Highly Flexible Graphene/Mn₃O₄ Nanocomposite Membrane as Advanced Anodes for Li-Ion Batteries

Abstract

Advanced electrode design is crucial in the rapid development of flexible energy storage devices for emerging flexible electronics. Herein, we report a rational synthesis of graphene/Mn3O4 nanocomposite membranes with excellent mechanical flexibility and Li-ion storage properties. The strong interaction between the large-area graphene nanosheets and long Mn3O4 nanowires not only enables the membrane to endure various mechanical deformations but also produces a strong synergistic effect of enhanced reaction kinetics by providing enlarged electrode/electrolyte contact area and reduced electron/ion transport resistance. The mechanically robust membrane is explored as a freestanding anode for Li-ion batteries, which delivers a high specific capacity of ∼800 mAh g(-1) based on the total electrode mass, along with superior high-rate capability and excellent cycling stability. A flexible full Li-ion battery is fabricated with excellent electrochemical properties and high flexibility, demonstrating its great potential for high-performance flexible energy storage devices.

Facile Synthesis of V2O5 Hollow Spheres as Advanced Cathodes for High-Performance Lithium-Ion Batteries

“…However, the challenges of high cost and the low capacity of the currently used cathode materials hinder their widespread applications [5,6]. In order to obtain high specific energy, considerable efforts have been devoted to developing materials with a higher specific capacity than the current commercial ones, such as LiCoO 2 (140 mAh·g −1 ), LiMn 2 O 4 (146 mAh·g −1 ), and LiFePO 4 (176 mAh·g −1 ) [7,8].…”

Engineering Graphenes from the Nano- to the Macroscale for Electrochemical Energy Storage

“…10c) [103]. A graphene-based film can also be used to improve the electrochemical properties of a metal oxide, such as ferroferric oxide (Fe 3 O 4 ) [104], [108], by the functions discussed above.…”

Self‐Assembled Graphene‐Based Architectures and Their Applications

“…Effective combination of ultrafine SnO 2 quantum dots on conductive graphene sheets provides abundant active sites for high lithium storage capacity, and the confinement of SnO 2 quantum dots in graphene sheets inhibits the aggregation of each particle for high‐rate cycling stability, which also verified the great potential of the graphene assemblies for the fabrication of advanced LIBs. Other active materials such as Mn 3 O 4 ,171 SnO 2 /Fe 2 O 3 ,172, 173 CoO174 and V 2 O 5 175 could also be incorporated into graphene scaffold via simple self‐assembly methods.…”