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Aleees claims new double-layer nano-carbon coating technology enhances battery cycle life 2.7 times

In a presentation at the 220th Electrochemical Society (ECS) meeting held in Boston, Taiwan-based Advanced Lithium Electrochemistry Co., Ltd. (Aleees) (earlier post) said that its new double-layer nano-carbon coating technology allows olivine material to be coated with different carbon compounds with thicknesses less than 5 nm so as to improve the structural integrity of the material and enhance the life cycle of batteries by 2.7 times.

Aleees’ experiments have shown that application of such a technology can increase the life cycle of batteries, around 2,000 recharges at present, to more than 5,400 recharges but still retain 80% of the battery cell’s capacity.

Alees earlier developed a new iron phosphate (LFP) material for use in a lithium-ion battery cathode. The LFP-NCO (Nano-Co-crystalline Olivine) LiFePO4·zMO' (M'O = metal oxide) material is designed to address the low conductivity problem of traditional iron phosphate materials, reduce impurities in LiFePO4, maintain the material consistency and offer an attractive price-performance ratio.

Comments

mahonj

A battery that could be recharged 5400 times could be charged twice every week day for 10-11 years and would make an ideal battery for a small battery PHEV.

Thus, it would be very useful.

HarveyD

Another great step towards improved batteries for future PHEVs and BEVs. Increasing cycle life by 2.7X is no small incremental gain. A few more like this and batteires will last longer than the vehicle unless it is made of aluminium and composites.

Davemart

These would already last way longer than the vehicle.
At a 100 mile range then you get 540,000 miles from these, calender life issues permitting.

mahonj

Or better still, at a 20 mile (5 KwH) range, you get 108 K miles out of it.
And 5 times as many vehicles for the same amount of batteries.

kelly

Maybe this Taiwan company will actually quickly market something without 'needing five or ten further years of research before commercialization.'

Roger Pham

This is great for reducing the cost of HEV's. Toyota's Hybrid Synergy drive is complicated and more expensive because it tries to spare the battery usage as much as possible by minimizing battery boost while using an electric-type of CVT to optimize engine's load.

With this kind of battery durability and lower costs of battery of today, a very simple HEV setup is possible, requiring only a two-speed geared transmission,and a single electric motor, allowing the battery and the electric motor to provide boost whenever acceleration is needed, while the engine is lugged down to provide "base load" at its maximum efficiency load level.

This is also makes PHEV's even more economical by encouring ~15-mile range PHEV to keep cost down. A 15-mile electric range PHEV with a modest 4.5 kWh pack can be charged twice daily, 5 days a week on average,or 10 times per week, making it 520 times yearly, thus the battery will last for over 10 years before degrading down to 80% of capacity...depending on calendar-life degradation factor...making battery electricity much cheaper than petrol fuel and will encourage mass adoption of PHEV's.

Davemart

Roger, whatever the chemistry you still get far more life out of a battery by not charging it to 100% or depleting it to flat every time.
For the type of usage pattern you suggest it would make far more sense to have a ~30 mile range battery and keep use within a conservative SOC.
That way your battery life will easily exceed the life of the car, probably by a very large margin.

GreenPlease

With this sort of a battery lifetime, it makes sense for the battery to be owned separate of the car. For example, a company could specialize in building and owning the batteries and lease them to the consumer. This would dramatically lower the upfront cost of a BEV to the consumer. In fact, it might make the upfront cost of BEVs less than a comparable ICE power vehicle.

That said, batteries with this treatment are ideal for PHEVs as everyone else has stated.

Roger Pham

4.5 kWh and 15 mile range is not depleting the battery completely, comparable to the Prius PHEV.

Davemart

Roger, the battery in the Prius plug-in is a very sophisticated and expensive bit of kit.
Check our the price premium on the conventional Prius.
OTOH the less sophisticated batteries in the Leaf are around $400 kwh judging by the leasing costs.

HarveyD

If life time battery duration can be so easily increased by 2.7 times at a lower cost, could energy density follow the same upgrade (and more) by 2020 or so?

Is it possible to imagine an affordable quick charge 85 Kwh battery pack that would last 15+ years in our 2020+ e-vehicles?

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