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• W4229014037 endingPage "136826" @default.
• W4229014037 startingPage "136826" @default.
• W4229014037 abstract "• A robust heterostructure is proposed by carbon quantum dot graft-functionalization. • Functional groups of carbon quantum dot form hydrogen bonds with amorphous WO 3 . • Structural stability for repetitive electrochemical reaction and bending of film. • Enhanced Li ion diffusivity and electron conductivity of flexible WO 3 film. • Novel strategy to fabricate stable and flexible electrochromic energy-storage device. The intrinsic structural instability of amorphous WO 3 (a-WO 3 ) following repeated Li ion insertion/extraction and bending hinders its application in stable and flexible electrochromic (EC) energy-storage devices. To resolve this problem, developing an elaborate heterostructure of a-WO 3 is essential for high-performance flexible EC energy-storage devices. Herein, a novel structure is proposed to introduce P-doped carbon quantum dots (P-CQDs) into a-WO 3 through a low-temperature process to induce robust chemical linkages with a-WO 3 . The functional groups of P-CQDs form strong hydrogen bonds with a-WO 3 in the form of quantum dot grafts, which effectively tolerate structural deformation following long, repetitive cycling electrochemical reactions and bending. Moreover, the functional groups and graphitic carbon of P-CQDs improve the Li ion wettability and electrical conductivity, respectively, thereby enhancing the electrochemical activity and kinetics. As a result of the impacts, P-CQD graft-functionalized a-WO 3 (P-CQD/a-WO 3 ) electrodes exhibit excellent EC energy-storage performances. Furthermore, a flexible EC energy-storage device fabricated with the P-CQD/a-WO 3 electrode exhibits a remarkably enhanced long-term cycle stability (transmittance retention of 87.3% after 4,000 cycles) and flexibility (transmittance retention of 84.1% and specific capacitance retention of 85.3% after 500 bending cycles). Therefore, we believe that the proposed heterostructure-inducing quantum dot graft functionalization with a-WO 3 is a breakthrough in the realization of high-performance flexible EC energy-storage devices." @default.
• W4229014037 created "2022-05-08" @default.
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• W4229014037 date "2022-10-01" @default.
• W4229014037 modified "2023-10-11" @default.
• W4229014037 title "P-doped carbon quantum dot graft-functionalized amorphous WO3 for stable and flexible electrochromic energy-storage devices" @default.
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• W4229014037 doi "https://doi.org/10.1016/j.cej.2022.136826" @default.
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