High Performance of a Polydopamine-Coated Graphite Anode with a Stable SEI Layer

Abstract

In this work, we uniformly coated polydopamine (PD) on the surface of graphite particles, thereby enhancing both the rate capability and cyclability of the graphite anode. The wet-based coating method enabled the formation of a uniform PD layer on the graphite surface. We investigated two different coating methods: electrode-scale and powder-scale coating methods. We studied the battery performance of the graphite anode with various PD coating times. PD worked as an artificial solid electrolyte interphase (SEI) layer, thus preventing direct contact between the electrolyte and the graphite surface, while forming an ion-conducting path for Li ions. Thus, the PD-coated graphite electrode showed higher capacity retention and lower resistance compared to graphite because of the high stability of PD as an artificial SEI layer.

Regenerated Graphite-Derived Cellular-Inspired Polydopamine@NiO@Graphite toward Robust Lithium Storage

“…DA consists of amide nitrogen and catechol, which are characterized as defects in the analysis of Raman spectra, and thus, PDA has a stronger D-band intensity than graphite. The higher I D / I G value of the PDA@NiO@G sample is further evidence of the successful coating of PDA . In addition, the NiO@G sample and the PDA@NiO@G sample exhibit characteristic bands of NiO.…”

Highly stable Fe2O3@SnO2@HNCS hollow nanospheres with enhanced lithium-ion battery performance

“…Nevertheless, several modes for enhancing the initial coulombic efficiency, such as prelithiation and decreasing the specific area, have been discussed recently, inspiring possibilities for commercial utilization. 52,53 Fe 2 O 3 @SnO 2 @HNCS maintained a stable discharge capacity of 766.1 mA h g À1 after 100 cycles, which is much higher in comparison with SnO 2 @HNCS (443.2 mA h g À1 ) and HNCS (170.1 mA h g À1 ). A comparison of the cycling performance of Fe 2 O 3 @SnO 2 @HNCS and Fe 2 O 3 -SnO 2 -HNCS is shown in Fig.…”

Quantification of the Carbon-Coating Effect on the Interfacial Behavior of Graphite Single Particles

“…To tackle the issue of low mass transfer of a graphite anode material, several approaches such as coatings, etching, , doping, expansion, and other methods have been applied to improve Li + transportations. Among the various methods, uniform and ultrathin carbon coating on active materials’ surfaces is extremely effective in enhancing the electrochemical properties.…”