Page 148 - 精细化工2019年第12期

第 36 卷第 12 期 精 细 化 工 Vol.36, No.12
2019 年 12 月 FINE CHEMICALS Dec. 2019

有机电化学与工业
荧光聚氨酯固态锂电池电解质的制备及性能

*
王 超，程 亮，鲍俊杰，黄毅萍 ，许戈文，熊潜生
（安徽大学 化学化工学院，安徽省绿色高分子重点实验室，水基高分子材料安徽省工程技术研究中心，安
徽 合肥 230601）

摘要：以聚碳酸酯二元醇（PCDL）和六亚甲基二异氰酸酯（HDI）为主要原料，1,4-丁二醇（BDO）和荧光小
分子二元醇 N,N-二羟乙基苯胺-β-三联吡啶（TPPDA）为扩链剂，制备了一种热塑性荧光聚氨酯，其与双三氟甲
烷磺酰亚胺锂（LiTFSI）共混制备了荧光聚氨酯电解质（FPU）。采用傅里叶变换红外光谱仪、荧光光谱仪、拉
伸测试仪、同步热分析仪、电化学工作站和电池测试仪对制备的电解质进行了结构、光学性能、力学性能、热
稳定性能和电化学性能的测试与分析。结果表明，随着膜内 LiTFSI 质量分数的增加，荧光强度增大；LiTFSI
–4
质量分数为 30%制备的荧光聚氨酯电解质膜（FPU-3）拉伸强度达到 4.5 MPa，电导率达到 1.03×10 S/cm；采
用LiTFSI质量分数为30%的荧光聚氨酯电解质膜与磷酸铁锂正极和锂金属负极组装的全固态电池表现出良好的
倍率与循环性能，在 80 ℃、0.2 C 和 1.0 C 倍率下首次放电比容量分别达到 164 和 112 mA·h/g。
关键词：荧光；聚氨酯；固态电解质；锂离子电池；有机电化学与工业
中图分类号：TM912；TQ317 文献标识码：A 文章编号：1003-5214 (2019) 12-2476-06

Preparation and Properties of Fluorescent Polyurethane
Solid-State Lithium Battery Electrolytes

*
WANG Chao, CHENG Liang, BAO Jun-jie, HUANG Yi-ping , XU Ge-wen, XIONG Qian-sheng
（School of Chemistry and Chemical Engineering, Key Laboratory of Environment-Friendly Polymer Materials of
Anhui Province, Anhui Province Engineering Technology Research Center of Water-Borne Polymer Materials, Anhui
University, Hefei 230601, Anhui, China）

Abstract: A fluorescent polyurethane was synthesized using polycarbonate diol (PCDL) and hexamethy
lenediisocyanate (HDI) as main raw materials, 1,4-butanediol (BDO) and N,N-dihydroxyethylaniline-
β-terpyridine (TPPDA) as chain extender. Then, the fluorescent polyurethane was mixed with lithium bis
[(trifluoromethyl) sulfonyl] azanide (LiTFSI) to obtain a series of fluorescent polyurethane-based
electrolytes (FPU). The structure, optical properties, mechanical properties, thermal stability and
electrochemical properties of the prepared electrolytes were tested and analyzed by Fourier transform
infrared spectrometer, fluorescence spectrometer, tensile tester, synchronous thermal analyzer,
electrochemical work station and battery tester. The results showed that the fluorescence intensity of
electrolyte increased with the increase of LiTFSI mass fraction. When the mass fraction of LiTFSI was 30%,
the prepared solid electrolyte (FPU-3) film possessed a tensile strength of 4.5 MPa with an ionic
–4
conductivity of 1.03×10 S/cm. An all-solid-state battery which was assembled with lithium iron phosphate
as cathode, lithium metal as anode and FPU-3 as solid state electrolyte membrane exhibited high rate
performance and good circulation performance. At 80 ℃, the specific discharge capacity of the battery
reached 164 mA·h/g at 0.2 C, while that reached 112 mA·h/g at 1.0 C.
Key words: fluorescence; polyurethane; solid-state electrolyte; lithium ion battery; electro-organic
chemistry and industry

收稿日期：2019-05-07; 定用日期：2019-06-21; DOI: 10.13550/j.jxhg.20190408
基金项目：安徽省自然科学基金（1808085QE173，1808085ME156）；安徽省高校科学研究项目（KJ2017A031，KJ2018ZD004）
作者简介：王 超（ 1994—），男，硕 士生 ， E-mail： 1354263112@qq.com。 联 系人： 黄毅萍（ 1966—），男 ， 教授，
E-mail： yphuang2001@sina.com。