3 ms·

Previous discussion: https://news.ycombinator.com/item?id=13778543 https://news.ycombinator.com/item?id=13778543 Maybe some additional added detail in this qz.c

by dmoy 10y ago

Previous discussion: https://news.ycombinator.com/item?id=13778543 https://news.ycombinator.com/item?id=13778543 Maybe some additional added detail in this qz.com article, idk.

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.

by dmoy 10y ago

Previous discussion: https://news.ycombinator.com/item?id=13778543 https://news.ycombinator.com/item?id=13778543 Maybe some additional added detail in this qz.com article, idk.

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.