This is clett's Typepad Profile.
Join Typepad and start following clett's activity
Join Now!
Already a member? Sign In
Recent Activity
Wonderful numbers, but I'm with Davemart on this one - we can't take another EESTOR or ENVIA!
At the end of the day, the consumer will decide which of these two technologies wins out for renewable transport. I guess that will be based primarily on fuel cost per mile and capital cost. Pleased to see progress being made in large scale storage of excess renewable electricity (power to gas), though, which is the final component of the energiewende. In my view it should be methanated for storage in the natural gas network, then it's backwards compatible with all the existing infrastructure.
So road-going diesel engines are now at 44% efficiency. Toyota recently announced the gasoline engine in the next Prius manages 40% efficiency. Not far off the much touted 50% efficiency of PEM fuel cells. Anyone still fancy a Mirai?
I think LG chem also makes the batteries for the Volt, so 16 kWh times as many of those are produced each yer.
Agreed, if this solves the remaining problems of Li-S, let alone Li-Air, then this is the biggest news GCC has reported over the last year. If it is eventually commercialised, doubtless the first commercial format will be 18650, which means we can expect Tesla to be first to test it for EV use.
Let's remember that in order to get down to the magic $100 per kWh at the cell level, a single 18650 cell, of the type used to make up the Tesla packs (i.e. 46 g, 12 Wh each), needs only to come down in cost to $1.20 per cell. Industry insiders suggest that Tesla is buying them currently at $1.90 per cell, so $100 per kWh at the cell level is not too far away. At the pack level, Telsa are making big progress cutting the additional cost / weight of the non-cell pack components too.
I agree with ECI, $100 per kWh is where we're headed in the next 3-4 years, driven mainly by Mr Musk's big workshop. After that, costs will fall more slowly, but progress in battery size and mass (at the pack level) will continue with good pace.
This, combined with the plummeting cost per kWh of wind and PV electricity, is another nail in the coffin for coal. Isentropic storage is even cheaper.
"The gas tank cost is negligible and does not wear out." But the engine and gearbox do, with big bills common later in the ICE life, not to mention their servicing costs over the years. These should be factored into any comparison of ICE/EV running costs.
Just read their press release: It seems the LiS cells they are using are already at 350 Wh/kg, and they are concurrently investigating lithium-air. Goodbye gasoline!
"a 10 kWh Li-sulfur battery" Wow, that is BIG news. Is this the first time we've heard of a major manufacturer putting a LiS battery into a vehicle, or even declaring a LiS research programme? Ironic that they should pair it with a fuel cell!
Two thoughts spring to mind.... first, Toyota may be thinking they won't be able to build a H2-refuelling network all by themselves, so would like to remove as many obstacles as possible to other manufacturers to produce H2-fuelled vehicles. Second, perhaps the value of fuel cell patents is now so low, given the beating H2 technology has taken (and will continue to take) from lithium ion and its successors, that they can at least gain some benefit from their expensive programme by being able to say "At least we tried" and take some credit / positive press for that.
Wasn't the EESTOR story all about hybrid lithium ion capacitors? Anyone heard what their recent news is?
Ironically, the toughest competition for the Mirai (at least in terms of taking real customer dollars) will come from - Toyota's own Prius. Half the price, twice the range, cheaper to run, much, much easier to find fuel.
This could be great for Lithium-Sulphur, and a quick jump to 500 Wh/kg, if the chemistry is compatible.
In other news, Toyota has said that fuel cell cars will be more expensive to refuel than gasoline cars for the forseeable future: They estimate $50 for a full tank of H2 and 300 miles range. Compare this with a Prius, which is cheaper, can refuel at any gas station, has a range of 595 miles, and the gasoline would cost $18 to go 300 miles. With competition like that, the FCV could be a difficult sell, even in Japan.
LiS has promised to blow LiIon into the weeds, specific energy-wise at least, for years. The only things holding it back from taking the front seat are cycle life and safety. As soon as somebody cracks those, LiIon will go the way of NiCd and we will have 500 mile range EVs. Two things that may be interesting to bear in mind for the time being: first, SION's 350 Wh/kg LiS batteries have already proved their worth by keeping aloft a solar-powered plane for 10 nights in a row. Second, the first battery format LiS chemistry will be manufactured in volume is 18650, which means Tesla will be able to slot it directly into their packs and test/implement it immediately. Meanwhile the other auto manufacturers will have to wait years for somebody to agree to retool their pouch-style cell production machinery for LiS.
Perhaps we're wasting our breath debating this - in the end the consumer will decide. To my mind, if the choice is between BEV (charge anywhere including at home, 3 cents per mile fuel costs, very low maintenance costs) and FCEV (refill only at rare and expensive filling stations, 10 cents per mile fuel costs assuming $5 per kg at the pump, high stack maintenance costs), then the retailers are going to have to work very hard to convince people to hand over their cash for the FCEV.
"fuel cells are much more efficient than internal combustion engines (ICEs)" Peak fuel cell efficiency (~50-60%) is not that different from peak diesel engine efficiency these days (45-50%).
"I guess they have their reasons, and cost may be one of them." +1, simple = cheaper, which may have been their main design priority if they want to move this into the mainstream high volume market.
But no Miller or Atkinson cycle as most of us were expecting?
I think the motor used in the Tesla S is also a combined motor/inverter unit, for the same reasons cited above?
The Mitsubishi EVO FQ400 (2009 model) gave 400 hp from a 2 litre engine and came with a 3 year 36k mile warranty, only problem was the horrible lag.
There are so many approaches right now to solve the LiS issues. Maybe somewhere out there, the right anode, the right cathode and the right electrolyte have already been found and we just need to put the right set together....?