一步回流法制备纳米LiMnPO4正极材料
Preparation of nano structured LiMnPO4 by one-step reflux method
本文通过一步回流法，在水和聚乙二醇400 (PEG 400)的混合溶剂中合成了纯相的LiMnPO4纳米材料，并且使用葡萄糖为碳源进行了碳包覆处理。通过扫描电子显微镜(SEM)、X-射线衍射仪(XRD)对材料进行了形貌和物相的分析。结果表明，合成的LiMnPO4纳米材料是由直径约50 nm、长度约400 nm的纳米棒组成，产物的结晶度良好。本文进一步研究了回流过程中溶剂的组成、溶液PH值以及回流加热的时间对产物的影响。结果表明，LiMnPO4纳米棒是在PEG 400为模板，适量浓度的H+催化下形成的。电化学测试结果表明，碳包覆之后的材料在0.05 C (1 C=170 mAh/g)的充放电倍率下具有67 mAh/g的实际容量。
Nano structured LiMnPO4 material was successfully prepared by one-step reflux method in the water & PEG 400 solvent, and was processed by carbon coating with glucose. The materials were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). The results show that the material was consisted of nanorods with diameter of 50 nm and length of 400 nm.The effects of solvent composition, PH value of the solvent and reflux time on the final product were carefully studied. The results reveal that LiMnPO4 nanorods formed under the combined effects of PEG 400 as template and H+ ion as the catalyst. Electrochemical test shows that the capacity of carbon coated LiMnPO4 at 0.05 C was 67 mAh/g.
赵新兵、余红明、谢健、曹高劭、邬春阳、杨召
金属元素无机化合物化学工业电化学工业精细化学工业
LiMnPO4一步回流法聚乙二醇 400PH值生长机理
LiMnPO4one-step refluxPEG 400PH valuegrowth mechanism
赵新兵,余红明,谢健,曹高劭,邬春阳,杨召.一步回流法制备纳米LiMnPO4正极材料[EB/OL].(2011-10-04)[2025-08-18].http://www.paper.edu.cn/releasepaper/content/201110-20.点此复制
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