Cellulose polymer electrolyte membrane, and preparation method and application thereof

A technology of cellulose polymers and electrolyte membranes, which is applied in hybrid capacitor electrolytes, hybrid/electric double layer capacitor manufacturing, etc. It can solve the problems of reducing the electrochemical performance of all-solid-state SCs, insufficient flexibility of supercapacitors, and non-renewable electrolytes. , to achieve excellent electrochemical performance, outstanding cycle stability, and superior flexibility
CN107129592AActive Publication Date: 2017-09-05NORTHEAST FORESTRY UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NORTHEAST FORESTRY UNIVERSITY
Publication Date
2017-09-05

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Abstract

The invention provides a cellulose polymer electrolyte membrane, and a preparation method and application thereof. According to the invention, cellulose is used as a raw material, so the membrane has high porosity, electrolyte absorption performance and electrolyte retention performance due to reassembling of molecular structures of cellulose and a great amount of mesoporous structures among the molecular structures and is thus improved in ionic conductivity; and the membrane has good mechanical properties due to action of a great number of hydrogen bonds among the molecular chains of cellulose and formation of a three-dimensional homogeneous system. The cellulose polymer electrolyte membrane provided by the invention can be repeatedly folded, has good surface flexibility and transparency, abundant mesoporous structures and adjustable pore diameters; the pore diameters become larger and more uniform with prolongation of humidification time; the cellulose polymer electrolyte membrane porosity of 71.78%, ionic conductivity of 0.325 s / cm and good mechanical properties. As the cellulose polymer electrolyte membrane provided by the invention is applied to a flexible all-solid-state supercapacitor and a minisized supercapacitor, the membrane has good electrochemical performance and the prepared supercapacitors have scalability.
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Description

technical field

[0001] The invention relates to the technical field of electrolyte membranes, in particular to a cellulose polymer electrolyte membrane and its preparation method and application. Background technique

[0002] Polymer electrolytes are a novel application in flexible, portable and high-performance energy storage devices, such as supercapacitors, lithium-ion batteries (Li-ion), lithium-sulfur batteries (Li-S) and zinc-air batteries (Zn-O 2 ) and other non-liquid electrolyte materials in secondary batteries have dual functions of electrolyte and separator.

[0003] Polymer electrolyte membranes have attracted increasing attention due to their high ionic conductivity, wide electrochemical window, and safety in use. Polymer electrolyte membranes have dual functions of electrolyte and separator, facilitating the development of energy storage systems for portable and wearable electronic devices. So far, many efforts have been made by technicians to prepare high-pe...

Claims

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