• Feb 17th 2011 at 9:00AM
  • 8
Discharge curves of Li-O2/CO2 batteries with varying ratios of CO2

Back in December of 2010, Toyota unveiled a prototype four-layer solid-state battery. The Japanese automaker touted the solid-state battery design for its longevity and ability to withstand extreme temperatures. Toyota engineers continue to focus on battery technology.

This time around, engineers at the automaker's Advanced Battery Lab have developed a gas-based lithium battery that utilizes a mixture of O2 and CO2 (Li/O2-CO2) and is claimed to have a discharge capacity that's nearly three times that of a standard lithium–air (Li/O2) battery.

Green Car Congress points out that Toyota's researchers have concluded that the Li/O2-CO2 battery is non-rechargeable due to the difficulty of electrochemical decomposition of Li2/CO3 in the cathode, but claim that the battery's exceptional discharge capacity offers the potential to either replace a vehicle's primary battery or provide an additional energy source.

The graphical illustration (above) shows the discharge curves of the Li/O2-CO2 batteries with various ratios of CO2 mixed in. A paper detailing Toyota's work with Li/O2-CO2 battery technology was published in the Royal Society of Chemistry journal, Chemical Communications, which can be viewed, for a fee, by clicking here.

[Source: Green Car Congress]

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    • 1 Second Ago
      • 4 Years Ago
      Or use it like Nitro for extra boost in acceleration.
      • 4 Years Ago
      This is a replacement for the lithium button cells you use, not a replacement for a car pack. It's non rechargeable.
        • 4 Years Ago
        But they made it seem like it was for EV's (then and now). Batteries for key fobs have little to do with EV's. Yes of course most if not all cars have them. But they made it seem like a HUGE breakthrough on car batteries and....
        no wait its key fob batteries... w???

        Granted, not having to replace key fob batteries as often is good too.
      • 4 Years Ago
      Did they say "not rechargeable"??????
        • 4 Years Ago
        You just need to buy a new battery from them once a week.
      • 4 Years Ago
      That's great for hearing aids, now how about some car batteries? :)

      Anyway, kinda interesting to see co2 being used to extend battery life. Something ironic about that.
        • 4 Years Ago
        Ah, then an EV would be as wasteful as a gas car by being partially disposable. Maybe people will buy them then, as it won't seem like EVs are for hippies?

        Anyhow i didn't know you were still around; how are things with the cars.. get your leaf yet?
        • 4 Years Ago
        The point is you could series and parallel wire 50,000 of these Toyota batteries together and power a EV 200 miles and recycle them when your done. (Batteries and BMS not included)

        Time to start saving C02 for Toyota to make batteries out of.

        I hear Dick Wier the CEO of EESTORE is going to come out with a "electric energy storage device" that will be the size of a shoe box and power a hearing aid. Maybe ZENN should buy some more stock in Estore? Since the CEO of ZENN has just stepped down he no longer has to be part of this artful duping by Eestore. What about Lockeed Martin Corp? How stupid are they to buy into Eestore? Never mind, funding most likley comes from the federal government via Lockeed anywho.

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