the SEI components using a mass spectrometer.

The patented approach, known as in situ liquid secondary ion mass spectrometry or liquid SIMS, allowed the team to get an unprecedented look at the SEI as it formed and sidestep problems presented by a working lithium-ion battery. The technology was created by a team led by Zhu, building on previous SIMS work by PNNL colleague Xiao-Ying Yu.

“Our technology gives us a solid scientific understanding of the molecular activity in this complex structure,” said Zhu. “The findings could potentially help others tailor the chemistry of the electrolyte and electrodes to make better batteries.”

U.S. Army and PNNL researchers collaborate

The PNNL team connected with Kang Xu, a research fellow with the U.S. Army Research Laboratory and an expert on electrolyte and the SEI, and together they tackled the question.

The scientists confirmed what researchers have suspected — that the SEI is composed of two layers. But the team went much further, specifying the precise chemical make-up of each layer and determining the chemical steps that occur in a battery to bring about the structure.

The team found that one layer of the structure, next to the anode, is thin but dense; this is the layer that repels electrons but allows lithium ions to pass through. The outer layer, right next to the electrolyte, is thicker and mediates interactions between the liquid and the rest of the SEI. The inner layer is a bit harder and the outer later is more liquidy, a little bit like the difference between undercooked and overcooked oatmeal.

The role of lithium fluoride

One result of the study is a better understanding of the role of lithium fluoride in the electrolyte used in lithium-ion batteries. Several researchers, including Kang Xu, have shown that batteries with SEIs richer in lithium fluoride perform better. The team showed how lithium fluoride becomes part of the inner layer of the SEI, and the findings offer clues about how to incorporate more fluorine into the structure.

“With this technique, you learn not only what molecules are present but also how they’re structured,” Wang says. “That’s the beauty of this technology.”

The PNNL portion of the research published in Nature Nanotechnology was funded by PNNL, DOE’s Office of Energy Efficiency and Renewable Energy’s Vehicle Technologies Office, and the U.S.-Germany Cooperation on Energy Storage. Kang Xu’s work was funded by DOE’s Office of Science Joint Center for Energy Storage Research. The liquid SIMS analysis was done at EMSL, the Environmental Molecular Sciences Laboratory, a DOE Office of Science user facility located at PNNL.

In addition to Xu, Wang and Zhu, PNNL authors include Yufan Zhou, Mao Su, Xiafei Yu, Yanyan Zhang, Jun-Gang Wang, Xiaodi Ren, Ruiguo Cao, Wu Xu, Donald R. Baer and Yingge Du.

###

Media Contact
Tom Rickey
[email protected]

Related Journal Article

http://dx.doi.org/10.1038/s41565-019-0618-4

Tags: Chemistry/Physics/Materials SciencesElectrical Engineering/ElectronicsEnergy/Fuel (non-petroleum)Materials
Share12Tweet8Share2ShareShareShare2

Related Posts

blank

Innovative Research Paves the Way for Greener, Faster Metal Production

August 21, 2025
Scientists Harness Electrochemistry to Enhance Nuclear Fusion Rates

Scientists Harness Electrochemistry to Enhance Nuclear Fusion Rates

August 21, 2025

Groundbreaking Supernova Discovery Unveils the Inner Secrets of a Dying Star

August 21, 2025

New “In and Out” Mechanism Uncovers How Carbon Dioxide Interacts with Water’s Surface

August 20, 2025
Please login to join discussion

POPULAR NEWS

  • blank

    Molecules in Focus: Capturing the Timeless Dance of Particles

    141 shares
    Share 56 Tweet 35
  • Neuropsychiatric Risks Linked to COVID-19 Revealed

    81 shares
    Share 32 Tweet 20
  • Modified DASH Diet Reduces Blood Sugar Levels in Adults with Type 2 Diabetes, Clinical Trial Finds

    60 shares
    Share 24 Tweet 15
  • Predicting Colorectal Cancer Using Lifestyle Factors

    47 shares
    Share 19 Tweet 12

About

We bring you the latest biotechnology news from best research centers and universities around the world. Check our website.

Follow us

Recent News

Proximity Screening Boosts Graphene’s Electronic Quality

Revolutionary Laser Technique Simplifies Production of High-Performance Alloy Films

New Study Reveals 40% Decline in Leisure Reading Over Two Decades

  • Contact Us

Bioengineer.org © Copyright 2023 All Rights Reserved.

Welcome Back!

Login to your account below

Forgotten Password?

Retrieve your password

Please enter your username or email address to reset your password.

Log In
No Result
View All Result
  • Homepages
    • Home Page 1
    • Home Page 2
  • News
  • National
  • Business
  • Health
  • Lifestyle
  • Science

Bioengineer.org © Copyright 2023 All Rights Reserved.