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Recap – Battery Experts Forum – Frankfurt am Main (Germany) – July 12-14, 2022
Posted on 2022-07-15
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At the recent Battery Experts Forums, the implications of higher lithium salt prices on battery cell costs and how it usually takes several years to bring new lithium salt mining capacity online were much-discussed topics.
This means that product development investments to reduce the amount of lithium per unit of energy density (in Wh/kg) as quickly as possible will be even more valuable than before.
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Key approaches:
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increase voltage (higher energy storage per cycled Li)
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decrease separator/electrolyte layer thickness (less Li needed to provide for ion conductivity between electrodes, make sure safety does not suffer)
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decrease separator porosity (less Li needed to provide for ion conductivity between electrodes)
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decrease electrode porosity (less Li needed to provide for ion conductivity in pores, carefully tune pore size distribution)
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increase electrode thickness/loading on current collector (converts into reduced mass ratio of separator/electrolyte layer vs. electrodes and therefore more effective use of Li for cycling)
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The last 3 approaches can result in reduced power performance, and are therefore viable only to a limited extent if high power is targeted.
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This post was also published on LinkedIn.
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