Silicon oxide-on-graphite planar composite synthesized using a microwave-assisted coating method for use as a fast-charging lithium-ion battery anode
Journal
Journal of Power Sources
Journal Volume
296
Pages
314-317
Date Issued
2015
Author(s)
Abstract
Abstract A high-performance Si oxide-coated graphite flake (SGF) composite anode for Li-ion batteries (LIBs) is synthesized using a microwave-assisted coating method. In this synthesis, a solution comprising liquid polysiloxanes is used as the Si-containing precursor. Heating the graphite flakes (GFs) with microwave induces the deposition of a Si-containing conformal layer on the GF surfaces, which is subsequently calcined to produce SGFs. When tested as a LIB anode, the resulting SGF exhibits a reversible specific capacity of nearly 480 mAh g-1, 97% capacity retention at a current density of 2.5 A g-1 (approximately 5 C-rate), and 94% capacity retention after 500 cycles with an average Coulombic efficiency > 99.9%. The results suggest new strategies for both designing and synthesizing high-performance anode materials for LIB applications. ? 2015 Elsevier B.V.
Subjects
Anode
Fast-charging
Graphite
Li-ion battery
Microwave synthesis
Silicon
SDGs
Other Subjects
Anodes; Charging (batteries); Coatings; Electric batteries; Electrodes; Graphite; Ions; Lithium; Lithium alloys; Lithium compounds; Microwaves; Secondary batteries; Silicon; Silicon oxides; Silicones; Coulombic efficiency; Fast charging; High-performance anode materials; Li-ion batteries; Lithium-ion battery anodes; Microwave assisted; Microwave synthesis; Reversible specific capacity; Lithium-ion batteries
Type
journal article