聚电解质
超级电容器
生物高聚物
化学工程
离子电导率
壳聚糖
电解质
准固态
阳离子聚合
自愈水凝胶
纳米技术
聚合物
化学
溶解
材料科学
高分子化学
复合材料
电容
电极
工程类
物理化学
色素敏化染料
作者
Jian Zhao,Yu Chen,Ying Yao,Zongrui Tong,Puwang Li,Ziming Yang,Shaohua Jin
标识
DOI:10.1016/j.jpowsour.2018.01.005
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 (PANI) 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.
科研通智能强力驱动
Strongly Powered by AbleSci AI