The enhanced anodic performance of highly crimped and crystalline nanofibrillar carbon in lithium-ion batteries

Microspheres composed of multilayer graphene as anode material for lithium-ion batteries

“…It can be seen that the voltage for intercalation is lower in MG (0.25 V) than in MMG (0.50 V), suggesting the low barrier energy for intercalation in MG. The difference might be due to the presence of a reduced number of edges of graphene layers in MG [17], which is confirmed by SEM images of Fig. 1a and d. For MMG, the first-cycle charge and discharge capacities are 1560 and 453 mAh g À1 , respectively, while the corresponding capacities of MG greatly decrease to 1195 and 229 mAh g À1 , respectively.…”

Towards High Performance Anodes with Fast Charge/Discharge Rate for LIB Based Electrical Vehicles

“…To have short diffusion path and high transportation rate of electrons without substitution or additional treatment of the active material, morphology control techniques have been adopted (Chan et al, 2008;Cho et al, 2007;Fang et al, 2009;Hu et al, 2007;Kim et al, 2006;Lampe-Onnerud et al, 2001;Subramanian et al, 2006;Takamura et al, 1999;Tao et al, 2007;Wang et al, 2009;Zaghib et al, 2003) to fabricate 1D fibrous structures, 2D sheets or films, and 3D porous or specified structures of the active material (Tao et al, 2007). The commercialized graphites are of spherical shape whereby 2D-laminate structure works for intercalation of Li ions in C/D process.…”

“…(Makovicka et al, 2009;Nuli et al, 2009;Wang et al, 2009;Yoo et al, 2008) Generally, 1D fibrous structure is considered an effective system which strengthens the interfacial contacts in the anode system. (Cho et al, 2007;Kim et al, 2006;Xia et al, 2003) For instance, silicon nanowires directly grown on the current collector can enhance the LIBs anode performance under high C/D rates. Figure 8 illustrates that the 1D Si nanowires have the capacity of about 2000 mAh/g even at 1C rate (about 4200 mA/g of C/D rate), arising from the efficient electron pathway secured from good interfacial contact between 1D Si nanowires and the current collector.…”

Preparation and electrochemical performance of hyper-networked Li4Ti5O12/carbon hybrid nanofiber sheets for a battery–supercapacitor hybrid system

“…As the demand for electric vehicles (EVs) and hybrid EVs (HEVs) increases due to their lower environmental impact, high performance energy storage devices become extremely important [2,7,15,28,47]. However, neither LIBs nor supercapacitors, which are currently considered as the best electrochemical energy storage devices, can meet the needs of practical applications [8,38,39,42].…”