Phosphorus-doped hollow carbon sphere derived from phytic acid for superior sodium-ion batteries

ABSTRACT

Sustainable biomass-derived carbonaceous material plays an intriguing and promising role in the development of sodium ion batteries (SIBs) electrodes. Herein, we report a low-cost anode material of phosphorus-doped hollow carbon sphere derived from phytic acid (P-HCS). Being tested as the anode in SIB, it shows high capacity, outstanding cycle life, and excellent cycling stability. The P-HCS electrode delivers an initial charge capacity of 278 mAh g⁻¹ at a current density of 20 mA g⁻¹, and 234 mAh g⁻¹ at a current density of 100 mA g⁻¹ after 300 cycles. Moreover, compared with hollow carbon sphere (HCS), the P-HCS exhibited much superior rate capability, with a good capacity retention of 90% at a current density of 500 mA g⁻¹ after 150 cycles.

KEYWORDS:

• Phosphorus-doped
• phytic acid
• hollow carbon materials
• sodium-ion batteries

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [51502183];Natural Science Foundation of Jiangsu Province [BK20150325];