Advanced Sustainable Systems最新文献

H₂O₂'s utility derives from its strong oxidizing properties and eco-friendliness, rendering it widely used. The conventional anthraquinone process is the primary industrial production method, but plagued by drawbacks: complex by-products, high energy consumption, and substantial transportation logistics costs. New alternatives are imperative, with electrocatalytic H₂O₂ synthesis-a promising option-involving O₂ reduction to H₂O₂ via 2e⁻ORR and H₂O oxidation to H₂O₂ via 2e⁻WOR. Currently, there have been varying degrees of research progress on the two pathways. This review comprehensively summarizes the latest progress of two different pathways used for electrocatalytic synthesis of H₂O₂. First, the reaction mechanisms of ORR and WOR were introduced, and the factors affecting production efficiency were analyzed from the perspective of thermodynamics. Next, different types of catalysts used in electrocatalysis were discussed, and strategies for improving their activity and H₂O₂ selectivity were outlined. Subsequently, the applications of the two electrochemical pathways for H₂O₂ production in reactors were introduced, focusing particularly on the breakthrough achieved by coupling 2e⁻ORR and 2e⁻WOR in a single system. This review concluded with an analysis of the hurdles in efficient H₂O₂ electrosynthesis, in addition to the promising opportunity of achieving full production through a dual-electrode approach.

This study presents a green and sustainable electrolyte derived from flaxseeds (FS) aimed at enhancing the electrochemical stability of zinc-ion batteries (ZIBs), thereby reducing the occurrence of free water molecules and alleviating the hydrogen evolution reaction (HER) that contributes to the development of zinc (Zn) dendrites. The abundant hydroxyl groups present in polysaccharides and phenolic compounds within the flaxseeds coordinate with Zn²⁺, modifying the solvation sheath and reducing HER activity. Zn//Zn symmetric cells utilizing the FS-based electrolyte exhibited remarkably stable cycling for 3000 h at a current density of 1.0 mA cm⁻² (1.0 mAh cm⁻²) and 2500 h at 2.0 mA cm⁻² (2.0 mAh cm⁻²). Zn//V₂O₅ full cells delivered a discharge capacity of 233.8 mAh g⁻¹ at 0.2 A g⁻¹ and excellent rate capability across a wide current density range of 0.2–10 A g⁻¹. The ex situ SEM and XRD results confirmed uniform Zn deposition along the (002) plane without dendrite formation. This work demonstrates a biomass-derived, low-cost electrolyte formulation strategy that effectively stabilizes Zn interfaces, providing a green and efficient pathway for next-generation zinc-ion batteries.

Aqueous zinc-ion batteries (AZIBs) are attractive and promising energy storage systems due to their high safety, low cost, environmental friendliness, and easy assembly. Recently, aqueous zinc-ion pouch batteries (AZIPBs) have achieved rapid development, with a lot of work reported in a short time. However, reviews about AZIPBs are still limited. So here we timely present a review about AZIPBs by focusing on the modification of key materials, including cathode materials, Zn metal anodes, electrolytes, binders, separators, etc. Some basic information such as advantages, challenges, modification strategies of AZIBs and battery structure, existing issues, failure mechanisms of AZIPBs are also summarized and analyzed. Moreover, we put forward some opinions and outlooks based on our research experiences and reference analysis. We find the research of AZIPBs is still in an early and laboratory stage, and related work is too simple. More work should be proceeded in the future in aspects like deep mechanism investigation, practical application evaluation, recycling technology, and utilization of intellectual technology. We hope this review can provide some inspiration for the following research on AZIPBs. This review can attract large attention of related researchers in the future.

This review critically examines the upcycling of petrochemical byproducts into advanced carbon electrodes for energy storage. It uniquely frames the discussion around the “Performance–Sustainability–Cost Trilemma,” providing a comprehensive analysis of green synthesis strategies, multiscale structure-property relationships, and scale-up challenges. The work offers actionable insights for bridging lab-scale innovation with scalable manufacturing, thereby advancing circular economy principles and carbon neutrality goals.

Designing wide-temperature sodium-ion full cells (SIFCs) remains a critical challenge due to sluggish ion transport at low-temperature conditions and parasitic reactions at elevated temperatures. Herein, we report a sodium-ion full cell constructed with a MoS₂ quantum dot (QD)–Ti₃C₂T_x composite as anode, Na₃V₂(PO₄)₃ (NVP) as cathode and 1 M NaClO₄ as electrolyte, which achieves high performance and exceptional wide-temperature tolerance. MoS₂ QDs minimize lattice strain and suppress pulverization, while the conductive Ti₃C₂T_x framework ensures structural stability and fast charge transfer. As a result, the anode delivers a high initial capacity of 630 mAh g⁻¹ at 0.1 A g⁻¹ with 92% coulombic efficiency and retains 432 mAh g⁻¹ after long-term cycling, in half cell configuration. When integrated into a full cell, the device demonstrates remarkable durability with 87% capacity retention after 500 cycles. Temperature-dependent measurements reveal stable operation across −30 °C to 60 °C, with enhanced capacity at elevated temperature due to improved Na-ion diffusion and reliable performance even at −30 °C. These results highlight MoS₂ QD_ Ti₃C₂T_x as a structurally resilient anode material enabling robust wide-temperature sodium-ion full cells, offering a practical route for grid-scale and industrial energy storage applications.

The development of Co-free, Ni-rich layered oxide cathodes is crucial for cost-effective, energy-dense lithium-ion batteries (LIBs). Yet, complete Co elimination remains challenging due to structural and electrochemical instability of high-voltage cathodes. Using LiNi_0.8Mn_0.1Co_0.1O₂ (NMC811) as a reference, herein we demonstrate that replacement of 10 mol% Co with Mg is practically feasible. The Co-free Li_1.1Ni_0.8Mn_0.1Mg_0.1O₂ (NMM811) exhibits markedly reduced antisite defect by increasing Ni–Li exchange energy barrier (∼305.1 meV vs ∼194.6 meV for NMC811), facilitated by partial oxidation of Ni²⁺ and Li⁺ migration toward NiO₆ octahedra, leading to expanded inter-slab spacing and enhanced structural stability. Density functional theory reveals that Mg²⁺ widens bandgap and strengthens Mg─O bonding, mitigating oxygen loss. The NMM811 delivers initial capacity of ∼197 mAh g⁻¹ and energy density ∼620 Wh kg⁻¹. Importantly, the absence of H2→H3 phase transformation affords improved capacity of ∼82 mAh g⁻¹ after 500 cycles at 1C (∼43 mAh g⁻¹ in NMC811) with reduced voltage fading rate (∼0.39 mV cycle⁻¹). Synchrotron-based X-ray absorption studies confirm robust Ni–O coordination prevents structural collapse, while differential scanning calorimetry indicates improved thermal stability (exothermic peak ∼197°C, 1607 Jg⁻¹). Overall, the findings from this work establish NMM811 as a structurally resilient, thermally safe, Co-free cathode for next-generation LIBs.

With the growing demand for sustainable and decentralized energy solutions, thermoelectric energy harvesting has emerged as a promising technology for directly converting waste heat into electricity through solid-state, environmentally friendly means. Among copper chalcogenides, Cu₂Te is a notable p-type material due to its degenerate semiconducting nature and low thermal conductivity. In this study, we present a sustainable synthesis strategy for Sn-doped Cu₂Te referred to as bronze telluride (BT) via a chemical vapor deposition (CVD)-assisted tellurization process using pre-alloyed Cu–Sn (bronze) powder. The resulting BT exhibited an enhanced thermoelectric figure of merit (ZT) of ∼1 at 500 K. To assess practical applicability, BT is integrated with n-type galena (PbS) in a cascaded p–n thermoelectric module, which generated 2.8 mV across a temperature gradient of 33 K, demonstrating its potential for medium- to high-temperature waste heat recovery. Furthermore, thermodynamic calculations and density functional theory (DFT) simulations provided insights into the formation mechanism of Cu₂Te and the thermoelectric behaviour of BT. This work introduces an efficient, scalable, and environmentally responsible pathway for developing copper-based thermoelectric materials using industrially relevant precursors.