BREAKTHROUGH SOLID STATE BATTERY –
900
WH/L SAMSUNG [2020]
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Breakthrough
Solid State Battery - 900 Wh/L Samsung [2020] Samsung research was led by
Yong-Gun Lee for an All-Solid-State-Battery (ASSBs). Their goal was to
eliminate dendrites formation and increase coulombic efficiency. To do that
they sandwiched layers of Lithium Nickel-Cobalt-Manganese-Oxide (NMC for short)
mixed with a Sulfide Solid Electrolytes (SSE, show formula on screen), on top
of nanocomposite-layer of Silver-Carbon. All of this is located in between a
foil of Aluminum and Stainless steel as the current collectors. The idea behind
this was to remove lithium foil from the mix and have all lithium atoms part of
the NMC and SSE. This approach diminishes the costs of the overall battery
manufacturing since handling lithium usually needs an oxygen free environment
due to its high reactivity. This is important for a few reasons, in
conventional lithium batteries, the anode comprised of lithium moves freely
towards the positive electrode during discharge. Dendrites are formed during
the charging process when lithium moves back to its initial location thanks to
the free movement enabled by liquid or gel electrolyte. This is the main
limiting factor of how much energy can be store in these batteries since to
control this, the amount of lithium available in the system has to be caped,
limiting the energy density. Sources Nature Article https://www.nature.com/articles/s4156...
Energy
Density https://en.wikipedia.org/wiki/Energy_...
Gaston
Planté https://en.wikipedia.org/wiki/Gaston_...
History
of batteries https://en.wikipedia.org/wiki/History...
Lithium-ion
battery https://en.wikipedia.org/wiki/Lithium...
Cost of
production of lithium ion batteries https://qnovo.com/82-the-cost-compone...
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