Better Solid State Lithium Ion Batteries

Deakin materials scientists have proven that liquid solvent-free solid state batteries can easily be made which will enable safer batteries with higher energy density.

Joule – Poly(Ionic Liquid)s-in-Salt Electrolytes with Co-coordination-Assisted Lithium-Ion Transport for Safe Batteries

• A solvent-free poly(ionic liquid)s-in-salt electrolyte is demonstrated
• A co-coordination-assisted Li + transport is proposed for enhanced transference number
• Lithium-metal batteries with high cathode loadings are demonstrated at 80°C

Polymer electrolytes are seen as key components for safe, high-energy-density all-solid-state lithium (Li) batteries, given their appropriate mechanical properties along with the absence of volatile and flammable solvents. Here, we report a class of solvent-free polymer electrolytes by using poly(diallyldimethylammonium) bis(fluorosulfonyl)imide (PDADMA FSI) and a high content of Li bis(fluorosulfonyl)imide (LiFSI) salt. A homogeneous mixture, with a Li + ion transference number of 0.56, is found at a 1:1.5 mole ratio of PDADMA FSI:LiFSI, whereas crystalline phases are observed at higher LiFSI contents. Molecular dynamics (MD) simulations indicate a co-coordination of the FSI anion with both the Li + and the polymer backbone, and this co-coordination is maximized at 1:1.5 mole ratio, which facilitates Li + transport. The optimized electrolyte has been demonstrated to support long-term stable Li-metal symmetrical cycling as well as Li-metal battery cycling (Li | LiFePO 4 and Li | Li 1/3Ni 1/3Mn 1/3CoO 2) at elevated temperature, with areal capacity higher than 1.1 mAh cm −2.

9 thoughts on “Better Solid State Lithium Ion Batteries”

  1. ALL energy products get replaced over time as cheaper, better sources become available. Whale oil anyone? Kerosene for your lamp sir? And coal is not dead by a long shot. Going down in the U.S., yes, but not in the grave globally or otherwise. Soon is a relative term, but if you mean in the next 25 years or sooner, I’d take that bet any day.

  2. I don’t agree with Lol, but you put quote marks around fake news as though he said that; he didn’t. In truth, none of these batteries has emerged that have been spoken about on this site. It doesn’t mean aspects of them haven’t been, but Lol said nothing about battery technology advancement. You are creating an argument for yourself out of thin air.

  3. Coal is the fastest growing power source and hasn’t even hit an inflection point in it’s growth yet. We’ll hit peak solar before we hit peak coal. Maybe then we can stop being stupid and build nuclear.

  4. And one day later NBF posts an article showing how those “plain ol’ Lithium Ion” have been exponentially falling in price as these new technologies are incorporated into them.

  5. And battery technology has advanced, and it will continue advancing. Do you deny these facts? The technical specs certainly speak for themselves. They’re certainly not ‘fake news’.

  6. I wouldn’t be surprised if the “plain ol’ Lithium Ion” of today isn’t quite the same beast as the “plain ol’ Lithium Ion” of 10 years ago. Lithium Ion is an umbrella term, and my impression is that Lithium Polymer (which is also an umbrella term) has been getting more common.

  7. Just about every month NBF spits out one of these articles about some drastic improvement in battery tech. This has been going on for several years now yet we are still to see a single product hit the market. All we have is plain ol’ Lithium Ion.

  8. You can offset an unlimited amount of GHGs at $100 per tonne CO2 equiv. That’s like 90 cents a gallon.*
    Coal on the other hand is a literal burning of carbon molecules for energy. So $100 per tonne triples the cost of coal and utterly sends it to the grave.
    So in conclusion, oil sticks around with a lot of offsets purchased for it.
    *Tree planting is like $30 per tonne -but that doesn’t scale infinitely.

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