Journal of Materials Chemistry A
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2024
·Vol. 12
·期 41
·28531-28540
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IF 10.7
Wenfeng Liu,Zhiyuan Li,Hongbo Liu,Yihan Zhou,Jiakai Zeng,Yi Zhao,Lu Cheng,Yao Zhou,Shengtao Li
The enhancement of the energy storage property of capacitor films at elevated temperature has been considered a critical area of research owing to the essential requirements of capacitor applications. In the present study, a ternary composite system with an improved energy storage property is reported. The ternary composite was composed of PP-graft-AA chains (acrylic acid grafting) and a PP/nano-ZrO2 matrix and was biaxially oriented into a defect-free film with a thickness of 10 μm. The obtained film (BO(PP/AA/Zr)) exhibited an energy storage density of 7.9 J cm−3 at room temperature and maintained a considerably high value of 3.9 J cm−3 at 120 °C. The characterization of charge carrier transportation indicated that the effective biaxial orientation and the introduction of the polar grafted functional group and nanofillers increased the activation energy of molecular chain segment motion and deepened electron trap energy levels, which limited the transportation of charge carriers and significantly enhanced the breakdown strength and energy storage property. Moreover, the designed graft-modified chains (acrylic acid grafted) modified the compatibility between the polymer and inorganic nanofiller, thereby improving the processibility of the defect-free thin film. The results of dynamic mechanical analysis and 2D micro-infrared spectra indicated that the graft-modified chains offset the increased elastic rigidity caused by nanoparticles and facilitated the interaction between inorganic nano-ZrO2 and polymer chains. The study provides a potential solution to the challenge that nanocomposites face during the commercial production of defect-free biaxially oriented films.
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Journal of Energy Storage
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2026
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IF 10.7
Wenxuan Fan,Yan Zhou,Xinglin Zhou,Lei Huang,Xiaohui Ning
The intrinsic three-layer liquid architecture of liquid metal batteries (LMBs) enables a simple cell configuration, high safety, low projected cost, and exceptional theoretical cycle life, making them a promising technology for grid-scale energy storage. However, under high-temperature and multi-physics operating conditions, the corrosion of the stainless steel positive current collector (PCC) by molten cathode metal and halide electrolyte limits long-term durability. A systematic evaluation of commercially available stainless steels under realistic electrochemical, thermal, and chemical conditions is therefore essential. Herein, we investigate the corrosion behaviors of four representative stainless steels (SS201, SS304, SS316, SS430) used as PCCs in Li|LiCl-LiF-LiBr|Bi liquid metal batteries through a two-stage approach combining high-temperature hanging-coupon screening and service-condition cell testing. The results reveal pronounced synergistic corrosion during battery operation, where the combined effects of molten Bi , molten salt electrolyte, and electrochemical polarization substantially accelerate PCC degradation compared to static exposure. Among the investigated materials, SS316 exhibits the highest corrosion resistance, enabling stable cycling without observable capacity decay over 100 cycles. By integrating corrosion resistance, electrochemical performance, and techno-economic considerations, this work establishes an engineering-oriented PCC selection framework and identifies SS316 as the optimal candidate for 200 Ah-scale LMBs, allowing thinner, lighter, and more cost-effective collector architectures. The elucidated corrosion mechanisms under coupled electrochemical, thermal, and flow conditions provide critical insights for the rational design of durable and commercially viable liquid metal batteries.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
JiCheng Liu,ZhaoYang Yao,Shun Gao,Xue Zou
BiOI/Bi 2 WO 6 /MXene composite was successfully synthesized via a solvothermal method, confirmed by XPS/XRD. • Optimal composite degraded 89.3% ranitidine and mineralized 56.0% in 2 h. • EPR analysis indicated that superoxide radicals (•O₂ − ) dominate the degradation process. Ranitidine, a widely used acid-suppressing drug, can undergo nitrosation in aquatic environments to generate N -nitrosodimethylamine (NDMA), a potent carcinogen that poses a serious threat to aquatic ecosystems. To address its persistence against natural degradation, a ternary BiOI/Bi₂WO₆/MXene composite was fabricated via a one-pot solvothermal synthesis. Heterojunction construction effectively broadened its visible-light harvesting capacity. Characterizations by SEM, TEM, XRD, and UV–Vis DRS confirmed the successful formation of the heterojunction with markedly enhanced visible-light absorption. Combined with band structure analysis and radical trapping experiments, a Z -scheme charge transfer mechanism was proposed. Visible-light photocatalytic tests showed that the optimal sample exhibits a high degradation efficiency of 89.3% for RAN, with a 47% relative enhancement compared with pristine BiOI. Radical identification revealed that superoxide radicals (·O₂ − ) were the dominant reactive species. The synergistic effect between the electron-conductive MXene and the interfacial heterojunction accelerated photogenerated carrier separation and ·O₂ − production. Moreover, the composite retained 72.35% of its degradation efficiency after three cycles, demonstrating good stability. This work provides a novel material design strategy for visible-light-driven ranitidine degradation and offers a theoretical basis for mitigating NDMA formation risks.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Yu Tian,Yifei Guan,Fang Yu,Jichao Li,Jian Liu,Shengqing Xia
While transition metal doping is widely adopted to optimize Mg3(Bi, Sb)2-based thermoelectrics, conventional high-concentration doping inevitably induces detrimental grain boundary segregation, creating a convoluted mixed effect that obscures the intrinsic regulatory roles of the dopants. To systematically unveil these fundamental impacts, we establish a low-concentration doping paradigm. By synergizing a precisely controlled low-concentration strategy with an optimized synthesis process, 3d transition metals (Mn, Fe, Co, Cu) are homogeneously incorporated into the bulk lattice without boundary enrichment. Based on this homogeneous microstructural framework, distinct doping effects are systematically revealed. Fe and Co act as highly efficient electron donors, elevating the carrier concentration to >1.5 × 1020 cm–3. In contrast, Mn fundamentally optimizes the carrier scattering mechanism via effective mass reduction, leading to a remarkable 2.6-fold enhancement in carrier mobility. Consequently, the lightly Mn-doped sample achieves an optimal balance, yielding a peak power factor of ∼30.7 μW/(K2cm) and a maximum zT of 1.03. Furthermore, this homogeneously doped sample demonstrates optimized macroscopic durability, retaining consistent electrical properties after 3-month ambient air exposure and withstanding 50 rigorous thermal shock cycles. Ultimately, this work clarifies how homogeneously incorporated dopants regulate transport properties and stabilize the crystal matrix, establishing precise low-concentration as a robust framework for high-performance and durable thermoelectrics.
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ENERGY & FUELS
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2026
·
IF 6
Min Li,Mingshu Zhao,Qiuwen Wang,Haoyu Liu,Zhou Su,Lidong Jiao,Qingyi Ren
Aqueous supercapacitors possess high power density, long cycle life, and rapid charging and discharging capabilities, while their practical application is significantly limited by low energy density. The development of high-performance electrode materials, especially anodes, is crucial for enhancing the energy density of supercapacitor devices. In this work, Bi–Bi2O3 nanoparticles were anchored onto carbon fibers (Bi–Bi2O3@C) via a combined solvothermal and calcination process, using natural cotton to derive the biomass-derived carbon framework. The resulting Bi–Bi2O3@C composite was utilized as an anode material for aqueous supercapacitors, demonstrating excellent electrochemical performance with a specific capacity of 253.5 mAh g–1 (912.6 F g–1) at 1 A g–1. Furthermore, a high-performance cathode material composed of NiS2 nanoparticle-decorated Ni(OH)2 nanosheets (NiS2@Ni(OH)2) was prepared by a simple hydrothermal method to achieve optimal matching with the anode. The obtained NiS2@Ni(OH)2 nanosheets cathode composite displays high specific capacitance of 1984 F g–1 at 1 A g–1 and remarkable rate capability, retaining 57% of its original capacity even at a high current density of 10 A g–1. The constructed NiS2@Ni(OH)2//Bi–Bi2O3@C aqueous asymmetric supercapacitor (ASC) delivers a high energy density of 64.4 Wh kg–1 at a power density of 798.2 W kg–1, and maintains a high energy density of 43.1 Wh kg–1 even at a power density of 15.9 kW kg–1.
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ACS Catalysis
·
2026
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IF 13.6
Lecheng Liang,Shao Ye,Hengyu Li,Peng Li,Kaiyang Xu,Jinhui Liang,Binwen Zeng,Bo Shen,Taisuke Ozaki,Zhiming Cui
The exploration of advanced CO-free catalysts and clarifying the ambiguous kinetic origins and governing factors would undoubtedly open up opportunities to overcome the sluggish kinetics of methanol electro-oxidation and promote the development of direct methanol fuel cells. Herein, we constructed a family of Bi-modified Pt3M intermetallic catalysts (Bi–Pt3M/C) that follow a CO-free dominated pathway. More significantly, we have identified the pivotal factor governing the reaction kinetics in the CO-free pathway, namely, OH binding energy (OHBE). This is because the rate-determining step (RDS) involves both C–H bond activation and water dissociation, and the energy barriers of these processes are effectively captured by OHBE. Accordingly, OHBE can act as an activity descriptor. Specifically, Bi–Pt3In/C stands out from other Bi–Pt3M/C and delivers the mass activity of 36.7 A mgPt–1 at peak potential, far exceeding state-of-the-art Pt-based catalysts reported to date. Taking Bi–Pt3In/C as a proof of concept, we elucidate the origin of enhanced MOR activity by combining theoretical calculations, kinetic isotope effects, and formaldehyde electrooxidation. Moreover, there exhibits a volcano-type trend between OHBE and the activity of Bi–Pt3M/C. Beyond the discovery of ultrahigh-performance catalysts, these findings provide a detailed mechanistic picture of RDS and offer an innovative design principle for advanced catalysts.
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APPLIED GEOCHEMISTRY
·
2026
·
IF 3.5
Rong Peng,Rui Yang,Yuhang Liang,Haichuan Sun,Hui Liu
In anaerobic underground environments, the iron redox cycle is fundamentally driven by microbial activities, wherein the metabolic capacity of individual strains plays a pivotal role. This study investigated the regulatory mechanisms of three carbon sources — acetate, glucose, and lactate — on the iron redox cycle mediated by Comamonas sp. HJ-2 under neutral pH anaerobic conditions in Fe(III)–Fe(II) coexisting and Fe(III)-free systems. The results demonstrated that glucose enhanced Fe(II) bio-oxidation and Fe(III) bio-reduction by promoting energy metabolism. Glucose promoted sustained FMN accumulation, which is consistent with a potential contribution of the glycolysis-pentose phosphate pathway-riboflavin synthesis axis, which accumulated to a final concentration of approximately 0.40 μM. The accumulated FMN may function as an electron shuttle and thereby contribute to Fe(III) reduction. Mineralogical analyses further showed system-dependent effects of glucose. In ferrihydrite-containing systems, glucose inhibited the transformation of ferrihydrite toward more crystalline iron phases, whereas in ferrihydrite-free systems it shifted the product distribution toward a higher proportion of ferrihydrite and a lower proportion of lepidocrocite. Glucose also increased the content of surface-bound Fe(II) on minerals. In conclusion, glucose emerged as the most effective carbon source for optimizing the HJ-2-driven iron redox coupling process, likely due to its association with enhanced energy metabolism, FMN accumulation, and altered mineral phase transformation. This study elucidates the carbon source-dependent mechanisms governing microbial iron cycling in anaerobic environments and highlights the critical role of carbon source selection in enhancing iron biotransformation efficiency.
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ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Weiya Tian,Lixia Guo,Jiaju Lu,Xiaoling Wang,Jiabin Ding,Junxian Hu
Corncob-shaped Bi/V 2 O 3 @NC composite was designed and constructed. • Bi/V 2 O 3 @NC composite delivers 266.9 mAh g −1 at 1 A g −1 , and high rate performance. • Bi/V 2 O 3 heterostructure and carbon shell ease volume expansion for stable cycling. • Phase transition mechanism of Bi/V 2 O 3 @NC composite during cycling was investigated. Bismuth (Bi) is considered a promising anode candidate for alkali metal-ion batteries owing to its abundant natural reserves, outstanding theoretical capacity, intrinsic conductivity, and moderate charge/discharge potential. However, during cycling, it suffers from pulverization and agglomeration, leading to severe volume expansion, structural collapse, and rapid capacity decay. In addition, its sluggish alloying reaction kinetics limits the rate capability and practical applications. To address these challenges, a corncob-shaped Bi/V 2 O 3 @NC composite is designed, in which Bi and V 2 O 3 nanoparticles are uniformly encapsulated within a nitrogen-doped carbon nanoshell. This hierarchical architecture shortens ion/electron transport pathways and provides abundant electrochemically active sites. The Bi/V 2 O 3 heterointerface mitigates the volume expansion of Bi during cycling while enhancing reversible capacity, as evidenced by the stable cycling performance. The nitrogen-doped carbon coating suppresses volume deformation, enhances electrode conductivity, and facilitates ion diffusion, contributing to improved structural stability and electrochemical kinetics. Benefiting from these structural features, the Bi/V 2 O 3 @NC delivers a reversible capacity of 206.5 mAh g −1 at 10 A g −1 and retains 233.4 mAh g −1 after 3500 cycles at 5 A g −1 . Electrochemical analysis and ex situ characterization reveal that this performance originates from the synergistic effect of surface-capacitive and diffusion-controlled processes, with a high capacitive contribution (93.8% at 1.2 mV s −1 ) enabling fast kinetics. The sodium storage mechanism involves reversible alloying (Bi ↔ NaBi ↔ Na 3 Bi) and intercalation (V 2 O 3 ↔ Na x V 2 O 3 ) reactions, as confirmed by ex situ XRD. This work provides a design strategy for metal/metal oxide heterostructures and offers insights into the electrochemical mechanisms of alloy-based anodes for sodium-ion batteries. Download: Download high-res image (301KB) Download: Download full-size image
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Advanced Science
·
2026
·
IF 14.1
Guangmeng You,Jingdan Lei,Kai Xu,Yuntian Fu,Xueke Gu,Chengxiao Peng,Zhen Wang,Jing Chen,Kunpeng Zhao,Chao Wang
Mg 3 (Sb,Bi) 2 has emerged as one of the most promising thermoelectric materials with the potential to complement commercial bismuth telluride. However, its performance is still hindered by pronounced carrier grain-boundary scattering, relatively high lattice thermal conductivity, and poor chemical stability. In this work, we reveal the multifaceted role of Ta in enhancing the thermoelectric performance of Mg 3 (Sb,Bi) 2 -based materials. The incorporation of Ta not only increases carrier concentration through the donor effect, but also boosts carrier mobility by promoting grain growth and reducing the potential barrier. Meanwhile, Ta point defects together with metallic Ta precipitates induce strong phonon scattering, leading to a substantial reduction in lattice thermal conductivity. These synergistic effects yield outstanding TE performance, with a remarkably high zT plateau of 1.8 between 573 and 723 K, surpassing the performance of most previously reported Mg 3 (Sb,Bi) 2 systems. Moreover, a TE module constructed by both p-type and n-type Zintl phases achieves a high conversion efficiency of 9.6% at ΔT of 460 K. This work takes an important step toward the practical application of Mg 3 Sb 2 -based TE materials and devices.
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MATERIALS RESEARCH BULLETIN
·
2026
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IF 5.8
Zhiqi Yao,Kejie Li,Jiaqi Zhao,Haicheng Xia,Zuoling Fu,Sung Heum Park
A RE-doped Bi 4 Ti 3 O 12 perovskite-based luminescence material is developed. • Dual NIR-II emissions of Ho 3+ /Er 3+ are achieved under 980 nm excitation. • High performance (Sr=1.3% K-1) phonon-assisted ratiometric thermometer is constructed. High-performance optical thermometers operating in the second near-infrared (NIR-II) window hold great promise for biomedical applications due to their tissue penetration depth and minimal autofluorescence. However, developing reliable NIR-II thermometers with high sensitivity and robust performance across a wide temperature range remains a challenge. Herein, the luminescence properties and NIR-II ratiometric thermometric performance of Er 3+ , Ho 3+ , Yb 3+ co-doped Bi 4 Ti 3 O 12 (BTO) perovskite oxide were investigated. Upon 980 nm excitation, NIR-II emission from Er 3+ at 1560 nm ( 4 I 13/2 → 4 I 15/2 ) and Ho 3+ at 1200 nm ( 5 I 6 → 5 I 8 ) was achieved. A ratiometric thermometer was constructed using the temperature-dependent intensity ratio, I Er /I Ho . Relying on the thermal dependence of this ratio, the BTO system exhibits a relative sensitivity (S r ) of 1.3% at 333 K. Furthermore, the results suggest that phonon characteristics of the BTO host influence energy-transfer processes and NIR-II thermometric performance, highlighting importance of host properties in designing rare-earth-doped NIR-II thermometric materials. Download: Download high-res image (154KB) Download: Download full-size image A high-sensitivity NIR-II ratiometric thermometer is achieved in Bi 4 Ti 3 O 12 : Yb 3+ , Ho 3+ , Er 3+ Perovskites via a unique phonon-assisted energy transfer pathway.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Xiaorui Zhang,Laiqing Zhang,Hanlin Ye,Zikang Zeng,Jian Yang,Chuang Han,Yujun Liang
Metal ions doping has attracted noteworthy attention for tuning the electronic structure of semiconductors. However, high doping content usually leads to the formation of heterophase or impurity. Herein, ultra-high Bi-doped CeO 2 nanorods (doping amount up to 20 mol%) without dopant segregation were fabricated by pyrolyzing Bi/Ce bimetallic-organic frameworks (Bi/Ce-BMOFs), and adaptive oxygen vacancies (OVs) were introduced. The Bi-doped CeO 2 not only retains the unique porous structure of Bi/Ce-BMOFs, thus possessing a large specific surface area, but also significantly enhances the visible-light response and promotes the redox cycling of Ce 3+ /Ce 4+ ion pairs, thereby accelerating the efficient activation of H 2 O 2 . Moreover, the adaptive OVs serve as electron-trapping sites, further facilitating the separation of charge carriers. Consequently, the Bi-doped CeO 2 exhibits an excellent photo-Fenton degradation efficiency of tetracycline (TC) over a broad pH range (pH = 2-9). Mechanistic studies revealed that ·O 2 – and ⋅OH are the dominant reactive species. Additionally, the possible degradation pathways of TC were explored using joint characterizations. The ecotoxicity of intermediate products formed during the degradation process was also assessed. This work demonstrates the great potential of the Bi-CeO 2 heterojunction in antibiotic degradation and risk control, providing a feasible strategy for designing efficient and stable catalyst with heteroatom doping derived from BMOFs.
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COLLOIDS AND SURFACES B-BIOINTERFACES
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2026
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IF 5.9
Leini Wang,Yinsong Guo,Chengtian Wei,Qiaoqiao Zhang,Ning Wei,Wei Zeng
Highly adaptable pressure sensors are gaining significant interest due to their potential applications in areas, such as artificial skin for wearables, health tracking, and human–machine interface. Here, a new strategy for the fabrication of a flexible wearable pressure sensor based on tissue paper coated with MXene/Bi is reported. Leveraging the inherent flexibility and 3D porous structure of cotton fabric, the sensor demonstrates exceptional performance with high sensitivity (2.73 kPa⁻¹ within 0–20 kPa), a wide detection range (0–1200 kPa), fast response/recovery times (210/100 ms), and long-term durability (3000 cycles). The developed sensor is versatile and suitable for diverse pressure detection, including finger pressing, wrist pulse monitoring, handwriting, and speech recognition. Importantly, tactile sensor array is also designed for the recognition of different tactile stimuli, showcasing significant potential for use in advanced sensor technologies and next-generation wearable electronics.
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