Simple chemical reduction route for the synthesis of Cu‐modified Co₃O₄nanosheet with enhanced performance as anode material in lithium‐ion batteries

Abstract

Cu-modified Co 3 O 4 nanosheets were designed and fabricated via a facile two-step process by a simple microwave-assisted reaction to synthesise Co 3 O 4 sheets, followed by chemically reducing copper ion on Co 3 O 4 sheets. The structures and morphologies of the obtained sheet-like Cu-modified Co 3 O 4 nanomaterials were characterised by X-ray diffractometer, scanning electron microscopy, and transmission electron microscopy. As the anode materials for the lithium-ion battery applications, the Cu-modified Co 3 O 4 nanosheet electrode delivered an initial discharge capacity of 1208 mAh g −1 and its initial coulombic efficiency was 82.24%, much higher than 74.8% for Co 3 O 4 sheets. More importantly, a reversible capacity of ca. 600 mAh g-1 could be reached at a higher current density of 890 mA g −1. The enhanced electrochemical performance may be attributed the incorporated Cu as well as the porous structure and the sheet-like morphology of the Co 3 O 4 active materials.

Ni-Rich Oxide LiNi0.85Co0.05Mn0.1O2 for Lithium Ion Battery: Effect of Microwave Radiation on Its Morphology and Electrochemical Property

“…11,15 Microwave-assisted synthesis has been widely applied as an important green synthetic method for preparing electrode materials due to its simple, quick, uniform and energy efficient. [25][26][27][28][29] For example, cobalt hydroxide precursor with regular morphology could be controllably prepared under microwave radiation conditions within a short time. 30 In this work, we aim to construct Ni-rich layered LiNi 0.85 Co 0.05 Mn 0.1 O 2 (NCM)-based electrode materials by controlling different synthetic conditions, i.e., microwave-assisted and hydrothermal modification (NCM-WH), microwave-assisted co-= These authors contributed equally to this work.…”