摘要
利用苯胺与五氧化二钒干凝胶之间的氧化还原反应,制备了聚苯胺/五氧化二钒(PAn/V2O5)复合物,并采用X射线衍射(XRD)、红外光谱(IR)、循环伏安和恒电流充放电研究了复合物的结构和嵌锂性能。结果表明:PAn/V2O5具有较规整的层间排列结构,嵌入的PAn取代了V2O5层间的部分水分子并在其间形成了V=O…HN氢键,从而使复合物的层间距增大,结构稳定性增强,明显地改善了复合物的嵌锂性能,有效地抑制了比容量的衰减。在电流密度为0.6 mA/cm2时,其首次放电比容量可达218 mAh/g。经10次循环充放电后,放电容量保持率仍为76%,而V2O5干凝胶的仅为31%。
PolyanilineNanadium pentoxide （PAnN2O3） compounds were synthesized by the oxidation of aniline with V2O3xerogel. The structure and Li-ion intercalation properties of PAnN2O3 material were studied by X-ray diffraction （XRD）, infrared spectroscopy （IR）, cyclic voltammetry and galvanostatic charge-discharge methods. The results show that the lamellar structure of V2O3 is preserved, the layer space is increased due to PAn partial replacement water molecules and inserting in interlamellar of V2O3 accompanying with the formation of hydrogen bonding V=O...HN, so Li-ion intercalation properties of the compound is improved greatly and the decrease of discharge capacity is inhibited significantly. With the current density of 0.6 mA/cm2, PAnN205 was exhibited with an initial discharge capacity of 218 mAh/g. The capacity preservation rate of PAn/V2O5 was 76% but that of V2O5xerogel was only 31% after 10 cycles.
出处
《电源技术》
CAS
CSCD
北大核心
2014年第2期229-232,共4页
Chinese Journal of Power Sources
关键词
聚苯胺
五氧化二钒
复合物
锂离子
嵌入
polyaniline
vanadium pentoxide
compound
Li-ion
intercalation
