Scholarlink

<p>In this study, the effectiveness of element doping in enhancing battery performance was confirmed. Titanium (Ti) and aluminum (Al) were successfully doped into the LiNi<sub>1/3</sub>Mn<sub>1/3</sub>Co<sub>1/3</sub>O<sub>2</sub> (NMC 111) cathode material via the combustion method. XRD results showed that all cathode materials exhibited a single phase with a hexagonal layered structure belonging to the R-3&#xa0;m space group. Rietveld refinement revealed that Al doping in NMC 111 reduced the value of the <i>c</i>-axis lattice parameter and increased cation mixing compared to the pristine sample. In contrast, Ti doping expanded the lattice along the <i>c</i>-axis and reduced cation mixing compared to both the pristine and Al-doped samples, facilitating Li-ion movement during the delithiation/lithiation process. Electrochemical performance evaluations demonstrated that the Ti-doped NMC 111 (NMCT) material achieved the highest initial discharge capacity of 148.55 mAhg<sup>−1</sup> at 3 C and exhibited the highest capacity retention of 92.68% after 30 cycles, outperforming the other samples. Overall, the Ti-doped material showed several advantages over pristine and Al-doped NMC 111, including improved structural stability, reduced cation mixing, and a larger surface area with smaller particle size. Further optimization of the NMCT material was conducted by annealing it at various temperatures for 48&#xa0;h. Results indicated that the optimal annealing temperature was 800&#xa0;°C, promoting excellent electrochemical performance. In conclusion, cation doping has shown great promise in stabilizing the structure and improving the electrochemical performance of lithium-ion batteries.</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

Aluminum and titanium doping: a strategy for enhancing the structure stability and electrochemical performance of NMC 111 for Li-ion batteries

  • 期刊论文

  • 发表日期：

    2025年8月5日

查看全文
  • Kelimah Elong,
  • Muhd Firdaus Kasim,
  • Nurhanna Badar,
  • Azira Azahidi,
  • Norashikin Kamarudin,
  • Lailatul Isti’adzah,
  • Zurina Osman

摘要

In this study, the effectiveness of element doping in enhancing battery performance was confirmed. Titanium (Ti) and aluminum (Al) were successfully doped into the LiNi1/3Mn1/3Co1/3O2 (NMC 111) cathode material via the combustion method. XRD results showed that all cathode materials exhibited a single phase with a hexagonal layered structure belonging to the R-3 m space group. Rietveld refinement revealed that Al doping in NMC 111 reduced the value of the c-axis lattice parameter and increased cation mixing compared to the pristine sample. In contrast, Ti doping expanded the lattice along the c-axis and reduced cation mixing compared to both the pristine and Al-doped samples, facilitating Li-ion movement during the delithiation/lithiation process. Electrochemical performance evaluations demonstrated that the Ti-doped NMC 111 (NMCT) material achieved the highest initial discharge capacity of 148.55 mAhg−1 at 3 C and exhibited the highest capacity retention of 92.68% after 30 cycles, outperforming the other samples. Overall, the Ti-doped material showed several advantages over pristine and Al-doped NMC 111, including improved structural stability, reduced cation mixing, and a larger surface area with smaller particle size. Further optimization of the NMCT material was conducted by annealing it at various temperatures for 48 h. Results indicated that the optimal annealing temperature was 800 °C, promoting excellent electrochemical performance. In conclusion, cation doping has shown great promise in stabilizing the structure and improving the electrochemical performance of lithium-ion batteries.