Preparation of Layer Structured Titanates and Application as Cathode Materials in Rechargeable Lithium Batteries

层状结构钛酸盐的制备及其在可充电锂电池正极材料中的应用

• 批准号: 16550170
• 负责人: OHASHI Masao
• 金额: $ 1.02万
• 依托单位: Tokuyama College of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16550170/
• 关键词: titanate; layer structure; ion exchange; lithium; battery; cathode; ニオブ; 層状

Ion exchange and intercalation properties of the layer structured titanates have been extensively studied. In a previous study, we showed that the layer structured titanate of Cs_xTi_<2-x/4>O_4 exhibited electrochromism by electrochemical redox reactions. Although it was difficult to charge this cathode in the lithium cell, it sems that it is feasible to use the layer structured titanate for cathode materials of the intercalation (rechargeable) lithium batteries. In this study, the layer structured titanates of Cs_xTi_<2-x/2>Mg_<x/2>O4 (x = 0.70), K_xTi_<2-x>Fe_xO_4(x = 0.80), CsTiNbO_5 and CsTi_2NbO_7 have been prepared in solid state reactions using cesium carbonate, potassium carbonate and metal oxides. Alkali and hydrogen ion exchange reactions of these titanates have been studied in aqueous solutions. The single phases of ion exchange products were obtained from the all titanates. They contained interlayer water and the host layers were retained on the ion exchanges. The interlayer water was removed by heating at 110-180℃ in a vacuum.The ion exchange products of Li_<0.51>H_<0.07>Cs_<0.12>Ti_<1.65>Mg_<0.35>O_4, H_<0.79>K_<0.01>Ti_<1.20>Fe_<0.80>O_4, Cs_<0.10>Li_<0.60>H_<0.30>TiNbO_5 and Cs_<0.06>Li_<0.94>Ti_2NbO_7 were evaluated for their uses as the cathode materials in the intercalation (rechargeable) lithium batteries. The cathodes exhibited discharge and charge capacities of 120 and 110 mAh/g, 107 and 69 mAh/g, 130 and 100 mAh/g, 108, and 80 mAh/g for the first cycle in the voltage range of 1.5 - 4.2 V, respectively. It has been found that the ion exchange derivatives of the layer structured titanates can be promising candidates for the cathode materials of the intercalation (rechargeable) lithium batteries. These cathode materials are nontoxic, inexpensive and environmentally benign. It seems that the aim of this study was achieved.

层状钛酸盐的离子交换和插层性能已被广泛研究。在以前的研究中，我们发现层状结构的钛酸盐Cs_xTi_<2-x/4>O_4通过电化学氧化还原反应表现出电致变色性。虽然在锂电池中对这种阴极进行充电是困难的，但似乎可以将层状结构的钛酸盐用作插层（可再充电）锂电池的阴极材料。本文以碳酸铯、碳酸钾和金属氧化物为原料，采用固相反应法制备了层状结构的钛酸盐Cs_xTi_2-x/2&gt;Mg_x/2&gt; O_4（x = 0.70）、K_xTi_<2-x>Fe_xO_4（x = 0.80）、CsTiNbO_5和CsTi_2NbO_7。在水溶液中研究了这些钛酸盐的碱和氢离子交换反应。所有钛酸盐的离子交换产物均为单相。它们含有层间水，并且主体层保留在离子交换上。在110-180℃真空加热除去层间水，评价了离子交换产物Li_<0.51>H_<0.07>Cs_<0.12>Ti_<1.65>Mg_<0.35>O_4、H_<0.79>K_<0.01>Ti_<1.20>Fe_<0.80>O_4、Cs_<0.10>Li_<0.60>H_<0.30>TiNbO_5和Cs_<0.06>Li_<0.94>Ti_2NbO_7作为插层锂电池正极材料的性能。阴极在1.5 - 4.2V的电压范围内的第一次循环分别表现出120和110 mAh/g、107和69 mAh/g、130和100 mAh/g、108和80 mAh/g的放电和充电容量。研究发现，层状结构钛酸盐的离子交换衍生物可以作为嵌锂（可充电）电池的阴极材料。这些阴极材料无毒、廉价且对环境友好。看来本研究的目的已经达到。

项目成果

層状チタン酸塩K_xTi_<2-x>Fe+xO_4(x=0.80)のイオン交換とリチウム二次電池正極材料への応用

层状钛酸盐K_xTi_<2-x>Fe+xO_4(x=0.80)的离子交换及其在锂二次电池正极材料中的应用

• 发表时间: 2005
• 期刊: 徳山工業高等専門学校研究紀要 第29号
• 作者: Minoru Kumeda;Yoshitaka Sekizawa;Akiharu Morimoto;Tatsuo Shimizu;大橋 正夫
• 通讯作者: 大橋 正夫

層状結晶CsTiNb0_5のイオン交換とリチウム二次電池正極への応用

层状晶体CsTiNb0_5的离子交换及其在锂二次电池正极中的应用

• 发表时间: 2006
• 期刊: 徳山工業高等専門学校研究紀要 30号
• 作者: Kaoru Shimamura;Nobuyuki Michiaki;Takaya Ikeda;Tetsuya Uchida;Manabu Hirao;Masao OHASHI;M.Kumeda et al.;大橋 正夫;Masao OHASHI;大橋正夫
• 通讯作者: 大橋正夫

Preparation and Ion Exchange of Layer Structured Titanate Cs_xTi_<2-x/2> Mg_<x/2> O_4

层状结构钛酸盐Cs_xTi_<2-x/2>Mg_<x/2>O_4的制备及离子交换

• 发表时间: 2004
• 期刊: Research Report of the Tokuyama College of Technology No.28
• 作者: Minoru Kumeda;Yoshitaka Sekizawa;Akiharu Morimoto;Tatsuo Shimizu;大橋 正夫;M.Kumeda et al.;Masao OHASHI;M.Kumeda;Minoru Kumeda et al.;大橋正夫;大橋 正夫;Masao OHASHI
• 通讯作者: Masao OHASHI

層状結晶CsTiNbO_5のイオン交換とリチウム二次電池醜材料への応用

层状晶体CsTiNbO_5的离子交换及其在锂二次电池丑材料中的应用

• 发表时间: 2006
• 期刊: 徳山工業高等専門学校研究紀要 第30号
• 作者: Kaoru Shimamura;Nobuyuki Michiaki;Takaya Ikeda;Tetsuya Uchida;Manabu Hirao;Masao OHASHI;M.Kumeda et al.;大橋 正夫
• 通讯作者: 大橋 正夫

層状チタン酸塩K_xTi_<2-x>Fe_xO_4(x=0.80)のイオン交換とリチウム二次電池正極材料への応用

层状钛酸盐K_xTi_<2-x>Fe_xO_4(x=0.80)的离子交换及其在锂二次电池正极材料中的应用

• 发表时间: 2005
• 期刊: 徳山工業高等専門学校研究紀要 29号
• 作者: Minoru Kumeda;Yoshitaka Sekizawa;Akiharu Morimoto;Tatsuo Shimizu;大橋 正夫;M.Kumeda et al.;Masao OHASHI;M.Kumeda;Minoru Kumeda et al.;大橋正夫
• 通讯作者: 大橋正夫