碳基添加剂维度对聚合物电解质热电输运参数的影响
Influence of Dimensionality of Carbon-based Additives on Thermoelectric Transport Parameters in Polymer Electrolytes
AI总结：
本研究探讨碳基添加剂维度对含LiTFSI/NaTFSI盐的固态聚合物电解质热电性能的影响，发现添加剂维度和盐浓度显著调控Seebeck系数，钠基体系为可持续热电材料提供新方向。
摘要：
本文研究了含有双（三氟甲磺酰）亚胺锂（LiTFSI）和双（三氟甲磺酰）亚胺钠（NaTFSI）盐以及不同维度碳基添加剂的固态聚合物电解质（SPE）的热电性能。盐浓度的增加导致Seebeck系数升高，这是由于自由电荷载流子数量增加以及离子-离子和离子-聚合物相互作用产生的额外叠加效应。基于NaTFSI的电解质表现出负的Seebeck系数（高达 $S = -1.5\\,\mathrm{mV\\,K^{-1}}$），表明 $\mathrm{TFSI^-}$ 离子的迁移率占主导地位。准一维碳纳米管（CNTs）将Seebeck系数提高了3倍。平面二维石墨片（GF）适度增强Seebeck系数，影响 $\mathrm{Na^+}$ 和 $\mathrm{TFSI^-}$ 离子的迁移率以及电子电导率。 bulky三维炭黑（CB）添加剂诱导了独特的行为，Seebeck系数的符号随温度变化，这可能是由于与CB结构内 $\mathrm{TFSI^-}$ 离子的相互作用。活化能和Vogel温度随盐浓度的变化表明聚合物基质中发生了结构和机械改性。碳基添加剂的选择和盐浓度显著影响SPE的热电性能，为其在热电应用中的潜力提供了见解。基于钠的电解质成为锂基系统的有前景且可持续的替代品，符合可持续能源研究的需求。
英文摘要：
This paper investigates the thermoelectric properties of solid polymer electrolytes (SPE) containing lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) and sodium bis(trifluoromethanesulfonyl)imide (NaTFSI) salts, along with carbon-based additives of various dimensionalities. Increasing salt concentration leads to higher Seebeck coefficients as a result of the increasing number of free charge carriers and additional, superimposed effects by ion-ion and ion-polymer interactions. NaTFSI-based electrolytes exhibit negative Seebeck coefficients (up to $S = -1.5\,\mathrm{mV\,K^{-1}}$), indicating dominant mobility of $\mathrm{TFSI^-}$ ions. Quasi-one-dimensional carbon nanotubes (CNTs) increase the Seebeck coefficient by a factor of 3. Planar, two-dimensional graphite flakes (GF) moderately enhance it, affecting $\mathrm{Na^+}$ and $\mathrm{TFSI^-}$ ion mobilities and electronic conductivity. Bulky, three-dimensional carbon black (CB) additives induce a unique behavior where the sign of the Seebeck coefficient changes with temperature, presumably due to interaction with $\mathrm{TFSI^-}$ ions within the CB structure. Changes in activation energy and Vogel temperature with salt concentration suggest structural and mechanical modifications in the polymer matrix. The choice of carbon-based additives and salt concentration significantly influences the thermoelectric properties of SPEs thermoelectric properties, providing insights into their potential for thermoelectric applications. Sodium-based electrolytes emerge as promising, sustainable alternatives to lithium-based systems, aligning with sustainable energy research demands.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
