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There are some odd disparities between the UT article and this new article. The UT article claimed: "The use of an alkali-metal anode (lithium, sodium or potas
by Recurecur 10y ago
There are some odd disparities between the UT article and this new article. The UT article claimed:
"The use of an alkali-metal anode (lithium, sodium or potassium) — which isn’t possible with conventional batteries — increases the energy density of a cathode and delivers a long cycle life. In experiments, the researchers’ cells have demonstrated more than 1,200 cycles with low cell resistance."
That would seem to completely rule out the lithium-air explanation.
Regarding the mechanism for energy storage, the UT article said:
"The engineers’ glass electrolytes allow them to plate and strip alkali metals on both the cathode and the anode side without dendrites, which simplifies battery cell fabrication. "
Does the "plating and stripping" language imply energy storage/discharge?
The abstract from the paper itself reads:
"The advent of a Li+ or Na+ glass electrolyte with a cation conductivity σi > 10−2 S cm−1 at 25 °C and a motional enthalpy ΔHm = 0.06 eV that is wet by a metallic lithium or sodium anode is used to develop a new strategy for an all-solid-state, rechargeable, metal-plating battery. During discharge, a cell plates the metal of an anode of high-energy Fermi level such as lithium or sodium onto a cathode current collector with a low-energy Fermi level; the voltage of the cell may be determined by a cathode redox center having an energy between the Fermi levels of the anode and that of the cathode current collector. This strategy is demonstrated with a solid electrolyte that not only is wet by the metallic anode, but also has a dielectric constant capable of creating a large electric-double-layer capacitance at the two electrode/electrolyte interfaces. The result is a safe, low-cost, lithium or sodium rechargeable battery of high energy density and long cycle life."
It is also referred to as a "metal-plating battery" in the abstract. I find it mystifying that neither of the terms "plate" or "plating" appears in the Quartz article.