CAJ | 학술논문

为了改进三聚钒酸锂作为锂离子电池正极材料的电化学性能,以LiN03、LiCI和NH4VO3作为反应原料,通过一种简单的低温熔盐合成方法(LT-MSS)在250℃温度条件下制备得到带状LiV3O8纳米材料.X射线衍射(XRD)和X射线光电子能谱(XPS)分析结果表明所得产物为单斜相LiV3O8.扫描电镜(SEM)、透射电镜(TEM)和高分辨透射电镜(HRTEM)照片显示该产物为单晶纳米带形貌.沿[001]方向生长.电化学测试表明该产物储锂量高,循环性能良好.实验结果表明采用低温熔盐合成法制备LiV3O8能够有效提高所得产物的结构、形貌和电化学性能.
위료개진삼취범산리작위리리자전지정겁재료적전화학성능,이LiN03、LiCI화NH4VO3작위반응원료,통과일충간단적저온용염합성방법(LT-MSS)재250℃온도조건하제비득도대상LiV3O8납미재료.X사선연사(XRD)화X사선광전자능보(XPS)분석결과표명소득산물위단사상LiV3O8.소묘전경(SEM)、투사전경(TEM)화고분변투사전경(HRTEM)조편현시해산물위단정납미대형모.연[001]방향생장.전화학측시표명해산물저리량고,순배성능량호.실험결과표명채용저온용염합성법제비LiV3O8능구유효제고소득산물적결구、형모화전화학성능.
To improve the electrochemical properties of lithium trivanadale as cathode active material for lithium ion battery, a facile low temperature molten-salt synthesis (LT-MSS) method was developed to prepare LiV3Og nanobelts at 250 X., using LiNO3, LiCl and NH4VO3 as starting materials. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) results indicate that the products are pure phase monoclinic LiV3O8. Scanning electron microscopy ( SEM ) , transmission electron microscopy (TEM) and high-resolution transmission electron microscopy ( HRTEM) images show that the products are single crystalline nanobelts and grow along [001] direction. Electrochemical tests indicate that the products yield high li+ storage capacity and perform well in the electrochemical cycle testing. Experimental results demonstrate that the synthesis method contributes to the improvement in structural, morphological and electrochemical properties of the obtained lithium trivanadate.