Electrochemical Properties of Titanium Oxides with Disordered Layer Stacking through Flocculation of Exfoliated Titania Nanosheets
Electrochemical Properties of Titanium Oxides with Disordered Layer Stacking through Flocculation of Exfoliated Titania Nanosheets
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通过剥离二氧化钛纳米片絮凝实现无序层堆积的二氧化钛的电化学性能
DOI：
10.1149/2.0451903jes
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发表时间：
2019
影响因子：
3.9
通讯作者：
Akimoto Junji
中科院分区：
文献类型：
--
作者：
Kijima Norihito;Sakao Mitsumasa;Manabe Takaaki;Akimoto Junji
通过用HCl或LiOH对剥离的二氧化钛纳米片进行絮凝处理，合成了一种新型的层状层状二氧化钛。氮气吸附-脱附等温线表明，喷雾干燥的絮凝体具有由狭缝状孔组成的介孔结构。横截面扫描电子显微镜和透射电子显微镜分析表明，颗粒是由团聚的高度扭曲的片状颗粒组成的。重新堆积的二氧化钛纳米片的紫外可见漫反射光谱取决于重新堆积过程，并且与母体层状化合物相比发生了显着的蓝移。经盐酸絮凝的产物具有较高的初始容量，约为300mAHg−1(截止电压：1.0V)，但在充放电重复过程中，可充电容量逐渐下降。另一方面，经LiOH重新堆积的热处理产物在50次循环中表现出较好的循环性能，充电容量约为150mAHg−1。X射线吸收光谱和循环伏安图证明了钛的氧化还原反应，平均电压取决于层堆积的类型。充放电后电极的X射线衍射分析表明，电极的循环性能取决于电极层结构的稳定性。
A new type of layered titanium oxides with turbostratic stacking has been synthesized via flocculation of exfoliated titania nanosheets with HCl or LiOH. Nitrogen adsorption–desorption isotherms showed that the spray-dried flocculations had mesoporous structures composed of slit-shaped pores. Cross-sectional SEM and TEM analyses clarified that particles were composed of agglomerated highly twisted flakes. UV-Visible diffuse reflectance spectra of restacked titania nanosheets were depended on the restacking process and were significantly blue shifted compared with that for the parent layered compound. The product flocculated with HCl showed a high initial capacity of about 300 mAh g− 1 (cutoff voltage: 1.0 V), whereas rechargeable capacities were gradually decreased during charge-discharge repetition. On the other hand, the heat-treated product restacked by LiOH showed a relatively good cyclability over the 50 cycles, indicating a rechargeable capacity of about 150 mAh g− 1. X-ray absorption spectra and cyclic voltammograms gave the evidence of the redox reaction of titanium, and the average voltage depended on the type of layer stacking. The XRD analyses of electrodes after charge-discharge revealed that the cyclability depended on the stability of layer structure.
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影响因子：
2.5
作者：
Ravel, B;Newville, M
通讯作者：
Newville, M
二氧化钛纳米片喷雾干燥制备多孔二氧化钛的合成及电化学性能
影响因子：
1.6
作者：
M. Sakao;N. Kijima;J. Akimoto;T. Okutani
通讯作者：
T. Okutani
纳米片多孔二氧化钛的合成及电化学性能
DOI：
10.4028/www.scientific.net/kem.566.111
发表时间：
2013
期刊：
Key Engineering Materials
影响因子：
--
作者：
M. Sakao;N. Kijima;M. Yoshinaga;J. Akimoto;T. Okutani
通讯作者：
T. Okutani
由剥离纳米片制造的薄片二氧化钛的表征和电化学性能
DOI：
--
发表时间：
--
期刊：
Journal of Physics and Chemistry of Solids, (accepted for publication) (掲載確定)
影响因子：
--
作者：
J. Awaka;et al.;Y. Takahashi;N. Kijima
通讯作者：
N. Kijima
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
影响因子：
3.7
作者：
Hyung;Tae Woo Kim;J. Choy;Seong‐Ju Hwang
通讯作者：
Seong‐Ju Hwang