Highly Efficient and Stable Cellulose-Based Ion Gel Polymer Electrolyte for Solid-State Supercapacitors

电解质 材料科学 化学工程 离子电导率 石墨烯 纤维素 乙烯醇 纳米颗粒 超级电容器 聚合物 电极 纳米技术 化学 复合材料 电化学 物理化学 工程类
作者
Moshuqi Zhu,Lubing Yu,Shuaishuai He,Huachi Hong,Jian Liu,Lihui Gan,Minnan Long
出处
期刊:ACS applied energy materials [American Chemical Society]
卷期号:2 (8): 5992-6001 被引量:36
标识
DOI:10.1021/acsaem.9b01109
摘要

To solve the current situation of low efficiency and instability of SCs, herein, the regenerated cellulose nanoparticles are applied on the electrolyte for the first time and a kind of solid-state SC with high performance is synthesized in a facile way. The electrolyte is prepared taking copolymer poly(vinyl alcohol) (PVA) as the polymer matrix, 1-butyl-3-methylimidazolium trifluoromethansulfonate (BmimCF3SO3) as the supporting electrolyte, graphene oxide as the ionic conducting promoter, and regenerated cellulose nanoparticles as the regulator. This doped ion gel significantly improves the charge-transfer resistance, because the homogeneously distributed regenerated cellulose nanoparticles make the ion transmission more orderly and stable and then reduce charge transfer resistance greatly. A model of the transmission of ions in the novel electrolyte is proposed. The cellulose-based gel electrolyte enables the SC to show good capacity retention of about 80%, and its charge/discharge efficiency maintains at 98% after 10,000 cycles. Those satisfactory performances are due to the high ionic conductivity, excellent compatibility with carbon electrodes and long-term stability of the doped ion gel. Attributed to the simple procedure and its components, the gel electrolyte is highly scalable, cost-effective, safe, and nontoxic as well as has application potential in various energy storage and delivery systems.
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