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第 36 卷第 5 期 精 细 化 工 Vol.36, No.5
201 9 年 5 月 FINE CHEMICALS May 2019

有机电化学与工业
固态锂离子电池用聚碳酸酯型聚氨酯粘结剂

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王 超，姜时锋，郭晓艳，鲍俊杰，黄毅萍 ，许戈文
（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）、4,4-二环己基甲烷二异氰酸酯（HMDI）为主要原料，制备了聚碳酸酯型
聚氨酯（PCPU）。用傅里叶变换红外光谱仪、拉伸测试仪、同步热分析仪对合成的聚氨酯进行了结构、力学、
热稳定性能表征，并对组装的电池进行了窗口、倍率、交流阻抗和循环性能测试。与传统聚偏氟乙烯（PVDF）
粘结剂相比，PCPU 粘结剂制备的正极片剥离强度更高，达到 0.21 N/cm；组装的钢片（SS）/PCPU/Li 半电池在
2.0~4.5 V 内未发生明显氧化分解；当正极材料 m(LiFePO 4 )∶m(导电炭黑，SP)∶m(PCPU)=60∶20∶20 时制作的
电池性能最好，剥离强度达到 0.32 N/cm，在 60 ℃、1.0 C 电流密度下，该正极片组装的电池放电比容量达到
143 mA·h/g，0.2 C 电流密度下循环 50 次容量保持率达到 97.35%。
关键词：聚碳酸酯；聚氨酯；粘结剂；全固态锂离子电池；有机电化学与工业
中图分类号：O631 文献标识码：A 文章编号：1003-5214 (2019) 05-0957-06

Polycarbonate Polyurethane Binder for Solid State Lithium Ion Battery

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WANG Chao, JIANG Shi-feng, GUO Xiao-yan, BAO Jun-jie, HUANG Yi-ping , XU Ge-wen
（School of Chemistry and Chemical Engineering, Anhui University; 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: Polycarbonate-based polyurethane(PCPU) was prepared using polycarbonate (PCDL) and 4,4-
dicyclohexylmethane diisocyanate (HMDI) as raw materials. Fourier transform infrared spectroscopy
(FTIR), tensile tester and simultaneous thermal analyzer were used to characterize the structure, mechanical
properties, and thermal stability of the synthesized PCPU. The electrochemical stability window, rate
performance, ac impedance, and cycling performance of the assembled cells were tested. Compared with
the traditional PVDF binder, the peel strength of the electrode prepared by PCPU binder is higher, which
was 0.21 N/cm. The assembled sheet steel (SS)/PCPU/Li half cell did not undergo obvious electrochemical
oxidation decomposition within the 2.0 to 4.5 V range. The battery fabricated by the cathode consisting of
m(LiFePO 4) : m(conductive carbon black, denoted as SP)∶m(PCPU)=60∶20∶20 showed the best
comprehensive performance with a peel strength of 0.32 N/cm. At 60 ℃, the discharge specific capacity
reached 143 mA·h/g at 1.0 C,and the capacity retention reached 97.35 % after 50 cycles at 0.2 C.
Key words: polycarbonate; polyurethane; binder; solid-state lithium-ion battery; organic electro-chemistry
and industry
Foundation items: Natural Science Foundation of Anhui Province(1808085QE173, 1808085ME156); Scientific
Research Foundation of the Higher Education Institutions of Anhui Province(KJ2017A031, KJ2018ZD004)

随着人们安全意识的提高，固态锂离子电池近 力的电化学储能装置 [1-2] 。粘结剂作为锂离子电池中
年来得到广泛研究和发展。固态锂电池具有能量密 非活性物质，对电池的电化学性能有很大影响。理
度高、安全性和机械性能好等优点，已成为最具潜 想的固态锂离子电池粘结剂应兼具较好的力学强

收稿日期：2018-10-12; 定用日期：2019-01-15; DOI: 10.13550/j.jxhg.20180750
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。联系人：黄毅萍（1966—），男，教授，E-mail：yphuang2001@sina.com。