Facile and Reliable in Situ Polymerization of Poly(Ethyl Cyanoacrylate)-Based Polymer Electrolytes toward Flexible Lithium Batteries

Yanyan Cui; Jingchao Chai; Huiping Du; Yulong Duan; Guangwen Xie; Zhihong Liu; Guanglei Cui

doi:10.1021/acsami.6b16218

Facile and Reliable in Situ Polymerization of Poly(Ethyl Cyanoacrylate)-Based Polymer Electrolytes toward Flexible Lithium Batteries

ACS Appl Mater Interfaces. 2017 Mar 15;9(10):8737-8741. doi: 10.1021/acsami.6b16218. Epub 2017 Mar 3.

Authors

Yanyan Cui^{1

2}, Jingchao Chai^{2

3}, Huiping Du^{2

3}, Yulong Duan^{2

3}, Guangwen Xie¹, Zhihong Liu^{2

3}, Guanglei Cui^{2

3}

Affiliations

¹ Key Laboratory of Nanomaterials, Qingdao University of Science and Technology , No. 53 Zhengzhou Road, Qingdao 266042, People's Republic of China.
² Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao 266101, People's Republic of China.
³ University of Chinese Academy of Sciences , No. 19A Yuquan Road, 100049, Beijing, China.

PMID: 28231428
DOI: 10.1021/acsami.6b16218

Abstract

Polycyanoacrylate is a very promising matrix for polymer electrolyte, which possesses advantages of strong binding and high electrochemical stability owing to the functional nitrile groups. Herein, a facile and reliable in situ polymerization strategy of poly(ethyl cyanoacrylate) (PECA) based gel polymer electrolytes (GPE) via a high efficient anionic polymerization was introduced consisting of PECA and 4 M LiClO₄ in carbonate solvents. The in situ polymerized PECA gel polymer electrolyte achieved an excellent ionic conductivity (2.7 × 10^-3 S cm^-1) at room temperature, and exhibited a considerable electrochemical stability window up to 4.8 V vs Li/Li⁺. The LiFePO₄/PECA-GPE/Li and LiNi_1.5Mn_0.5O₄/PECA-GPE/Li batteries using this in-situ-polymerized GPE delivered stable charge/discharge profiles, considerable rate capability, and excellent cycling performance. These results demonstrated this reliable in situ polymerization process is a very promising strategy to prepare high performance polymer electrolytes for flexible thin-film batteries, micropower lithium batteries, and deformable lithium batteries for special purpose.

Keywords: Li-ion battery; flexible; in situ polymerization; poly(ethyl cyanoacrylate); polymer electrolytes.