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NEC Develops Batteries With 30% Greater Charge Densities

By - Source: JCN | B 16 comments

NEC says it may have found a way to provide much higher density in lithium-ion batteries, which could, for example, substantially increase the range of electric cars.

According to the company, it has developed a prototype of a manganese lithium-ion battery that use cathodes to support higher voltages as well as a fluorinated electrolyte solution that is much more resistant to oxidation than the common carbonate-based solvents. It also acts as a stabilizer for those higher voltage operations.

NEC said that it was able to increase the operating voltage from 3.8 V to 4.5 V and achieved a 30 percent greater charge capacity at any given weight of the battery as a result. The prototype charge density was 200 Wh/kg, which is up from 150 Wh/kg in current batteries.

There is still some research required before such batteries could see commercial production. NEC noted that the technology only maintains about 80 percent of original capacity with 500 full charge and discharge cycles in conditions below room temperature (68 degrees F), while maintaining roughly 60% when above room temperature (113 degrees F).

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  • 6 Hide
    archange , October 11, 2012 7:34 AM
    Quote:
    According to the company, it has developed a prototype of a manganese lithium-ion battery that use cathodes to support higher voltages as well as a fluorinated electrolyte solution that is much more resistant to oxidation than the common carbonate-based solvents.


    Not to nitpick, I'm cheering for more battery life as much as the next guy, but isn't that more toxic as well?
  • 3 Hide
    srhelicity , October 11, 2012 7:50 AM
    Quote:
    while maintaining roughly 60% when above room temperature (113 degrees F).


    If 113 F is room temperature, I don't want to be in that room!
  • 0 Hide
    danwat1234 , October 11, 2012 7:53 AM
    retains 60% capacity? More research needed indeed. Reminds me of Envia and how they are making lithium batteries with more energy density, but of course the increased capacity doesn't hold after it's used x many cycles.
    Nanowire lithium ion FTW?
  • 2 Hide
    danwat1234 , October 11, 2012 7:54 AM
    srhelicityIf 113 F is room temperature, I don't want to be in that room!


    Err, the battery would easily be up there if it's used with spirited driving in an electric/hybrid car, or in your pocket inside a smart phone, or in a laptop, pad..
  • 2 Hide
    ikyung , October 11, 2012 8:22 AM
    Forget the cars. Put one in my pocket.
  • 0 Hide
    memadmax , October 11, 2012 8:35 AM
    This thing is either a dud or something is wrong with it.

    "NEC noted that the technology only maintains about 80 percent of original capacity with 500 full charge and discharge cycles in conditions below room temperature (68 degrees F), while maintaining roughly 60% when above room temperature (113 degrees F)"

    At this point, it isn't even ready to be a flashlight battery....
  • 1 Hide
    joytech22 , October 11, 2012 9:09 AM
    What if my room temperature is 0.1C?

    Joking, but still.. Y U NO IMPLEMENT INTO PHONE BATTERIES.
  • 4 Hide
    jeffunit , October 11, 2012 12:20 PM
    "According to the company, it has developed a prototype of a manganese lithium-ion battery that use cathodes..."

    How many cathodes does it have?
    All batteries have a cathode and an anode.
    Saying a battery uses cathodes is like saying that your power plug has neutrals and hots connectors.
  • 0 Hide
    john_4 , October 11, 2012 1:59 PM
    Good news trickle that tech to phone and laptop batteries too.
  • 0 Hide
    coolcash1777 , October 11, 2012 2:01 PM
    jeffunit"According to the company, it has developed a prototype of a manganese lithium-ion battery that use cathodes..."How many cathodes does it have?All batteries have a cathode and an anode.Saying a battery uses cathodes is like saying that your power plug has neutrals and hots connectors.


    Batteries have many "cells" each of which has a anode and cathode (with electrolyte in the middle). The cells are stacked to produce the voltage and amperage required for the "battery."
  • 0 Hide
    jeffunit , October 11, 2012 2:58 PM
    coolcash1777Batteries have many "cells" each of which has a anode and cathode (with electrolyte in the middle). The cells are stacked to produce the voltage and amperage required for the "battery."


    So how is it newsworthy that this battery uses cathodes?

    Don't all batteries (with multiple cells) use cathodes?

    How is it different than saying this battery has terminals or this battery produces voltage or this battery has anodes?
  • 0 Hide
    wiyosaya , October 11, 2012 4:48 PM
    jeffunitSo how is it newsworthy that this battery uses cathodes?Don't all batteries (with multiple cells) use cathodes?How is it different than saying this battery has terminals or this battery produces voltage or this battery has anodes?

    A battery is a collection of cells, and each cell has both an anode and a cathode. I was thinking that the fact that the battery uses cathodes is also not newsworthy since all batteries from the dawn of batteries and electrochemical cells use cathodes. The only thing that I can think is that Wolfgang left out a descriptive word. Either that, or his technomuse has the day off. :sol: 
  • 0 Hide
    f-14 , October 11, 2012 7:17 PM
    80% for dealing with snow? i can deal with that. 68% for desert climate? meehh i don't really travel to the mohavi anyways.
  • 1 Hide
    razor512 , October 11, 2012 8:54 PM
    Instead of li-ion they need to work on super capacitors which are better suited for electric cars.

    Li-ion batteries have a very low charge cycle. In an all electric car the range is already a major issue, imagine losing 40% of that range after 2-3 years, and having to consider replacing the battery after 5 years or so (the most expensive part of the car)

    super capacitors have been tested at 500,000+ charge/ discharge cycles with 0% loss in capacity, they just have a lower energy density than even led acid batteries (making it unfeasible to even use in a truck) but if they put more work on it they may be able to someday get that energy density levels close to that of li-ion batteries.

    PS li-ion batteries in cars rarely go below room temperature. cars (eg the ford ones and the tesla ones, rely on active cooling to keep the battery from getting to a unsafe temperature. (if you have no plans to test drive a car, i recommend you test drive some of the electric cars (some car dealerships even give $5 giftcards for test driving a car and listening to a sales pitch) but anyway, test drive a electric car then ask to check the trunk and back seats (you will feel that those areas have gotten pretty warm, that is because li-ion batteries heat up while they are charging and also while they are discharging, and aggressive driving (eg harder acceleration, will heat the battery up very quickly)

    In one way it is good for cold areas because you are less likely to be stuck with the cold temperature capacity issue, it also means a shorter lifespan for the car.

    Remember, other than using different materials, you cant extend the life of a li-ion battery by much since it is a chemical reaction and chemistry shows that reactions have a limit which can be calculated. (and those calculations are basically the max you can ever hit)

  • 0 Hide
    martel80 , October 12, 2012 5:59 AM
    Wake me up when it's 300% increase. Nonexistent battery life is the only reason why I haven't bought a smartphone yet.
  • 0 Hide
    abbadon_34 , October 14, 2012 5:53 AM
    some comparison data would be nice