高性能壳聚糖基准固态离子热原电池构建及其热电性能研究  

Construction of High Performance Chitosan Based Solid State Ion Thermoelectric Battery and Thermoelectric Performance

作　　者：魏久洋 胡锦东 刘旸[1] 白龙[1] 李志国[1] Jiu-yang Wei;Jin-dong Hu;Yang Liu;Long Bai;Zhi-guo Li(Key Laboratory of Bio-based Material Science and Technology of Ministry of Education,Collegeof Materials Science and Engineering,Northeast Forestry University,Harbin 150040)

机构地区：[1]东北林业大学材料科学与工程学院、生物质材料科学与技术教育部重点实验室,哈尔滨150040

出　　处：《高分子学报》2023年第12期1911-1924,共14页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号32171695);黑龙江省自然科学基金(基金号C2018008)资助项目.

摘　　要：利用高分子基准固态离子热原电池将低品质热能转化为电能是提升能源综合利用的有效途径.以壳聚糖为基体,通过接枝双氰胺和胍盐离子,制备了兼具高离子电导率和高热功率的双胍盐壳聚糖-FeCl_(2/3)基离子型热电材料(CGH-G),并使材料的柔性和尺寸稳定性均有所增强.通过引入2种带正电荷的氨基离子,显著增强了离子热电材料的热扩散效应,使其热功率由2.16 mV/K提升至4.84 mV/K,同时显著降低了热电材料的阻抗.将所制备的壳聚糖基离子热电材料组装成准固态离子热原电池,在温差为25 K、外加5Ω负载的环境条件下,其功率密度达1.33 W/m^(2)的同时可实现25.43 kJ/m^(2)的高能量密度输出.此外,多个柔性离子热原电池串联后展现出较高的输出稳定性,显示出壳聚糖基离子热电材料在废弃能源利用方面的广阔应用前景.The application of polymer based solid-state ion thermoelectric batteries to convert low-quality heat energy into electrical energy is an effective way to improve energy comprehensive utilization.Using chitosan as the matrix,a high ion conductivity and high thermal power based ion thermoelectric material(CGH-G)was prepared by grafting dicyandiamide and guanidine ions,which enhances the flexibility and dimensional stability of the material.Due to the introduction of two positively charged amino ions,the thermal diffusion effect of ion pairs is significantly enhanced,while the thermal work rate of the material is increased from 2.16 mV/K to 4.84 mV/K,and the impedance of the thermoelectric material is significantly reduced.The prepared chitosan based ion thermoelectric material is assembled into a quasi-solid-state ion thermoelectric cell.Under the environmental conditions of a temperature difference of 25 K and an external 5Ω load,the power density can reach 1.33 W/m^(2) while achieving a high energy density output of 25.43 kJ/m^(2).In addition,multiple flexible ion thermoelectric batteries connected in series exhibit high output stability,demonstrating the broad application prospects of chitosan-based ion thermoelectric materials in waste energy utilization.

关 键 词：壳聚糖 准固态离子热电材料 离子热原电池 功率密度 能量密度 

分 类 号：TB34[一般工业技术—材料科学与工程] TM915[电气工程—电力电子与电力传动]