CERAMICS INTERNATIONAL
·
2026
·
IF 6
Sadegh Ghorbanzadeh,Zeinab Sanaee,Somayeh Mohammadi
Solid-solution MXenes have emerged as a transformative class of 2D materials, offering unprecedented control over electronic structure and redox activity through M-site compositional tuning. However, their broader development remains constrained by the extreme synthesis temperatures (>1400°C) and complex stoichiometric mixing protocols required for conventional solid-state MAX phase synthesis, which result in secondary phase formation, elemental inhomogeneity, and limited scalability. This study addresses these challenges by introducing a low-temperature, pre-alloyed precursor strategy, the first successful synthesis of a quaternary (Ti,V,Fe) 2 AlC solid-solution MAX phase via molten salt-assisted synthesis at a substantially reduced temperature of 950°C, employing commercial Ti-6Al-4V alloy as the precursor to guarantee atomic-scale transition metal distribution. The resulting MAX phase was subsequently converted into (Ti,V,Fe) 2 C MXene via in-situ hydrofluoric acid (HF) etching using three fluoride salts (LiF, NaF, and NH 4 F), demonstrating that etchant chemistry is a powerful parameter for engineering MXene morphology and electrochemical behavior. A key finding of this work is the direct morphology controllability imparted by fluoride salt selection. LiF-assisted etching produces open, loosely aligned lamellae with expanded interlayer spacing (d ≈ 9.55 Å) and the highest specific capacitance of 126.9 F/g at 5 mV/s; NaF-assisted etching yields compact, well-ordered onion-like aggregates (d ≈ 9.45 Å) with superior interfacial charge-transfer kinetics (R ct = 1.58 Ω); and NH 4 F-assisted etching results in aggressively degraded, defect-rich morphology with significantly reduced performance (65.8 F/g). These results establish an energy-efficient, industrially scalable pathway for the production of morphology-engineered, multi-elemental MXene electrodes and provide a robust mechanistic framework linking etchant hydration chemistry to structural architecture and electrochemical function.
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Small
·
2024
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IF 13
Boxiang Gao,Weijun Wang,You Meng,Congcong Du,Yunchen Long,Yuxuan Zhang,He Shao,Zhengxun Lai,Wei Wang,Pengshan Xie,SenPo Yip,Xiaoyan Zhong,Johnny C. Ho
As demand for higher integration density and smaller devices grows, silicon-based complementary metal-oxide-semiconductor (CMOS) devices will soon reach their ultimate limits. 2D transition metal dichalcogenides (TMDs) semiconductors, known for excellent electrical performance and stable atomic structure, are seen as promising materials for future integrated circuits. However, controlled and reliable doping of 2D TMDs, a key step for creating homogeneous CMOS logic components, remains a challenge. In this study, a continuous electrical polarity modulation of monolayer WS 2 from intrinsic n-type to ambipolar, then to p-type, and ultimately to a quasi-metallic state is achieved simply by introducing controllable amounts of vanadium (V) atoms into the WS 2 lattice as p-type dopants during chemical vapor deposition (CVD). The achievement of purely p-type field-effect transistors (FETs) is particularly noteworthy based on the 4.7 at% V-doped monolayer WS 2 , demonstrating a remarkable on/off current ratio of 10 5 . Expanding on this triumph, the first initial prototype of ultrathin homogeneous CMOS inverters based on monolayer WS 2 is being constructed. These outcomes validate the feasibility of constructing homogeneous CMOS devices through the atomic doping process of 2D materials, marking a significant milestone for the future development of integrated circuits.
研究领域:
材料科学
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电子工程
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半导体物理
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Chen Ze,Wang Tairan,Wu Zhuoxi,Hou Yue,Chen Ao,Wang Yanbo,Huang Zhaodong,Schmidt Oliver G.,Zhu Minshen,Fan Jun,Zhi Chunyi
The high redox potential of Zn 0/2+ leads to low voltage of Zn batteries and therefore low energy density, plaguing deployment of Zn batteries in many energy-demanding applications. Though employing high-voltage cathode like spinel LiNi 0.5 Mn 1.5 O 4 can increase the voltages of Zn batteries, Zn 2+ ions will be immobilized in LiNi 0.5 Mn 1.5 O 4 once intercalated, resulting in irreversibility. Here, we design a polymer hetero-electrolyte consisting of an anode layer with Zn 2+ ions as charge carriers and a cathode layer that blocks the Zn 2+ ion shuttle, which allows separated Zn and Li reversibility. As such, the Zn ‖ LNMO cell exhibits up to 2.4 V discharge voltage and 450 stable cycles with high reversible capacity, which are also attained in a scale-up pouch cell. The pouch cell shows a low self-discharge after resting for 28 days. The designed electrolyte paves the way to develop high-voltage Zn batteries based on reversible lithiated cathodes.
研究领域:
材料科学
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电化学
·
能源存储
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PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Yao Yang,Shuyong Liang,Jianqiang Bi,Hongli Hou,Linjing Qiao,Shushuai Liu,Tao Wang,Hongyu Gong,Zhao Qian,Jinwang Shi,Weiqiang Li
In general, the grains of ceramic materials tend to grow and coarsen with the prolonging of holding time at high temperatures due to grain boundary migration. In this study, high-entropy diboride ceramics composed of (Hf 0.2 Zr 0.2 Ta 0.2 V 0.2 Nb 0.2 )B 2 were prepared using spark plasma sintering (SPS) at 30 MPa. Notably, grain refinement of the high-entropy diboride ceramics with increased holding times during the SPS process was unexpectedly observed. Specifically, the grain sizes of the (Hf 0.2 Zr 0.2 Ta 0.2 V 0.2 Nb 0.2 )B 2 were refined from approximately 6 µm (synthesized at 1900°C for 5 min) to around 2 µm (synthesized at 1900°C for 10 min). This intriguing phenomenon is likely attributable to the intrinsic lattice distortion observed in high-entropy ceramics. The introduction of VB 2 was found to significantly enhance lattice distortion, playing a crucial role in the grain refinement of the (Hf 0.2 Zr 0.2 Ta 0.2 V 0.2 Nb 0.2 )B 2 . Notably, the grain refinement resulted in significant improvements in flexural strength and fracture toughness. This work offers a novel strategy for tailoring the microstructure and mechanical properties of high-entropy ceramics.
研究领域:
材料科学
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陶瓷工程
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2026
·
IF 7.1
Lilong Zhou,Chuanshi Tan,Haichao Jiang,Yanchao Qu,Ying Zhang,Yongzhao Zhang,Jimmy Yun
To develop efficient catalysts for chlorinated VOC combustion with enhanced chlorine resistance, V–TiO 2 solid-solution catalysts were prepared via the sol–gel (SG) method and evaluated for chlorobenzene oxidation. In contrast to those synthesized by hydrothermal (HT) and impregnation (IM) methods, the SG-derived V–TiO 2 formed a solid solution with abundant V–O–Ti bonds and V 2 O 5 –TiO 2 interfaces. The TiO 2 acts as an electron donor to V 5+ , promoting oxygen vacancy formation, which facilitates oxygen adsorption and activation. As the amount of incorporated vanadium increases, the activity of the V–TiO 2 catalyst exhibits a volcanic pattern, indicating that constructing an appropriate amount of V 2 O 5 –TiO 2 interface is the key to improving the low-temperature activity of the V–TiO 2 catalyst. The SG-prepared V 2 O 5 /TiO 2 achieved 90% chlorobenzene conversion at 250 °C (GHSV = 22,500 h −1 , C = 1000 ppm), which is significantly lower than previously reported V 2 O 5 /TiO 2 catalysts. There were only a few kinds of byproducts and no chloride organic byproducts were generated. The catalyst also exhibited excellent stability and water resistance. This work offers an effective strategy for designing stable catalysts for chlorinated VOC combustion.
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ACS Nano
·
2026
·
IF 17.3
Deqin Zeng,Jinze Wang,Long Chen,Menghui Wang,Sen Jiang,Feng Shi,Shuoqing Zhang,Sheng Gao,Lili Zhang,Menghua Li,Liping Wang,Hailin Zhu,Ruhong Li,Yuhai Guo,Yuan Yu
Elevating the charging cutoff voltage is critical for practical lithium metal batteries (LMBs); however, this strategy is severely hampered by solvent parasitic reactions. Despite advances in electrode/electrolyte interface engineering, solvent molecules near the interface remain attracted by cathodic parasitic-reaction sites, resulting in solvent decomposition. Here, we propose a separator-adsorbed solvent strategy, establishing a separator–electrolyte interface enriched with adsorption sites that prevents solvent molecules from being captured by cathodic parasitic-reaction sites. The selected polytetrafluoroethylene (PTFE) separator serves to interact with positively charged regions of carbonate solvents. This combination facilitates robust separator–solvent interactions, including C–H···F weak hydrogen bonds and n → π* interactions. Significantly, these interactions generate numerous solvent adsorption sites at the separator–electrolyte interface, which compete with the active cathode surface for solvent molecules. This enables the solvent molecules to escape the attraction of cathodic parasitic-reaction sites and preferentially accumulate on the separator surface, thereby significantly suppressing solvent decomposition and stabilizing the cathode interface. The gel polymer electrolyte with a polytetrafluoroethylene separator (GPE–PTFE) enables a 4.4 V Li||LiNi0.8Co0.1Mn0.1O2 cell to achieve a high-capacity retention rate, maintaining 80% capacity over 671 cycles, nearly double the 368 cycles achieved using a polyethylene (PE) separator. Under an ultrahigh cutoff voltage of 4.7 V, the capacity retention reaches 90% after 100 cycles. This work proposes a paradigm for realizing ultrahigh-voltage LMBs through the separator–electrolyte interface.
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PubMed
高影响因子
CATALYSIS LETTERS
·
2025
·Vol. 155
·期 11
·1-15
·
IF 2.4
Yang Dawei,Hu Yanan,Qi Zhiwei,Li Qiaoling,Yu Chengcheng
The world is currently facing the dual challenges of energy scarcity and environmental degradation. As a highly promising carrier of clean and renewable energy, hydrogen has attracted significant attention, with high-efficiency water electrolysis recognized as a key pathway for the large-scale production of green hydrogen. Among various electrocatalysts, transition metal Co-V-based materials demonstrate remarkable potential. In this study, we successfully synthesized a highly stable amorphous Co-V-B catalyst on a nickel foam (NF) substrate by constructing a Co-V bimetallic system followed by boron doping to enhance its performance. Electrochemical evaluations indicated that the catalyst delivers superior Hydrogen evolution reaction (HER) performance, requiring only 47 mV overpotential to attain a current density of − 10 mA cm −2 , along with a low charge transfer resistance of 1.14 Ω. Additionally, the catalyst demonstrated remarkable durability, sustaining stable HER activity during 16 h of continuous chronopotentiometric (CP) operation. This study systematically explores the preparation of Co-V/NF catalysts and highlights the significant impact of boron incorporation on improving catalytic performance, providing meaningful guidance for developing advanced electrocatalysts for water splitting applications. Graphical
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WATER AIR AND SOIL POLLUTION
·
2025
·Vol. 236
·期 9
·1-18
·
IF 3
Huang Xiong,Pan Yuanfeng,Cai Pingxiong
To address the prevailing issue of arsenic contamination in water bodies, a novel composite microsphere (Fe-CB) was developed for the effective removal of As(V) ions from aqueous solutions. This microsphere was prepared using a sol–gel-titration-freeze-drying method, with chitosan and ferric chloride as raw materials, polyethyleneimine as a modifier and glutaraldehyde as a cross-linking agent. The effects of pH, adsorbent dosage, initial heavy metal concentration, and contact time on the performance of the adsorbent were investigated by a series of adsorption experiments. It was showed that pH played a significant role in determining the adsorption efficiency, while temperature had a relatively minor influence. The adsorption isothermal of As(V) on Fe-CB was best described by Langmuir isotherm model, whereas the dynamic adsorption process fitted the pseudo-second-order or secondary kinetic model well. Notably, the theoretical maximum adsorption capacity was 80.97 mg/g. Furthermore, regeneration experiments demonstrated that Fe-CB maintained a regeneration rate of over 85% even after five cycles, highlighting its excellent recyclability. This study underscores the potential of Fe-CB as an efficient and reusable adsorbent for the removal of As(V) ions from contaminated waters.
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ACS Applied Energy Materials
·
2025
·
IF 5.5
Mengmeng Yan,Dan Zhang,Xin Zhang,Xiaoyan Xie,Kai Yao,Caiqi Ma,Xu Zhao,Shilong Fu,Guangshe Li,Liping Li
Lithium-rich manganese layered (LMR) materials, utilizing the characteristics of both cation and anion redox, are promising cathodes for high-energy-density lithium-ion batteries. However, capacity fading and voltage decay pose challenges to their commercial applications. In this work, we employ chemical bonding to integrate Li3VO4 with Li1.2Mn0.6Ni0.2O2, leveraging their compatible properties to form a stable interface and address related challenges. An epitaxially grown Li3VO4 coating on Li1.2Mn0.6Ni0.2O2 crystals enhances stability at the electrode–electrolyte interface while also improving lithium-ion conduction. Additionally, the strong metal–oxygen bonds between the high-valence V element and Li1.2Mn0.6Ni0.2O2 effectively lower the surface oxygen activity, further preventing oxygen release and irreversible phase transitions. In the assembled half-cell tests, 3 wt % Li3VO4-coated Li1.2Mn0.6Ni0.2O2 exhibits excellent electrochemical performance. After 150 cycles at 200 mA g–1, the discharge specific capacity reaches 188 mA h g–1, with a capacity retention rate as high as 93%. Even under a high current density of 1000 mA g–1, the discharge specific capacity remains at 128 mA h g–1 after 200 cycles. This study highlights the significant impact of bonded lattice-matching materials, presenting a viable design strategy for developing high-performance LMR cathodes.
研究领域:
材料科学
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能源存储与转换
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高影响因子
Nature Energy
·
2025
·
IF 60.1
Liu Yuan,Mao Huican,Bai Rui,Weng Suting,Zhang Qiangqiang,Rong Xiaohui,Chen Xiao,Zhang Chu,Han Shuai,Ding Feixiang,Wang Xuefeng,Lu Yaxiang,Zhao Junmei,Wei Fei,Chen Liquan,Hu Yong-Sheng
Side reactions between high-voltage cathodes and electrolytes remain a critical obstacle to the advancement of solid-state batteries—particularly for Na-ion systems—due to the higher Na + /Na redox potential. Despite recent extensive efforts, achieving a long cycle life is still challenging at the 4.2 V cut-off (versus Na + /Na). Here we design a room-temperature isotropic epitaxial growth to achieve a relatively uniform and dense metal–organic framework epilayer on Na 3 V 2 O 2 (PO 4 ) 2 F surfaces. Despite using polyethylene oxide, a typical ether-based solid polymer electrolyte, the cathode with isotropic epilayer exhibits enhanced cycling performance at the 4.2 V cut-off (retaining up to 77.9% of its initial capacity after 1,500 cycles). Combining experimental measurements and theoretical analyses, the key factor governing isotropic epitaxial growth behaviour is explicitly elucidated. Furthermore, we develop a self-designed high-sensitivity characterization method, in situ linear sweep voltammetry coupled with gas chromatography–mass spectrometry, to elucidate the failure mechanism of polyethylene oxide on Na 3 V 2 O 2 (PO 4 ) 2 F surfaces and and to reveal the excellent electrochemical stability of the isotropic epilayer. Interestingly, the universality of this approach has also been validated, highlighting its strong potential as an effective strategy for enabling high-energy-density batteries.
研究领域:
材料科学
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电化学
·
储能技术
·
固态离子学
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电池技术
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yujing Liu,Qi Liu,Xin Zhou,Xiaohui Liu,Mingyue Li,Zhongqiu Liu,Anguo Ying
Improving the voltage window of aqueous supercapacitors beyond 2.5 V without diminishing their capacitance performance is a big challenge to achieve excellent energy density because of the undesirable water decomposition. Herein, this study developed a novel vanadium phosphate (VPO) of the VO(PO 3 ) 2 aerogel as the electrode to enlarge the device voltage, which could effectively raise HER/OER overpotentials and thus achieving a stable wide electrochemical window of −1 ∼ 1 V (vs. SCE) with remarkably improved capacitance. The VPO microstructure is organized by nanowire-stacked lamellar bricks via engineering a controllable phase-transformation using the V-P-citric acid-aerogel as the precursor. Examined as the supercapacitor electrode, in-situ X-ray powder diffraction analysis uncovers that the VO(PO 3 ) 2 undergoes a reversible phase-transformation reaction associated with Na + intercalation/de-intercalation in Na 2 SO 4 and a typical redox pseudocapacitance process in KOH. For the first time, a 2.8 V symmetric aqueous supercapacitor was further assembled with an energy density of 123.1 Wh kg −1 at the power density of 580 W kg −1 , which is much superior to those of all reported V-base supercapacitors. The underlying mechanisms of the VO(PO 3 ) 2 on ultrahigh voltage window and charge storage are further elucidated, which provide the fundamental guidance for structuring VPO-based electrodes used for commercial energy storage devices.
研究领域:
材料科学
·
电化学
·
能源存储
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高影响因子
CATALYSIS LETTERS
·
2018
·Vol. 148
·期 3
·953-957
·
IF 2.911
Wang Tingting,Wang Zhiming,Zhao Junjing,Yu Qing,Wang Zhongwei
2,4,6-Trimethylbenzoyldipenylphosphine oxide (TPO) is an important photoinitiator, nevertheless some drawbacks exist in its synthesis. So V/MCM-41 catalysts were designed. Compared with commonly used VO(acac) 2 , V/MCM-41 catalysts exhibited excellent TPO yield (92.5%), which makes the usage of inorganic vanadium possible and is benefit both in academic and in industry. Graphical
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