Thread for new battery breakthrough PR releases

"An ultrafast rechargeable aluminium-ion battery"
http://www.nature.com/nature/journal/v520/n7547/full/nature14340.html
Includes
The cell exhibits well-defined discharge voltage plateaus near 2 volts, a specific capacity of about 70 mA h g–1 and a Coulombic efficiency of approximately 98 per cent. The cathode was found to enable fast anion diffusion and intercalation, affording charging times of around one minute with a current density of ~4,000 mA g–1 (equivalent to ~3,000 W kg–1), and to withstand more than 7,500 cycles without capacity decay.
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a rechargeable aluminium battery with high-rate capability that uses an aluminium metal anode and a three-dimensional graphitic-foam cathode. The battery operates through the electrochemical deposition and dissolution of aluminium at the anode, and intercalation/de-intercalation of chloroaluminate anions in the graphite, using a non-flammable ionic liquid electrolyte.
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Mushroom based Li-Ion batteries: http://www.nature.com/articles/srep14575

Here we explore the electrochemical performance of pyrolyzed skins from the species A. bisporus, also known as the Portobello mushroom, as free-standing, binder-free, and current collector-free Li-ion battery anodes. At temperatures above 900 °C, the biomass-derived carbon nanoribbon-like architectures undergo unique processes to become hierarchically porous. During heat-treatment, the oxygen and heteroatom-rich organics and potassium compounds naturally present in the mushroom skins play a mutual role in creating inner void spaces throughout the resulting carbon nanoribbons, which is a process analogous to KOH-activation of carbon materials seen in literature. The pores formed in the pyrolytic carbon nanoribbons range in size from sub-nanometer to tens of nanometers, making the nanoribbons micro, meso, and macroporous. Detailed studies were conducted on the carbon nanoribbons using SEM and TEM to study morphology, as well as XRD and EDS to study composition. The self-supporting nanoribbon anodes demonstrate significant capacity increase as they undergo additional charge/discharge cycles. After a pyrolysis temperature of 1100 °C, the pristine anodes achieve over 260 mAh/g after 700 cycles and a Coulombic efficiency of 101.1%, without the use of harmful solvents or chemical activation agents.
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Scientists in Canada and France have created a micro-supercapacitor with the same energy density of a modern lithium-ion battery that could potentially last forever.
http://www.engadget.com/2015/10/01/micro-supercapacitor-battery/#continued
 
TheBeastie said:
Scientists in Canada and France have created a micro-supercapacitor with the same energy density of a modern lithium-ion battery that could potentially last forever.
http://www.engadget.com/2015/10/01/micro-supercapacitor-battery/#continued
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Made of Gold? Not going to be cheap to have a 5kg pack on your bike.
 
ES "Search found 1385 matches: +hydrogen"... and here's another one:
"French unveil 'world first' hydrogen-powered electric bike emitting only pure water"
http://www.telegraph.co.uk/news/wor...d-electric-bike-emitting-only-pure-water.html

Press release from Pragma Industries re their ALTER bike:
http://www.pragma-industries.com/about-us/press-releases/alter-bike/

Batterie-main.jpg
 
Kind of flys in the face of what we think about lithium cells but here it is...

Researchers from California Institute of Technology find that heat can break down the damaging branch-like structures that grow inside batteries, which may possibly be used to extend battery lifetimes
http://www.eurekalert.org/pub_releases/2015-10/aiop-eab093015.php
 
http://www.marketwatch.com/story/electrovaya-litarion-introduce-40ah-lithium-ion-cell-with-breakthrough-technology-driving-the-cost-and-safety-barriers-2015-10-14-2173021



9,000 cycles at 1c to 100% dod sounds like the perfect battery for a moped. 1p no bms just run in series till desired voltage is reached. A forty ah format would probably have threaded terminals too :D
 
Change the graphite to silicon in lithium batteries.Smaller,longer-lasting,more energy. They hope to be on the market next year.

http://www.treehugger.com/clean-technology/smaller-longer-lasting-and-cheaper-batteries-could-store-twice-energy.html


“Graphite has long been used to build the negative electrodes in lithium-ion batteries,” said Professor Chen, the Canada Research Chair in Advanced Materials for Clean Energy and a member of the Waterloo Institute for Nanotechnology and the Waterloo Institute for Sustainable Energy. “But as batteries improve, graphite is slowly becoming a performance bottleneck because of the limited amount of energy that it can store.”

Using graphite, the maximum theoretical capacity of the battery is 370 mAh/g (milliamp hours per gram), but silicon has a theoretical capacity of 4,200 mAh/g. Silicon also has the added benefit of being much cheaper.

So, why hasn't silicon been used already? The problem with silicon is that it interacts with the lithium inside the cell during the charge cycle and expands and contracts as much as 300 percent. That expansion causes cracks and ultimately causes the battery to fail.

The research team figured out a way to minimize the expansion by using a flash heat treatment for the silicon electrodes that creates a "robust nanostructure." This structure resulted in less contact between the electrode and the lithium which cut out most of the expansion and contraction and made the battery much more stable.

The new design had a capacity of than 1,000 mAh/g over 2,275 cycles and the researchers say that the design promises a 40 to 60 percent increase in energy density over traditional lithium-ion batteries. That means that an electric car with this new battery design could have a range of over 300 miles, while the batteries themselves would be lighter, reducing the overall weight of the vehicle.

The team is working on commercializing the new design and hope that it will be in new batteries in the next year.
 
What is the lastest and greatest in bike batteries today
And does anyone have a connection that will ship it from chinA
I thought Lipo were good
 
Yespat2@aol.com said:
What is the lastest and greatest in bike batteries today
And does anyone have a connection that will ship it from chinA
I thought Lipo were good
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In practice, commercially available, affordable, proven technology, ..is the newer high energy 18650 NCA lithium chemistry cells, Panasonic, Samsung, LG , etc.
Still waiting for the big breakthrough in energy density/ cost/ cycle life. ,
 
After about 600 cycles @1.5C of my Lifepo4 battery there is ~70% left capacity.
Now i looked alternatives and im quite suprised:
Panasonic NCR 2900 mah cell costs 2.65€ incl shipping.
Its 2x cheaper, 2x lighter and takes 2x less space than Lifepo4.
So goodbye Lifepo4 for me.
Welcome to the future :eek:
 
Is anyone making bike batteries with these cells yet
If so where can I find them ?
Does any have any connections in China that will ship Batteries to the USA
 
DVDRW said:
After about 600 cycles @1.5C of my Lifepo4 battery there is ~70% left capacity.
Now i looked alternatives and im quite suprised:
Panasonic NCR 2900 mah cell costs 2.65€ incl shipping.
Its 2x cheaper, 2x lighter and takes 2x less space than Lifepo4.
So goodbye Lifepo4 for me.
Welcome to the future :eek:
Click to expand...

Just don't expect the Panasonic NCR 2900 to last longer then your LifePO4's.........
Panasonic says they will loose about 1/3 their capacity after 500 cycles.
http://industrial.panasonic.com/lecs/www-data/pdf2/ACA4000/ACA4000CE240.pdf
Panisonic NCR 2900 Cycle Graph.JPG
 
Quote from Tesla CIO:
We use a nickel-cobalt-aluminum (LiNiCoAlO2) lithium-ion chemistry for our battery cathode material.
These cells were designed for a 12-20 year life and should be good for ~1200-2000+ cycles :roll:

Planning to use 60% DOD @ 0,7C
 
DVDRW said:
After about 600 cycles @1.5C of my Lifepo4 battery there is ~70% left capacity.
Now i looked alternatives and im quite suprised:
Panasonic NCR 2900 mah cell costs 2.65€ incl shipping.
Its 2x cheaper, 2x lighter and takes 2x less space than Lifepo4.
So goodbye Lifepo4 for me.
Welcome to the future :eek:
Click to expand...
Those cells you linked to list an "optimal discharge" of 3.3A. That's 0.33C, which is pretty low. Max is only 30A from a 10Ah cell, also pretty low. You may have worn them out more quickly by using them that way.
 
New design points a path to the 'ultimate' battery

http://www.sciencedaily.com/releases/2015/10/151029152629.htm

Snip.....
Scientists have developed a working laboratory demonstrator of a lithium-oxygen battery which has very high energy density, is more than 90% efficient, and, to date, can be recharged more than 2000 times, showing how several of the problems holding back the development of these devices could be solved.......
....By precisely engineering the structure of the electrode, changing it to a highly porous form of graphene, adding lithium iodide, and changing the chemical makeup of the electrolyte, the researchers were able to reduce the 'voltage gap' between charge and discharge to 0.2 volts. A small voltage gap equals a more efficient battery -- previous versions of a lithium-air battery have only managed to get the gap down to 0.5 -- 1.0 volts, whereas 0.2 volts is closer to that of a Li-ion battery, and equates to an energy efficiency of 93%.

The highly porous graphene electrode also greatly increases the capacity of the demonstrator, although only at certain rates of charge and discharge. Other issues that still have to be addressed include finding a way to protect the metal electrode so that it doesn't form spindly lithium metal fibres known as dendrites, which can cause batteries to explode if they grow too much and short-circuit the battery.
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.........snip
 
LockH said:
e-beach said:
New design points a path to the 'ultimate' battery
http://www.sciencedaily.com/releases/2015/10/151029152629.htm
Snip... Scientists have developed a working laboratory demonstrator of a lithium-oxygen battery
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More on this Cambridge U. development:
http://www.cnbc.com/2015/10/30/hemists-make-super-battery-breakthrough.html

"... they say at least another decade of work is likely to be required..." :evil:
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Yeah I was a bit bummed out when I read that bit, I want it now! But its good for them to be honest, and I guess it adds weight to their claimed specs as well, and who knows if so many eyes on the same stuff maybe they will get there faster.
 
e-beach said:
DVDRW said:
After about 600 cycles @1.5C of my Lifepo4 battery there is ~70% left capacity.
Now i looked alternatives and im quite suprised:
Panasonic NCR 2900 mah cell costs 2.65€ incl shipping.
Its 2x cheaper, 2x lighter and takes 2x less space than Lifepo4.
So goodbye Lifepo4 for me.
Welcome to the future :eek:
Click to expand...

Just don't expect the Panasonic NCR 2900 to last longer then your LifePO4's.........
Click to expand...

That graph is worst case, constant fast charging (for those cells) and then 100% DOD cycles. If you reduce peak voltage to 4.1 and only discharge to 3.5v you're only giving up perhaps 15-20% of the energy but should see many, many more cycles. After 270 cycles on my LG HE4 pack I have lost a little under 3% of original capacity by following those guidelines. Given that these cells are half the weight/size of lifepo4 you can afford to oversize the pack slightly to give them a much easier life. I expect I will get easily 1000+ cycles before I see 10% loss by which stage I will WANT to replace them as cells will have advanced considerably.
 
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