Yu Zebang, Ping Hang
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China.
Biomimetics (Basel). 2025 Feb 27;10(3):144. doi: 10.3390/biomimetics10030144.
Titanium dioxide demonstrates promising potential in the energy storage field due to its high theoretical specific capacity and economic viability. However, its practical application is hindered by intrinsic limitations including low electronic conductivity and slow lithium-ion transport. In general, nature inspires the biotemplating synthesis of artificially functional materials with hierarchical structures. Learning from the bioinspired synthesis process, we adopt a facile biomimetic approach to synthesize graphene-based anatase TiO nanoparticle/nanorod hierarchical structure. The rod-shaped anatase is assembled nanoparticles with a diameter of 20 to 50 nm, and the surface of graphene is deposited by nanoparticles of 5 to 10 nm. The composite also possesses a high surface area and a mesoporous structure. This unique structure not only reduces the transportation pathway of lithium ions and electrons but also enhances the electric conductivity and tolerates the volume change. As an anode electrode, the bioinspired hierarchical structure exhibits a high reversible capacity of 160 mA h g after 180 cycles at a current rate of 1C, highlighting the effectiveness of bioinspired design.
二氧化钛因其高理论比容量和经济可行性，在储能领域展现出了广阔的潜力。然而，其实际应用受到诸如低电子电导率和锂离子传输缓慢等固有局限性的阻碍。一般来说，自然界启发了具有分级结构的人工功能材料的生物模板合成。借鉴这种受生物启发的合成过程，我们采用一种简便的仿生方法来合成基于石墨烯的锐钛矿型TiO纳米颗粒/纳米棒分级结构。棒状锐钛矿由直径为20至50纳米的纳米颗粒组装而成，石墨烯表面沉积着5至10纳米的纳米颗粒。该复合材料还具有高比表面积和介孔结构。这种独特的结构不仅减少了锂离子和电子的传输路径，还提高了电导率并能承受体积变化。作为阳极电极，这种受生物启发的分级结构在1C电流速率下经过180次循环后，展现出160 mA h g的高可逆容量，突出了受生物启发设计的有效性。
