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Nanocellulose has emerged as a promising sustainable nanomaterial for constructing advanced electrochemical energy storage systems with renewability, lightweight, flexibility, high performance, and good safety. Here, we demonstrate a high-performance all-nanofiber asymmetric supercapacitor (ASC) using a forest-based, nanocellulose-derived hierarchical porous carbon (nanocellulose-carbon, HPC) anode, a mesoporous nanocellulose membrane separator (nanocellulose-separator) and a NiCo2O4 cathode with nanocellulose carbon as support matrix (nanocellulose-cathode, HPC/NiCo2O4). Nanocellulose-carbon possesses a three-dimensional (3D) porous structure comprised of interconnected nanofibers with an ultrahigh surface area of 2046 m2 g-1. When combined with the mesoporous structure of the nanocellulose membrane separator, these properties facilitate both the fast transport of ions and electrons even with thick (up to several hundreds of micrometres) and highly-loaded (up to 5.8 mg cm-2) ASC design. Consequently, the all-nanofiber ASC demonstrates a high electrochemical performance (64.83 F g-1 or 10.84 F cm-3 at 0.25 A g-1 and 32.78 F g-1 or 5.48 F cm-3 at 4 A g-1) that surpasses most cellulose-based ASCs ever reported. Moreover, the nanocellulose components promise renewability, low cost, and biodegradability, thereby representing a promising direction toward high-power, environmentally friendly, and renewable energy storage devices that are not limited to supercapacitors.
This article was published in the following journal.
Name: ACS applied materials & interfaces
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Performance of an act one or more times, with a view to its fixation or improvement; any performance of an act or behavior that leads to learning.
A personality trait characterized by a person's striving for flawlessness and setting excessively high performance standards, accompanied by overly critical self-evaluations and concerns regarding others' evaluations.
Carrying out of specific physical routines or procedures by one who is trained or skilled in physical activity. Performance is influenced by a combination of physiological, psychological, and socio-cultural factors.
A child or adolescent who, when compared to others of the same age or experience, exhibits capability of high performance in intellectual, creative, or artistic areas, possesses an unusual capacity for leadership or excels in specific academic fields. (From PL 100-297, Sec. 4103, Definitions)
A performance test based on forced MOTOR ACTIVITY on a rotating rod, usually by a rodent. Parameters include the riding time (seconds) or endurance. Test is used to evaluate balance and coordination of the subjects, particular in experimental animal models for neurological disorders and drug effects.