-
-
In a joint presentation with Soeren Striepe at The Battery Show North America in Detroit,
we tried to approach the topic of next-gen battery stack pressure from complementary materials and engineering perspectives.
-
To the best extent of our current understanding, a major advantage of Li-ion batteries with Si/carbon anodes and semi-solid
or liquid carbonate-based electrolytes is that the absence of significant excess stack pressure beyond normal assembly appears feasible.
-
1-5 bar excess pressure appears suitable for semi-solid and all-solid polymer cells with lithium metal negative electrodes,
while 5-10 bar might be necessary for all-solid sulfide electrolyte cells with Si or lithium metal negative electrodes.
-
A prospective advantage of all-solid vs. semi-solid cells is the potential of stable cycling with high-voltage cathode materials,
such as LRLO (Li-rich layered oxides with approximately 2 : 1 Mn / Ni content).
-
Our definition of semi-solid: ≥90% solid electrolyte, ≤10% liquid electrolyte (preferably with boiling point of >200°C).
-
This post was also published on LinkedIn.
|
