Hydrothermal Preparation of Homogeneous Cobalt Oxide Nanomaterials as Stable Anodes for Superior Lithium Ion Batteries

Abstract

In this study, uniform Co 3 O 4 nanoparticles are prepared via a simple and facile hydrothermal synthesis without calcination treatment. When the Co 3 O 4 nanomaterials are investigated as anodes for lithium ion batteries, a good electrochemical property is achieved. Particularly, the reversible capacity of the as-synthesized Co 3 O 4 nanoparticle has a significant growth from 383 mAh g −1 of the initial cycle to 471 mAh g −1 of the 300th cycle at 2 A g −1 . Moreover, when it recovers to 50 mA g −1 after different current densities, a superior reversible capacity of 695 mAh g −1 can be reached. Such favorable electrochemical properties will make the as-obtained Co 3 O 4 have a good application prospect as anode material for lithium ion batteries.

Facilely synthesized LiFePO4nanocomposites with excellent electrochemical properties as cathodes for lithium ion batteries

“…1,2 The low cost, environmental friendliness, suitable operating voltage (3.4 V), and high theoretical specific capacity of 170 mA h g À1 make it more attractive than other cathode materials. [3][4][5][6] On the other hand, the lack of a sustained FePO 4 coplanar octahedral network and PO 4 tetrahedron lying across the crystalline unit resulted in poor electronic conductivity and slow lithium ion transport in LFP. [7][8][9][10] Consequently, LFP could not be applied widely for high-rate batteries due to its shortcomings.…”