Pyrolyzed Organic Pigment as Efficient Surface-Dominated Alkali-Ion Storage Anodes

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Carbonaceous materials are key components for rechargeable alkali-ion battery anodes.
• Developing high-performance and cost-effective anode materials is crucial for advancing battery technology.

Purpose of the Study:

• To investigate the potential of C.I. Pigment Violet 19 (PV19) as a carbon precursor for alkali-ion battery anodes.
• To characterize the electrochemical performance of anodes derived from pyrolyzed PV19.

Main Methods:

• Thermal treatment of PV19 at 600 °C to create porous carbon microstructures.
• Fabrication and electrochemical testing of anode materials in lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs).
• Spectroscopic analyses to elucidate ion storage mechanisms and kinetics.

Main Results:

• PV19-600 anodes exhibited exceptional rate performance and cycling stability in LIBs (554 mAh g⁻¹ over 900 cycles at 1.0 A g⁻¹).
• PV19-600 anodes demonstrated good rate capability and cycling behavior in SIBs (200 mAh g⁻¹ after 200 cycles at 0.1 A g⁻¹).
• Spectroscopic data revealed a surface-dominant storage mechanism facilitated by nitrogen- and oxygen-containing porous structures.

Conclusions:

• Pyrolyzed PV19 is a promising precursor for fabricating high-performance carbon anodes for alkali-ion batteries.
• The nitrogen- and oxygen-rich porous structure enhances alkali-ion storage through surface-dominant processes.
• This study offers a new pathway for developing advanced anode materials from organic pigments.