准噶尔盆地南缘冲断带侏罗系喀拉扎组沉积特征

为明确准噶尔盆地南缘冲断带深层储集层特征,在露头剖面观测基础上,结合录井、微量元素及重矿物资料,对准噶尔盆地南缘侏罗系喀拉扎组沉积相标志、沉积相类型、物源方向、沉积相展布及沉积模式开展研究.研究区喀拉扎组主要发育冲积扇和辫状河三角洲2种沉积相,平面上发育3个大型沉积体系,自西至东分别是齐古断褶带中段的冲积扇—辫状河三角...     

Nickel electrodeposition from novel citrate bath

A new type of electroplating bath suitable for nickel electrodeposition was developed. Trisodium citrate was used as a complexing agent and a buffer in the bath. The buffering capacity between trisodium citrate and boric acid were compared. The effects were investigated under different conditions of bath composition, current density, pH and temperature on the potentiodynamic cathodic polarization curves, cathodic current efficiency and throwing index, as well as the electrical conductivity of these baths. The optimum conditions for producing sound and satisfactory nickel deposits were： NiSOn6H2O350 g/L, NiCl2·6H2O 45 g/L and Na3C6H5 O7 30 g/L at pH=4 and 55 ℃. The surface morphology of the as-plated Ni deposit was examined by SEM. The results reveal that the nickel deposition obtained from the optimum conditions are composed of compact, non-porous fine grains covering the entire surface. X-ray analysis shows that nickel deposits obtained from the citrate bath have a fine crystal structure compared with deposits from the Watts bath.     

Effect of ball milling and electrolyte on properties of high-voltage LiNi0.5 Mnl.5O4 spinel

Effect of ball milling and electrolyte on the properties of high-voltage LiNi0.5 Mn1.5 O4 was investigated. Ball milling has significant effect on the synthesis and property of LiNi0.5 Mn1.5O4. The X-ray diffraction（XRD） patterns indicate that LiNio.s Mn1.5O4 can＇t be synthesized without ball milling even calcined at 900 ℃. When synthesized with bail milling, LiNi0.5 Mn1.5O4 almost exhibits only one plateau at around 4.7 V. With the increase of ball milling time, the capacity of LiNi0.5Mn1.5O4 increases, but the cycling performance is not highly affected. The electrochemical property of LiNi0.5 Mn1.5O4 highly depends on the electrolyte. The stable and high-voltage-resistant electrolyte is much beneficial to enhancement of electrochemical property of LiNi0.5 Mn1.5O4, such as coulombic efficiency and cycling performance.     

Effect of calcination temperature on characteristics of LiNi1/3Co1/3Mn1/3O2 cathode for lithium ion batteries

LiNi1/3Co1/3Mn1/3O2 was synthesized by sol-gel method and effect of calcination temperature on characteristics of LiNi1/3Co1/3Mn1/3O2 cathode was investigated. The structure and characteristics of LiNi1/3Co1/3Mn1/3O2 were determined by XRD, SEM and electrochemical measurements. The results show that the compound LiNi1/3Co1/3Mn1/3O2 has layered structure with hexagonal lattice. With the increase of calcination temperature, the basicity of the material decreases, and the size of primary particle rises. The LiNi1/3Co1/3Mn1/3O2 calcined at 900 ℃ for 12 h shows excellent electrochemical performances with large reversible specific capacity of 157.5 mA-h/g in the voltage range of 2.75-4.30 V and good capacity retention of 94.03% after 20 charge/discharge cycles. Capacity of LiNi1/3Co1/3Mn1/3O2 increases with enhancement of charge voltage limit, and specific discharge capacities of 179.4 mA.h/g, 203.1 mA.h/g are observed when the charge voltages limit are fixed at 4.50 V and 4.70 V, respectively.     

锈蚀法提取预还原红土镍矿中镍和钴

以国外某红土镍矿经氯化离析法预处理后的还原矿为原料,对锈蚀法处理预还原红土镍矿工艺进行研究,系统考察酸料质量比、空气流量、锈蚀温度、锈蚀时间、搅拌速率以及固液比(固体质量与液体体积比,mg/mL)对铁、镍和钴浸出率的影响。结果表明:在酸料质量比0.10,空气流量1 L/min、锈蚀温度80℃、锈蚀时间8 h、搅拌速率300 r/min和固液比1:10的条件下,镍和钴的浸出率分别达到90.9%和80.2%,铁的浸出率仅为9.9%,实现了铁与镍和钴的分离。     

电镀金刚石耐磨滑履

提高清扫车滑履的耐磨性,是延长滑履使用寿命的关键因素.本文采用复合电镀工艺,用金刚石做磨料,镍锰合金作胎体材料,研制和生产耐磨金刚石滑履,金刚石的品级为MBD4,粒度是0.315～0.25 mm、0.25～0.212 mm、0.212～0.16 mm,各种粒度的比例(质量比)分别是30%、30%和40%.电镀金刚石滑履在室温下进行,pH在3.5～5之间,电流密度0.8～1.2 A/dm2.比较系统地研究了镀液中Mn2 /(Ni2 Mn2 )比值对镍锰合金胎体成分的影响以及镍锰合金比例对胎体的表面洛氏硬度和耐磨性的影响.结果表明:镀液中Mn2 /(Ni2 Mn2 )摩尔比值最佳为0.063,镀层中锰的含量为0.1%,此时镀层的表面洛氏硬度是45±2HRC,用这种胎体配方研制的金刚石滑履的使用寿命将超过4年.     

F-掺杂LiMn2O4的合成及电化学性能

采用溶胶-凝胶法合成掺杂F^-的LiMn2O4。通过XRD、SEM对掺杂F-的LiMn2O4材料的组成、结构、微观形貌等进行分析与表征,测试不同F^-掺杂量的LiMn2O4在常温（20℃）、高温（55℃）下的电化学性能。结果表明：所合成的材料具有良好的尖晶石立方结构,无杂相;F^-的掺杂提高了材料的比容量,增强了材料的稳定性,改善了其在高温下的循环性能。当F^-的掺入量x由0增加到0.1时,材料的比容量由119.7 mA.h/g增加到124.9 mA.h/g,高温下充放电30个循环后容量保持率由79.4%增加到84.4%。     

中拐地区上乌尔禾组浊沸石展布规律及优质储层预测

为明确中拐地区上乌尔禾组浊沸石胶结物展布规律及其与产能的关系,指导中拐地区优质储层预测,分析铸体薄片、黏土矿物、试油结果及区域地层展布.结果表明:中拐地区上乌尔禾组储层以浊沸石胶结为主,且与溶孔含量及产能呈正相关,存在可多保留3%～8%的孔隙度.浊沸石分布受控于砂体沉积微相类型、距P2w碱性水介质源距离,平面上主要发育在湖岸线附近及水下扇三角洲前缘相带,垂向上主要分布于叠置的主河道砂体内.JL2-J205一线以东的水下分流河道区带浊沸石较发育,靠近酸源凹陷有通源断裂沟通,为浊沸石溶孔优质储层发育区,钻探油气显示良好,勘探潜力巨大.     

共沉淀法制备LiNi0.8Co0.1Mn0.1O2过程中加料速度对其性能的影响

采用共沉淀法制备Ni0.8Co0.1Mn0.1(OH)2前驱体,与LiOH.H2O混合后在氧气气氛中焙烧得到LiNi0.8Co0.1Mn0.1O2正极材料,探讨共沉淀反应过程中快速加料和慢速加料制度对前驱体形貌和LiNi0.8Co0.1Mn0.1O2正极材料性能的影响。通过X射线衍射(XRD)、扫描电镜(SEM)和电化学测试对样品进行表征。结果表明:慢速加料法减小了材料的粒径,合成了平均粒径在0.5μm左右的球形Ni0.8Co0.1Mn0.1(OH)2前驱体,且粒径分布比较集中;所合成LiNi0.8Co0.1-Mn0.1O2正极材料具有良好的层状结构,且无杂相存在;缓慢加料法得到的样品的电化学性能有很大提高,在0.1 C、0.5 C和1 C下首次放电比容量分别达到223.5、194.3和190.7 mA.h/g,循环30次后,容量保持率为80.09%、80.80%和85.84%。