4 ms·

I agree. Where weight and size do not matter, more choices for batteries are possible. E.g. redox flow batteries. https://spectrum.ieee.org/green-tech/fuel-c

by gepi79 8y ago

I agree. Where weight and size do not matter, more choices for batteries are possible. E.g. redox flow batteries. https://spectrum.ieee.org/green-tech/fuel-cells/its-big-and-longlived-and-it-wont-catch-fire-the-vanadium-redoxflow-battery https://spectrum.ieee.org/green-tech/fuel-cells/its-big-and-... In the near future, atmospheric CO2 will be recycled to create organic fuel. http://newscenter.lbl.gov/2017/09/18/solar-fuel-system-recycles-co2-for-ethanol-ethylene/ http://newscenter.lbl.gov/2017/09/18/solar-fuel-system-recyc... https://www.purdue.edu/newsroom/releases/2017/Q2/instantly-rechargeable-battery-could-change-the-future-of-electric-and-hybrid-automobiles.html https://www.purdue.edu/newsroom/releases/2017/Q2/instantly-r... Solid state batteries are also interesting. Lithium-ion batteries will be replaced because they can develop dendrites and catch fire. https://cleantechnica.com/2018/06/26/the-solid-state-lithium-ion-battery-has-john-goodenough-finally-done-it/ https://cleantechnica.com/2018/06/26/the-solid-state-lithium... https://www.researchgate.net/publication/324734826_Non-Traditional_Safe_High-Voltage_Rechargeable_Cells_of_Long_Cycle_Life https://www.researchgate.net/publication/324734826_Non-Tradi... https://hardware.slashdot.org/story/17/04/19/016213/the-slashdot-interview-with-lithium-ion-battery-inventor-john-b-goodenough https://hardware.slashdot.org/story/17/04/19/016213/the-slas...

semi-extrinsic 8y ago
> In the near future, atmospheric CO2 will be recycled to create organic fuel. If you have unlimited free energy in this near future, then maybe you can do what yoj say (or maybe electrolysis to produce hydrogen is better/more profitable). Otherwise no, this won't happen.
- ben_w 8y ago
  PV is growing at 30-40% per year for many years now. This year’s end-of-year forecast is 0.5 TW, extrapolating that trend gives 11.5-28.3 TW in December 2030.
- gepi79 8y ago
  IMO liquid or solid fuel at normal pressure and temperature is much cheaper and easier and safer to store than hydrogen. Besides: http://carbonengineering.com http://carbonengineering.com http://www.climeworks.com http://www.climeworks.com From https://lustysociety.org/ethics.html#climate https://lustysociety.org/ethics.html#climate: Annual global fossil fuel subsidies amounting to $5.3 trillion in 2015 (6.5% of global GDP). https://www.sciencedirect.com/science/article/pii/S0305750X16304867 https://www.sciencedirect.com/science/article/pii/S0305750X1... According to the Global Carbon Atlas: 36 183 million metric tons of CO2 emissions in 2016. According to estimates in 2018 by Carbon Engineering and Climeworks: The cost of capturing 1 metric ton CO2 from the air costs $ 600 in 2018 and could fall under $ 100 in 5 - 10 years. A plant could make a liter fuel for a dollar. At a cost of $ 600 per metric ton of CO2, the capture of the emissions of 2016 (36 183 million metric tons) costs $ 21 710 billion or $ 21.7 trillion. At a cost of $ 100 per metric ton of CO2, the capture of the emissions of 2016 (36 183 million metric tons) costs $ 3 618 billion or $ 3.6 trillion. The organic fuel should be used with batteries and fuel cells and not with combustion engines. In order to decrease the CO2 concentration in the environment, the waste products must be contained and recycled later without release into the atmosphere.
- rbanffy 8y ago
  Hydrogen may be more energetic than a lot of stuff per unit of mass, but we shouldn't forget the tanks we need to carry it around are anything but light.
jp555 8y ago
“In the near future, atmospheric CO2 will be recycled to create organic fuel” That’s been around for quite a while already; you’re describing a tree.
- smilekzs 8y ago
  --- at a rate orders of magnitude faster than trees currently do
  - jp555 8y ago
    Ah, you mean grass?
- syngrog66 8y ago
  yes but... 3D printed by a neural net at Trees.com ON A BLOCKCHAIN and crowdsourced with a Kickstarter from curated ambi-sexual SanFran hipsters, avail in 5 colors for pre-order at a low low annual subscription add-on for Prime members of $79.99
  - deedree 8y ago
    I shouldn't feed the troll. But since you made me chuckle, did you mistake hckrnews for reddit maybe? :P

by gepi79 8y ago

semi-extrinsic 8y ago

> In the near future, atmospheric CO2 will be recycled to create organic fuel. If you have unlimited free energy in this near future, then maybe you can do what yoj say (or maybe electrolysis to produce hydrogen is better/more profitable). Otherwise no, this won't happen.

ben_w 8y ago
PV is growing at 30-40% per year for many years now. This year’s end-of-year forecast is 0.5 TW, extrapolating that trend gives 11.5-28.3 TW in December 2030.
gepi79 8y ago
IMO liquid or solid fuel at normal pressure and temperature is much cheaper and easier and safer to store than hydrogen. Besides: http://carbonengineering.com http://carbonengineering.com http://www.climeworks.com http://www.climeworks.com From https://lustysociety.org/ethics.html#climate https://lustysociety.org/ethics.html#climate: Annual global fossil fuel subsidies amounting to $5.3 trillion in 2015 (6.5% of global GDP). https://www.sciencedirect.com/science/article/pii/S0305750X16304867 https://www.sciencedirect.com/science/article/pii/S0305750X1... According to the Global Carbon Atlas: 36 183 million metric tons of CO2 emissions in 2016. According to estimates in 2018 by Carbon Engineering and Climeworks: The cost of capturing 1 metric ton CO2 from the air costs $ 600 in 2018 and could fall under $ 100 in 5 - 10 years. A plant could make a liter fuel for a dollar. At a cost of $ 600 per metric ton of CO2, the capture of the emissions of 2016 (36 183 million metric tons) costs $ 21 710 billion or $ 21.7 trillion. At a cost of $ 100 per metric ton of CO2, the capture of the emissions of 2016 (36 183 million metric tons) costs $ 3 618 billion or $ 3.6 trillion. The organic fuel should be used with batteries and fuel cells and not with combustion engines. In order to decrease the CO2 concentration in the environment, the waste products must be contained and recycled later without release into the atmosphere.
rbanffy 8y ago
Hydrogen may be more energetic than a lot of stuff per unit of mass, but we shouldn't forget the tanks we need to carry it around are anything but light.

jp555 8y ago

“In the near future, atmospheric CO2 will be recycled to create organic fuel” That’s been around for quite a while already; you’re describing a tree.

smilekzs 8y ago
--- at a rate orders of magnitude faster than trees currently do
- jp555 8y ago
  Ah, you mean grass?
syngrog66 8y ago
yes but... 3D printed by a neural net at Trees.com ON A BLOCKCHAIN and crowdsourced with a Kickstarter from curated ambi-sexual SanFran hipsters, avail in 5 colors for pre-order at a low low annual subscription add-on for Prime members of $79.99
- deedree 8y ago
  I shouldn't feed the troll. But since you made me chuckle, did you mistake hckrnews for reddit maybe? :P