ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Ranran Li,Yanying Liu,Zhen Wang,Jianling Li
Sodium-ion batteries (SIBs) have been considered to be an appealing alternative as alternatives for Lithium-ion batteries (LIBs) on account of abundant resources and low prices. Different cathode materials have been extensively studied, especially layered oxides (P2 or O3). However, it is crucial to design an appropriate cathode material for SIBs with excellent comprehensive performance. Herein, a biphasic cathode material with P2 and O3 structures is successfully synthesized by Sn substitution in Na 0.67 Ni 0.33 Mn 0.67 O 2 , which is clearly proved by the XRD and HRTEM results. And Fullprof program refinement is used to determine the optimal phase ratio of P2 and O3. Besides, the XRD tests at different voltages illustrate that the cathode material has good reversibility and structural stability during charge and discharge. Due to the synergistic effect of P2 and O3 phase, when the phase ratio is about 1:1, the biphasic material P2/O3–Na 0.67 Ni 0.33 Mn 0.57 Sn 0.1 O 2 exhibits the most outstanding electrochemical performance. The P2/O3–Na 0.67 Ni 0.33 Mn 0.57 Sn 0.1 O 2 cathode delivers a high reversible initial capacity of 155.2 mA h g −1 during the voltage range from 2.0V up to 4.3V with an excellent initial Coulombic efficiency of 98.95%, as well as the satisfactory rate performances and cycling performance. GITT testing also demonstrates the D Na+ of biphasic material is more stable and conducive to the diffusion of sodium ions . These results will pave a significant way for designing cathode material for SIBs with different structure by the substitution of transition metal elements.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2015
·
IF 2.947
Xiaowei Chi,Zhaoyin Wen,Jingchao Zhang,Yu Liu
A novel hybrid route, combining simple co-precipitation and conventional solid state reaction, is proposed for the first time to synthesize BaCe 0.4 Zr 0.4 Y 0.2 O 3− δ powders at a temperature as low as 1150 °C. This temperature is much lower than that used for conventional solid state reaction method and even comparable to that used in sol–gel route. The reasons for the low calcination temperature are analyzed in detail from the macroscopic to microscopic viewpoints. Moreover, with the powders made by the novel method, dense ceramic could be easily obtained. Further, impedance data illustrated that its electrical conductivity in wet H 2 at 750 °C is up to 1.39 × 10 −2 S/cm, which is the highest among all the samples prepared by the three different methods and much higher than the reported results related to BCZY proton conductors . Also, the new method is particularly suitable for other multi-component oxides .
研究领域:
材料科学
·
无机化学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2022
·
IF 8.431
Yingzi Lin,Junjie Chen,Hao Li,Lei Chen,Baoling Yuan,Chunyan Shi,Siwen Li,Gen Liu,Yuefeng Xie
Acid red 73 (AR73) is a representative dye pollutant that poses a threat to the environment and human health. Effectively removing this type of pollutant by conventional processes is difficult. However, this study found that compared with UV/PDS, UV/O 3 , and PDS/O 3 , UV/O 3 /PDS composite system had the highest degradation effect on AR73. The degradation efficiency in the composite system reached 97.61% within 30 min, and the synergistic coefficients in the composite system were all greater than 1. In the UV/O 3 /PDS system, ·OH was the main free radical that mainly degrades AR73. The increase of PDS dosage promoted the degradation of AR73, but the increase of O 3 dosage was difficult to greatly improve the degradation of AR73 effect. The kinetic model of the apparent reaction rate was determined. The UV/O 3 /PDS system can efficiently degrade AR73 in a wide range of substrate concentrations and pH levels, and at the same time showed good adaptability to various concentrations of anions (Cl − , CO 3 2− , SO 3 2− , and C 2 O 4 2− ). Under raw water quality, the degradation effect of AR73 was still as high as approximately 90%. The theoretical attack site was obtained by DFT calculation , and the possible degradation pathway of AR73 was proposed based on the GC-MS spectrum and UV–Vis absorption spectrum . The attack of –N N- by ·OH, SO 4 − , and O 3 was proposed to be the main possible degradation pathway for AR73. Therefore, this study further improves the understanding of the UV/O 3 /PDS system and shows the potential applicability of this system in the treatment of dye wastewater.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2020
·Vol. 82
·期 5
·861-876
·
IF 1.638
Zhang Liping,Wu Shengnian,Xiang Jun,Jiao Xiaofei,Wang Jing
Salicylhydroxamic acid is an effective and selective collector for tungsten and molybdenum ores. However, the salicylhydroxamic acid flotation wastewater discharge may cause damage to the water environment for the residual processing reagents with poor biodegradability. Combined O 3 and biological aerated filter (BAF) has a well-known potential for removing refractory or toxic organic pollutants. Combined process of O 3 and BAF (O 3 -BAF) was applied to treat the simulated wastewater from W-Mo mineral processing in this study. Compared single ozonation to O 3 -BAF, various influencing factors were discussed like O 3 dosage, reaction time, initial pH value, gas–water ratio and organic loading. Meanwhile, degradation mechanism of salicylhydroxamic acid was reduced. Under the optimal experiment conditions as pH value 8, O 3 dosage 1.3 mg·L −1 , reaction time 15 min, the five-day biochemical oxygen demand (BOD 5 )/chemical oxygen demand of potassium dichromate (CODCr) value increased to from 0.19 to 0.35. The effluent was pumped to the following BAF process, when the optimal experiment conditions was organic load = 0.82 kgCODCr (m −3 ·d −1 ), gas-water ratio = 6:1, CODCr concentration of effluent was 28.92 mg·L −1 and the removal ratio was 86.26%, while the removal ratio could higher to 91.12% for the O 3 -BAF combined process. The effluent could meet the discharge and reuse emission standards requirements in China. UV-vis absorption spectra and high performance liquid chromatography showed the degradation pathway of salicylhydroxamic acid by ozone oxidation was salicylhydroxamic acid → salicylic acid + hydroxylamine → catechol → maleic → small molecular organic acid → carbon dioxide + water. Salicylhydroxamic acid (SHA) is considered as an effective and selective collector for flotation. Combined O 3 -BAF has a well-known potential for removing refractory or toxic organic pollutants. Degradation mechanisms of salicylhydroxamic acid was reduced. Effluent could not reach the discharge or reuse standard in China. The BOD 5 /CODCr value increased to 0.35 after only 15 min reaction, which could meet the requirement of the following biological treatment. The degradation pathway was deduced as the following: salicylhydroxamic acid → salicylic acid + hydroxylamine → catechol → maleic → small molecular organic acid → carbon dioxide + water.
研究领域:
环境科学
·
化学工程
·
矿物加工
·
水污染控制
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Xin Wan,Yanyun Zhang,Fangfang Dong,Ning Wang,Congyi Hao,Xiang Huang,Wei Liu,Yongcheng Jin
O3-type layered oxide materials are considered one of the most promising cathode materials for sodium-ion batteries due to their high capacity. However, the structural evolution of the O3-type layered oxide during cycling is more complex, exhibiting poorer structural reversibility. In order to achieve a high electrochemical performance of O3-type sodium-ion cathode materials, we adopted a high-entropy strategy to realize multielement codoping of Mg, Co, and Ti into the transition metal layer of O3-type NaNi0.4Fe0.2Mn0.4O2 and prepared a high-entropy cathode material of NaNi0.35Mg0.05Fe0.15Co0.05Mn0.35Ti0.05O2 (NMFCMT-2). The transition metal layer doped with multiple elements Mg, Co, and Ti not only stabilizes the crystal structure and widens the layer spacing but also weakens the Na–O bonding, thereby facilitating sodium-ion diffusion and mitigating volume changes during the charge–discharge process. In situ XRD results show that this strategy can delay the phase transition of O3–P3 and realize the phase transition of P3–O3 in advance during the discharge process so that NMFCMT-2 can maintain the O3 phase to a greater extent during the cycles. The results show that the capacity retention rate was 80.6% after 200 cycles at 1C and 88.6% after 200 cycles at 5C. In addition, its high voltage cycling stability is also significantly improved compared to the pristine NaNi0.4Fe0.2Mn0.4O2.
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
Materials Horizons
·
2024
·Vol. 11
·期 16
·3935-3945
·
IF 12.2
Guohua Zhang,Yuheng Gao,Ping Zhang,Yuheng Gao,Jingrong Hou,Xuemin Shi,Jiwei Ma,Renyuan Zhang,Yunhui Huang
O3-type layered oxide cathodes are promising for practical sodium-ion batteries (SIBs) owing to their high theoretical capacity, facile synthesis, and sufficient Na+ storage. However, they face challenges such as rapid capacity loss and poor cycling stability, mainly attributed to irreversible phase transitions. To address these challenges, a novel cathode material, Li/Sn co-substituted O3-Na0.95Li0.07Sn0.01Ni0.22Fe0.2Mn0.5O2 (LSNFM), has been designed by regulating the electronic structure, in which Li+ activates more redox reactions of Ni2+/3+ and Fe3+/4+ above 2.5 V and suppresses the redox reactivity of Mn3+/4+ below 2.5 V, while Sn4+ can prevent the charge delocalization in the transition metal layer, contributing to structural stability. Due to this synergistic effect, the as-prepared LSNFM electrode with high structural reversibility displays a 27.2% capacity increase contributed by the high-voltage transition metal ion redox activity and exhibits excellent long-term cycling stability, an 84.0% capacity retention after 500 cycles at 1 C and an 84.7% capacity retention after 2000 cycles at 5 C. The fundamental mechanism is fully investigated using systematic in situ/ex situ characterization techniques and density functional theory computations. This work provides a paradigm for designing long-term cycle life cathode materials by synergistically regulating the electronic structure in practical SIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Qian Meng,Qiming Liu,Kai Wang,Xiaoting Xu,Wentong Li,Ting Hu
Enhancing the cycle stability of sodium-ion battery cathode materials at high current rates remains a critical challenge. Although layered oxides exhibit high capacity, their long-term stability requires improvement. In this study, we present a low-Ni, Co-free P2/O3-Na 0.8 K 0.05 Ca 0.05 Ni 0.2 Fe 0.2 Mn 0.55 Mg 0.05 O 2 layered oxide, engineered through dual-site doping and cation potential to create a stable two-phase structure The synergistic effects of K-Ca-Mg co-doping and the P2/O3 hybrid structure effectively suppress detrimental phase transitions and Na + /vacancy ordering at high voltage, enhancing both rate capability and cycle stability. The material exhibits a high reversible discharge capacity of 143 mAh g −1 at 0.1C, and maintains over 80 % capacity retention after 250 cycles at 1C and excellent rate performance (96 mA h g −1 at 5C and 82 mA h g −1 at 10C. Even after 600 cycles at 10C, the capacity retention remains 80 %). Galvanostatic intermittent titration technique (GITT) analysis also confirms superior Na + diffusivity compared to conventional Ni-Fe-Mn layered oxides and density functional theory (DFT) calculations further validate the feasibility of the dual-position doping strategy, demonstrating its effectiveness in enhancing electrochemical performance through the synergistic effect of K-Ca-Mg. In conclusion, these findings highlight the potential of P/O-KCNFMM as a high-performance cathode material, leveraging the combined advantages of dual-site doping and the P2/O3 hybrid structure, thus providing new insights into the design of sodium-ion battery cathodes.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IONICS
·
2025
·
IF 2.6
Zhou Yongkang,Su Zihao,Miao Jie,Peng Gongchang,Wang Hao
O3-type NaNi 1/3 Fe 1/3 Mn 1/3 O 2 (NFM) is recognized as a highly promising cathode material for sodium-ion batteries owing to its cost-effectiveness, substantial theoretical capacity, and facile synthesis. Nevertheless, this material suffers from rapid capacity decay caused by structural degradation and irreversible phase transitions at high voltages (> 4.0 V vs. Na + /Na). Herein, partial substitution of Fe 3+ sites with Ti 4+ in the transition metal layer was implemented. Systematic investigations via X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) reveal that Ti substitution effectively stabilizes the layered framework by suppressing detrimental phase transitions through enhanced structural pillar effects. The optimized NaNi 1/3 Fe 0.23 Mn 1/3 Ti 0.1 O 2 delivers a specific capacity of 144.1 mAh g −1 within 2.0–4.2 V at 0.1 C, demonstrating 71.3% capacity retention after 100 cycles at 1 C (130 mA g −1 ). This work establishes a viable strategy for enhancing structural stability in O3-type cathodes through selective cation substitution. Graphical
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Jiatai Wang,Yan Tan,Xi Wen,Hongyun Liu,Chao Fan,Yibo Zhang,Yuan Xu,Xingyu Zhao,Mengting Li,Jian Li,Jingfu Hu
Sodium-ion batteries (SIBs) have emerge as promising alternatives to lithium-ion batteries (LIBs), attributed to their abundant sodium resources and economical pricing. Among various cathode materials , P2 and O3-type layered oxides have garnered significant attention for their superior electrochemical properties . In this study, NaNi 0.5 Mn 0.45 Mg 0.05 O 2 (P2/O3-NMM) cathode material was effectively synthesized using a homogeneous coprecipitation technique with di-n-butylamine as the precipitating agent. The findings indicate that the P2/O3-NMM cathode material synthesized at 850 ℃ for 16 h exhibits a capacity retention of 62.33 % after 200 cycles at a current density of 1 C. The results indicate the biphasic synergy of P2/O3 integrates the rapid Na + migration of the P2 phase with the high capacity of the O3 phase, substantially improving cathode electrochemical performance . This work provides an effective strategy for developing biphase cathodes in SIBs.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Ping Zhang,Guohua Zhang,Yukun Liu,Yuxin Fan,Xinyue Shi,Yiming Dai,Shiwen Gong,Jingrong Hou,Jiwei Ma,Yunhui Huang,Renyuan Zhang
Fe/Mn-based layered oxide cathode is regarded as a competitive candidate for sodium-ion batteries (SIBs) because of its high theoretical capacity, earth abundance and low cost. However, its poor cycling stability still remains a major bottleneck. Herein, P 2/O3 biphasic Na 0.67 Fe 0.425 Mn 0.425 Cu 0.15 O 2 layered oxide is successfully synthesized via a sol–gel method. It is observed that Cu substitution can facilitate the conversion of P 2 to O3 phase, and the P 2/O3 composite structure can be obtained with an appropriate amount of Cu. Meanwhile, in-situ XRD reveals that constructing P 2/O3 composite structure can realize the highly reversible phase transition process of P 2/O3– P 2/ P 3–OP4/OP2 and decrease the lattice mismatch during Na + insertion/extraction. Consequently, the biphasic P 2/O3-Na 0.67 Fe 0.425 Mn 0.425 Cu 0.15 O 2 electrode exhibits 87.1 % capacity retention after 100 cycles at 1C, while the single phase P 2-Na 0.67 Fe 0.5 Mn 0.5 O 2 electrode has only 36.4 %. Therefore, the constructing biphasic structure is proved to be an effective strategy for designing high-performance Fe/Mn-based layered oxide cathodes.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 35
·18872-18880
·
IF 11.9
Ningyun Hong,Jianwei Li,Shihong Guo,Huawei Han,Haoji Wang,Xinyu Hu,Jiangnan Huang,Baichao Zhang,Fang Hua,Bai Song,Nesrin Bugday,Sedat Yasar,Serdar Altin,Wentao Deng,Guoqiang Zou,Hongshuai Hou,Zhen Long,Xiaobo Ji
O3-type NaNi1/3Fe1/3Mn1/3O2 (NFM) is one of the most representative cathode materials with low cost and high capacity advantages. However, the sluggish diffusion kinetics and severe cathode–electrolyte interfacial reaction are serious roadblocks to commercialization. Hereby, a novel method of in situ V-modification is well-designed to play dual roles in reconstructing the crystal lattice and interface structure. Notably, the broadened layer spacing of O–Na–O and shortened TM–O bond are attributed to successful doping of V5+ into the bulk, accelerating the transmission of sodium ions and improving the structure stability. Concomitantly, the construction of a thin surface coating layer is beneficial for mitigating volume expansion and inhibiting structural degradation, which is validated by in situ X-ray diffraction coupled with the synchrotron X-ray absorption spectroscopy. Consequently, the rationally designed V-modified NFM cathode exhibits excellent cycling performances, exhibiting great capacity retention of 75.8% after 500 cycles at 2C in a half cell, and 85.6% capacity retention is observed after 150 cycles at 1C in the full cell. This work provides new insights into the development of O3-type layered oxide cathodes toward long-cycle life applications for large-scale energy storage systems.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Li-Feng Zhu,Bo-Ping Zhang,Shun Li,Gao-Lei Zhao
The (1- x )Bi 1+ y (Fe 0.96 Mg 0.02 Ti 0.02 )O 3 - x BaTiO 3 (abbreviated as B 1+ y FMT- x BT) system was designed to explore the morphotropic phase boundary (MPB) separating rhombohedral ( R ) and tetragonal ( T ) phases, and the mechanism of performance enhancement. The phase structure of samples was discreetly investigated by X-ray diffraction, and Rietveld refinement results of the XRD data revealed that the B 1+ y FMT- x BT ceramics consist of an R phase at x = 0.24, two R and T phases at 0.26 ≤ x ≤ 0.32, and a single T phase at x = 0.34. Because of the MPB and the improvement of resistivity with adding excess Bi compensation, excellent piezoelectric properties of d 33 = 198 pC/N and k p = 30.9%, as well as high Curie temperature T C = 497 °C were achieved in the B 1+ y FMT- x BT system at x = 0.30 and y = 0.02. Here, the large d 33 = 198 pC/N which is the maximum value for the BF-BT-Bi(Mg,Ti)O 3 system so far, and high T C = 497 °C suggest that Bi(Fe,Mg,Ti)O 3 -BaTiO 3 ceramics have good prospects in high-temperature piezoelectric devices.
研究领域:
材料科学
·
物理学
✓ 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）