Saturday, December 9, 2023
SCIENMAG: Latest Science and Health News
No Result
View All Result
  • Login
  • HOME PAGE
  • BIOLOGY
  • CHEMISTRY AND PHYSICS
  • MEDICINE
    • Cancer
    • Infectious Emerging Diseases
  • SPACE
  • TECHNOLOGY
  • CONTACT US
  • HOME PAGE
  • BIOLOGY
  • CHEMISTRY AND PHYSICS
  • MEDICINE
    • Cancer
    • Infectious Emerging Diseases
  • SPACE
  • TECHNOLOGY
  • CONTACT US
No Result
View All Result
Scienmag - Latest science news from science magazine
No Result
View All Result
Home SCIENCE NEWS Social & Behavioral Science

Oxidation-tolerant solid electrolyte provides high energy capacity for Li2S cathode

October 28, 2021
in Social & Behavioral Science
0
Share on FacebookShare on Twitter

Recent advances on materials in development since the 1980’s at Osaka Prefecture University (OPU) bring all-solid-state batteries (ASSBs) a step closer towards reality.

Schematic illustration of the discharge of ASSBs

Credit: A. Sakuda, OSAKA PREFECTURE UNIVERSITY

Recent advances on materials in development since the 1980’s at Osaka Prefecture University (OPU) bring all-solid-state batteries (ASSBs) a step closer towards reality.

ASSBs use a solid electrolyte (SE) that separates the energy-generating parts (cathodes and anodes) and has attracted attention as a safer, higher energy and power alternative to the inflammable liquid or gel electrolytes found in lithium-ion batteries. However, one major issue has been achieving ASSB energy densities that can match and potentially exceed those of Li-ion batteries.

In past work done at OPU, ASSBs with a cathode made up of a solid solution of lithium sulfide (Li2S) and lithium iodide were produced and found that during charge and discharge, the lithium iodide functioned as an ionic conduction path in the Li2S. This resulted in a higher energy capacity of the battery, suggesting that the key to increasing capacity was found in the nature of the lithium iodide conductor.  

The team set out to explore this relationship by focusing on the electrochemical window of SEs – something that had been overestimated in previous calculations.

“Understanding the practical electrochemical window of SE for cathodes and anodes would allow for the construction of more efficient active material-SE interfaces and in turn support future research in increasing ASSB energy densities”, states Professor Akitoshi Hayashi. 

Prof. Hayashi, together with a research team from the Department of Applied Chemistry, OPU Graduate School of Engineering, employed linear sweep voltammetry to investigate the oxidation onset voltages (OOVs) of SEs. They found that the OOVs of SEs employed in ASSBs with Li2S positive electrodes must exceed that of the Li2S by 0.2 V to achieve high energy capacity. 

“Finding the acceptable electrochemical window for high-capacity charges is only half the solution”, states Professor Atsushi Sakuda. “The next step was to discharge all this energy, which depended on the ionic conductivity of the SE”. 

Here, the team explored the oxidation stabilities of several lithium salts and found that nanocomposite electrode composed of Li2S and pseudobinary Li-oxyacid salts, which had been discovered by research done in 1987 by the university’s current President Masahiro Tatsumisago, showed the best performance in the reported all-solid-state Li2S batteries. “We developed a Li2S-based nanocomposite cathode with a SE having both resistance to electrochemical decomposition and relatively high ionic conductivity”, states Dr. Takashi Hakari.  

The insight obtained from this study allowed the team to fabricate a high capacity Li2S-based nanocomposite cathode using a solid electrolyte with oxidation tolerance. The next step for the research team is to turn this creation into an all-solid-state lithium-sulfur battery with twice the energy density of a lithium-ion battery.

Funding
The Japan Science and Technology Agency (JST) Strategic Research Promotion Program, Advanced Low Carbon Technology Development, Special Priority Technology Area “Next Generation Battery” (ALCA-SPRING) (JPMJAL1301).

###

About Osaka Prefecture University, Japan 
Osaka Prefecture University (OPU) is one of the largest public universities in Japan. 
OPU comprises three campuses, with a main campus in Sakai, Osaka. With four colleges for undergraduate students and seven graduate schools, the university offers stellar education in a myriad of fields like engineering, life and environmental sciences, science, economics, humanities and social sciences, and nursing. Not just this, the university also houses various international students, who can enrich their lives with opportunities for internships and exchange programs.
In April 2022, OPU will unite with Osaka City University (OCU) to form Japan’s largest public university, Osaka Metropolitan University.

For more details, please visit:
Osaka Prefecture University (OPU): https://www.osakafu-u.ac.jp/en
Osaka Metropolitan University: https://www.upc-osaka.ac.jp/new-univ/en-research/



Journal

Advanced Functional Materials

Method of Research

News article

Subject of Research

Not applicable

Article Title

Solid electrolyte with oxidation tolerance provides a high-capacity Li2S-based positive electrode for all-solid-state Li/S batteries

Article Publication Date

28-Oct-2021

Tags: capacitycathodeelectrolyteenergyhighLi2SOxidationtolerantsolid
Share26Tweet16Share4ShareSendShare
  • Focus on Fusion

    Rochester’s Laser Lab heads new national inertial fusion energy hub

    69 shares
    Share 28 Tweet 17
  • Doctors discover many patients at UNC’s Inflammatory Bowel Disease Clinic screen positive for malnutrition

    65 shares
    Share 26 Tweet 16
  • Anglia Ruskin named University of the Year 2023

    65 shares
    Share 26 Tweet 16
  • Study reshapes understanding of mass extinction in Late Devonian era

    72 shares
    Share 29 Tweet 18
  • Wayne State University announces creation of two research centers and institutes that aim to impact the health of Detroiters and beyond

    67 shares
    Share 27 Tweet 17
  • When is an aurora not an aurora?

    64 shares
    Share 26 Tweet 16
ADVERTISEMENT

About us

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

Latest NEWS

Study finds plant nurseries are exacerbating the climate-driven spread of 80% of invasive species

Researchers predict climate change-driven reduction in beneficial plant microbes

New study highlights COVID-19’s adaptive strategy for infection

Subscribe to Blog via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 208 other subscribers

© 2023 Scienmag- Science Magazine: Latest Science News.

No Result
View All Result
  • HOME PAGE
  • BIOLOGY
  • CHEMISTRY AND PHYSICS
  • MEDICINE
    • Cancer
    • Infectious Emerging Diseases
  • SPACE
  • TECHNOLOGY
  • CONTACT US

© 2023 Scienmag- Science Magazine: Latest Science News.

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