The anomalous TGA feature at the Li 2 CO 3 melting point is present in the AR-LMR pathway (see Figure and), unlike the SL-LMR pathway, indicating that Li 2 CO 3 particle size is the decisize factor determining its presence or absence. TGA further reveals that SL-LMR and AR-LMR pathways diverge at the start of lithiation and reconverge following Li 2 CO 3 melting (Figure ). The overall reaction is equivalent to within 0.2% in total mass loss across the two pathways.