(中國科學(xué)院 金屬研究所 金屬腐蝕與防護(hù)國家重點(diǎn)實(shí)驗(yàn)室，
沈陽 110016)
摘 要: 采用一種液相反應(yīng)的方法合成LiV3O8化合物，首先由NH3·H2O，LiOH與V2O5反應(yīng)合成含有Li和V的反應(yīng)前驅(qū)產(chǎn)物，然后在180℃的真空環(huán)境中進(jìn)行干燥處理，最后將此物質(zhì)在580℃溫度下煅燒成最終產(chǎn)物。采用熱重分析試驗(yàn)分析了反應(yīng)的機(jī)理。X射線衍射結(jié)果顯示得到的物質(zhì)與用傳統(tǒng)合成方法得到的LiV3O8化合物的結(jié)構(gòu)相比，在(100)方向上的衍射峰強(qiáng)度降低很多。在室溫、恒電流為3A/m2條件下進(jìn)行充放電試驗(yàn)，在1.8～4.0V范圍內(nèi)，首次放電容量達(dá)到230Ah/kg， 15周后仍能 達(dá)到210Ah/kg。
關(guān)鍵字: 鋰蓄電池；正極材料；釩酸鋰化合物
of LiV3O8 as cathodematerial for
rechargeable lithium batteries
（State Key Laboratory for Corrosion and Protection, Institute of
Metal Research, Chinese Academy of Science, Shenyang 110016, China）
Abstract:A liquid synthesis method was employed to prepare LiV3O8 compound. Firstly, the precursor containing V and Li was made through liquid reaction using NH3·H2O, LiOH and V2O5 as starting reactants, and then the precursor was calcined to become the resulting product at 580℃ for 6h. TGA was used to analys is the reaction mechanism and the X-ray diffraction pattern was used to analysis t he structure of the production. Charge-discharge characteristics of this material were also studied. A specific capacity of 230Ah/kg is available in the range of 1.8～4.0V in the first cycle and 210Ah/kg after 15 cycles. The current density is 3A/m2.
Key words: rechargeable lithium batteries; cathode materials; lithium trivanadate
