小浪底电厂固定资产会计核算与管理

固定资产是小浪底电厂赖以生存和发展的重要物质基础,做好固定资产的会计核算,对小浪底电厂正常运行发挥着重要作用.在小浪底电厂固定资产的会计核算程序中,通过对固定资产科学分类和编码,进行固定资产卡片管理,实现了会计核算与实物管理的对接.     

Pressure and temperature dependent up-conversion properties of Yb~(3+)-Er~(3+) co-doped BaBi_4Ti_4O_(15) ferroelectric ceramics

Yb3+ and Er3+ co-doped BaBi4Ti4O15(BBT) ceramic samples showed brighter up-conversion photoluminescence(UC-PL) under excitation of 980 nm. The monotonous increase of fluorescence intensity ratio(FIR) from 525 to 550 nm with temperature showed that this material could be used for temperature sensing with the maximum sensitivity to be 0.0046 K–1 and the energy difference was 700 cm–1. Moreover, the sudden change of red and green emissions around 400 oC might imply a phase transition. With increasing pressure up to 4 GPa, the PL intensity decreased but was still strong enough. These results illustrated the wide applications of BBT in high temperature and high pressure conditions.     

新型固态聚合物电解质在锂硫电池中的性能研究

本工作采用（氟磺酰）（三氟甲基磺酰）亚胺锂{Li[(FSO2)(CF3SO2)N],LiFTFSI}和聚氧乙烯（PEO）分别作为导电锂盐和聚合物主链,通过简单的溶液浇铸法制备了新型固态聚合物电解质（SPEs）,并采取示差扫描量热（DSC）、热重（TGA）、线性扫描伏安（LSV）、交流阻抗（EIS）和恒电位直流（DC）极化等方法研究了LiFTFSI/PEO （EO/Li+摩尔比为16）电解质的理化性质和电化学性质。结果表明,LiFTFSI/PEO电解质具有较高的室温离子电导率（σ ≈10−5 S/cm）,较高的氧化电位（4.63 V vs. Li/Li+）,并且耐热温度高达256 ℃。锂硫电池测试结果表明,该类SPEs展现出相对高的首周放电比容量（881 mA•h/g）,有效地抑制了多硫离子的“穿梭效应”,表现出良好的电池循环性能。     

Pressure and temperature dependent up-conversion properties of Yb3＋-Er3＋ co-doped BaBi4Ti4015 ferroelectric ceramics

Yb^3＋ and Er^3＋ co-doped BaBi4Ti4015 （BBT） ceramic samples showed brighter up-conversion photoluminescence （UC-PL） under excitation of 980 nm. The monotonous increase of fluorescence intensity ratio （FIR） from 525 to 550 nm with temperature showed that this material could be used for temperature sensing with the maximum sensitivity to be 0.0046 KI and the energy dif- ference was 700 cm-1. Moreover, the sudden change of red and green emissions around 400 ℃might imply a phase transition. With increasing pressure up to 4 GPa, the PL intensity decreased but was still strong enough. These results illustrated the wide applications of BBT in high temperature and high pressure conditions.     

钠离子电池正负极材料研究新进展

锂离子电池由于能量密度高、循环寿命长等优点在储能领域备受关注,但锂资源稀缺与分布不均制约了其大规模应用。基于与锂离子电池相似离子穿梭原理的钠离子电池,由于钠资源丰富、成本低廉、适合于大规模储能等优点近年来发展迅速。介绍一些典型的钠离子电池正负极材料的研究新进展,评述其应用可行性及目前面临的问题,为长寿命、低成本钠离子电池的设计与开发提供参考依据。