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首页> 外文期刊>Bulletin of the Chemical Society of Japan >Chemical Lithiation/Delithiation of K~+-β-Ferrite (K_(1+x)Fe_(11)O_(17))
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Chemical Lithiation/Delithiation of K~+-β-Ferrite (K_(1+x)Fe_(11)O_(17))

机译：K〜+-β-铁氧体（K_（1 + x）Fe_（11）O_（17））的化学锂化/脱锂

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摘要

The chemical lithiation/delithiation of K~+-β-ferrite has been performed using butyllithium, lithium naphthalide (for lithiation), and iodine (for delithiation). In lithiation using butyllithium, the lithium content (y) in K_(1+x)Li_yFe_(11)O_(17) was dependent on the average grain size of K~+-β-ferrite singe crystals; small grains (5 μm) largely reacted with lithium to form K_(0.99)Li_(1.65)Fe_(11)O_(17). Lithiation was performed by the reduction of Fe~(3+) to Fe~(2+). Since the same X-ray diffraction (XRD) patterns were obtained before and after lithiation, the reaction seemed to be restricted to only near the grain surfaces. In lithiation using lithium naphthalide, the lithium content (y), which attained to be 36, was independent of the average grain size of K~+-β-ferrite single crystals. This lithium content was remarkably large, compared to y = ca. 1.6 in lithiation using butyllithium. A large amount of Fe~0 (metal) was detected in the samples. According to scanning electron microscope (SEM) and XRD studies, not only pulverization of grains, but also destruction of the β-structure, occurred upon lithiation. On the other hand, delithiation of deeply lithiated samples was achieved by using iodine as an oxidant.
机译：已经使用丁基锂，萘二甲酸锂（用于锂化）和碘（用于去锂化）进行了K〜+-β铁氧体的化学锂化/去锂化。在使用丁基锂的锂化中，K_（1 + x）Li_yFe_（11）O_（17）中的锂含量（y）取决于K〜+-β-铁氧体单晶的平均晶粒尺寸。小颗粒（5μm）与锂大量反应形成K_（0.99）Li_（1.65）Fe_（11）O_（17）。通过将Fe〜（3+）还原为Fe〜（2+）进行锂化。由于在锂化之前和之后获得相同的X射线衍射（XRD）图案，因此反应似乎仅限于晶粒表面附近。在使用萘二甲酸锂的锂化中，锂含量（y）达到36，与K〜+-β铁氧体单晶的平均晶粒尺寸无关。与y = ca相比，该锂含量非常大。 1.6在锂化中使用丁基锂。样品中检测到大量的Fe〜0（金属）。根据扫描电子显微镜（SEM）和XRD研究，在锂化时不仅发生了颗粒粉碎，而且还破坏了β结构。另一方面，通过使用碘作为氧化剂，可以实现对深锂化样品的脱锂作用。

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