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Sustainable conversion of wastes into eco-friendly wearable energy storage materials is of uppermost priority when facing the rapid development of human society. Although some attempts have successfully developed wastes into activated carbon electrodes, the high energy consumption of the production process and the powder form greatly restrict their application in eco-friendly wearable supercapacitors. Here, industrial waste-flax noil was conversed into fiber-shaped supercapacitors (FSSCs) via wet spinning and in situ deposition of polypyrrole (PPy). The regenerated cellulose fibers (RCFs) collected from the ethyl alcohol coagulation bath possessed excellent tensile behaviors and multi-groove surfaces, encouraging the subsequent textile processing and ions activities. After PPy deposition, the obtained fiber electrodes yielded high specific capacitance (510.7 F g-1 at 0.5 A g-1) and excellent coulombic efficiency (99.3% at 10 A g-1). More importantly, the assembled FSSCs delivered remarkable electrochemical performances and could power the LED. The green strategy proposed in this work provides a new consideration for converting wastes into practical eco-friendly wearable devices. [Display omitted] • Flax noil was successfully converted into eco-friendly fiber supercapacitors. • ETf@PPy12 electrodes possessed high specific capacitance and coulombic efficiency. • The assembled flexible supercapacitor showed superior electrochemical performance. • The devices in series could power the LED. [ABSTRACT FROM AUTHOR]

Green finance development, which enhances innovation capacity and economic green transformation, helps people deal with the challenges of climate change, ecological crisis and energy security. It is important to achieve sustainable and balanced development for green finance. In this paper, an evolutionary game model is built with four participants, which include governments, financial institutions, enterprises, and consumers. Analogue simulation is applied to analyze the influences of each parameter on changes and development in green financial market. Equilibrium strategy and influence mechanism of participating entities are investigated. The result shows that: first, the integrity of the green financial system has a positive impact on sustainability developments and cleaner production. Second, it is critical to strengthen the government regulation, slash financial institutions and enterprises' green finance production cost, increase the compensation for consumer pollution, and reduce the supervision cost of government. Accordingly, to integrity green financial system, governments, financial institutions, enterprises, and consumers needs participation and cooperation among each other. Image 1 • Evolutionary game model was established, and it was used to analyze and simulate green finance sustainability based on multi-agent.. • Green finance, together with consumers' strong environmental protection preferences leads to a more comprehensive development of green financial market.. • Increasing benefits promote green sustainability, but more cost will lead to negative effects.. • The influence of four participants on evolution was analyzed. [ABSTRACT FROM AUTHOR]

Two kinds of small molecular dyads (SMDs) based on trithiophene-benzodithiophene-rhodanine (DR3TBDT) main backbone and PBI termini, named SMD2-C6 and SMD2-C12, were designed with different lengths of alkyl linkers (C 6 H 12 and C 12 H 24). The length effect of alkyl linkers on the photovoltaic performance of the two SMDs have been systematically studied. The results show that the length of alkyl linkers can simutaneously tune the energy levels and phase separation in molecular dyad thin films. As a result, a power conversion efficiency of 1.33% was obtained for SMD2-C12 based single-component organic solar cells (SCOSCs), showing higher open-circuit voltage, short-circuit current density, and fill factor than those of SMD2-C6 based devices. Our findings provide a strategy for designing new SMDs and reveal the importance of alkyl linkers' length on the morphology of SMDs toward improved SCOSC performance. Small molecular dyads based on DR3TBDT backbone and PBI end groups with varying alkyl linker lengths have been developed for application in single-component organic solar cells. [Display omitted] • Two molecular dyads based on a donor backbone and perylene bisimides end groups were developed. • Different alkyl linkers as C 6 H 12 and C 12 H 24 were introduced. • Longer alkyl linkers were found to improve the nanophase separation and provided higher efficiency in single-component organic solar cells. [ABSTRACT FROM AUTHOR]