SIMULATION AND OPTIMIZATION OF THE DUAL LITHIUM ION INSERTION CELL

The galvanostatic charge and discharge of a dual lithium ion insertion (rocking-chair) cell are modeled. Transport in the electrolyte is des cribed with concentrated solution theory. Insertion of lithium into an d out of the active electrode material is simulated using superpositio n, greatly simplifying the numerical calculations. Simulation results are presented for the LixC6\propylene carbonate +1M LiClO4\LiyMn2O4 ce ll, and these results are compared with experimental data from the lit erature. Criteria are established to assess the importance of diffusio n in the solid matrix and of transport in the electrolytic solution. V arious procedures to optimize the utilization of active material are c onsidered. Simulation results for the dual lithium ion insertion cell are compared with those for a cell with a solid lithium negative elect rode.