Fig. 6: Electrochemistry, chemical and structural stability analysis.

a Cycling performance and (b) corresponding average cell discharge voltage curves over 200 cycles at 67 mA g−1 at 25 °C. c Rate capability in the voltage range of 2.0-4.7 V at 25 °C. The O K-edge RIXS mapping collected with an excitation energy from 526-534 eV after charging to 4.7 V at 20 mA g−1 after 100 cycles for (d) LM15 and (e) LM13. EELS line scans at particle surface in the cycled electrode (f–h) LM15 and (i–k) LM13 at 67 mA g−1 after 200 cycles.