Home > Press > Nanoparticles in lithium-sulphur batteries detected with neutron experiment
![]() |
The operando cell was developed at HZB and allows to analyse processes inside the battery during charging cycles with neutrons. © S. Risse/HZB |
Abstract:
Lithium-sulphur batteries are regarded as one of the most promising candidates for the next generation of energy storage devices. They have a theoretical gravimetric energy density that is five times higher than that of the best lithium-ion batteries currently available. And they even work at sub-zero temperatures of down to -50 °C. In addition, sulphur is inexpensive and environmentally friendly.
However, their capacity so far has fallen sharply with every charge-discharge cycle, so that such batteries are not yet long-lasting. The loss of capacity is caused by complicated reaction processes at the electrodes inside the battery cell. It is therefore particularly important to understand exactly how the charge (sulphur) and discharge (lithium sulphide) products precipitate and dissolve. While sulphur precipitates macroscopically and therefore lends itself to examination by imaging techniques or X-ray diffraction during cycling, lithium sulphide is difficult to detect due to its sub-10-nm particle size.
Insight into this has now been provided for the first time by investigations with the BER II neutron source at the HZB. Dr. Sebastian Risse used a measuring cell he developed to illuminate lithium-sulphur batteries with neutrons during charging and discharging cycles (operando) and simultaneously performed additional measurements with impedance spectroscopy.
This enabled him and his team to analyse the dissolution and precipitation of lithium sulphide with extreme precision during ten discharge/charging cycles. Since neutrons interact strongly with deuterium (heavy hydrogen), the researchers used a deuterated electrolyte in the battery cell to make both the solid products (sulphur and lithium sulphide) visible.
Their conclusion: "We observed that the lithium sulphide and sulphur precipitation does not take place inside the microporous carbon electrodes, but instead on the outer surface of the carbon fibres", says Risse. These results provide a valuable guide for the development of better battery electrodes.
####
For more information, please click here
Contacts:
Antonia Roetger
Contact the expert:
Dr. rer. nat. Sebastian Risse
(030) 8062 - 43022
Copyright © Helmholtz-Zentrum Berlin für Materialien und Energie
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.
Related Links |
Related News Press |
News and information
Generating power where seawater and river water meet July 22nd, 2022
First electric nanomotor made from DNA material: Synthetic rotary motors at the nanoscale perform mechanical work July 22nd, 2022
Possible Futures
Generating power where seawater and river water meet July 22nd, 2022
First electric nanomotor made from DNA material: Synthetic rotary motors at the nanoscale perform mechanical work July 22nd, 2022
Discoveries
HKU physicists found signatures of highly entangled quantum matter July 22nd, 2022
Buckyballs on gold are less exotic than graphene July 22nd, 2022
Announcements
Quantum computer works with more than zero and one: Quantum digits unlock more computational power with fewer quantum particles July 22nd, 2022
Generating power where seawater and river water meet July 22nd, 2022
First electric nanomotor made from DNA material: Synthetic rotary motors at the nanoscale perform mechanical work July 22nd, 2022
Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters
Buckyballs on gold are less exotic than graphene July 22nd, 2022
Quantum computer works with more than zero and one: Quantum digits unlock more computational power with fewer quantum particles July 22nd, 2022
Generating power where seawater and river water meet July 22nd, 2022
Battery Technology/Capacitors/Generators/Piezoelectrics/Thermoelectrics/Energy storage
Lithiophilic seeds and rigid arrays synergistic induced dendrite-free and stable Li anode towards long-life lithium-oxygen batteries July 22nd, 2022
Crystal phase engineering offers glimpse of future potential, researchers say July 15th, 2022
Sieving carbons: Ideal anodes for high-energy sodium-ion batteries July 1st, 2022
Two opposing approaches could give lithium-sulfur batteries a leg up over lithium-ion July 1st, 2022
![]() |
||
![]() |
||
The latest news from around the world, FREE | ||
![]() |
![]() |
||
Premium Products | ||
![]() |
||
Only the news you want to read!
Learn More |
||
![]() |
||
Full-service, expert consulting
Learn More |
||
![]() |