超声辅助对共沉淀法制备富锂锰基正极材料Li[Li_0.144Ni_0.136Co_0.136Mn_0.544]O₂性能影响的研究

通过超声辅助共沉淀法成功制备了富锂锰基正极电极材料,研究了不同的超声时间对材料形貌、结构和电化学性能的影响。研究发现,超声辅助能够使材料颗粒更加均匀,结构更合理,有利于材料电化学性能的提升。当合成前躯体材料超声时间为8h时,复合材料的放电比容量最好,在0.1C的初始放电比容量为327.8 mAh g_-1,均高于未超声的复合材料的265.2 mAh g_-1,1C下循环50圈后放电容量为181.6 mAh g_-1,保持率为84.8%。通过循环伏安法测试和电化学交流阻抗测试,发现超声后的复合材料还原氧化峰电流更大,电荷转移阻抗更小,具有较好的倍率性能。     

煤炭深加工示范项目二氧化碳等污染物排放指标研究

通过对主要煤炭深加工过程的研究,得出与《煤炭深加工示范项目规划》（征求意见稿）中要求的能效、煤耗等指标相对应的二氧化碳和主要污染物排放指标,并预测主要煤炭深加工项目未来对我国碳减排和主要污染物减排工作的影响.     

河涌污染治理生态恢复技术的研究进展

随着经济的快速发展,大量污染物排入河涌导致河涌水体污染问题日趋严重。采取有效的技术措施治理河涌污染势在必行。结合近年来国内外河涌治理的研究成果,综述了河涌治理中生态恢复技术的原理和特点,并指出今后研究方向。     

Research progress on electronic phase separation in low-dimensional perovskite manganite nanostructures

Perovskite oxide manganites with a general formula of R_1-x AxMnO₃ (where R is a trivalent rare-earth element such as La, Pr, Sm, and A is a divalent alkaline-earth element such as Ca, Sr, and Ba) have received much attention due to their unusual electron-transport and magnetic properties, which are indispensable for applications in microelectronic, magnetic, and spintronic devices. Recent advances in the science and technology have resulted in the feature sizes of microelectronic devices based on perovskite manganite oxides down-scaling into nanoscale dimensions. At the nanoscale, low-dimensional perovskite manganite oxide nanostructures display novel physical properties that are different from their bulk and film counterparts. Recently, there is strong experimental evidence to indicate that the low-dimensional perovskite manganite oxide nanostructures are electronically inhomogeneous, consisting of different spatial regions with different electronic orders, a phenomenon that is named as electronic phase separation (EPS). As the geometry sizes of the low-dimensional manganite nanostructures are reduced to the characteristic EPS length scale (typically several tens of nanometers in manganites), the EPS is expected to be strongly modulated, leading to quite dramatic changes in functionality and more emergent phenomena. Therefore, reduced dimensionality opens a door to the new functionalities in perovskite manganite oxides and offers a way to gain new insight into the nature of EPS. During the past few years, much progress has been made in understanding the physical nature of the EPS in low-dimensional perovskite manganite nanostructures both from experimentalists and theorists, which have a profound impact on the oxide nanoelectronics. This nanoreview covers the research progresses of the EPS in low-dimensional perovskite manganite nanostructures such as nanoparticles, nanowires/nanotubes, and nanostructured films and/or patterns. The possible physical origins of the EPS are also discussed from the signatures of electronic inhomogeneities as well as some theoretical scenarios, to shed light on understanding this phenomenon. Finally, the perspectives to the future researches in this area are also outlined.     

A new method to disperse CdS quantum dot-sensitized TiO2 nanotube arrays into P3HT:PCBM layer for the improvement of efficiency of inverted polymer solar cells

We report that the efficiency of ITO/nc-TiO₂/P3HT:PCBM/MoO₃/Ag inverted polymer solar cells (PSCs) can be improved by dispersing CdS quantum dot (QD)-sensitized TiO₂ nanotube arrays (TNTs) in poly (3-hexylthiophene) and [6,6]-phenyl-C₆₁-butyric acid methyl ester (P3HT:PCBM) layer. The CdS QDs are deposited on the TNTs by a chemical bath deposition method. The experimental results show that the CdS QD-sensitized TNTs (CdS/TNTs) do not only increase the light absorption of the P3HT:PCBM layer but also reduce the charge recombination in the P3HT:PCBM layer. The dependence of device performances on cycles of CdS deposition on the TNTs was investigated. A high power conversion efficiency (PCE) of 3.52% was achieved for the inverted PSCs with 20 cyclic depositions of CdS on TNTs, which showed a 34% increase compared to the ITO/nc-TiO₂/P3HT:PCBM/MoO₃/Ag device without the CdS/TNTs. The improved efficiency is attributed to the improved light absorbance and the reduced charge recombination in the active layer.     

工业级己二酸无机杂质元素的光谱研究

建立工业级己二酸中多个无机杂质元素的快速光谱分析方法。己二酸样品经硝酸溶解后直接用电感耦合等离子体发射光谱(ICP-OES)法测定其中的Na、Mg、Al、K、Ca、V、Cr、Mn、Fe、Cu、Zn、Pb等12种无机杂质元素。通过优化仪器工作参数,选择最佳的分析波长,并以Y为内标元素消除了测定过程中的光谱干扰和基体效应。在优化的实验条件下,方法的检出限为0.56~18.20μg·L-1,各元素的加标回收率为92.96%~107.90%,RSD为0.8%~3.3%。方法可实现工业级己二酸中无机杂质元素的快速准确测定。     

国产不溶性硫黄OT20的生产工艺及性能

介绍国产不溶性硫黄(IS)OT20的生产工艺和性能。国产IS OT20是在液流直接法的基础上将液硫温度提高至620~700℃制成。国产IS OT20的不溶性硫含量较高,高温热稳定性较好,分散性达到国外同类产品水平。在全钢子午线轮胎带束层和胎体胶中使用国产不溶性硫黄OT20,胶料的工艺性能和物理性能满足生产要求,半成品未出现喷霜问题。     

两种微生物菌种对园林废弃物高温堆肥影响的研究

以园林废弃物为主要原料,采用高温好氧堆肥工艺,研究了园林废弃物堆肥体系中加入两种微生物菌剂(大华酵素菌速腐剂、金葵子腐杆剂)后温度、物理、化学性质的变化及其对园林废弃物堆肥品质的影响。结果表明,两种微生物菌剂中大华酵素菌对园林废弃物高温腐熟效果较优。添加微生物菌剂的堆肥处理都在堆肥3d后进入高温分解阶段,其中大华酵素菌的堆肥处理温度提高快,温度高且持续时间长,高温(65℃)持续时间可达10d。添加大华酵素菌的处理,腐熟后粒径较小,总养分高于金葵籽腐杆剂,改善了堆肥产品的品质。     

DPT系列双电源自动切换装置功能应用

本文详细介绍了DPT系列双电源自动切换装置的工作原理、操作性能、保护性能进行了详细介绍,对电气接线及主要接点做了充分说明,并结合我厂实际应用效果进行了讲解,阐述该装置是值得推广和应用的。