Role of the anatase/TiO₂(B) heterointerface for ultrastable high-rate lithium and sodium energy storage performance

Abstract

An ‘ion reservoir’, from an internal electric field and lower Li+/Na+ adsorption energies at an anatase/TiO2(B) interface, ameliorated Li+/Na+ storage.

N-doped porous carbon nanofibers sheathed pumpkin-like Si/C composites as free-standing anodes for lithium-ion batteries

“…The formation of SEI on the electrode surface is due to the electrochemical reduction of organic salt and solvent, and its mor-phology and composition mainly depend on the composition of the electrolyte. It not only affects the kinetics of Li + ion charge/discharge, but also the surface stability during the long cycle [55][56][57][58]. In contrast, Si/C-ZIF-8 exhibits a discharge capacity of 646.7 mA h g À1 after 150 cycles.…”

Recent Advances in Heterostructured Anode Materials with Multiple Anions for Advanced Alkali‐Ion Batteries

“…A study by Liu et al explained the role of the heterointerface in boosting the electrochemical kinetics of electrode materials (Figure 2m), focusing on two effects (formation of built-in electric fields and ion reservoirs). [78] When a heterointerface is formed between anatase and bronze TiO 2 (TiO 2 (B)), positive and negative charges accumulate on the anatase and TiO 2 (B) sides, respectively, and built-in electric field is generated, which directs from the anatase side to the TiO 2 (B) side. [78] As a result, high electrochemical kinetics for alkali metal ions are enabled because the ions, which are easily adsorbed at the heterointerface and form an ion reservoir, are rapidly transported to the TiO 2 (B) side.…”

“…m) Schematic illustration showing the formation mechanism of ion reservoir. Reproduced with permission [78]. Copyright 2020, The Royal Society of Chemistry.…”

Advances in Materials Design for All-Solid-state Batteries: From Bulk to Thin Films

“…Recent progress on Ti-based anode was achieved by porosity control, structural water removal or composite formation. Liu et al [112] studied the interface between a dual anatase/(B) phase nanoflower heterostructure (pore size < 10 nm) formed by a one-step hydrothermal processing method. According to this study, TiO2(B) doping of anatase can effectively improve the pseudocapacitive behavior lowering polarization.…”