【摘要】 将化学计量比的LiOH·H₂O、Ni（NO₃）₂·6H₂O与超细α-MnO₂纳米线前驱体均匀混合,在800℃下煅烧12 h合成LiNi_0.5Mn_1.5O₄纳米棒。通过XRD、TEM和电化学测试对样品的晶体结构、表面形貌及电化学性能进行了表征。结果表明:超细α-MnO₂纳米线平均直径为10 nm,多根α-MnO₂纳米线聚集成簇。LiNi_0.5Mn_1.5O₄纳米棒直径为50 nm,与α-MnO₂纳米团簇的直径相仿。电化学测试结果表明:LiNi_0.5Mn_1.5O₄纳米棒的初始放电比能量为475 Wh/kg,循环500圈后容量保持率为99%。更多还原

【Abstract】 The Li Ni_0.5Mn_1.5O₄ nanorods were synthesized by sintering the stoichiometric mixture of ultrafine α-MnO₂ nanowires precursor,Li OH · H₂O and Ni（NO₃）₂·6H₂O at 800 ℃ for 12 h in air. The crystal structure,surface morphology and electrochemical performance of the product were investigated by XRD, TEM techniques and electrochemical testing. The results reveal that the ultrafine α-MnO₂ nanowires have an average diameter of 10 nm,which can be aggregated together into a cluster,while the LiNi_0.5Mn_1.5O₄ nanorod has a diameter about 50 nm,similar to that of α-MnO₂ nanowire clusters. The electrochemical performance test exhibits that LiNi_0.5Mn_1.5O₄ nanorod has an initial discharge specific energy of 475 Wh/kg and capacity retention of 99% after 500 cycles.更多还原