Preparation of the polyelectrolyte complex hydrogel of biopolymers via a semi-dissolution acidification sol-gel transition method and its application in solid-state supercapacitors
文献类型： 外文期刊
作者： Zhao, Jian 1 ; Chen, Yu 1 ; Yao, Ying 1 ; Tong, Zong-Rui 1 ; Li, Pu-Wang 2 ; Yang, Zi-Ming 2 ; Jin, Shao-Hua 1 ;
作者机构： 1.Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China
2.Chinese Acad Trop Agr Sci, Agr Prod Proc Res Inst, Zhanjiang 524001, Peoples R China
关键词： Hydrogel; Chitosan; Sodium alginate; Polyelectrolyte complex; Solid-state supercapacitor
期刊名称：JOURNAL OF POWER SOURCES （ 影响因子：9.127； 五年影响因子：8.096 ）
ISSN： 0378-7753
年卷期： 2018 年 378 卷
页码：
收录情况： SCI
摘要： Hydrogels have drawn many attentions as the solid-state electrolytes in flexible solid-state supercapacitors (SCs) recently. Among them, the polyelectrolyte complex hydrogel (PECH) electrolytes of natural polymers are more competitive because of their environmentally friendly property and low cost. However, while mixing two biopolymer solutions with opposite charges, the strong electrostatic interactions between the cationic and anionic biopolymers may result in precipitates instead of hydrogels. Here we report a novel method, semi-dissolution acidification sol-gel transition (SD-A-SGT), for the preparation of the PECH of chitosan (CTS) and sodium alginate (SA), with the controllable sol-gel transition and uniform composition and successfully apply it as the hydrogel electrolyte of solid-state supercapacitors (SCs). The CTS-SA PECH exhibits an extremely high ionic conductivity of 0.051 S.cm(-1) and reasonable mechanical properties with a tensile strength of 0.29 MPa and elongation at break of 109.5%. The solid-state SC fabricated with the CTS-SA PECH and conventional polyaniline (PANT) nanowire electrodes provided a high specific capacitance of 234.6 F.g(-1) at 5 mV.s(-1) and exhibited excellent cycling stability with 95.3% capacitance retention after 1000 cycles. Our work may pave a novel avenue to the preparation of biodegradable PECHs of full natural polymers, and promote the development of environmentally friendly electronic devices.
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