... studie staat sinds 12 januari in Nature, met alle toeters en bellen figuurtjes
Citaat:
https://www.nature.com/articles/s41467-021-27861-w
Published: 12 January 2022
Multifactorial engineering of biomimetic membranes for batteries with multiple high-performance parameters
Abstract
Lithium–sulfur (Li–S) batteries have a high specific capacity, but lithium polysulfide (LPS) diffusion and lithium dendrite growth drastically reduce their cycle life. High discharge rates also necessitate their resilience to high temperature. Here we show that biomimetic self-assembled membranes from aramid nanofibers (ANFs) address these challenges. Replicating the fibrous structure of cartilage, multifactorial engineering of ion-selective mechanical, and thermal properties becomes possible. LPS adsorption on ANF surface creates a layer of negative charge on nanoscale pores blocking LPS transport. The batteries using cartilage-like bioinspired ANF membranes exhibited a close-to-theoretical-maximum capacity of 1268 mAh g_1, up to 3500+ cycle life, and up to 3C discharge rates. Essential for safety, the high thermal resilience of ANFs enables operation at temperatures up to 80°C. The simplicity of synthesis and recyclability of ANFs open the door for engineering high-performance materials for numerous energy technologies.
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Citaat:
https://www.greencarcongress.com/202...Communications
U Mich team develops 1,000-cycle lithium-sulfur battery
12 January 2022
A University of Michigan team has shown that a network of aramid nanofibers, recycled from Kevlar, can enable lithium-sulfur batteries to overcome their Achilles heel of cycle life, delivering an estimated 1,000 real-world cycles. A paper on their work is published in Nature Communications.
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Commentaar van @Wiredsim ff vertalen
“De batterijen die gebruik maakten van kraakbeenachtige bio-geïnspireerde ANF-membranen vertoonden een bijna theoretische maximale capaciteit van 1268 mAh g_1, een levensduur tot 3500 laadcyclussen en een ontladingssnelheid tot 3C. De hoge thermische veerkracht van ANF's is essentieel voor de veiligheid en maakt het mogelijk om te werken bij temperaturen tot 80°C.
”
Zeer indrukwekkend - klinkt te mooi om waar te zijn. Revolutionair als het levensvatbaar blijkt te zijn.
Citaat:
Gepost door: Wiredsim | 12 januari 2022
Wiredsim
“ The batteries using cartilage-like bioinspired ANF membranes exhibited a close-to-theoretical-maximum capacity of 1268 mAh g_1, up to 3500+ cycle life, and up to 3C discharge rates. Essential for safety, the high thermal resilience of ANFs enables operation at temperatures up to 80 °C.”
Very impressive- sounds too good to be true. Revolutionary if proves to be viable.
Posted by: Wiredsim | 12 January 2022
negative charges repelled the lithium polysulfide ions
Nice
Posted by: SJC | 13 January 2022 at 06:39 AM
sd
I do not know if this is THE solution but there is enough research work on Lithium Sulfur so I am fairly sure that there will be a one or more solutions found. Maybe Lyten with graphene encapsulation or Monash University's sweet (sugar based) solution. Even after one or more good solutions is found, it will take some time to find economic manufacturing techniques and to ramp up production. However, if there is an economic solution with high energy density, fast charge rate, and good life, it will be a real game changer which will allow battery electric long haul trucks, private vehicles with 600 mile plus range, commuter and other short to medium range aircraft, etc.
Posted by: sd | 13 January 2022 at 07:44 AM
peskanov
The paper does not tell about energy density, but common Li-S batteries are 1.7-2.5V.
They claim capacity of 1268 mah/g, therefore, I understand they got >1000 wh/kg!
The future of Li-S is looking really nice.
Posted by: peskanov | 14 January 2022
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Het is uiteraard geen opgefriste V8-plofmotor met driedubbele turbo met laatste nieuwe SCR-katalyator en 4 fake uitlaatpijpen.
