Relationship between Electrode Performance and Chemical Bonding Nature in Mesoporous Metal Oxide-Layered Titanate Nanohybrids
Relationship between Electrode Performance and Chemical Bonding Nature in Mesoporous Metal Oxide-Layered Titanate Nanohybrids
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介孔金属氧化物层状钛酸盐纳米杂化物中电极性能与化学键合性质的关系
DOI：
10.1021/jp910091y
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发表时间：
2009
影响因子：
3.7
通讯作者：
Seong‐Ju Hwang
中科院分区：
文献类型：
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作者：
Hyung;Tae Woo Kim;J. Choy;Seong‐Ju Hwang
我们研究了介孔mox层状钛酸盐（M = Fe或Ni）纳米杂化物作为锂嵌入电极的适用性，以阐明这些材料中电极活性与化学键性质之间的关系。电化学测量清楚地表明，与原始钛酸盐相比，介孔纳米杂化物具有更好的锂阳离子插入电极性能。这一发现强调了与金属氧化物纳米晶的杂化对改善氧化钛的电化学性能是非常有效的。在300°C下焙烧可以进一步改善nio -层状钛酸盐纳米杂化材料的阳极性能，而在相同温度下热处理后的氧化铁同源物的放电容量增加不显著。这种煅烧后的不同影响可以从客体物种的局部结构演化来理解；制备的niox层状二氧化钛中镍的种类…
We investigated the applicability of mesoporous MOx-layered titanate (M = Fe or Ni) nanohybrids as a lithium intercalation electrode to elucidate the relationship between electrode activity and chemical bonding nature in these materials. Electrochemical measurements clearly demonstrate that the mesoporous nanohybrids show better performance of lithium cation intercalation electrodes, compared with the pristine titanate. This finding underscores that hybridization with metal oxide nanocrystals is quite effective in improving the electrochemical property of titanium oxide. The anode performance of the NiOx-layered titanate nanohybrid can be further improved by a postcalcination at 300 °C whereas there is less significant increase in the discharge capacity of the iron oxide homologue after the heat-treatment at the same temperature. Such different effects of the postcalcination can be understood in terms of local structural evolution of guest species; the nickel species in the as-prepared NiOx-layered titana...