JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Xuan Luo,Luhan Wang,Meng Tian,Yi Tian,Xiao Zhang,Shijie Zhou,Jun Xie,Linlin Hu
O3-type layered oxides are considered ideal cathode materials for sodium-ion batteries (SIBs) owing to their high theoretical capacities, but these materials undergo complex phase transitions during the Na + extraction and insertion, resulting in serious structural degradation and reduced cycling stability. Herein, we employ “Cu/Mg co-doping strategy” to synthesize a stable O3-type layered transition metal oxide NaNi 0.25 Cu 0.1 Mg 0.05 Fe 0.2 Mn 0.4 O 2 (NaNCMFMO) with excellent structural reversibility. The resulting NaNCMFMO achieves reversible specific capacity of 123 mAh g −1 at 0.1 C and remarkable improvement in capacity retention of 79.4 % over 300 cycles at 1.0 C, compared to the pristine NaNi 0.4 Fe 0.2 Mn 0.4 O 2 cathode (42.1 % retention after 300 cycles). Additionally, ex situ X-ray diffraction pattern of NaNCMFMO indicates a highly reversible phase evolution of O3-P3-O3 during charge/discharge cycles, and GITT measurements reveal faster Na + diffusion kinetics. Moreover, a NaNCMFMO//hard carbon full-cell battery exhibits superior electrochemical performance: a high reversible specific capacity of 105.1 mAh g −1 at 1.0 C and capacity retention of 81.1 % over 200 cycles. This work presents a facile and effective strategy to suppress structural degradation in O3-type layered cathodes materials of high-performance SIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2021
·
IF 4.641
Jiayu Li,Jiqing Lv,Feng Shi,Ze-Ming Qi,Runhao Han,Jing Wang
Double perovskite structured Ba(Mg 1/2 Mo 1/2 )O 3 (BMM) ceramics were prepared by traditional solid sintering methods at different sintering temperatures (T s =1250–1325 °C). X-ray diffraction (XRD) data proved a 1:1 ordered face-centered cubic lattice (Fm-3 m), and the ceramic sintered at 1300 °C obtained maximum relative density. The lattice vibration characteristics were identified by Raman spectroscopy and far-infrared reflection spectroscopy. Based on the far-infrared data, a four-parameter semi-quantum model (FPSQ) was applied to calculate the intrinsic properties of BMM ceramics, and the obtained results approximated the measured values. The Raman shift of the BMM F 2g (B) mode (attributed to the centrosymmetric vibration of Ba atom) was shown to be negatively correlated with the corrected permittivity and Ba-O bond length. With increasing sintering temperature (T s ), the relative density is positively correlated with the quality factor ( Q × f) , and the change of Ba-O bond length leads to distortion of the oxygen octahedron, which is positively correlated with the dielectric constant. The sintered BMM ceramics obtained their best dielectric properties at 1300 °C ( ε r = 4.987, Q × f = 23,069 GHz, f = 11.16 GHz).
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Advanced Energy Materials
·
2025
·
IF 26
Hongwei Bi,Xia Sun,Boyang Zhao,Ruiyi Li,Yongguang Zhang,Xiaoen Wang,Meng Zhang,Dan Luo,Zhongwei Chen
Na-ion layered oxides have attracted considerable interest due to their structural and electrochemical similarities to Li-ion counterparts, positioning them as promising cathode materials for sustainable energy storage. However, O3-type Na-ion layered oxides experience severe structural distortions and phase transitions during electrochemical cycling, which significantly deteriorate battery performance. In this study, an ultra-stable O3-type high-entropy doping cathode material is developed, NaNi 0.3 Mn 0.5 Fe 0.05 Li 0.05 Ti 0.05 Cu 0.05 O 2 (NMFLTC), for high-performance Na-ion battery. By partially substituted Ni of NaNi 0.5 Mn 0.5 O 2 (NM) with Fe, Li, Ti, and Cu, Na + diffusion and maintained the structural integrity of NMFLTC is successfully enhanced through the in situ formation of a high-entropy rock salt phase on the surface of the cathode material. This modification not only protects the cathode from structural degradation but also effectively mitigates phase transitions during cycling, leading to favored sodiation/de-sodiation electrochemistry and enhanced structure stability. Attributed to its structural superiorities, the high-entropy doping layered oxide cathode maintains 85.9% and 73.7% capacity retention at 0.1 C and 0.3 C after 200 and 600 cycles, respectively, which marks a significant improvement over traditional undoped NM cathodes. The proposed facile synthesis strategy enables the high entropy cathode material with possibility for large scale production, holding great promises to be utilized for practicalization.
研究领域:
储能
·
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2015
·Vol. 26
·期 5
·3215-3222
·
IF 1.569
Huang Xuechen,Liu Hanxing,Hao Hua,Wang Zhijian,Hu Wei,Xu Qi,Zhang Lin,Cao Minghe
(1 − x)BaTiO 3 –xBi(Y 0.5 Yb 0.5 )O 3 (BT–BYYb, x = 0.01–0.12) ceramics were prepared via solid-state processing techniques. The structure, dielectric and impedance properties of (1 − x)BT–xBYYb ceramics are studied. The studies show that the ceramics are in tetragonal phase when x ≤ 0.07, transform to pseudocubic phase at x ≥ 0.08. The grain growth is obviously suppressed for (1 − x)BT–xBYYb samples with x value. Dielectric properties are depressed and dielectric peaks are broadened with x. T m first increases and then decreases. BT–BYYb system exhibits diffused phase transition and good temperature stability, which is due to the increased cation disorder, forming the local difference of the polar region due to the size and charge difference and inducing many different regions with different Curie points. The samples can meet the temperature requirements of X8R characteristics at 1 kHz with: ε ~ 1330, tanδ ~ 0.0076, |△C/C| ≤ ±15 % (−55 to 150 °C) for x = 0.11 and ε ~ 1032, tanδ ~ 0.012, |△C/C| ≤ ±15 % (−55 to 170 °C) for x = 0.12, respectively. The activation energy of the bulk material obtained from conduction and relaxation first increases and then decreases with increasing BYYb concentration. The different activation energy indicates various mechanisms are involved in the conduction and relaxation process, which may be due to the mixed conduction or doubly ionized oxygen and thermal motions of titanium ions (Ti 4+ ) or doubly ionized oxygen, respectively.
研究领域:
材料科学
·
陶瓷
·
介电材料
·
电子陶瓷
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Bei Hu,Fushan Geng,Chong Zhao,Bertrand Doumert,Julien Trébosc,Olivier Lafon,Chao Li,Ming Shen,Bingwen Hu
The layered Mn-based oxides (NaxMnO2), which is one of the most promising cathode families for rechargeable sodium-ion batteries, have received considerable attention because of their tunable electrochemical performances and low costs. Herein, a novel P2/O3 intergrown Li-containing Na0.8Li0.27Mn0.68Ti0.05O2 cathode material prepared by Ti-substitution into Mn-site is reported. Benefiting from the synergistic effects of the biphasic composite structure and inactive d0 element substitution, this P2/O3 electrode exhibits high initial charge/discharge capacity and excellent cycling performance. The combination of different characterization techniques including solid-state NMR, electron paramagnetic resonance, X-ray adsorption spectroscopy, and high-resolution transmission electron microscopy gives insights into the local electronic environment, the redox chemistry, and also the microstructure rigidity of these cathode materials upon cycling. On the basis of comprehensive comparison with the Ti-free P2/O3-Na0.8Li0.27Mn0.73O2, the observed improvement on the electrochemical performance is primarily attributed to the mitigation of notorious Mn3+/Mn4+ redox and the enhanced stability of the oxygen charge compensation behavior. From the viewpoint of structure evolution, Ti-substitution restrains the Li+ loss and irreversible structural degradation during cycling. This study provides an in-depth understanding of the electronic and crystal structure evolutions after inactive d0 element substitution and may shed light on the rational design of high-performance P2/O3 biphasic Mn-based layered cathodes.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Ying Yang,Hua Li,Yilong Hou,Ce Wang,Kangyi Zhang,Zhihao Man,Jiangwei Shang,Xiuwen Cheng
Antibiotics that permeate aquatic environments present significant risks to both ecosystems and human health. In this study, we employed the techniques of room temperature aqueous solution precipitation to fabricate ZIF-67 derivatives, and established a Co 3 O 4 /CeO 2 /O 3 /PMS (Co-Ce/OP) system. Furthermore, a 10 mg/L Levofloxacin (LEF) solution could reach rapid degradation (97.2%) and effective mineralization (40.4%) under specific conditions. Subsequent investigations identified the primary active substances, intermediates, and reaction mechanism in the Co-Ce/OP system. Evidence from Electron Paramagnetic Resonance (EPR) and quenching experiments indicates that SO 4 · - , OH·, O 2 · - and 1 O 2 contribute to the degradation process. Applying High Performance Liquid Chromatography-Mass Spectrometry (HPLC-MS), we discovered that the principal degradation mechanisms for LEF encompass the cleavage and subsequent loss of the piperazine, quinolone, and morpholine rings, in addition to decarboxylation and defluorination reactions. Besides, we studied the acute toxicity, bioconcentration factor, developmental toxicity, and mutagenicity of LEF and its intermediate products. Our findings reveal a notable reduction in the toxicity of the intermediate products relative to LEF. Later experiment demonstrates that the degradation rate of LEF sustains above 90% after five cycles of reactions, indicative that the catalyst has excellent recyclability and stability. Furthermore, this study employed experiments across four different natural water matrices, demonstrating the system's considerable potential for effective application within authentic aquatic settings.
研究领域:
环境科学
·
材料科学
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2018
·
IF 3.849
Weirui Chen,Zulin Zhang,Xukai Li,Dan Wu,Ying Xue,Laisheng Li
Fe-Cu-MCM-41/O 3 was first used as an alternative to O 3 to control disinfection by-products generation from chlorinated-disinfection of Br-containing Diclofenac. Accompanying with decrease of TOC , THMs and HAAs had an initial increase, reaching the highest at 30 min, then gradually decreased. Coupling Fe-Cu-MCM-41 with O 3 successfully enhanced TOC removal and inhibited bromate, THMs and HAAs formation in post-chlorination when compared with those in ozonation . Four kinds of THMs and six kinds of HAAs were detected. CHCl 3 was main Cl-THMs and CHBrCl 2 was main Br-THMs. CHCl 2 COOH was the dominant Cl-HAAs and CHClBrCOOH was main Br-HAAs. A converse Br-THMs order was observed in O 3 and Fe-Cu-MCM-41/O 3 pre-treatment. Fe-Cu-MCM-41 decreased ozone exposure, reducing the direct reaction of O 3 with Br − to form bromate. More DBPs precursors in Fe-Cu-MCM-41/O 3 were removed by ·OH. H 2 O 2 , which generated during pre-treatment process, reduced HBrO/BrO − to Br − , inhibiting both its reaction with Br-DBPs precursors and bromate formation. The pre-treatment process changed intermediates’ properties and hydrophilic DOM was the dominant component. Hydrophobic acids and transphilic DOM were the main chlorine consuming intermediates and had major contribution to DBPs formation. Fulvic-like intermediates was suggested as precursors of Br-DBPs. Fe-Cu-MCM-41/O 3 were suggested as a good alternative to O 3 pretreatment.
研究领域:
环境科学
·
水处理工程
✓ 已验证
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Xu Zhu,Haojie Dong,Yifeng Liu,Yi-Hu Feng,Yongwei Tang,Lianzheng Yu,Shao-Wen Xu,Guang-Xu Wei,Shuai Sun,Mengting Liu,Bing Xiao,Rong Xu,Yao Xiao,Shulei Chou,Peng-Fei Wang
Sodium-ion batteries (SIBs) have captured widespread attention for grid-scale energy storage owing to the wide distribution and low cost of sodium resources. Delivery of high energy density with stable retention remains a challenge in developing cathode candidates for rechargeable SIBs. Inspired by the concept of “cationic potential”, here, we present a hierarchical crystalline domain in hexagonal particles with target chemical composition (Na0.8Li0.03Mg0.05Ni0.28Fe0.05Mn0.54Ti0.05O2) from the inner bulk O3 phase (71.1 wt %) to the outer P2-type shell (28.9 wt %) of the structure. Benefiting from the mitigated mechanical stress of the predominant bulk O3 phase under the protection of the surficial P2 crystalline domain at the microscale during Na+ (de)intercalation, the brittle fracture, plastic yielding, and structural damage of the bulk O3 phase are effectively prohibited during battery cycling, thereby achieving good structural integrity. As a consequence, the biphasic P2/O3–Na0.8Li0.03Mg0.05Ni0.28Fe0.05Mn0.54Ti0.05O2 material exhibits satisfactory electrochemical properties, with a high energy density of 506 Wh kg–1 and good capacity retention of 85.5% over 200 cycles. This work highlights the importance of tailoring the crystalline domain to mitigate the reaction-induced stress and particle fracture of layered biphasic cathode materials for high-energy SIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Qinghui Ren,Yong Li,Lanlan Lei,Guangming Wang,Jie Hou,Weile Xu,Shouman Chen,Shuyue Li,Liping Chen,Juan Wang
O3-NaNi 1/3 Fe 1/3 Mn 1/3 O 2 layered cathode material has been widely concerned by the industry for its advantages of simple preparation, low cost and high theoretical specific capacity. However, due to a series of surface side reactions, some transition metal ions are reduced, resulting in structural Jahn-Teller distortion, leading to poor structural stability . Herein, Ti element is introduced into O3-NaNi 1/3 Fe 1/3 Mn 1/3 O 2 cathode material, and the effect of Ti doping on the phase structure and electrochemical properties of the material is analyzed in detail. The results show that Ti doping can enlarge the Na layer spacing and decrease the transition metal layer spacing. Thus, the modified material has a smaller Na ion diffusion barrier and a more stable structure. These advantages give a sample with a doping rate of 2.5 wt% a rate capacity of 74.8 mAh g −1 at 10 C, a capacity retention rate of 86.2 % after 100 cycles at 1 C, and an energy density of 320.5 Wh kg −1 for a full cell structure using a hard carbon anode. This strategy provides a valuable reference for cationic doping to improve the properties of O3 layered transition metal oxides .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 3
·659
·
IF 4.2
Zedian Li,Liangrui Xiang,Shijia Pan,Dahai Zhu,Shen Li,He Guo
This research constructed a novel O3/CaO2/HCO3−system to degrade antibiotic oxytetracycline (OTC) in water. The results indicated that CaO2andHCO3−addition could promote OTC degradation in an O3system. There is an optimal dosage of CaO2(0.05 g/L) andHCO3−(2.25 mmol/L) that promotes OTC degradation. After 30 min of treatment, approximately 91.5% of the OTC molecules were eliminated in the O3/CaO2/HCO3−system. A higher O3concentration, alkaline condition, and lower OTC concentration were conducive to OTC decomposition. Active substances including ·OH,1O2,·O2−, and ·HCO3−play certain roles in OTC degradation. The production of ·OH followed the order: O3/CaO2/HCO3−> O3/CaO2> O3. Compared to the sole O3system, TOC and COD were easier to remove in the O3/CaO2/HCO3−system. Based on DFT and LC-MS, active species dominant in the degradation pathways of OTC were proposed. Then, an evaluation of the toxic changes in intermediates during OTC degradation was carried out. The feasibility of O3/CaO2/HCO3−for the treatment of other substances, such as bisphenol A, tetracycline, and actual wastewater, was investigated. Finally, the energy efficiency of the O3/CaO2/HCO3−system was calculated and compared with other mainstream processes of OTC degradation. The O3/CaO2/HCO3−system may be considered as an efficient and economical approach for antibiotic destruction.
研究领域:
环境科学
·
化学工程
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Juntao Huang,Saifei Wang,Zhifei Zhang,Mingli Chen,Han Wang,Haihua Huang,Qian Wang,Jigong Hao,Wei Li,Juan Du,Mahesh Kumar Joshi,Peng Fu
Ceramic dielectric capacitors have gained significant attention due to their ultrahigh power density, current density, and ultrafast charge–discharge speed. However, their potential applications have been limited by their relatively low energy storage density. Researchers have employed various approaches to enhance their energy storage density. In this study, (1 – x)(Bi0.5Na0.5)0.7Sr0.3TiO3–xCa(Mg1/3Ta2/3)O3 ceramics were prepared via a solid-phase reaction, and the effect of their structure on the energy storage properties was investigated. The results indicate that the introduction of Ca(Mg1/3Ta2/3)O3 significantly alters the multiscale structures of the (Bi0.5Na0.5)0.7Sr0.3TiO3 ceramic, including the transformation from the T-phase to the C-phase, refinement of ceramic grains, and the formation of polar nanoregions (PNRs), accompanied by an increase in the bandgap and relaxation degree. These structural changes collectively contributed to the improved overall energy storage properties of the modified ceramics. Notably, the 0.92(Bi0.5Na0.5)0.7Sr0.3TiO3–0.08Ca(Mg1/3Ta2/3)O3 ceramic demonstrated a recoverable energy storage density (Wrec) of 8.37 J/cm3 with an energy storage efficiency (η) of 87.7% at an electric field of 530 kV/cm. It also exhibited good temperature stability (25–120 °C), frequency stability (1–100 Hz), and fatigue stability (1–105). Furthermore, it displayed exceptional charge and discharge properties, with the discharge energy density (WD), discharge time (t0.9), current density (CD), and power density (PD) attaining 4.06 J/cm3, 35.2 ns, 2143.28 A/cm2, and 460.71 MW/cm3, respectively. These findings suggest that modified (1 – x)(Bi0.5Na0.5)0.7Sr0.3TiO3–xCa(Mg1/3Ta2/3)O3 ceramics are promising candidates for high-power pulsed electronic systems.
研究领域:
材料科学
·
无机非金属材料
·
电介质物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Energy
·
2025
·
IF 17.1
Mengting Liu,Zhao-Kun Guan,Xian-Zuo Wang,Si-Fan Chen,Xin-Yu Fan,Chang Guo,Xue-Ru Liu,Shao-Wen Xu,Tian-Ling Chen,Peng-Fei Wang
Extending the depth-of-charge of the O3-type layered oxide cathodes provides a feasible solution to elevate the energy density of the sodium-ion batteries (SIBs). However, detrimental/irreversible P-to-O phase transition resulting in severe structural distortion and rapid capacity decay frequently occurs during high-voltage region above the 4.0 V cutoff. To address these challenges, herein, a rational high-entropy strategy is employed to develop a Co-free Na 0.9 Ni 0.3 Fe 0.2 Mn 0.3 Ti 0.1 Cu 0.05 Sn 0.05 O 2 prototype cathode with the extended depth-of-charge to 4.2 V cutoff. Not only the suppressed P3-to-OP2 phase transition by slab gliding at the deep state of charge but also the resistant ability to humid air is obtained. Consequently, owing to the inhibited deteriorated structural degradation upon high-voltage cycling, the high-entropy compound manifests quasi-zero strain feature (1.29 % volume variation), good rate capability (101.3 mAh g −1 at 10 C), long-term cycling stability (90.7 % over 400 cycles at 5 C) and a high energy density of 299.3 Wh kg −1 in full cell with slight capacity decay (3 % after 200 cycles at 1 C). This work highlights the significance of the high-entropy strategy in stabilizing the P-to-O structural degradation at deep desodiation state and enhancing the air stability of O3-type layered cathodes for SIBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）