(大連海事大學(xué) 交通運(yùn)輸裝備與海洋工程學(xué)院，大連 116026)
摘 要: 針對(duì)V2O5材料電導(dǎo)率低和鋰離子擴(kuò)散動(dòng)力性能差等缺點(diǎn)，通過元素?fù)诫s、表面包覆和微觀形貌調(diào)控等方法可以有效進(jìn)行改善。相比于一維和二維結(jié)構(gòu)材料，三維多級(jí)結(jié)構(gòu)材料既有高比表面積，又由于有良好的自支撐性，而不容易發(fā)生團(tuán)聚。利用不同合成方法將V2O5材料微納米化，制成具有不同形貌的三維多級(jí)結(jié)構(gòu)，材料表現(xiàn)出優(yōu)良的電化學(xué)性能。綜述不同形貌三維多級(jí)結(jié)構(gòu)V2O5材料的合成方法、形成機(jī)理及電化學(xué)性能的研究進(jìn)展，并著重介紹制備工藝與V2O5材料微觀形貌以及V2O5材料微觀形貌和電化學(xué)性能之間的關(guān)系。
關(guān)鍵字: V2O5；三維多級(jí)結(jié)構(gòu)；形貌調(diào)控；形成機(jī)理；電化學(xué)性能
（College of Transportation Equipment and Ocean Engineering, Dalian Maritime University, Dalian 116026, China）
Abstract:In view of the low electric conductivity and the poor lithium-ion diffusion kinetics, the element doping, surface coating and microstructure controlling were demonstrated as an effective strategy to improve these problems. Compared to the one-dimensional and two-dimensional structures materials, the three-dimensional hierarchical structure materials have both high specific surface area, and are not prone to agglomeration because of its good self-supporting properties. The cathode materials V2O5, which possess different morphology three-dimensional hierarchical structure made by different synthetic methods, show excellent electrochemical performances. In this review, the new progress of the synthesis methods, the formation mechanism and the electrochemical performance of different morphology three-dimensional hierarchical structure V2O5 materials were summarized. And the relationship between the preparation process and microscopic morphology as well as between microscopic morphology and electrochemical properties was introduced.
Key words: V2O5; three-dimensional hierarchical structure; morphology-controlling; formation mechanism; electrochemical performance
