High specific capacity of TiO2-graphene nanocomposite as an anode material for lithium-ion batteries in an enlarged potential window

Fabrication of TiO2–graphene composite for the enhanced performance of lithium batteries

“…However, a rapid capacity decay was observed on all bare TiO2 NP electrodes. At 20C, the capacity of TiO 2 /graphene composite was retained at 158 mAh·g -1 , which was comparable to reported reversible capacity of TiO 2 /GNS composites made by other mixing methods (150~160 mAh·g -1 ) at 1C current rate 16,[46][47][48][49][50] . For comparison, at 1C, the TiO 2 /graphene composite demonstrated an initial capacity of 292.3 mAh·g -1 which corresponded to 0.87 formula Li ion, and a reversible capacity of ~247.4 mAh·g -1 after 100 cycles.…”

“…A cathodic peak at ~1.7V and an anodic peak at~2.1V were identified, the results are consistent with previous studies45,46 . Please do not adjust margins Please do not adjust margins Cyclic voltammetry (CV) experiments were conducted to test the electrochemical performance of TiO 2 /graphene composite at a scan rate of 0.5mV·s -1 within a voltage range of 1~3V(Figure 6).…”

High rate capability of TiO2/nitrogen-doped graphene nanocomposite as an anode material for lithium–ion batteries

“…The TiO 2 /nitrogen-doped graphene nanocomposite was synthesized by a facile gas/liquid interface reaction [32][33][34][35]. Briefly, 0.7589 g of TiCl 4 (Tianjin Kermel Chemical Reagent Co., Ltd., China) and 0.0564 g of nitrogen-doped graphene sheets was added in 20 mL of ethylene glycol (EG) (Beijing Chemical Reagent Co., Ltd., China), and then sonicated for 10 h to yield a homogeneous suspension.…”

“…It is usually considered that the semicircle in the high frequency range is related to the charge transfer resistance [35,41]. The Nyquist plots show that the diameter of the semicircle for the TiO 2 /nitrogendoped graphene nanocomposite in the high-medium frequency region is smaller than those of the TiO 2 /graphene nanocomposite and the bare TiO 2 nanoparticles (Fig.…”

Controllable synthesis of Co3O4/polyethyleneimine-carbon nanotubes nanocomposites for CO and NH3 gas sensing at room temperature

“…6b shows the Nyquist plots of the AC impedance for the four samples, which were measured at an open circuit voltage state using 3 M KOH. The EIS was fitted using an appropriate electric equivalent circuit [42] (inset in Fig. 6b) and the obtained impedance parameters are given in Table 1.…”