“The lithium batteries assembled using purpurin and chemically lithiated
purpurin as working electrodes showed good charge/discharge
characteristics with a reversible capacity of ~90 mAh/g.”

This is at 50 cycles, c/20 rate, there is a fair amount of capacity loss in that first 50 cycles however, it starts at:

“A first discharge capacity of ~196 mAh/g is observed.”

Greater then 50 cycles is not reported. Poor cycle life and poor specific power:

“The discharge capacity of the first discharge cycle at a current rate of
C/20 is much higher than that of C/10 and C/2. The decrease in specific
capacity at higher current rates is due to poor electron conductivity
of purpurin molecule.”

Sorry guys, doesn’t look like a winner at this point.