Nitrogen-Doped Porous Co3O4/Graphene Nanocomposite for Advanced Lithium-Ion Batteries

Abstract

A novel approach is developed to synthesize a nitrogen-doped porous Co3O4/anthracite-derived graphene (Co3O4/AG) nanocomposite through a combined self-assembly and heat treatment process using resource-rich anthracite as a carbonaceous precursor. The nanocomposite contains uniformly distributed Co3O4 nanoparticles with a size smaller than 8 nm on the surface of porous graphene, and exhibits a specific surface area (120 m2·g−1), well-developed mesopores distributed at 3~10 nm, and a high level of nitrogen doping (5.4 at. %). These unique microstructure features of the nanocomposite can offer extra active sites and efficient pathways during the electrochemical reaction, which are conducive to improvement of the electrochemical performance for the anode material. The Co3O4/AG electrode possesses a high reversible capacity of 845 mAh·g−1 and an excellent rate capacity of 587 mAh·g−1. Furthermore, a good cyclic stability of 510 mAh·g−1 after 100 cycles at 500 mA·g−1 is maintained. Therefore, this work could provide an economical and effective route for the large-scale application of a Co3O4/AG nanocomposite as an excellent anode material in lithium-ion batteries.

V3S4 Nanosheets Anchored on N, S Co-Doped Graphene with Pseudocapacitive Effect for Fast and Durable Lithium Storage

“…As shown in Figure 4a, in the voltage range of 0.005–3 V under 50 mA g −1 , VS/NSG electrode delivers the initial discharge and charge capacity of 1150 and 825 mAh g −1 , respectively. The initial coulombic efficiency (ICE) of V 3 S 4 nanosheet is about 71.7%, which is much higher than that of other transition metal oxides and sulfides, such as SnO 2 [30], CoO [31], Co 3 O 4 [32], V 2 O 3 [4], and VS 4 [13]. After the initial cycle, the overlapped discharge–charge curves suggest the well reversibility of as-prepared VS/NSG.…”

Mesoporous Tubes Composed of Graphitic Carbon-Doped Co3O4 Nanoparticles for Lithium Storage

“…Such a phenomenon is common in the literature reports of transition-metal oxides for LIBs. 46,47 After long cycling 1200 times, it can still achieve the reversible capacity of 665.7 mA h g −1 , accounting for 118.3% of the second cycle (562.8 mA h g −1 ). This capacity is also obviously larger than that of Co 3 O 4 NPs (336.9 mA h g −1 , Figure S2c).…”

A Comprehensive Review on Metal-Oxide Nanocomposites for High-Performance Lithium-Ion Battery Anodes

“…184 In addition, Zeng et al synthesized nitrogen-doped porous materials Co 3 O 4 /anthracite graphene nanocomposites (Co 3 O 4 /AG) by self-assembly and heat treatment process using resource-rich anthracite as a carbon precursor. 185 Huang et al prepared CuO−CNT 3D network composites by utilizing electrostatic interaction in aqueous solution. The composite greatly improves the electrochemical performance.…”

“…Fan et al used polystyrene (PS) microspheres as templates to synthesize an optimized nanocomposite Co 3 O 4 /nitrogen-doped hemispherical porous graphene composite (Co 3 O 4 /N-HPGC) . In addition, Zeng et al synthesized nitrogen-doped porous materials Co 3 O 4 /anthracite graphene nanocomposites (Co 3 O 4 /AG) by self-assembly and heat treatment process using resource-rich anthracite as a carbon precursor …”