Graphene-wrapped yolk-shell of silica-cobalt oxide as high-performing anode for lithium-ion batteries.

ABSTRACT: Silica (SiO₂) shows promise as anode material for lithium-ion batteries due to its low cost, comparable lithium storage discharge potential and high theoretical capacity (approximately 1961 mA h g^-1). However, it is plagued by issues of low electrochemical activity, low conductivity and severe volume expansion. To address these challenges, we initially coat SiO₂ with CoO, followed by introducing SiO₂@CoO into graphene sheets to fabricate an anode composite material (SiO₂@CoO/GS) with uniformly dispersed particles and a 3D graphene wrapped yolk-shell structure. The coating of CoO on SiO₂ converted the negative surface charge of SiO₂ to positive, enabling effective electrostatic interactions between SiO₂@

SUBMITTER: Ma J 

PROVIDER: S-EPMC11417458 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature