Bioinspired strengthening and toughening of carbon nanotube@polyaniline/graphene film using electroactive biomass as glue for flexible supercapacitors with high rate performance and volumetric capacitance, and low-temperature tolerance. Issue 34 (23rd August 2021)

• Record Type: Journal Article
• Authors: Wu, Dan; Yu, Chuying; Zhong, Wenbin
• Is Part Of: Journal of materials chemistry. Volume 9:Issue 34(2021)
• Page Start: 18356
• Page End: 18368
• Publication Date: 2021-08-23
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d1ta05729d
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Electroactive biomass tannin was used to glue rGO and CNT@PANI which endows the CNT@PANI/rGO/TA film with high strength, toughness, and low-temperature energy storage performance. Abstract : Natural nacre built up with a brick-and-mortar architecture, exhibiting extraordinary strength and toughness, provides an inspiration to construct high-performance multifunctional films for flexible energy storage and portable electrical devices. In the present work, a nacre-mimetic graphene-based film (CNT@PANI/rGO/TA) is fabricated following this idea, wherein electroactive biomass tannin (TA) serves as glue, accompanied by the "mortar" polyaniline wrapped carbon nanotubes (CNT@PANI), to stick the reduced graphene oxide (rGO) "bricks" together. Benefiting from the thin layer of PANI on CNTs, the CNT@PANI nanowires intercalate into the rGO interlayers thus interlocking the nanosheets, and resulting in a well-defined porous multilayered structure. The obtained CNT@PANI/rGO/TA film exhibits both high mechanical strength (174.6 MPa) and toughness (9.17 MJ m −3 ). Meanwhile, the all-solid-state flexible supercapacitor assembled with CNT@PANI/rGO/TA demonstrates a high capacitance of 548.6 F cm −3 and an outstanding rate performance of 70.5% from 1 A g −1 to 50 A g −1 . Even at −40 °C, the specific capacitance of the supercapacitor is up to 454.9 F cm −3, approximately 83% of the capacitance delivered at room temperature. The strategy of using electroactive biomass as glue to construct a nacre-mimetic graphene-based film with high strength, toughness and energy storage performance is proved to be straightforward and effective.