Influence of silver ion reduction on electrical modulus parameters of solid polymer electrolyte based on chitosan-silver triflate electrolyte membrane
Influence of silver ion reduction on electrical modulus parameters of solid polymer electrolyte based on chitosan-silver triflate electrolyte membrane
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DOI：
10.3144/expresspolymlett.2010.38
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发表时间：
2010-05-01
影响因子：
3.3
通讯作者：
Arof, A. K.
中科院分区：
文献类型：
--
作者：
Aziz, S. B.;Abidin, Z. H. Z.;Arof, A. K.
用交流阻抗法研究了壳聚糖：AgCF（3）SO（3）固体聚合物电解质在303 ~ 393 K范围内的电模量特性。M "峰随频率的移动取决于离子的离解和缔合。对于具有最高电导率的样品，发现最低的电导率弛豫时间τ（σ）。电模量的真实的部分表明该材料是高电容性的。电模量虚部M“的非对称峰预示着非德拜型弛豫。弛豫时间的分布由变形的Argand图的圆弧形式表示。358 K以上M'和M“值的增加可以归因于银离子向银纳米颗粒的转化。复阻抗谱和紫外-可见吸收光谱表明了银纳米粒子在壳聚糖-三氟甲磺酸银固体电解质中的温度依赖性。通过透射电子显微镜（TEM）证实了银纳米颗粒的形成。M "谱的标度行为表明，动力学弛豫过程与温度无关。β指数值表明电导率弛豫是高度非指数的。
The electric modulus properties of solid polymer electrolyte based on chitosan: AgCF(3)SO(3) from 303 to 393 K have been investigated by using impedance spectroscopy. The shift of the M '' peak spectra with frequeny depends on the dissociation and association of ions. The lowest conductivity relaxation time tau(sigma), was found for the sample with the highest conductivity. The real part of electrical modulus shows that the material is highly capacitive. The asymmetric peak of the imaginary part of electric modulus M '', predicts a non Debye type relaxation. The distribution of relaxation times was indicated by a deformed arc form of Argand plot. The increase of M' and M '' values above 358 K can be attributed to the transformation of silver ions to silver nanoparticles. The complex impedance plots and ultraviolet-visible (UV-vis) absorption spectroscopy indicate the temperature dependent of silver nanoparticles in chitosan-silver triflate solid electrolyte. The formation of silver nanoparticles was confirmed by transmission electron microscopy (TEM). The scaling behavior of M '' spectra shows that the dynamical relaxation processes is temperature independent for aparticular composition. The beta exponent value indicate that the conductivity relaxation is highly non exponential.