Templated Self‐Assembly of Block Copolymers: Top‐Down Helps Bottom‐Up

One of the key challenges in nanotechnology is to control a self‐assembling system to create a specific structure. Self‐organizing block copolymers offer a rich variety of periodic nanoscale patterns, and researchers have succeeded in finding conditions that lead to very long range order of the domains. However, the array of microdomains typically still contains some uncontrolled defects and lacks global registration and orientation. Recent efforts in templated self‐assembly of block copolymers have demonstrated a promising route to control bottom‐up self‐organization processes through top‐down lithographic templates. The orientation and placement of block‐copolymer domains can be directed by topographically or chemically patterned templates. This templated self‐assembly method provides a path towards the rational design of hierarchical device structures with periodic features that cover several length scales.     

医用电解质分析仪的研制

对医学常规体液检查中5种离子浓度的检测,利用单片机、高精度A/D芯片、实时时钟等,给出了一种切实可行的解决方案,并详细地阐述了系统的软硬件设计。     

Preparation of lithium-ion polymer battery using LiNi1/3Co1/3Mn1/3O2 as a cathode material and its electrochemical properties

In this work, LiNi_1/3Mn_1/3Co_1/3O₂ powders were synthesized from co-precipitated spherical metal hydroxide. In the voltage range of 2.8–4.2, 2.8–4.4, and 2.8–4.6 V, the discharge capacities of LiNi_1/3Mn_1/3Co_1/3O₂ electrode were 163, 177, and 193 mAh⋅g⁻¹, respectively. A gel polymer electrolyte (GPE) was also prepared using polyoxyalkylene glycol acrylate (POAGA) as a macromonomer. LiNi_1/3Mn_1/3Co_1/3O₂/GPE/graphite cells were prepared and their electrochemical properties were evaluated at various current densities and temperatures. The ionic conductivity of the GPE was more than 6.2 × 10⁻³ S⋅cm⁻¹ at room temperature. POAGA-based cells were showed good electrochemical performances such as rate capability, low-temperature performance, and cycleability.     

P_2O_5填充的PVDF复合聚合物导电膜的研制与性能研究

以聚偏氟乙烯为基质,加入适量的P2O5,制备了P2O5填充的PVDF复合聚合物质子导电膜,采用交流阻抗谱的方法研究了P2O5的质量分数不同的复合膜的导电性能及相对湿度对电导率的影响.结果表明,该电解质的室温电导率达到10-2 S·cm-1,相对湿度在20%～90%范围内,对电解质的导电性影响不大.     

氧传感器作用原理及其固体电解质的制备

简要讨论了ZrO2基氧传感器的作用原理及用于氧传感器的钇稳定氧化锆粉体的几种制备方法。     

Characterization of Ionic Conducting Cross-linked Polyether Electrolytes

An appropriate amount of toluene 2,4-diisocyanate（TDI） was added into polyether（[（CH2CH2O）13 CH2O]n/Li salt electrolyte to form a cross-linked network,with improving the film proces sability and thermal stability.The relation between the structure and ioinc conductive properties of the cross-lined polyether electrolytes was investigated by means of Fourier transform infra-red spectroscopy（FTIR）,differential scanning calorimetry（DSC）,mechanical property and AC impedance spectroscopy.The electrolytes system is found to have two glass transitions,and it is found that the two Tgs increase with increasing salt concentration.At the some Li salt concentration,the conductivity of cross-liked polyether/LiN（CF3SO2）2 complex system is higher than that of LiClo4,At EO/Li=25：1（mol ratio）,the former conductivity changes with temperature,while the later coincids with Arrhenius formula（σ=Ae^-Ea/RT）.The cross-linked polyether/LiN（CF3 SO2）2 electrolyte exhibits the maximum σ=10^-4.75S/cm at 30℃.     

Preparation and characterization of poly（lithium acrylate-arcylonitrile）／ LiClO4-LiNO3-LiBr solid polymer electrolytes

Through orthogonal experiment, a new type of LiClO₄-LiNO₃-LiBr eutectic salt with optimum mole ratio of n(LiClO₄):n(LiNO₃):n(LiBr) = 1.6:3.8:1.0 was prepared. The poly(lithium acrylate-acrylonitrile)/LiClO₄-LiNO₃-LiBr solid polymer electrolytes were prepared with poly (lithium acrylate-acrylonitrile) and LiClO₄-LiNO₃-LiBr eutectic salts. The effect of LiClO₄-LiNO₃-LiBr eutectic salts content on the conductivity of solid polymer electrolytes was studied by alternating current impedance method, and the structures of eutectic salts and solid polymer electrolytes were characterized by differential thermal analysis, infrared spectroscopy and X-ray diffractometry. The results show that the room temperature conductivity of LiClO₄-LiNO₃-LiBr eutectic salts reaches 3.11×10⁻⁴ S · cm⁻¹. The poly (lithium acrylate-acrylonitrile)/LiClO₄-LiNO₃-LiBr solid polymer electrolytes possess the highest room temperature conductivity at 70% LiClO₄-LiNO₃-LiBr eutectic salts content, and exhibit lower glass transition temperature of 75 °C compared with that of poly(lithium acrylate-acrylonitrile) of 105 °C. A complex may be formed in the solid polymer electrolytes from the differential thermal analysis and infrared spectroscopy analysis. X-ray diffraction results show that the poly(lithium acrylate-acrylonitrile) can suppress the crystallization of eutectic salts in this system.     

电致变色器件用聚合物电解质材料的研究进展

阐述了电致变色器件的工作原理、各层材料组成及其特点，着重讨论了聚合物电解质层的种类和其性能特点，评述了电致变色器件用聚合物电解质材料的最新研究进展，并展望了其应用前景和发展方向。