The large capacity LFP cells should be recycled in the same way as all other lithium or li-ion cells. 

There is no change or difference because of the size of the cells.  As with any other cells, you should recycle only cells that were fully discharged and have 0V potential on the terminals.

Follow these steps:

1) Discharge the cell completely to 0V. 
2) Short-circuit the terminals of the cell - connect the PLUS and MINUS poles of the cell with a conductive wire
3) Dispose of the cells at your recycling center or facility. 
4) In some rare cases the recycling company may request some technical datasheets to verify the chemical composition of  a cell. In this case please contact GWL and we will be happy to assist you.

Let us make the best use of  the LFP technology and if need to be disposed of, let us make the better world by recycling in the most responsible way.