Synthesis of Amorphous MoO2 + δ and Its Electrode Performance in Lithium Batteries

Amorphous has been synthesized at ambient temperatures by a reduction of aqueous potassium molybdate solution with potassium borohydride. The sample has been characterized by x‐ray diffraction, differential scanning calorimetry, and transmission electron microscopy. The amorphous exhibits excellent cyclability with a capacity of over 200 mAh/g in the range 3 to 1 V in lithium cells. The electrochemical behavior of amorphous is distinctly different from that of crystalline . Good cyclability at low enough voltage range makes amorphous an attractive candidate for anode hosts in rocking‐chair lithium cells.