Preparation of Particles of Electroactive Transition Metal Compounds

电活性过渡金属化合物颗粒的制备

• 批准号: 20710090
• 负责人: DOKKO Kaoru
• 金额: $ 2.5万
• 依托单位: Yokohama National University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20710090/
• 关键词: ナノ粒子; 水熱合成; リチウム二次電池; ナノ材料; リチウム電池

The olivine-type compound LiMnPO_4 was prepared via a reaction between Li_3PO_4 and a MnSO_4 aqueous solution under hydrothermal conditions at 190℃. The specific surface area and particle morphology of LiMnPO_4 changed depending on the amount of water in the reaction mixtures, and the particle size decreased as the amount of water decreased. It was found that nanosized LiMnPO_4 particles of ca. 50nm can be prepared through the reaction between Li_3PO_4 and the molten aqua-complex of MnSO_4・nH_2O (n=4 or5). Galvanostatic charge and discharge tests revealed that the electrochemical reactivity of LiMnPO_4 at 30℃ increased as the particle size decreased. The small particle size contributes to the decrease in the overpotential for Mn^<2+/3+> redox and to the increase in the utilization of LiMnPO_4 as an active material in the cathode of lithium batteries.

以Li 3 PO 4和MnSO 4水溶液为原料，在190℃水热条件下合成了橄榄石型LiMnPO 4。结果表明，随着反应混合物中水含量的增加，LiMnPO_4的比表面积和颗粒形貌发生变化，且随着反应混合物中水含量的减少，LiMnPO_4的粒径减小。结果表明，Ca.用Li_3PO_4与MnSO_4·nH_2O（n=4或5）熔融水溶液反应，可制得50 nm的Li_3PO_4。恒电流充放电测试表明，LiMnPO_4在30℃下的电化学反应活性随粒径的减小而增大。小粒径有利于降低Mn^（2+/3+）氧化还原过电位，提高LiMnPO_4作为锂离子电池正极活性物质的利用率。

项目成果

Carbon Coating on LiMPO4 (M = Fe, Mn) Particles by Hydrothermal Method

水热法在 LiMPO4 (M = Fe, Mn) 颗粒上包覆碳

• 发表时间: 2008
• 作者: S. Koizumi;K. Dokko;K. Kanamura
• 通讯作者: K. Kanamura

Carbon Coating on LiMPO4 (M=Fe,Mn) Particles by Hydrothermal Method

水热法在 LiMPO4 (M=Fe,Mn) 颗粒上包覆碳

• 发表时间: 2008
• 作者: Ichiro Yamashita;Kenji Iwahori;Shinya Kumagai;小野倫也;獨古薫
• 通讯作者: 獨古薫

溶融アクア錯体を用いたLiMnPO4系正極材料の合成

利用熔融水配合物合成LiMnPO4基正极材料

• 发表时间: 2011
• 作者: 小林智;小林耕平;田代裕樹;宮脇哲也;植田研二;浅野秀文;猫古薫
• 通讯作者: 猫古薫

水熱法によるLiMnPO4 系正極材料の合成

水热法合成LiMnPO4基正极材料

• 发表时间: 2010
• 作者: 八田剛志;獨古薫;渡邉正義
• 通讯作者: 渡邉正義

High rate discharge capability of single particle electrode of LiCoO2

• DOI: 10.1016/j.jpowsour.2008.07.081
• 发表时间: 2009-04-01
• 期刊: JOURNAL OF POWER SOURCES
• 影响因子: 9.2
• 作者: Dokko, Kaoru;Nakata, Natsuko;Kanamura, Kiyoshi
• 通讯作者: Kanamura, Kiyoshi