Encapsulating biomass-derived SiO_x with internal conductive channels in nitrogen-doped flexible carbon cages for high performance Li ion-battery anodes

Abstract

Facile fabrication of high-performance silicon-based materials from natural and inexpensive biowaste has recently received great attentions. However, the inevitable formation of SiC and waste of organic ingredients limit their practical...

Boosting Conversion of the Si–O Bond by Introducing Fe2+ in Carbon-Coated SiOx for Superior Lithium Storage

“…Various strategies have been developed to improve the electrochemical lithium-storage performance of SiO x -based anodes in the past decade, mainly including nanostructures, composed of other active/inactive components and prelithiation. , Rational nanostructures such as nanorods , and hollow structures , can effectively mitigate volume expansion. Composing with conductive components, including metals, metal oxides, and carbonaceous materials, also helps to improve the electrical conductivity of SiO x -based anodes. − Among them, transition metals and their derivatives (Fe 3 O 4 , Fe–Cr, and TiO 2 ) were employed to modify SiO x , which can effectively increase electrical conductivity and relieve volume expansion. For example, Shen et al employed Co nanoparticles to activate the Li–O bond in Li 2 O for high reversibility of lithium release.…”