Scholarlink

<p>Olivine LiMn<sub>1−<i>x</i></sub>Fe<sub><i>x</i></sub>PO<sub>4</sub> (LMFP) cathodes are attractive due to their higher discharge voltage compared to LiFePO<sub>4</sub>. However, the electrochemical performance of LiMn<sub>1−<i>x</i></sub>Fe<sub><i>x</i></sub>PO<sub>4</sub> is compromised by the Jahn–Teller effect of Mn<sup>3+</sup>, as well as its poor electronic conductivity. We utilized radio frequency plasma-enhanced chemical vapor deposition technology with N<sub>2</sub> to achieve N-doping of the surface carbon layer of LMFP, resulting in N-LMFP cathode. Nitrogen doping increases the disorder of pyrolytic carbon, improves the electrical conductivity and suppresses the Jahn–Teller effect of Mn<sup>3+</sup>. N-LMFP cathode exhibited superior rate capability and cycling stability, delivering 152.7 mAh g<sup>−1</sup> at 0.1 C and maintaining 126.5 mAh g<sup>−1</sup> after 348 cycles at 0.5 C with a capacity retention of 90%.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Construction of high-performance N-doped carbon-coated LiMn0.8Fe0.2PO4 cathode by PECVD technology for lithium-ion batteries

  • 期刊论文

  • 发表日期：

    2025年5月5日

查看全文
  • Yaqi Deng,
  • Yiting Wang,
  • Yiwen Liu,
  • Zhenjie Zhang,
  • Wei Li,
  • Haoshen Zhou,
  • Ping He

摘要

Olivine LiMn1−xFexPO4 (LMFP) cathodes are attractive due to their higher discharge voltage compared to LiFePO4. However, the electrochemical performance of LiMn1−xFexPO4 is compromised by the Jahn–Teller effect of Mn3+, as well as its poor electronic conductivity. We utilized radio frequency plasma-enhanced chemical vapor deposition technology with N2 to achieve N-doping of the surface carbon layer of LMFP, resulting in N-LMFP cathode. Nitrogen doping increases the disorder of pyrolytic carbon, improves the electrical conductivity and suppresses the Jahn–Teller effect of Mn3+. N-LMFP cathode exhibited superior rate capability and cycling stability, delivering 152.7 mAh g−1 at 0.1 C and maintaining 126.5 mAh g−1 after 348 cycles at 0.5 C with a capacity retention of 90%.