Carbon Neutralization最新文献

Two-dimensional (2D) semiconductors, such as monolayer MoS₂, has emerged as a profound material platform in the post-Moore era due to their versatile applications for high-performance transistors, memories, photodetectors, neuristors, and so on. Nevertheless, the inherent defects in these atomically thin materials have given rise to significant hysteresis in their field-effect transistors (FETs), resulting in shifted threshold voltages and elevated power consumptions not only on single-device levels but also at circuitry scales. We herein report that, by vertically integrating an in-plane ferroelectric, NbOCl₂, with monolayer MoS₂ FETs, the hysteresis in both the output and transfer curves of the latter can be greatly suppressed, which we attribute to compensated electromigration currents by the polarization currents of the 2D ferroelectric. This work opens a new avenue to hysteresis-free 2D transistors without necessitating defect-free channels, thus allowing for their use in high driving-voltage scenarios such as power electronics.

The high-value utilization of blast furnace slag (BFS) and steel slag (SS) as a valuable resource in the field of carbon reduction represents a green revolution, and also is an indispensable path toward breaking through resource and environmental constraints and achieving high-quality, sustainable development through solid waste utilization in the steel industry. Achieving resource recycling while harnessing the untapped latent energy of resources and exploring their carbon sequestration capabilities has become a crucial avenue for further valorization through waste utilization. BFS and SS discharged from iron-making or steel-making furnaces carry a significant amount of latent heat, especially the calcium oxide component in SS, which gives it a unique advantage in the field of comprehensive BFS and SS utilization and carbonation-based SS utilization. This article discusses the current research status of low-carbon-waste-heat utilization in the production of microcrystalline glass, cementitious materials, functional adsorbents, and other products through front-end modification of molten BFS and SS. This report also provides an overview of carbon capture by utilizing BFS and SS, offering insights into the research directions for subsequent heat recovery, online quality adjustment, high-value utilization, and carbon sequestration using BFS and SS in the steel industry.

The extensive consumption of chicken has resulted in the emergence of a significant environmental issue in the form of chicken feather waste. As such, there is an urgent need for the development of green treatment and recycling methods for chicken feathers. Chicken feathers can serve as a type of heteroatomic doping carbon source, making them an excellent candidate for the electrode materials used in electrochemical energy devices. Furthermore, their unique structures and functional groups make them highly promising for use as adsorbents, electronics, and building materials. In this paper, we provide a summary and review of recent progress made in the use of chicken feathers for energy and environmental applications. Based on the theoretical knowledge and practical applications presented in this review, promising green recycling processes of chicken feathers can be developed. These processes can help to reduce environmental pollution and promote sustainable development.

Anode-free rechargeable batteries (AFRBs), equipped with bare collectors at the anode, are potential electrochemical energy storage technology attributed to their simplified cell configuration, high energy density, and cost reduction. Nevertheless, issues including insufficient Coulombic efficiency as well as the formation of the dendrites restrict their practical implementation. In recent years, various strategies have been proposed to overcome the critical issues of AFRBs. Among which, interfacial properties play key roles for achieving high stable AFRBs. In this review, an overview of AFRBs is discussed in the first part. Then, the main strategies based on interfacial regulation engineering toward high-performance AFRBs are summarized including designing of current collectors, introducing of surface coating layers, modification of electrolytes, separators engineering, cathode materials regulation, and so forth. In addition, some future perspectives for developing AFRBs are proposed. This review will create new avenues on constructing stable AFRBs for advanced energy storage devices.

Carbon-based materials have been found to accelerate the sluggish kinetic reaction and are largely subject to the overall Zn-air batteries (ZABs) property, while their full catalytic mechanism is still not excavated because of the indistinct internal structure and immature in-situ technology. Up to now, systematic methods have been utilized to study and design promising high-performance carbon-based catalysts. To resolve the real active units and catalytic mechanism, developing molecular catalyst is a significant strategy. Herein, the review will initiate to briefly introduce the working principle and composition of ZABs. An important statement is correspondingly provided about the typical structure and catalytic mechanisms for the air cathode material. It also presents the tremendous endeavors on the catalytic performance and stability of carbon-based material. Furthermore, combined with theoretical calculation, the self-defined active sites are analyzed to understand the catalytic character, where the molecular catalyst is subsequently summarized and discussed through highlighting the unambiguous and controllable structure, in the hope of surfacing the optimum catalyst. Building on the fundamental understanding of carbon-based and molecular catalysts, this review is expected to provide guidance and direction toward designing future mechanistic studies and ORR electrocatalysts.

MXene materials have emerged as promising candidates for solving sustainable energy storage solutions due to their unique properties and versatility. MXene materials can not only be used directly as electrode materials but can also be used as functional materials to solve problems such as poor conductivity of electrode materials, severe volume expansion, dendrites, and dissolution of electrode materials. This perspective paper explores the potential applications of MXene materials for sustainable energy storage solutions, emphasizing their distinct characteristics and applications across various domains.

The cycling stability of O3-type NaNi_1/3Fe_1/3Mn_1/3O₂ (NFM) as a commercial cathode material for sodium ion batteries (SIBs) is still a challenge. In this study, the Ni/Fe/Mn elements are replaced successfully with tantalum (Ta) in the NFM lattice, which generated additional delocalized electrons and enhanced the binding ability between the transition metal and oxygen, resulting in suppressed lattice distortion during charging and discharging. This caused significant mitigation of voltage decay and improved cycle stability within the potential range of 2.0–4.2 V. The optimized Na(Ni_1/3Fe_1/3Mn_1/3)_0.97Ta_0.03O₂ sample achieved a reversible capacity of 162.6 mAh g⁻¹ at a current rate of 0.1 C and 73.2 mAh g⁻¹ at a high rate of 10 C. Additionally, the average charge/discharge potential retention reached 98% after 100 cycles, significantly mitigating the voltage decay. This work demonstrates a significant contribution towards the practical utilization of NFM cathodes in the SIBs energy storage field.

Front cover image: Nano-engineering, including morphology design, doping, defect, heterointerface, alloying, facet, and singleatom, which can effectively modulate the electronic structure and adsorption properties of intermediates, and greatly improve the catalytic performance of zinc-based materials. Moreover, the challenges and opportunities of zinc-based catalysts for CO₂RR are systematically discussed, increasing the possibility of practical application.

Inside front cover image: The cover illustrates the covalent organic frameworks (COFs) as advanced electrocatalysts for 2e^- oxygen reduction reaction (ORR). The cluster of fish in the lower left corner represents the abundant oxygens (O₂) everywhere. The big goldfishes in upper right corner represent the obtained high-value hydrogen peroxide (H₂O₂). The huge fishing net in the center represents the asprepared COFs with dangling and staggered-stacking aldehydes (-CHO) for the efficient capture of O₂ and conversion to H₂O₂. This -CHO adopt staggered stacking design provides larger space for mass transport, along with high selectivity and activity.

Back cover image: The cover image shows that Na₂S in situ infiltrated in activated carbon was used as a high-efficiency presodiation additive to supply sodium ions for sodium ion hybrid capacitors, thereby fabricating a high-energy density sodium ion hybrid capacitor. The presodiation mechanism is that Na₂S infiltrated in activated carbon is converted to S and provides active sodium ions for hard carbon anode during the charging process.