2015 Ram ProMaster City compact van EPA-rated at 24 mpg combined
DOE fuel cell market report shows continued growth, with sales surpassing $1.3B worldwide in 2013

Li-S battery company OXIS Energy reports 300 Wh/kg and 25 Ah cell, predicting 33 Ah by mid-2015, 500 Wh/kg by end of 2018

UK-based Lithium-sulfur battery company OXIS Energy (earlier post) reported developing a Lithium-sulfur cell achieving in excess of 300 Wh/kg. In addition, OXIS has achieved an increase in cell capacity to 25 Ah—a twelve-fold improvement in 18 months. OXIS predicts it will achieve a cell capacity of 33Ah by mid-2015. The company says that vehicle manufacturers are already reviewing and evaluating the cell technology.

The OXIS scientific team expects to achieve a goal of an energy density in excess of 400 Wh/kg by the end of 2016 and in excess of 500Wh/kg by the end of 2018. OXIS CEO Huw Hampson-Jones says that the company is on schedule to release commercial cells for use in applications in the USA and Europe in 2015.

The cells continue to display the enhanced safety features that characterise Li-S with superior safety performance attained in a barrage of industry-standard tests.

OXIS is collaborating with leading European companies and universities to harness the new material developments to enhance energy density and cyclability. OXIS says that the modeling techniques being perfected allow the OXIS scientific team to predict and improve battery performance and operating conditions pertaining to a number of applications including automotive applications.

Achieving the automotive targets is accelerating developments for additional markets such as marine, UAVs, energy storage and military applications that require ultra-light weight battery solutions. These may lead to spin-off projects and additional collaborations in the future. In August, for example, OXIS Energy and Multi Source Power technologies (MSP) formed a partnership to develop Li-sulfur batteries for marine applications.

Oxis Lithium-sulfur cells comprise a Lithium metal anode; sulfur-based cathode; a ceramic lithium sulfide passivation layer; and a non-flammable electrolyte protecting the lithium metal. OXIS cells have a 100% available Depth-of-Discharge and cannot be damaged by over-discharge.

Cycle life is one of the major challenges of Li-S batteries; OXIS reported its Li-S cells in 2012 could be cycled more than 1,000 times (80% Beginning-of-Life), and expects to be able to reach around 2000 cycles before the capacity reduces to 80% BoL.

Comments

electric-car-insider.com

200 mile mid-range BEVs. 500 mile range Tesla Model S.

$1 per gallon equivalent. Effortless overnight refueling. No stink.

Who would buy an ICE?

DaveD

This is the kind of progress we need. We're all so busy looking for a miracle breakthrough that we forget that a bump in incremental improvements adds up.

A Nissan Leaf type vehicle with a true ~175 mile range (and not so damn ugly) would change the auto land scape. That should be available by 2017.

Herman

DaveD, let me state at the outset I enjoy daily driving my leased Leaf. I am an EV operator and happy to be one.

However, I am entirely skeptical of the battery of the day story. You say "~175 mi range... should be available [in the Leaf] by 2017". I bet you USD1000 (one thousand US dollars) that no pure EV Nissan will be available for general purchase in any market for less than USD45k (then-year dollars) base price by the end of CY2017.

Care to take the bet?

Herman

BTW, can anyone link me to a single production cell built by OXIS and delivered to a commercial customer?

Change

Another research company making wild claims without any mass production ever. Sorry but that Gigafactory by Panasonic and Tesla is by far the most realistic hope this world has of getting real world cars with 200 plus miles on the road by 2018 in any large volume. Also the price will not be 35k USD as Musk currently hope/say. It will more likely be between 40k and 45k USD. The launch may also more likely be delayed to 2019.

DaveD

@Herman, You missed one key word in my post: "TYPE" :)

"A Nissan Leaf type vehicle".

I don't think Nissan has the incentive to go that high. But I'm betting that somebody will be trying to get into the game at that time with a BEV in the ~$30K-$35K range that has at least a 175 mile range.

I'm betting the Leaf will probably be somewhere around 140ish real world miles in that time frame.

Lad

Henrik:
Agree, Let me sum up: OXIS, I will believe it when I can use it. Tesla, You ain't hit a Target yet; but. I believe you're truly trying.

DaveD

Henrik and Lad....So young, yet so cynical! :)

Seriously though, I agree with you. This is yet another flavor of the day announcement until they actually deliver something. But it's starting to feel like some realistic, shorter term announcements are coming. I totally discount people saying things like "1000Wh/kg by 2016"....they're smoking something naughty.

But Panasonic already has 255Wh/kg cells for over 18 months in the market so when I'm seeing 300-325Wh/kg predictions for 2017, then I'm hopeful that it may be possible.
And the Leaf is only using cells with something like 140Wh/kg at the cell level so there is plenty of room for a car doing 150-175 real world mile by 2017.

Bob Tasa

I am sorry maybe I misread. You mentioned "300-325Wh/kg predictions for 2017" what I read was a 33Ah by mid-2015 300 Wh/kg for 2015 and 500Wh/kg by 2017.
Thats only 6 months away. But no one mentioned cost per battery. If the cost is not outrageous this will great news for anyone wanting to dump ICE. Fingers crossed these guys are telling the truth.

Nick Lyons

OXIS cells have a 100% available Depth-of-Discharge and cannot be damaged by over-discharge.

Combined with the increased capacity, this implies significantly reductions in pack size/weight as well.

According to their website, the cost target is $250/kWhr.

I wish them well, and hope this is more than vaporware. Encouragingly, their website has pictures of actual cells, etc.

HarveyD

Yes, 'affordable' 500 Wh/Kg by 2017 may be a tipping poing for first generaion competitive extended range BEVs.

One of the majors (like Toyota, Nissan, VW etc), could buy OXIS to get a head start?

DaveD

@Bob Tasa,

I'm going on the assumption that this could turn out to be more hype that never comes to fruition. I was saying that more in terms of SOMEBODY will come out with a real, honest to goodness, it exists AND you can buy it, battery with between 300-325Wh/kg by 2017. :)

If these guys actually deliver their battery with over 300Wh/kg next year...I'll be VERY HAPPY to be proven wrong!

Anthony F

The gravimetric energy gains are great. 500Wh/kg is half the weight of today's batteries. And OXIS seems to be delivering on their roadmap (which is more than I can say for some companies like Envia).

Where Li-S suffers relative to traditional Li-Ion is volumetric density. The 25Ah cells sounds good, but their RevB program for automotive EV cells has a target of 95Ah per cell[1], and that "only" brings their volumetric efficiency to 450Wh/l (compared to 700Wh/l in the cells found in the Model S). Where Li-S batteries can make up the difference is in a drastic reduction in safety and thermal management equipment necessary to use the battery in an EV - so where cells comprise about 70% of the volume and weight of a battery pack in a traditional, Li-S can move than up more, bringing up the total pack-level Wh/l to comparable levels.

[1] I don't know for sure its the automotive cell that is being referenced in the first paragraph. OXIS has 3 different cells they're targeting: ultra-thin, long-life and EV.

SJC

$1 when you don't pay road taxes nor replace batteries.
The battery replacement is about $1000 per year or $2 GGE.
When you don't tell the whole story, it sounds great.

DaveD

@SJC,
So when you do break downs on the ICE vehicles, you also include the cost of all gas you'll ever buy, plus engine rebuilds and transmission rebuilds, plus oil changes, plus fuel pumps, water pumps, radiator issues, timing chains, yada, yada, yada?

Wow, that ICE sounds really good when you don't tell the whole story.

Oh, did I mention that we like to start wars for oil?

Verify your Comment

Previewing your Comment

This is only a preview. Your comment has not yet been posted.

Working...
Your comment could not be posted. Error type:
Your comment has been posted. Post another comment

The letters and numbers you entered did not match the image. Please try again.

As a final step before posting your comment, enter the letters and numbers you see in the image below. This prevents automated programs from posting comments.

Having trouble reading this image? View an alternate.

Working...

Post a comment

Your Information

(Name is required. Email address will not be displayed with the comment.)