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Thread: Electric cars? Not as good as we think.

  1. #101  
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    Quote Originally Posted by billvon View Post
    Might be at $10 a gallon - but with a car that uses only 50 gallons of gas a year, that's not a big hardship.
    Your comment resonates with me because the cost of gas ALREADY is about 10 bucks a gallon-- a major obstacle to other energy sources is most of the cost of fossil fuels is masked by other things, such as the cost of huge militaries to protect its extraction, shipment, and production and of course back end environmental impacts.
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  2. #102  
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    Engineering and colleagues have now developed a hybrid zinc battery that combines the best of zinc-air and zinc-nickel technologies, completing over 5,000 charging cycles with no loss of performance. The battery has a zinc anode, while its cathode is based on a carbon-coated nickel foam covered with nickel cobalt oxide nanowires. The liquid electrolyte between the electrodes contains hydroxide anions dissolved in water.
    A key reason for the battery's excellent performance is that the cathode works in two distinct ways during charging and discharging. When the battery charges, hydroxide ions from the electrolyte react with metal oxides in the cathode to produce oxyhydroxide compounds, freeing electrons. But the metals in the cathode also act as a catalyst, combining hydroxide anions to produce oxygen, water, and more electrons. These electrons flow around the circuit to the anode, where they combine with zinc ions in the electrolyte to produce zinc metal. During discharge, these electrochemical processes are reversed.
    The battery has a stable two-step discharge voltage between 1.75 and 1.0 volts, and maintained its performance over three months of continuous testing, vastly outstripping previous zinc batteries. Zong estimates that the battery can store about 270 Watt-hours per kilogram, with potential for improvement. "This is already on a par with lithium-ion batteries available on the market," he says.
    Read more at: https://phys.org/news/2017-07-low-co...ained.html#jCp
    Last edited by Stanley514; December 10th, 2017 at 07:47 PM.
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  3. #103  
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    Ooh don't think middle class can afford it.
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  4. #104  
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    Electric Cars are very good to use.
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  5. #105  
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    Quote Originally Posted by hardeepsingh View Post
    Electric Cars are very good to use.
    Depends where you live. If you're in the Pacific Northwest (US) you can make a good argument. If you in the Appalachians, where most grid power still comes from fossil fuel, not so much.
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  6. #106  
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    Quote Originally Posted by Lynx_Fox View Post
    Quote Originally Posted by hardeepsingh View Post
    Electric Cars are very good to use.
    Depends where you live. If you're in the Pacific Northwest (US) you can make a good argument. If you in the Appalachians, where most grid power still comes from fossil fuel, not so much.
    One of the nice things about EV's is that they can store charge. So if you start building out solar or wind they can charge when the power is available, and throttle back or stop when power is scarce. Thus even in areas where power comes from coal, they can take advantage of (indeed enable) renewable energy there.
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  7. #107  
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    How much tear and wear of automotive parts reduces in plug-in hybrid comparatively to non-hybrid? If plug-in hybrids spends 80-95% of all time in electric mode? I suggest oil changes are less frequent, mechanic emergency brakes are rarely used, then exhaust system, fuel system, cooling system, transaxle etc. All this have to preserve much better. But what about reality? And especially when free piston generator will be adopted in the future. How it will change then?
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