本文選題：鋰離子電池 + 正極材料�。� 參考：《粉末冶金技術(shù)》2014年06期

【摘要】：以LiOH·H2O、NH4VO3、NH4H2PO4和葡萄糖為原料,采用水熱法制備碳包覆的磷酸釩鋰化合物,利用XRD、SEM、TEM、恒流充放電測試、交流阻抗測試等手段,對產(chǎn)物的結(jié)構(gòu)、形貌和電化學(xué)性能進(jìn)行表征,研究了碳含量對材料電化學(xué)性能的影響。結(jié)果表明,在750℃焙燒的樣品為單一純相的單斜晶體結(jié)構(gòu),顆粒大小約1μm,分散性良好,且在顆粒表面包覆了一層無定形碳。在倍率0.1 C的電流密度下,在3.0~4.8 V電壓范圍內(nèi),碳含量為10.63%的樣品首次放電容量達(dá)到163.6 m Ah/g;循環(huán)50次后,放電容量仍為156.5 m Ah/g,容量保持率為95.7%。
[Abstract]:Carbon-coated lithium vanadium phosphate compounds were prepared by hydrothermal method from LiOH H _ 2O _ 3 NH _ 4VO3H _ 4H _ 2PO _ 4 and glucose. The structure, morphology and electrochemical properties of the products were characterized by XRDX SEMMOTEM, constant current charge-discharge test, AC impedance measurement and so on. The effect of carbon content on the electrochemical properties of the materials was studied. The results show that the sample calcined at 750 鈩，

本文編號：1930829