Anatase TiO₂ as a Cheap and Sustainable Buffering Filler for Silicon Nanoparticles in Lithium‐Ion Battery Anodes

Abstract

The design of effective supporting matrices to efficiently cycle Si nanoparticles is often difficult to achieve and requires complex preparation strategies. In this work, we present a simple synthesis of low-cost and environmentally benign aAnatase TiO nanoparticles as buffering filler for Si nanoparticles (Si@TiO ). The average anatase TiO crystallite size was approximately 5 nm. A complete structural, morphological, and electrochemical characterization was performed. Electrochemical test results show very good specific capacity values of up to 1000 mAh g and cycling at several specific currents, ranging from 500 to 2000 mA g , demonstrating a very good tolerance to high cycling rates. Postmortem morphological analysis shows very good electrode integrity after 100 cycles at 500 mA g specific current.

Low‐Temperature Charging and Aging Mechanisms of Si/C Composite Anodes in Li‐Ion Batteries: An Operando Neutron Scattering Study

“…Si is ap rominentc andidate for negative electrode (anode) materials, [2][3][4][5][6][7][8][9][10] owing to its abundance in the earth's crust [11] and its high theoretical capacity. [5] However,o wing to its high volumee xpansion (up to 300 %), the resulting particle cracks, and its reaction with the electrolyte, [5] one strategy is to combine the high gravimetric capacity of Si compounds with graphite.…”

Constructing Three-Dimensional Porous Carbon Framework Embedded with FeSe2 Nanoparticles as an Anode Material for Rechargeable Batteries

“…Nevertheless, there are still some obstacles, including low reversible capacities resulting from larger ionic radius of Na + , which limit their widespread practical applications. Until now, various anode materials for SIBs including carbon materials (e.g., graphene , ), metal oxides (e.g., TiO 2 , − SnO 2 , ), alloys (e.g., Sb, , Sn , ), and so on were investigated. However, low theoretical capacities of carbon materials and huge volume changes in metal oxides and alloys in charge/discharge process hinder their applications.…”

Achieving Ultrafast and Stable Na-Ion Storage in FeSe2 Nanorods/Graphene Anodes by Controlling the Surface Oxide

“…Similarly, metal oxides also usually exist on the surface of TMSes due to the exposure of the metal selenide to air or the incomplete selenization process because TMSes are generally prepared by the selenization of transitional metal oxides (TMOs). − To date, investigations of the influence of surface oxides on some electrode materials have been carried out. On one hand, surface oxides have been shown to act as a buffer layer to mitigate the volume effect and enhance the cycling ability of the electrode materials. − For example, Mullins et al improved the cycling stability of silicon electrodes by introducing a small amount of oxygen on the surface of silicon thin films. Xiong et al proved that lithium ions can easily penetrate and react reversibly with the underlying Si nanowires when there is an oxide layer of a suitable thickness on the surface.…”