Figure 1: Ordered mesoporous MoO2 and Li-storage performance.
From: Discovery of abnormal lithium-storage sites in molybdenum dioxide electrodes
(a,b) SEM, (c,e) STEM, (d) TEM and (f) HRTEM images of ordered mesoporous MoO2 materials. Electrochemical performance of ordered mesoporous MoO2 (SBET=115 m2 g−1) and bulk MoO2 (Aldrich, SBET=0.23 m2 g−1): (g) voltage profiles and (h) cycle performances at current rate of 0.1 C in 1.3 M LiPF6 (ethylene carbonate/diethyl carbonate (EC/DEC)=3/7, by volume ratio). The value (837.93 mAh g−1) represents the theoretical capacity for MoO2, based on conversion reaction (4 mol of Li per 1 mol of MoO2). Relationship of the Li-storage capacities of the MoO2 electrodes with respective to their surface areas: (i) the first and (j) the tenth lithiation/delithiation. The galvanostatic lithiation/delithiation tests were replicated for three times. Error bars (i,j) represent the standard deviation of the mean about a series of the measured values. Straight line is a linear fit. Scale bars= 100 nm (a,b), 10 nm (c,d), 5 nm (e) and 1.5 nm (f).
