Werner Daniel, Griesser Christoph, Stock David, Griesser Ulrich J, Kunze-Liebhäuser Julia, Portenkirchner Engelbert
Institute of Physical Chemistry, University of Innsbruck, A-6020 Innsbruck, Austria.
Institut für Konstruktion und Materialwissenschaften, University of Innsbruck, A-6020 Innsbruck, Austria.
ACS Appl Energy Mater. 2020 Apr 27;3(4):3477-3487. doi: 10.1021/acsaem.9b02541. Epub 2020 Mar 12.
Developing sodium (Na)-ion batteries is highly appealing because they offer the potential to be made from raw materials, which hold the promise to be less expensive, less toxic, and at the same time more abundant compared to state-of-the-art lithium (Li)-ion batteries. In this work, the Na-ion storage capability of nanostructured organic-inorganic polyaniline (PANI) titanium dioxide (TiO) composite electrodes is studied. Self-organized, carbon-coated, and oxygen-deficient anatase TiO -C nanotubes (NTs) are fabricated by a facile one-step anodic oxidation process followed by annealing at high temperatures in an argon-acetylene mixture. Subsequent electropolymerization of a thin film of PANI results in the fabrication of highly conductive and well-ordered, nanostructured organic-inorganic polyaniline-TiO composite electrodes. As a result, the PANI-coated TiO -C NT composite electrodes exhibit higher Na storage capacities, significantly better capacity retention, advanced rate capability, and better Coulombic efficiencies compared to PANI-coated Ti metal and uncoated TiO -C NTs for all current rates (C-rates) investigated.
开发钠离子（Na）电池极具吸引力，因为它们有可能采用原材料制成，与最先进的锂离子（Li）电池相比，这些原材料有望成本更低、毒性更小，同时储量更丰富。在这项工作中，研究了纳米结构的有机-无机聚苯胺（PANI）二氧化钛（TiO）复合电极的钠离子存储能力。通过简便的一步阳极氧化工艺，随后在氩气-乙炔混合物中高温退火，制备出了自组装、碳包覆且缺氧的锐钛矿型TiO -C纳米管（NTs）。随后对聚苯胺薄膜进行电聚合，从而制备出高导电性且有序的纳米结构有机-无机聚苯胺-TiO复合电极。结果表明，在所有研究的电流倍率（C倍率）下，与聚苯胺包覆的钛金属和未包覆的TiO -C NTs相比，聚苯胺包覆的TiO -C NT复合电极表现出更高的钠存储容量、显著更好的容量保持率、更优异的倍率性能以及更好的库仑效率。
