Details

Autor(en) / Beteiligte

• Guo, S.Z.
• Liu, J.Z.
• Zhou, C.C.
• Zhang, P.L.
• Li, S.
• Yang, Y.
• Chen, L.Y.

Titel

Construction of highly dispersed and electroconductive silver nanoparticles modified mesoporous Co3O4 hollow nanoboxes from Prussian blue analogues for boosting lithium storage performances

Ist Teil von

• Journal of alloys and compounds, 2020-01, Vol.814, p.152305, Article 152305

Ort / Verlag

Lausanne: Elsevier B.V

Erscheinungsjahr

2020

Quelle

Elsevier ScienceDirect Journals

Beschreibungen/Notizen

• A facile strategy for the synthesis of well-conductive Ag nanoparticles decorated mesoporous Co3O4 nanoboxes is reported. The fabrication processes involve a thermal annealing of Co3[Co(CN)6]2 Prussian blue analogue (PBA) template and subsequent in-situ chemical reductive deposition of Ag coating. The obtained electrically conductive Ag-coated Co3O4 hollow nanoboxes (Ag@Co3O4 HNBs) electrodes possess remarkable lithium storage performances as anodes including high reversible capacity, improved rate capability and long-life cyclability than bare Co3O4 HNBs. The optimized Ag@Co3O4 HNB anodes demonstrate high lithium storage capacity of 1015 mA h g−1 at 200 mA g−1, distinguished reactivated capacity (1115 mA h g−1 at 1 A g−1) and decent rate capability (339 mAh g−1 at 5A g−1). The key points of improved electrochemical behaviors for Ag@Co3O4 composites are due to the formation of Co3O4 hierarchical nanostructure with high porosity as well as the enhancement of electrical conductivity introduced by Ag nanoparticles films. The hollow porous microstructure integrating with highly conductive Ag NPs severally act as buffering matrix and conductive networks, which dramatically accommodate the volume expansion and enhance the electrical conductivity, thus remarkably boosting lithium-storage performance. [Display omitted] •The Ag@Co3O4 is fabricated by in-situ chemical deposition of Ag nanoparticles on the surface of Co3O4 hollow nanobox.•The optimized anodes possess high cycling ability, distinguished reactivated capacity and decent rate capability.•The superficial homogenous Ag NPs modification significantly enhance Li+/e− transport kinetics toward lithium storage.