Li3N@CMK-3. The synthesis and handling of air-sensitive materials were conducted within an argon atmosphere using conventional Schlenk line and glove box techniques. The synthesis of 6nm-Li3N@C was performed using the previously reported procedure 1 with a higher Li3N loading (56% by weight). The process involves dissolution of 0.381 g of Lithium metal (99%, Aldrich) in 10 mL liquid ammonia and infiltration into 0.438 g of activated CMK-3. Lithium metal slowly reacts with ammonia to form LiNH2@CMK-3. The LiNH2@CMK-3 is heated in vacuum at 340 °C, yielding Li3N@CMK-3.