MetricUSA Posted January 8, 2018 Share Posted January 8, 2018 This company claims by replacing the carbon anode with a silicone anode will increase the range of a battery by twice at least... http://www.nexeon.co.uk/technology-2/ Link to comment Share on other sites More sharing options...
Bob Eisenman Posted January 10, 2018 Share Posted January 10, 2018 On 1/8/2018 at 7:14 AM, MetricUSA said: This company claims by replacing the carbon anode with a silicone anode will increase the range of a battery by twice at least... http://www.nexeon.co.uk/technology-2/ "The lattice distance between silicon atoms multiplies as it accommodates lithium ions (lithiation), reaching 320% of the original volume.[3] The expansion causes large anisotropic stresses to occur within the electrode material, leading to fractures and crumbling of the silicon material and ill-fated detachment from the current collector.[14]Prototypical lithium-silicon batteries lose most of their capacity in as little as 10 charge-discharge cycles.[2][15] A solution to the capacity and stability issues posed by the significant volume expansion upon lithiation is critical to the success of silicon anodes." https://en.m.wikipedia.org/wiki/Lithium–silicon_battery Link to comment Share on other sites More sharing options...
Smoother Posted January 10, 2018 Share Posted January 10, 2018 http://www.nexeon.co.uk/technology-2/ QUOTES: "Nexeon has patented a unique way of structuring silicon so that it delivers extended cycle life and significantly increases battery capacity." "Nexeon’s patented silicon structures overcome the previous problems of poor cycle life encountered when using silicon by mitigating the volume expansion issue. These uniquely structured silicon anode materials deliver extended cycle life without degradation of capacity:" end quote its right there at the top of the article. Still, it's an English company, so it won't work unless they can figure out a way of making them leak motor oil all over the driveway. Link to comment Share on other sites More sharing options...
Cranium Posted January 10, 2018 Share Posted January 10, 2018 From their most recent press released six days ago: Nexeon Leads Major Project Aimed at Doubling Range of Next Generation EVs Quote Silicon is currently being adopted as a partial replacement for carbon in battery anodes, typically up to the level of 10% replacement, but problems caused by expansion when the cells are charged and discharged remain a hurdle. The research money they have received is part of the ISCF Faraday Challenge: Batteries for Britain. Page 11 of the details of the requirements for the challenge state under the heading of Importance: National importance of this research on a 10-50 year timescale So maybe they have the theory down. And maybe they produced a sample in the lab. But the biggest hurdle is to scale it up for mass production which is what kills many new promising technologies. I hope they are successful but consumers aren't likely to see anything for many years. Press release: http://www.nexeon.co.uk/news/nexeon-leads-major-project-aimed-at-doubling-range-of-next-generation-evs/ Faraday Challenge details: https://www.epsrc.ac.uk/files/funding/calls/2017/iscffaradaychallengebatteries/ Link to comment Share on other sites More sharing options...
The Fat Unicyclist Posted January 10, 2018 Share Posted January 10, 2018 6 hours ago, Bob Eisenman said: "The lattice distance between silicon atoms multiplies as it accommodates lithium ions (lithiation), reaching 320% of the original volume.[3] The expansion causes large anisotropic stresses to occur within the electrode material, leading to fractures and crumbling of the silicon material and ill-fated detachment from the current collector.[14]Prototypical lithium-silicon batteries lose most of their capacity in as little as 10 charge-discharge cycles.[2][15] A solution to the capacity and stability issues posed by the significant volume expansion upon lithiation is critical to the success of silicon anodes." That's exactly what I was thinking... Link to comment Share on other sites More sharing options...
MetricUSA Posted January 23, 2018 Author Share Posted January 23, 2018 Here is another battery type oddly they have it for electric motorcycles.... https://rideapart.com/articles/new-battery-tech-triple-electric-bike-range Link to comment Share on other sites More sharing options...
RayRay Posted January 28, 2018 Share Posted January 28, 2018 On 1/22/2018 at 10:03 PM, MetricUSA said: Here is another battery type oddly they have it for electric motorcycles... I've been reading a lot about the progress of Lithium-Sulfur (Li-S) batteries lately and I believe they may be the next 'big thing' to hit the market. Further down the road, I look forward to solid-state batteries becoming commercially viable alternatives to Li-ion. (These may come in very low volumes at first, but would be great if they became popular on niche devices like euc's first...) Link to comment Share on other sites More sharing options...
MetricUSA Posted April 11, 2018 Author Share Posted April 11, 2018 I need to mend the title of forum... This is another solid state lithium... And they have tech that others can use to improve thier current batteries! http://www.greencarcongress.com/2018/04/20180411-imec.html Link to comment Share on other sites More sharing options...
The Fat Unicyclist Posted April 12, 2018 Share Posted April 12, 2018 18 hours ago, MetricUSA said: I need to mend the title of forum... This is another solid state lithium... And they have tech that others can use to improve thier current batteries! http://www.greencarcongress.com/2018/04/20180411-imec.html What is the current / standard Wh/L for Li-ion batteries? Link to comment Share on other sites More sharing options...
RayRay Posted April 14, 2018 Share Posted April 14, 2018 On 4/12/2018 at 3:21 AM, The Fat Unicyclist said: What is the current / standard Wh/L for Li-ion batteries? You got me there. This confuses me; not only because I'm metric deficient (damn US education system) but also because you have to account for weight n' stuff... However, to (try) and answer your questions... It seems to me the latest 18650 batteries can deliver 3.5 Ah for a volumetric energy density of roughly 770 Wh/L (270 Wh/kg). [http://dx.doi.org/10.1038/nenergy.2016.141] Other sources seem to put that number higher around 350 Wh/kg (w/cell casing). [https://doi.org/10.1016/j.nanoen.2017.10.023] From what I gather, 18650 2.6Ah cells are around 500Wh/L (200Wh/kg) and 3.6 Ah are well over 700Wh/L (250+ Wh/kg). All I know is that the numbers are changing fast and the industry graph posted below seems to be (already) out-of-date... The real question is: which of these 'emerging technologies' (graph is a couple of years old) is going to make it to market in the near future? Although it received only a brief mention in Green Car, silicon-based anode materials added to already mass produced Li-Ion batteries are almost ready to enter full production. Although, not a game changer yet, I think in another 5 years we will see at least a 25% improvement in capacity (at same weight) and beyond that - batteries that can deliver all of the capacity we have now, but at nearly half the weight. Link to comment Share on other sites More sharing options...
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