From the “This time for sure!” department, yet another magic battery advance:
As that link keeps putting up an obnoxious “subscribe” pop-up-ad, I’m quoting heavily here:
EV Range Set To Triple With New Lithium Battery Breakthrough
By Brian Westenhaus – Dec 20, 2017, 12:00 PM CST
The University of Waterloo researchers breakthrough involves the use of negative electrodes (the anode) made of lithium metal, a material with the potential to dramatically increase battery storage capacity.
Quanquan Pang, who led the research while he was a PhD candidate at Waterloo said, “This will mean cheap, safe, long-lasting batteries that give people much more range in their electric vehicles.”
The increased storage capacity, or energy density, could boost the distance electric vehicles are able to travel on a single charge, from about 200 kilometers to 600 kilometers (360 miles).
A single ion conducting protective layer is created on the lithium surface. Image Credit: The University of Waterloo. Click image for the largest view.
The team’s research paper has been published in the journal Joule, which at this writing is open access.
It references this article:
An In Vivo Formed Solid Electrolyte Surface Layer Enables Stable Plating of Li Metal
Quan Pang1, Xiao Liang1, Abhinandan Shyamsunder1, Linda F. Nazar1, 2, ,
• A single-ion-conducting protective layer is created on the Li surface in vivo
• Membrane lowers interface charge transfer resistance, Li plates underneath
• Stable, dendrite-free Li plating in long-life symmetric cells up to 8 mA cm−2
• Full cells using high-loading LTO electrodes demonstrate close to 99.99% CE at 5 C
Context & Scale
A stable Li metal anode is key to fulfilling the promises of Li-O2 and Li-S batteries and to increase the energy density of lithium transition metal oxide batteries in liquid electrolyte or solid-state configurations. However, on cycling, Li metal’s tendency to dendritic growth poses safety issues, and the loss of active lithium and accumulation of a high-impedance interphase leads to cell failure. Here, we describe a new strategy to stabilize Li plating by forming a micron-thick Li+-ion conductive solid electrolyte layer in vivo on the Li surface using an electrolyte additive. The glassy homogeneous layer reduces parasitic reactions and eliminates dendrite formation. We achieve a 50-fold lower interfacial charge transfer resistance in Li|Li symmetric cells with stable Li plating/stripping for 2,500 hr at 1 mA cm−2, and over 400 cycles at high rates in cells with an intercalation counter electrode at close to 100% coulombic efficiency with this unique, scalable method.
We describe an efficient yet facile strategy to stabilize Li plating by forming a single Li+-ion solid electrolyte layer in vivo on the Li surface using a rationally designed electrolyte additive. This amorphous, homogeneous layer not only reduces the direct contact and parasitic reactions of Li with the liquid electrolyte but also avoids ion depletion and electric field inhomogeneity at the vicinity of the Li surface, thus eliminating dendrite formation. This is evidenced by a 50-fold lower interfacial charge transfer resistance and an 8-fold longer Sand time in Li|Li symmetric cells. The protection layer maintains chemical and electrochemical stability over repeated plating/stripping cycles. We demonstrate stable Li plating/stripping for 2,500 hr at 1 mA cm−2 in symmetric cells, and efficient Li cycling at high current densities up to 8 mA cm−2. Over 400 cycles were achieved at 5-C rate in cells with a Li4Ti5O12 counter electrode at close to 100% coulombic efficiency.
And the rest of the article looks to be readable at the link…
It does look like it ought to work, but we’ll see when they ship product…