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<p>Phytic acid as the P and C sources, and polyvinyl pyrrolidone (PVP) as the N source and the second C source, N-doped carbon coated on SnP<sub>2</sub>O<sub>7</sub> nanospheres supported by a P-doped carbon skeleton (SPO/C-P@C-N) were fabricated by a facile and environmentally friendly route. Moreover, the effects of the calcining temperature and time, and the carbon content on the physical and electrochemical performance of SnP<sub>2</sub>O<sub>7</sub> were also researched in detail. The SPO/C-P@C-N-1 nanospheres sintered at 600&#xa0;°C for 4&#xa0;h with 30.11 wt.% carbon show the large specific capacity, the superior rate capability, and the good cycling stability. The P-doped carbon skeleton and the N-doped carbon can inhibit the huge change of the volume for SnP<sub>2</sub>O<sub>7</sub> and enhance the electronic conductivity. 404.2 mAh/g is delivered for the SPO/C-P@C-N-1 sample at the current density of 0.5 A/g after 200 cycles. The full cell of LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub>//SPO/C-P@C-N-1 using SPO/C-P@C-N-1 as the anode can power light-emitting diode bulbs, heart-shaped circuit boards and small light strings, showing promising applications.</p>

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Design of N-doped carbon coated on SnP2O7 anode supported by a P-doped carbon skeleton for lithium-ion batteries

  • 期刊论文

  • 发表日期：

    2025年8月26日

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  • Jifen Jiang,
  • Huanhuan Liu,
  • Guiyan Chu,
  • Lijuan Wang,
  • Zhaohui Meng

摘要

Phytic acid as the P and C sources, and polyvinyl pyrrolidone (PVP) as the N source and the second C source, N-doped carbon coated on SnP2O7 nanospheres supported by a P-doped carbon skeleton (SPO/C-P@C-N) were fabricated by a facile and environmentally friendly route. Moreover, the effects of the calcining temperature and time, and the carbon content on the physical and electrochemical performance of SnP2O7 were also researched in detail. The SPO/C-P@C-N-1 nanospheres sintered at 600 °C for 4 h with 30.11 wt.% carbon show the large specific capacity, the superior rate capability, and the good cycling stability. The P-doped carbon skeleton and the N-doped carbon can inhibit the huge change of the volume for SnP2O7 and enhance the electronic conductivity. 404.2 mAh/g is delivered for the SPO/C-P@C-N-1 sample at the current density of 0.5 A/g after 200 cycles. The full cell of LiNi0.5Mn1.5O4//SPO/C-P@C-N-1 using SPO/C-P@C-N-1 as the anode can power light-emitting diode bulbs, heart-shaped circuit boards and small light strings, showing promising applications.