膨润土对干电池溶液中重金属离子的吸附作用

膨润土对干电池溶液中重金属离子的吸附作用蒋引珊，董振亮，张雨力（长春地质学院应用化学系长春１３００２６）关键词膨润土，蒙脱石，电池溶液，重金属离子，吸附由于膨润土中主要矿物蒙脱石特殊的层状结构和离子导电性、凝胶性，充当电池糊层材料既节省粮食又降低成本...     

主链玻璃化转变区在室温附近的梳形聚合物电解质

主链玻璃化转变区在室温附近的梳形聚合物电解质＊齐力林云青夏永姚王佛松（中国科学院长春应用化学研究所长春１３００２２）关键词梳状高分子，固体电解质，离子导电性，玻璃化转变，分子运动＊１９９４－１０－３０收稿；１９９５－１２－１０修稿７３２高分子固体电解...     

SrCeO3的微波合成及离子导电性质研究

ＳｒＣｅＯ_３的微波合成及离子导电性质研究徐秀廷，崔得良，冯守华，徐如人（吉林大学无机水热合成开放研究实验室，长春，１３００２３）关键词ＳｒＣｅＯ_３，微波合成，离子电导在复合氧化物中，ＳｒＣｅＯ３由于具有电子和离子混合导电性质而成为潜在的电极材料。另...     

Na_（1．0）Zn_（1．62）Si_（1．38）O_（4．84）·0．6H_

Ｎａ_（１．０）Ｚｎ_（１．６２）Ｓｉ_（１．３８）Ｏ_（４．８４）·０．６Ｈ_２Ｏ的水热合成及离子导电性质崔得良，傅戈妍，庞广生，徐秀廷，冯守华，徐如人（吉林大学无机水热合成开放研究实验室，长春，１３００２３，内蒙古民族师范学院化学系）关键词水热合成，...     

Na2ZnSiO4的中温水热合成和离子导电性质研究

Ｎａ_２ＺｎＳｉＯ_４的中温水热合成和离子导电性质研究崔得良，傅戈妍，庞广生，徐秀廷，冯守华，徐如人（吉林大学无机水热合成开放研究实验室，长春，１３００２３）关键词水热合成，硅酸锌钠，离子导体在硅酸盐中，人们已得到了如特种玻璃［１］、微孔晶体［２］“及...     

有机锡化合物的光电子能谱（XPS）研究（Ⅰ）

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不同分子量尼龙1010的结晶与熔融

不同分子量尼龙１０１０的结晶与熔融＊朱诚身王经武王友文杨桂萍（郑州大学材料工程系郑州４５００５２）陈玉莫志深（东北师范大学分析测试中心长春１３００２４）（中国科学院长春应用化学研究所长春１３００２２）关键词尼龙１０１０，分子量，结晶，熔融＊１９９４＿...     

丙烯酸丁酯－苯乙烯－丙烯腈共聚物的结构与力学性能

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稀土双(11-钨硅酸)钾的质子导电性研究(英)

研究了K13［Ln（SiW11O39）2］nH2O（Ln=La，Ce，Pr，Nd，Sm，Gd）的质子导电性研究表明其导电性不仅与物质本性有关，也与外界条件如温度、频率等有关，不同结构的杂多化合物给出不同结构的质子导电性．总结了质子导电性随温度、结晶水数目、频率的变化总趋势．基于实验数据得出一些重要结论，所得数据未见文献报道．     

Dawson结构钨铌磷杂多配合物183WNMR谱的研究

Ｄａｗｓｏｎ结构钨铌磷杂多配合物~（１８３）ＷＮＭＲ谱的研究龚剑，瞿伦玉，陈亚光，李宝利（东北师范大学化学系，长春１３００２４）张建国（中国科学院长春应用化学研究所，长春１３００２２）关键词：Ｄａｗｓｏｎ结构杂多配合物，钨铌磷杂多配合物，~（１８３）Ｗ...     

一种新型固体电解质的导电性的研究

对多种新型Ｌｉ离子导电的ｐｏｌｙｍｅｒ－ｉｎ－ｓａｌｔ固体电解质的导电性及其影响因素进行了研究。这种固体电解质是将很少量的单离子聚合物电解质－聚丙烯酸锂熔于低温共熔锂盐中得到的,室温电导率为１０＾－５Ｓ／ｃｍ（２９℃）,较由聚氧化乙烯（ＰＥＯ）制造的ｐｏｌｙｍｅｒ－ｉｎ－ｓａｌｔ固体电解质,电导率有明显地提高。     

高分子固体电解质LiNO_3-LiOOCCH_3/聚丙烯酸锂的合成与性能研究

以丙烯酸和氢氧化锂为原料用反相乳液聚合法合成聚丙烯酸锂 (PAALi) ,将其熔于低共熔盐 (一定比例的LiNO3 LiOOCCH3混合物 )中得到新型高分子固体电解质 (SPE) ,用XRD、IR、DTA、TG DTG等技术进行了表征 ,讨论了影响合成PAALi工艺及新型固体电解质电阻率的主要因素 ,在LiNO3 LiOOCCH3摩尔比为 1∶1时 ,将其按质量百分比 80∶2 0与聚丙烯酸锂混合均匀并熔融 ,得到的电解质其室温离子电导率可达 2× 10 - 5S·cm- 1 ,大量低共熔盐的加入可明显提高SPE的离子导电率 .XRD、DTA及TG DTG结果表明低共熔盐与聚丙烯酸锂形成了新的配合物     

Influence of thermal history and humidity on the ionic conductivity of nanoparticle‐filled solid polymer electrolytes

The crystallinity and conductivity of nanoparticle‐filled solid polymer electrolytes (SPEs) are investigated as a function of thermal history and water content. Our objective is to evaluate how performance is affected by the conditions under which the SPEs are handled and tested. The samples consist of polyethylene oxide (PEO), LiClO₄, and Al₂O₃ nanoparticles. At low humidity, SPEs at ether oxygen to lithium ratios of 8:1 do not crystallize immediately; instead, 3 days are required for crystallization to occur, and this does not depend strongly on the presence of nanoparticles. The conductivity is improved by the addition of nanoparticles at low humidity, but only at an ether oxygen to lithium ratio of 10:1, which corresponds to the eutectic concentration. At high humidity, the recrystallization time is delayed for 3 weeks, and the conductivity increases in both filled and unfilled SPEs beyond that of the low humidity samples. Although we observe that water amplifies the influence of nanoparticles on conductivity, we also find that nanoparticles inhibit water uptake—but only in the presence of lithium. Because Li⁺ strongly absorbs water, this result suggests that nanoparticles may interact directly with Li⁺ ions to prevent water uptake. In filled samples at the eutectic concentration (10:1), more water is absorbed compared to the nanoparticle‐filled 8:1 samples, even though less lithium is present. This suggests that nanoparticles may segregate to lithium‐poor regions in the 10:1 samples, and this scenario is supported by the morphology that would be expected at the eutectic concentration. © 2011 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 49: 1496–1505, 2011     

一种新型聚合物固体电解质的导电性的研究

自从１９７５年Ｗｒｉｇｈｔ等［１］首次发现了ＰＥＯ 碱金属盐络合物的离子导电性后，人们对不同类型的聚合物固体电解质进行了深入的研究，其中最成功的是玻璃化温度Ｔｇ较低、盐浓度适中的“ｓａｌｔ ｉｎ ｐｏｌｙｍｅｒ”固体电解质［２，３］，但在没有其它小分...     

Transport Properties and Phase Behaviour in Binary and Ternary Ionic Liquid Electrolyte Systems of Interest in Lithium Batteries

A binary ionic liquid (IL) system based on a common cation, N‐methyl‐N‐propylpyrrolidinium (C₃mpyr⁺), and either bis(trifluoromethanesulfonyl)imide (NTf₂^?) or bis(fluorosulfonyl) imide (FSI^?) as the anion is explored over its entire composition range. Phase behavior, determined by DSC, shows the presence of a eutectic temperature at 247 K and composition around an anion ratio of 2:1 (FSI^?:NTf₂^?) with the phase diagram for this system proposed (under the thermal conditions used). Importantly for electrochemical devices, the single phase melting transition at the eutectic is well below ambient temperatures (247 K). To investigate the effect of such anion mixing on the lithium ion speciation, conductivity and PFG–NMR diffusion measurements were performed in both the binary IL system as well as the Li‐NTf₂‐containing ternary system. The addition of the lithium salt to the mixed IL system resulted in a decrease in conductivity, as is commonly observed in the single‐component IL systems. For a fixed lithium salt composition, both conductivity and ion diffusion have linear behaviour as a function of the anion ratio, however, the rate of change of the diffusion coefficient seems greater in the presence of lithium. From the application point of view, the addition of the FSI^? to the NTf₂^? IL results in a considerable increase in lithium ion diffusivity at room temperature and no evidence of additional complex ion behaviour.     

Spectroscopic and DFT studies to understand the liquid formation mechanism in the LiTFSI/acetamide complex system

It is interesting that although both lithium bis(trifluoromethane sulfone) imide (LiN(SO2CF3)2, LiTFSI) and acetamide (CH3CONH2) are solid, their mixture is a liquid in an appropriate molar ratio range at room temperature. The liquid formation mechanism of the LiTFSI/acetamide complex has been investigated by FT-IR and FT-Raman spectroscopy. The spectroscopic studies show that the Li+ ions coordinate with the C=O group of acetamide whereas the SO2 group in TFSI- anions interacts with the NH2 group of acetamide via hydrogen bonding. These interactions lead to the breakage of the hydrogen bonds between acetamide molecules and to the dissociation of LiTFSI, resulting in the formation of this molten salt. Furthermore, it has been found that moderate interaction between LiX and RCONH2 (R = -NH2, -CH3 and -CF3) is favorable for forming a LiX/RCONH2 molten salt system with low eutectic temperature and high conductivity based on density functional theory (DFT) calculational and experimental comparison for different R groups in RCONH2 and different lithium salts.     

聚电解质电性能的研究

用PJ-356型动电容静电计直流法,测定了一系列不同固体聚电解质的电导率,其电导率一般在10^-8到10^-12(欧姆·厘米)^-1范围.阐明了分子量不同、温度不同、聚甲基丙烯酸锂、钠、钾离子半径不同及聚电解质侧链长短不同对电导率的影响.     

Aluminium-doped LiFePO4 single crystals. Part II. Ionic conductivity, diffusivity and defect model

We report on lithium ion conductivity and diffusivity along major crystallographic directions of Al-doped LiFePO4 single crystals. Impedance spectroscopy as well as galvanostatic polarization measurements have been carried out on the electronically blocking symmetric cell LiAl/LiI/LiFe(Al)PO4/LiI/LiAl. Neither ionic conductivity nor lithium diffusivity show anisotropy in the bc planes within the experimental error, but much lower values in the a-direction. Similar features were observed earlier by us for the pure single-crystal and the Si-doped single crystal. On Al-doping the ionic conductivity has increased while the electronic conductivity has decreased compared to undoped LiFePO4. Not only this donor doping effect but also the temperature dependence of ionic conductivity and of lithium-diffusivity are successfully interpreted in terms of lithium vacancies, holes and associates in the framework of a detailed defect chemical analysis. Ion-electron as well as ion-ion associates play a significant role in this system.     

SINGLE IONIC CONDUCTI0N OF POLYSILOXANE CONTAINING PROPYLENE CARBONATE GROUP AND LITHIUM POLYMERIC SALTS

The polysiloxane containing propylene carbonate side group and several lithium poly-meric salts were synthesized. The structure were confirmed by IR, NMR and XPS. Theblending systems of polysiloxane containing propylene carbonate group with different lithiumpolymeric salts were studied by ion conductivity XPS and DSC. Different lithium poly-meric salts in the blending system lead to conductivity arranged in the following sequence:poly(lithium ethylenebenzene sulfonate methylsiloxane)>poly(lithium propionate methyl-siloxane)>poly(lithium propylsulfonate methylsiloxane)>poly(lithium styrenesulfonate).In the blending system the best single ion conductivity was close to 10~(-5) Scm~(-1) at roomtemperature. XPS showed that at low lithium salt concentration the conductivity increasedwith the increasing content of lithium salt, in consequence of the increase of free ion andsolvent separated ion pair. At high lithium salt concentration the free ion was absent andthe solvent-separated ion pair functioned as carrier.     

SINGLE-ION CONDUCTIVITY IN POLY (LITHIUM PROPIONATE METHYL SILOXANE)

Poly(lithium propionate methyl siloxane )as a single-ion carrier source was synthesized. The crosslinked film showed lower lithium ionic conductivity at room temperature (about 10~(-10) S/cm). However,the lithium ionic conductivity was obviously increased by blending with high polar polymers such as polyethylene oxide, poly (methylsiloxane - co- ethylene oxide) and poly (methylsiloxane- g- ethylene oxide). In the blend system a high conductivity of 10~(-7)-10~(-5) Scm~(-1) at room temperature was obtained and the single-ion conductivity was deeply influenced by the content of the poly (lithium propionate methyl siioxane). The dc ionic conductivity of the flexible crosslinked films is more stable over time.