On 03/27/2015 10:40 AM, Michael Ross wrote:
WIllie2 and I were having a back channel about this topic. Willie was
thinking that LFP had a voltage simnilar to other chemistries. I
thought others might want to see this too.
Here is what the Handbook of Batteries 4th Ed. says. From Table 26.3
Characteristics of Some Positive Electrode Materials:
Order of entries: Material, Specific Capacity (mAh/g), MIdpoint
Voltage vs. Li at C/20, Comments
*LiCoO(2) (LCO) 155, 3.9 *
Most common, Co expensive =>$
*LiNi(1-x-y)Mn(x)Co(y)O(2) (NMC), 140 -180, ~3.8 *
Safer, =<$, capacity depends on upper cutoff V
*LiNi(0.8)Co(0.15)Al(0.05)O(2), 200, 3.75 *
Safe as LCO, high capacity (Tesla?)
*LiMn(2)O(4), 100 - 120, 4.05 *
=<$, Safer than LCO, poor temp stability
*LiFePO(4) (LFP), 160, 3.45 *
Very safe, low volumetric energy, processed in inert gas =>$ process
*Li[Li(1/9)Ni(1/3)Mn(5/9)]O(2), 275 3.8*
High specific capacity, low rate capability, R&D scale only
*LiNi(0.5)Mn(1.5)O(4), 130, 4.6*
Requires electrolyte that is stable at high voltage
I stand corrected. It is implied that "to the best of my recollection"
prefaces every thing I say.
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