TiO2 nanodisks designed for Li-ion batteries: a novel strategy for obtaining an ultrathin and high surface area anode material at the ice interface

Ultrathin Anatase TiO2 Nanosheets Embedded with TiO2‐B Nanodomains for Lithium‐Ion Storage: Capacity Enhancement by Phase Boundaries

“…This capacity loss is relatively low compared to those in previous reports, in which nanostructured electrode materials or low temperaturetreated TiO 2 materials show a fi rst irreversible capacity loss of 20%−40%. [ 2,48 ] One possible reason to the fi rst-cycle capacity loss is presented as follows. The annealing of hydrogen titanate at 550 °C did not completely eliminate the surface impurities.…”

“…[ 2,20,30 ] Moreover, minor TiO 2 -B decoration generates a large amount of anatase/TiO 2 -B coherent interfaces which could act as attractive storage to accept excess Li. According to previous reports, in the mixed phases of anatase and TiO 2 -B, the electrons in TiO 2 -B are favored to migrate to the anatase phase, while holes prefer to migrate toward TiO 2 -B phase.…”

“…Our anatase/TiO 2 -B biphase AB550 electrode displays better Li-cell performance than most TiO 2 materials, including anatase nanotubes, nanowires, nanodisks, and TiO 2 -B nanotubes. [ 2,15,18,24,39,[55][56][57][58][59][60][61] Compared with those materials, AB550 may not have the advantages of high surface area, small particle size or excellent conductivity, but the unique anatase/TiO 2 -B coherent interfaces contribute an additional lithium storage venue due to a favorable charge separation at the boundary, resulting in good lithium storage performance. Specifi cally, at the rates lower than 1500 mAh g −1 , the gravimetric capacity for AB550 is higher than the reported 6 nm anatase nanoparticles, 3 nm TiO 2 -B nanoparticles as well as mesoporous TiO 2 -B.…”

Facile synthesis of T-Nb2O5 nanosheets/nitrogen and sulfur co-doped graphene for high performance lithium-ion hybrid supercapacitors

“…In the first cycle, the discharge and charge capacities are 203 and 140 mA h g −1 , respectively, indicating the corresponding Coulombic efficiency of 68.9%. The irreversible capacity loss is ascribed to some irreversible side reactions and the formation of solid electrolyte interphase [44]. The discharge and charge capacities in the following charge/discharge cycles are almost the same, keeping a reversible capacity of~168 mA h g −1 .…”

Preparation of a NbN/graphene nanocomposite by solution impregnation and its application in high-performance Li-ion hybrid capacitors

“…Aer the rst cycle, there exists an obvious irreversible capacity loss, and it could be attributable to (i) the formation of a solid-electrolyte interphase (SEI), (ii) irreversible side reactions inside nanostructured electrodes, and/or with functional groups on graphene. 34,35 There is still a reversible capacity of $450 mA h g À1 remaining at the second cycle. The rate capability of the NbN/GNSs electrode was evaluated by charge/discharge experiments at various current densities (Fig.…”