Cai Jinyan, Chen Lin, Chen Xiuying
Xinjiang Shihezi Vocational Technical College, Shihezi 832000, China.
Xinjiang Uyghur Autonomous Region Product Quality Supervision and Inspection Institute, Urumqi 830011, China.
J Nanosci Nanotechnol. 2020 Apr 1;20(4):2452-2459. doi: 10.1166/jnn.2020.17309.
A promising anode material for lithium-ion batteries (LIBs) consisting of ultrafine N-doped TiO₂ nanoparticles and N-doped carbon composite has been prepared by an effective sol-gel-calcined strategy. The synergetic effect between N-doped TiO₂ nanoparticles and N-doped carbon provides not only high conductivity paths and strong electron contact interface, but also supply a large surface area along with hindering the nanoparticles aggregation, resulting in excellent lithium-storage performance. When tested as an anode material for LIBs, a high capacity of 292.7 mAh g can be retained after 50 cycles at 0.5 C. Even at 8 C, a satisfactory capacity of 160.3 mAh g can be delivered. These features suggest the N-doped TiO₂/C composite a viable choice for application as an anode material in high-power LIBs.
通过一种有效的溶胶 - 凝胶 - 煅烧策略制备了一种由超细N掺杂TiO₂纳米颗粒和N掺杂碳复合材料组成的、用于锂离子电池（LIBs）的有前景的负极材料。N掺杂TiO₂纳米颗粒和N掺杂碳之间的协同效应不仅提供了高导电路径和强电子接触界面，还提供了大表面积并阻碍了纳米颗粒的聚集，从而产生了优异的储锂性能。当作为LIBs的负极材料进行测试时，在0.5 C下循环50次后仍可保持292.7 mAh g的高容量。即使在8 C时，也能提供160.3 mAh g的令人满意的容量。这些特性表明N掺杂TiO₂/C复合材料是作为高功率LIBs负极材料应用的可行选择。
