Dual-phase spinel Li₄Ti₅O₁₂/anatase TiO₂ nanosheet anchored 3D reduced graphene oxide aerogel scaffolds as self-supporting electrodes for high-performance Na- and Li-ion batteries

Abstract

Self-supporting LTO-AT/RGO composite as anode materiel was prepared via a facile hetero-assembly, freeze-drying, mechanical compression and annealing. They exhibit excellent electrochemical capability when used for LIBs and SIBs.

Advanced and Emerging Negative Electrodes for Li-Ion Capacitors: Pragmatism vs. Performance

“…The benefits of such LTO-TiO 2 combination resulted in improved electrochemical performance, which has been demonstrated by several research groups. For instance, Tian et al prepared LTO/anatase TiO 2 nanosheets anchored on reduced graphene oxide (RGO) as self-supporting electrodes to store Li + ions with a capacity of 86 mAh g −1 at 100 • C [42]. Furthermore, Zhu et al reported a nanocrystalline composite, LTO/TiO 2 /C, which was capable of delivering a discharge capacity of 88 mAh g −1 at 30 • C [43].…”

Recent Developments of Nanomaterials and Nanostructures for High‐Rate Lithium Ion Batteries

“…The synthesised LTO nanosheets have been applied as the anode material in cells, and the discharge capacities as high as 147 and 151.2 mAh g À 1 at 57.1 C and 45.7 C (1 C = 0.175 A g À 1 ) were achieved. [171] Additionally, other LTO nanostructures, such as hierarchical pores, [172] flower-shape structures, [173] nanowire arrays [174] and nanospheres, [175] are able to enhance the rate performance of the ILBs as well because of the large reactive area created between the electrolyte and electrode and the decreased diffusion length for charge carriers (lithium ions and electrons). As an example, Wang et al prepared an anode with LTO cuboid arrays grown on carbon fibre cloth (LTO@CFC) by a hydrothermal process, in which TiO 2 nanowires were first synthesised on CFC, followed by the addition of LiOH in methanol and an annealing treatment at 800°C in argon (Ar) for 10 h. [176] The asprepared material features a corn-like structure, as shown in Figure 18c, with LTO cuboid arrays serving as the corn kernels.…”

Li4Ti5O12−TiO2 Composite Coated on Carbon Foam as Anode Material for Lithium Ion Capacitors: Evaluation of Rate Performance and Self‐Discharge

“…For instance, Tian et al. prepared LTO‐TO nanosheets anchored on reduced graphene oxide as self‐supporting electrodes to store Li + ions with a capacity of 86 mAh g −1 at 100 C . Zhu and coworkers reported a LTO/TO/C nanocrystalline composite which delivered a discharge capacity of 88 mAh g −1 at 30 C .…”

“…[35,36] It has been reported that when TO forms a composite with LTO, it offers abundant grain boundaries to store Li + ions and thus improved electrochemical performance of the LTO-TO composite can be achieved. For instance, Tian et al prepared LTO-TO nanosheets anchored on reduced graphene oxide as self-supporting electrodes to store Li + ions with a capacity of 86 mAh g À 1 at 100 C. [37] Zhu and coworkers reported a LTO/TO/C nanocrystalline composite which delivered a discharge capacity of 88 mAh g À 1 at 30 C. [38] However, these studies mainly focus on the improvement of the rate capacity. The effect of adding TO to LTO anode on the self-discharge of the resulting LICs has not been investigated.…”