Carbon Neutralization最新文献

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.

The development of cathode materials with controllable physicochemical structures and explicit catalytic sites is important in rechargeable Zn–air batteries (ZABs). Covalent organic frameworks (COFs) have garnered increasing attention owing to their facile synthesis methods, ordered pore structure, and selectivity of functional groups. However, the sluggish kinetics of oxygen evolution reaction (OER) or oxygen reduction reaction (ORR) inhibit their practical applications in ZABs. Herein, nucleophilic substitution is adopted to synthesize pyridine bi-triazine covalent organic framework (denoted as O-COF), and meanwhile, ionothermal conversion synthesis is employed to load MO_x (M=Fe, Co) onto carbon nanosheet (named as FeCo@NC) to modulate the electronic structure. The Fe, Co-N codoped carbon material possesses a large portion of pyridinic N and M-N, high graphitization, and a larger BET surface area. An outstanding bifunctional activity has been exhibited in FeCo@NC, which provides a small voltage at 10 mA cm⁻² for OER (E₁₀ = 1.67 V) and a remarkable half-wave voltage for ORR (E_1/2 = 0.86 V). More impressively, when assembling ZABs, it displays notable rate performance, significant specific capacity (783.9 mAh g_Zn⁻¹), and satisfactory long-term endurance. This method of regulating covalent organic framework and ionothermal synthesis can be extended to design diverse catalysts.

Biomass-derived carbon as energy storage materials have gradually attracted widespread attention due to their low cost, sustainability, and inherent structural advantages. Herein, hard carbon (H-1200) and porous carbon (PC-800) for sodium-ion batteries (SIBs), sodium-ion capacitors (SICs) half cells and sodium-ion hybrid capacitors (SIHCs) have been synthesized from the same biomass precursor of Camellia shells through different treatments. H-1200 synthesized by directly high-temperature carbonization possesses a rational graphitic layer structure and plentiful heteroatoms. When applied as anode for SIBs, it exhibits a reversible capacity of 365.5 mAh g^–1 at 25 mA g^–1 and capacity retention 89.0% after 400 cycles at 200 mA g^–1. Additionally, PC-800 prepared by catalytic carbonization of K₂C₂O₄/CaC₂O₄ hybrid catalyst has a sophisticated porous structure and a high surface area of 2186.9 m² g^–1. When employed as a cathode for SICs, it delivers a maximum capacity 104.2 mAh g^–1 at 100 mA g^–1 and 35.0 mAh g^–1 at 5 A g^–1. Furthermore, the all carbon assembled SIHC (H-1200||PC-800) using H-1200 as anode and PC-800 as cathode, features a broad output voltage range (0.01 ~ 4.1 V), high energy density of 161.5 Wh kg^–1, power density of 12896.1 W kg^–1, and superior capacity retention of 90.32% after 10000 cycles at 10 A g^–1. This research result provide a new horizon for constructing low-cost and large-scale production of biomass derived carbon for energy storage materials.

The issues of health assessment and lifespan prediction have always been prominent challenges in the large-scale application of lithium-ion batteries (LIBs). This paper reviews the multiscale modeling techniques and their applications in battery health analysis, including atomic scale computational chemistry, particle scale reaction simulations, electrode scale structural models, macroscale electrochemical models, and data-driven models at the system level. Multiscale modeling offers a profound insight into material behavior and the aging process of batteries, thereby providing a valuable reference for both estimation and management strategies of battery state of health. To extend the battery lifespan, the utilization of artificial intelligence for material discovery and manufacturing process optimization, the implementation of end-cloud collaborative battery management systems, and the design of a multiscale simulation integration platform are considered. A management framework aimed at extending battery life is further proposed. This framework offers a promising roadmap for addressing health analysis challenges in LIBs, ultimately leading to more reliable, efficient, and durable solutions for next-generation batteries.