Energy & Environmental Science
·
2023
·Vol. 16
·期 10
·4679-4692
·
IF 32.5
Yiqi Wei,Zhenglong Li,Zichong Chen,Panyu Gao,Mingxi Gao,Chenhui Yan,Zhijun Wu,Qihang Ma,Yinzhu Jiang,Xuebin Yu,Xin Zhang,Yongfeng Liu,Yaxiong Yang,Mingxia Gao,Wenping Sun,Zhiguo Qu,Jian Chen,Hongge Pan
The use of solid-state electrolytes in all-solid-state batteries is a technology with prospects for increasing energy densities. However, poor oxidative stability and issues with dendrite growth significantly hamper their applicability. LiBH4 is considered as one of the most promising candidates due to the thermodynamic stability of Li. Herein, an in situ melting reaction is proposed to generate covalently bonded coordination on the particle surfaces of electrolytes to resolve these issues. This coordination thermodynamically shuts down the electronic exchanges during the anionic oxidation decomposition by covalently bonding the local high-concentration electrons on the anions, and it kinetically blocks electronic percolation on the particle surfaces of electrolytes; this phenomenon leads to an unprecedented voltage window (0–10 V) with a peak oxidation current that is 97.2 times lower and an electronic conductivity that is 3 orders of magnitude lower than that of the counterpart at 25 °C. The coordination can act as a binder to bond electrolyte particles, achieving a remarkable Young's modulus of 208.45 GPa; this modulus is twice as high as that of the counterpart. The remarkable mechanical property of the coordination is capable of adapting the sustained stress–strain release in Li plating and stripping. With these merits, the electrolyte displays a record-breaking critical current density of 21.65 mA cm−2 at 25 °C (twice the best-reported data in Li-ion solid-state electrolytes), cycling stabilities at 10.83 mA cm−2 for 6000 h and under 10 V for 1000 h, and an operational temperature window of −30 to 150 °C. The Li–LiCoO2 cells exhibit superior reversibility at high voltage. Our findings illuminate a clear direction for oxidative stability and dendrite suppression in solid-state electrolytes, making tremendous progress in high-voltage lithium batteries.
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ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 23
·2113068
·
IF 19.924
Xufeng Wang,Yajie Song,Xin Jiang,Qingsong Liu,Jidong Dong,Jian Wang,Xin Zhou,Bing Li,Geping Yin,Zaixing Jiang,Jiajun Wang
The complicated interfacial problems of poly(ethylene oxide) (PEO)-based solid polymer electrolytes (SPEs) at high voltages severely hinder its practical applications for high-energy-density all-solid-state lithium batteries (ASSLBs). Herein, the failure mechanisms of ASSLBs with LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM)-PEO are studied. It is found that the ASSLBs after charge generates a sharp drop of 0.62 V at the cut-off voltage of 4.30 V, and induce a high interfacial resistance due to forming an uneven thick cathode electrolyte interface on the NCM surface, as well as cause the destruction of NCM surface structure during storage, leading to serious performance degradation. Constructing the interfacial nanolayer with aromatic polyamide (APA) on the surface of NCM active particles (NCM@APA) can mitigate interfacial side reactions between NCM and SPE. Robust interfacial nanolayers not only effectively protect the crystal structure of NCM but also provide a steady interfacial environment for Li + diffusion kinetics. Accordingly, NCM@APA||SPE||Li ASSLBs exhibit an acceptable voltage drop of 0.27 V after 10 days storage and a substantially improved electrochemical performance with an average coulombic efficiency of 99.1% and capacity retention of 76.7% at 30 mA g −1 after 80 cycles.
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Inorganic Chemistry Frontiers
·
2025
·
IF 6.4
Wenxuan Zheng,Lin Gao,Mingsong Fan,Zhiyu Dou,Lili Cui,E. Jin
To address the sluggish kinetics and limited current density in the alkaline hydrogen evolution reaction (HER), we designed and synthesized dandelion-like V-doped CoP anchored on carbon cloth (V–CoP-X) via a MOF-derived strategy involving hydrothermal growth and subsequent phosphidation. By precisely controlling the V content in the MOF precursor, we achieve tunable morphologies of V–CoP materials. Experimental analyses reveal that Lewis acid sites of V promote electron transfer and adjust the d-band centers of V–CoP. According to the results of experimental and density functional theory (DFT) calculations, the V-doped CoP lowers the water dissociation energy in alkaline media and optimizes the adsorption energy for H* (ΔGH*). These synergistic effects accelerate water dissociation kinetics as well as optimize adsorption and desorption behavior of H*, leading to improved HER activity in 1 M KOH and 0.5 M H2SO4. As a result, the optimal V–CoP electrode exhibits exceptional HER performance in diverse electrolytes, requiring low overpotentials of 69, 63 and 89 mV to obtain 10 mA cm−2 as well as 212, 254 and 401 mV at 500 mA cm−2 in 1 M KOH, 1 M KOH + 0.5 M NaCl and 0.5 M H2SO4, respectively. Remarkably, V-doped CoP possesses excellent long-term stability at large current density. This work presents a high-performance HER electrocatalyst while providing fundamental insights into the role of V doping in enhancing reaction kinetics.
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TALANTA
·
2025
·
IF 6.1
Zhenxing Guo,Fang Xu,Longfei Su,Qiang Cheng,Liqiang Xu,Guoping Sheng
Fluorescence methods hold great potential for arsenate (As(V)) detection in food safety. However, the development of environmentally friendly and sustainable fluorescence indicators remains at an early stage. Herein, we develop a novel fluorescence sensing platform for As(V) detection. Curcumin (Cur), a plant-derived, non-toxic, and environmentally friendly food additive. Owing to its excellent fluorescent properties, it was used as a green fluorescent indicator in this study. Cerium dioxide nanoparticles (CeO 2 NPs) were synthesized via a green hydrothermal method and then assembled with Cur to form the CeO 2 @Cur fluorescent probe. The detection of As(V) was achieved through an adsorption-desorption mechanism, where As(V) displaces Cur from the CeO 2 surface, thereby restoring its fluorescence. Based on this mechanism, the probe exhibited a linear response (R 2 = 0.991) to As(V) concentrations within the range of 0.10-30.00 μM, with a low detection limit of 25.83 nM. Furthermore, by integrating smartphone-based RGB analysis of fluorescence images, a portable platform was constructed for the on-site detection of As(V). This work thus offers a promising strategy for sustainable and practical solution for As(V) detection in food and environmental samples.
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Food Chemistry-X
·
2025
·
IF 8.2
Zhijie Zhu,Xinxin Ma,Xinyue Pan,Xianfeng Du,Xu Chen
In this study, V-type wheat starch-tea polyphenols complexes (VS-TP) were used to improve the digestive properties and quality characteristics of steamed cold noodles. With TP content increasing from 2.5 % to 10.0 %, the storage modulus of VS-TP complexes decreased from 580.59 to 1341.85 Pa to 379.90–859.61 Pa, likely due to TP disrupting starch chain entanglement via noncovalent interaction (hydrogen bonds and CH–π bonds). TP also enhanced both short-range and long-range ordered structures of V-type starch, and the complexation index rose from 23.76 % to 84.61 % as TP content increased. Notably, the VS-10 %TP group showed a 47.28 % higher resistant starch content than the control group, which may be attributed to TP-V-type starch interactions and TP's amylase inhibition. However, the lightness, hardness, and gumminess of the steamed cold noodles decreased by 7.84 %, 51.46 %, and 49.84 % when adding 10 %TP. Balancing functionality and quality, 5 %TP was optimal for preparing low-digestibility steamed cold noodles with excellent textures.
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JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Yun Guo,Hong-Yi Li,Shuo Shen,Jie Cheng,Jiang Diao,Bing Xie
Chromium sludge is a hazardous solid waste which cannot be effectively treated but only piled up and abandoned, causing serious environment pollution and resource wasting. This work proposes an effective novel process to separately recover all resources in chromium sludge via a sustainable way. The obtained acid solving liquid from chromium sludge is desiliconized by cationic flocculant (PCAM) to induce coprecipitation of polysilicate gel and PCAM , which mixture is calcinated to generate the product of white carbon black in purity of 94.35% with a recovery of 92.58%. After desiliconization, V in the solving liquid is selectively extracted by microemulsion (ME), which is recovered as V 2 O 5 in purity of 99.34% with a recovery of 95.53% by the subsequent procedure of stripping-precipitation-calcination. The Fe 3+ in raffinate is reduced to Fe 2+ cations by Na 2 SO 3 , and is then recovered by H 2 C 2 O 4 precipitation to generate the FeC 2 O 4 product in purity of 99.12% with a recovery of 98.25%. Cr 3+ cations in residual solution are recovered by alkaline precipitation and calcination to generate the Cr 2 O 3 product in purity of 98.25% with a recovery of 92.68%. This work provides fresh penetrations into the synchronous detoxification, resource recovery and value-added utilization of hazardous industrial solid wastes.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Meiqing Chen,Wanxia Li,Bo Ruan,Yuxin Gu,Qingcheng Zhang,Hongling Bu,Peixin Du,Peng Yuan
The interaction between birnessite and dissolved organic matter(DOM) is critical for carbon sequestration and heavy metal immobilization. This study investigated humic acid (HA, a representative form of DOM) in mediating the formation of triclinite birnessite (TB) and elucidated the influence mechanisms for carbon sequestration and As(V) immobilization. HA significantly affected both the growth and structural properties of TB. HA induced TB structural transformation from lamellar-like to honeycomb-like, reduced surface negative charge, and increased specific surface area, oxygen vacancies and hydroxyl groups. HA-Mn(III) complexes and pore trapping enhance organic carbon sequestration synergistically. As(V) immobilization was improved by inner-sphere complexation (via hydroxyl coordination) and electrostatic attraction with the maximum adsorption capacities for HA-mediated birnessite (TB-2H) were 65.140 mg·g⁻¹ , 6.4-fold higher than pure TB. Besides, TB-2H shows low manganese release, high stability and good reusability. These findings achieves synergistic carbon sequestration and As(V) immobilization, providing an innovative strategy for environmental remediation.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Yifan Huang,Minling Gao,Yingxuan Deng,Zulqarnain Haider Khan,Xuewei Liu,Zhengguo Song,Weiwen Qiu
The by-product of the traditional Fenton reaction , colloidal arsenic-‑iron oxide, is migratable and may cause secondary environmental pollution . This paper reported a new strategy involving oxidizing and immobilizing inorganic arsenic using the Fenton reaction, and avoiding the risk of secondary contamination. Lab synthesized ferrihydrite-loaded biochar (FhBC) was developed for oxidizing and binding As(III) and As(V) in aqueous solution. Batch experiments and a series of spectrum analysis (e.g., X-ray photoelectron spectroscopy [XPS], electron paramagnetic resonance [EPR], and Fourier transform infrared spectroscopy [FTIR]) were conducted to study the oxidizing or adsorption capacity and mechanism. The maximum adsorption capacity of FhBC for As(III) and As(V) is 1.315 and 1.325 mmol/g, respectively. In addition, FhBC has an efficient oxidizing capacity within a wide pH range, which is because biochar promotes the Fenton reaction by acting as an electron donator, electron shuttler, or by providing persistent free radicals. Moreover, the adsorption mechanism was studied by FTIR spectroscopy, XPS, and X-ray diffraction (XRD). The formation of internal spherical complexes and iron oxides with a higher degree of crystallization was observed, which indicate that the products of adsorption are stable and robust in a complex environment and can exist in a highly crystallized form after adsorbing arsenic ions. Therefore, the use of FhBC as an adsorbent for arsenic represents a new strategy of using the Fenton reaction while reducing secondary contamination. These results may contribute to further mechanistic studies or extensive practical applications of FhBC.
研究领域:
环境科学
·
化学
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ENERGY & FUELS
·
2019
·
IF 3.021
Jialin Meng,Yufeng Duan,Peng Hu,Yifan Xu,Xinze Geng,Ting Yao,Shaojun Ren,Hongqi Wei
A series of Mn–V–W/TiO2 (Mn–VWT) catalysts were synthesized by the impregnation method and calcinated at different temperatures (300–600 °C). To explore the effects of the reaction temperature, SO2, and H2O on the simultaneous removal performance of elemental mercury (Hg0) and NO, Mn–VWT were investigated by a fixed-bed reaction system. Various techniques (scanning electron microscopy, Brunauer–Emmett–Teller, X-ray diffraction, H2-temperature-programmed reduction, NH3-temperature-programmed desorption, and X-ray photoelectron spectroscopy) were utilized to characterize the samples. The results showed that the catalytic activity of Mn–VWT first increased and then decreased with the increasing calcination temperature. The removal efficiency of Hg0 and NO still had good performance even in low reaction temperature (200 °C), achieving 100 and 82%, respectively. Mn–VWT-400 had the best simultaneous removal performance because of the highest content of the Mn4+, V4+, and chemisorbed oxygen Oα and the best reductive activity at low temperature. Furthermore, SO2 irreversibly inhibited Hg0 and NO removal ability due to the sulfate and sulfite generation on the surface of Mn–VWT-400. Especially, the inhibition effect was more serious if SO2 and H2O coexisted because the rate of sulfate/sulfite was higher than that of the former. In addition, with the increase in reaction temperature, the effect of SO2 and H2O on the removal of Hg0 and NO over Mn–VWT was gradually reduced.
研究领域:
环境科学
·
催化化学
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 4
·287
·
IF 2.8
Tang Ruxuan,Chen Yuan-Bin,Su Xiuyuan,Tang Ling
With the rapid development of 5G/6G mobile communication technology, microwave dielectric materials are facing increasingly strict performance requirements. As core fundamental materials for modern communication systems, performance optimization of microwave dielectric ceramics has become a research hotspot. Addressing the limitations of single-phase ceramic materials, dense microwave dielectric ceramics of (Nd 1- x La x ) 2 [Zr 0.89 (Bi 0.5 Ta 0.5 ) 0.11 ] 3 (MoO 4 ) 9 ( x = 0.01, 0.03, 0.05, 0.07) were prepared by the conventional solid-state reaction method. The experimental process involved 550 °C pre-sintering followed by gradient sintering at 600–725 °C (4 h holding time). X-ray diffraction (XRD) analysis confirmed that all samples exhibited trigonal crystal structure with \(R\overline{3} c\) space group. The lattice parameters were obtained by Rietveld refinement method. Scanning electron microscopy (SEM) characterization indicates that compactness has a significant impact on the dielectric constant ( ε r ) and the quality factor ( Q × f ). Raman spectroscopy analysis indicated strong associations of ε r and Q × f values with characteristic peak shifts and full width at half maximum ( FWHM ), respectively. When sintered at 675 °C, the NLZBTM ( x = 0.03) ceramics exhibited exceptional comprehensive performance: ε r = 11.24 ± 0.02, Q × f = 116,914 ± 5738 GHz, and τ f = − 37 ± 1.5 ppm/℃. The bond property analysis based on the P–V–L theory shows that the ionicity of the Nd/La–O bond makes the greatest contribution to εᵣ , while the covalency of the Mo–O bond significantly affects the Q × f value and τ f parameter. It is noteworthy that this material achieves low-temperature sintering at 675 °C while maintaining excellent microwave dielectric properties, demonstrating significant potential as a candidate material for low-temperature co-fired ceramics (LTCC).
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Inorganic Chemistry Frontiers
·
2024
·
IF 6.1
Qingtao Wang,Xia Hu,Kai Cui,Yanxia Wu,Guofu Ma,Ziqiang Lei,Shufang Ren
An oxygen reduction reaction (ORR) catalyst is a crucial component of metal–air batteries. Herein, modified carbon nanotubes are used to support iron phthalocyanine, followed by the fabrication of single-atom and cluster coexisting catalysts by the fast microwave method. The two catalysts have Fe–N5 and Fe–P–N4 coordination structures, respectively. Electrochemical tests show that the FeNC/Fe–N5–C and FeNC/Fe–P–N4–C catalysts have half-wave potentials of 0.906 and 0.886 V in an alkaline solvent, respectively. The Zn–air battery prepared with the FeNC/Fe–N5–C catalyst has a specific capacity of 791 mA h g−1 and a maximum power density of 190 mW cm−2. DFT calculations show that the axial coordination bonds in FeNC/Fe–N5–C and FeNC/Fe–P–N4–C are conducive to the acceleration of the transfer of electrons. The d-band centers of the axial coordination Fe–N5 and Fe–P–N4 are closer to the Fermi level, confirming that the presence of the axial coordination bonds enhances the adsorption of the reaction intermediates and reduces the ORR barriers.
研究领域:
材料科学
·
电化学
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ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Xueting Pei,Yonghui Chen,Yu Han,Dongyan Zhang,Yuan Ha,Zhimin Li,Yuan Wang
The LiNi 0.8 Co 0.15 Al 0.05 O 2 (NCA) nickel-rich layered cathode material is widely used for Li-ion batteries because of its excellent structural stability and high specific capacity. However, the Li/Ni mixing effect and the generation of interfacial secondary reactions in NCA cathode materials reduce the electrochemical properties of Li-ion batteries. Herein, we report a series of vanadium (V)-doped NCA cathode (VNCA) materials with different amounts of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) polymers in-situ coated on the surface using a liquid-phase method. The introduction of PEDOT:PSS coating not only improves the conductivity of NCA cathode materials but also protects the surface of cathode materials from cracking during the cycle. Electrochemical results show that the PEDOT:PSS (2 wt%) coating possesses high capacity retention rate (83.58%) after 200 cycles at 1 C, which is better than that of the sample without coating (66.7%). The PEDOT:PSS (2 wt%) coated cathode materials also display superior rate performance to VNCA at high magnification. This work provides new methods and theoretical guidance for the development of efficient ternary cathode materials for Li-ion batteries.
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