Nanoscale
·
2025
·Vol. 17
·期 11
·6570-6579
·
IF 5.1
Haotian Gong,Baiyao Gan,Xinkang Li,Ting Long,Biaobing Chen,Li Zou,Tong Zhou,Ziyang Ma,ZhiYe Yuan,Jiang Yin,Yahui Yang,Lishan Yang
Na-based layered transition metal oxides with an O3-type structure are considered as promising cathode materials for sodium-ion batteries (SIBs) due to their low cost, wide two-dimensional ion channels and high theoretical specific capacity. However, during storage, exposure to moisture and carbon dioxide in the air results in the formation of increased residual sodium compounds. This degradation exacerbates side reactions with the electrolyte and induces structural collapse, ultimately impairing their electrochemical performance. In this study, two titanium sources (e.g., itanium dioxide nanopowders and tetrabutyl titanate ethanol solution) were applied separately to develop two kinds of Na2Ti3O7 coatings via the reactions between the titanium sources and the residual alkaline species on the O3-Na0.95Ni1/3Fe1/3Mn1/3O2 particle surface. Both two Na2Ti3O7 coatings could effectively enhance the electrolyte wettability and Na+ conductivity of the coated cathodes, along with reducing the dissolution of transition metals during cathode cycling. In particular, the tetrabutyl titanate-derived Na2Ti3O7 coatings (5–8 nm) on O3-Na0.95Ni1/3Fe1/3Mn1/3O2 cathodes realized excellent kinetics (101.9 mA h g−1 at 10C) and optimal cycling stability (85.66% retention over 200 cycles at 1C). These findings demonstrate that the ultrathin Na2Ti3O7 coating strategy effectively enhances layered oxide cathode performance through interface engineering, offering a promising approach for developing air-stable cathodes and emerging as a pivotal technology to advance sodium-ion battery applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 38
·13405-13414
·
IF 7.059
Zhi-Gang Liu,Zhen-Hua Tang,Song-Cheng Hu,Di-Jie Yao,Fei Sun,De-Yang Chen,Xiao-Bin Guo,Qiu-Xiang Liu,Yan-Ping Jiang,Xin-Gui Tang
Progress in energy storage ceramics for applications has been of interest owing to their clean green nature and excellent ferroelectric/dielectric performances. In this study, lead-free Sm-doped 0.95BaTiO3–0.05Bi(Mg0.5Ti0.5)O3 (BT–BMT–xSm) relaxor ferroelectric ceramics were synthesized and confirmed to be an appropriate material for storage devices. After the introduction of Sm2O3 into BT–BMT ceramics, their hysteresis loops gradually shrank and became slender, which is beneficial to achieving high efficiency energy storage in ceramic capacitors. The maximum recoverable energy density for the BT–BMT–xSm (x = 0.03) sample reached 3.86 J cm−3 at normal temperature, and its corresponding energy efficiency reached 81.6%. Moreover, it was found from impedance spectroscopy that the breakdown field strength is related to the oxygen defect content in the samples. Ceramic samples with fewer defects have better insulation performance, which means that a high breakdown field strength will be obtained. With proper doping, enhanced relaxor behaviour and breakdown field strength were obtained to achieve excellent energy storage properties.
研究领域:
材料科学
·
能量存储
·
陶瓷
·
铁电材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Zhongshuai Zhang,Yuqing Liu,Zixi Liu,Hailin Li,Yaoliang Huang,Weijian Liu,Dingshan Ruan,Xin Cai,Xiaoyuan Yu
O3-type Fe/Mn-based layered oxides are considered as the competitive cathode materials for sodium-ion batteries because of environmental friendly metal elements and low cost. However, a lower capacity, poor cycling stability and irreversible phase transitions hinder their commercial application. Herein, the Cu-doped O3 biphasic Na[Mn 0.6 Fe 0.4 ] (1- x ) Cu x O 2 (NFMCu- x ) layered oxides are successfully synthesized by high temperature calcination using Fe/Mn-based Prussian blue analogues as precursor. The results indicate that the different stoichiometric of Cu 2+ substitution in P2 NaMn 0.6 Fe 0.4 O 2 can cause the transformation of P2 phase to O3 monophase or O3 biphase. The NFMCu- x samples exhibit O3 monophase at x = 0.1, 0.15, while O3 biphase coexists in the compound at x = 0.2, 0.25, and 0.3. Benefiting from the synergetic effect of Cu-doping and O3 biphasic structure, the optimized O3 biphasic NaMn 0.48 Fe 0.32 Cu 0.2 O 2 exhibits a high Na + diffusion coefficient and an excellent sodium storage performance with a high discharge specific capacity of 103.76 mAh g −1 at 24 mA g −1 and good capacity retention of 82.9% after 100 cycles. Moreover, Cu-doped O3 biphasic NaMn 0.48 Fe 0.32 Cu 0.2 O 2 features an excellent air stability. Thus, this work proposes a strategy in development of O3 Fe/Mn-based layered oxide as high-performance cathode materials for sodium-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
固态化学
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry Letters
·
2024
·
IF 4.8
Yanchang Wang,Yao Xiao,Jiangnan Huang,Chunxiao Zhang,Kentaro Yamamoto,Yoshiharu Uchimoto,Weifeng Wei,Hongshuai Hou,Datong Zhang,Xiaobo Ji
For cathode materials of sodium-ion batteries, O3-type Ni/Fe/Mn-based (Na-NFM) layered oxides have garnered extensive attention because of high economic viability, environmental friendliness, and the potential for high energy density. Among them, Fe-rich compositions exhibit higher initial charge capacity and lower bill-of-material costs, while they fade rapidly and exhibit low initial coulombic efficiency, hindering their commercialization prospects. In this work, we investigate the failure of Fe-rich Na-NFM materials through X-ray absorption spectroscopy methods. The results reveal a combined failure mechanism that encompasses not only the conventional theory of Fe migration but also an abnormal Ni-redox deterioration, which has not yet been reported. More factors related to the failure of Fe-rich Na-NFM layered oxides are discussed in detail. These findings are expected to inspire targeted research efforts toward Fe-rich Na-NFM materials, thereby accelerating the practical application of sodium-ion batteries.
研究领域:
材料科学
·
电化学
·
固态化学
·
储能
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2015
·
IF 2.947
Xuechen Huang,Hanxing Liu,Zhe Song,Hua Hao,Wenqin Zhang,Qi Xu,Chuyu Peng,Ling Huang,Minghe Cao
Dense (1 − x )BaTiO 3− x (Na 1/4 Bi 3/4 )(Mg 1/4 Ti 3/4 )O 3 [(1 − x )BT– x NBMT] polycrystalline ceramics were prepared by solid-state reaction method. The detailed structure analysis was performed by X-ray diffraction (XRD) and Raman spectroscopy , confirming that the Ba and Ti sites were partially replaced by Na + /Bi 3+ and Mg 2+ ions, respectively. An obvious structural variation from tetragonal to pseudocubic was observed for sample with x = 0.08–0.12. The lattice parameter for sample with x ≥ 0.12 decreased linearly with x value. Three changing modes in frequency, width and intensity were observed with x value in the Raman spectra, indicating intense changes of local structure, accounting for evolved dielectric and ferroelectric macroscopic properties. The subgrain microstructures were observed by conventional transmission electron microscopy (TEM) imaging with an energy-dispersive X-ray spectroscopy (EDS) attachment. A large number of core–shell grains were detected by TEM dark field, for x = 0.20, which were attributed to the dissolution–precipitation mechanism. In this present study, (1 − x )BT– x NBMT ceramics are considered promising for high temperature capacitor applications.
研究领域:
材料科学
·
陶瓷
·
介电与铁电材料
·
固体化学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Li Siwen,Lin Yingzi,Wang Gaoqi,Zhu Suiyi,Liu Gen,Shi Chunyan,Chen Lei
This study researched the formation of disinfection by-products (DBPs) in sulfamethazine (SMZ) chlorination after preoxidation by K2FeO4 and O3 and the influence of preoxidation on cytotoxicity and biological toxicity. Then, the study emphatically analyzed the influencing factors such as NaClO dosage, pH value, reaction temperature, fulvic acid (FA), and bromide and iodide ions. The results showed that preoxidation by K2FeO4 effectively inhibited the formation of DBPs of haloketones (HKS) and trihalomethanes (THMs), with an average inhibition rate of over 60%. The formation of DBPs after preoxidation by O3 was higher than that by K2FeO4; preoxidation by K2FeO4 reduced the influence of NaClO dosage, temperature, and pH value on the production of DBPs after SMZ chlorination. The cytotoxicity and biological toxicity of SMZ chlorination after preoxidation were evaluated and compared by calculating the LC50 value of DBPs and the luminescent bacteria method. The results of both calculation methods showed that the toxicity of DBPs after preoxidation by K2FeO4 was lower than that by O3 preoxidation. K2FeO4 and O3 preoxidation improved the SMZ removal efficiency by 8.41 and 10.49%, respectively, and inhibited the formation of most DBPs, but the preoxidation promoted the formation of highly toxic DBPs (HANs). The toxicity of DBPs formed in SMZ chlorination after preoxidation by K2FeO4 and O3 was slightly higher than that of chlorination disinfection alone, but it was still within the safe range. This study provides more new details about the formation and toxicity changes of DBPs in the process of SMZ chlorination after preoxidation.
研究领域:
环境科学
·
毒理学
·
水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2024
·
IF 5.9
Yixuan Zhang,Guo-Qiang Liu,Chang Su,Danlei Qiao,Xiaojing Xu,Jiaguan Chen,Guang-Yin Liu,Qiang Sun,Lei Wen
Layered oxides are the widely investigated cathodes for sodium-ion batteries (SIBs), especially their pure phases (e.g., P2, O3). In this work, we report a series of Mn-Ni-Fe based cathode materials with P2/O3 bi-phase, which possesses advantages of both P2 and O3 structures. At first, the manuscript shows a synthesis phase diagram of Na 0.83 Mn x Ni y Fe 1-x-y O 2 to pre-screen and select the P2/O3 bi-phase material Na 0.83 Mn 1/2 Ni 1/3 Fe 1/6 O 2 . Then, it is found that the cationic ratio has a significant impact on the phase formation. The structure of the materials gradually changes with the various of the Mn/Ni ratio. When the Mn/Ni ratio reaches 3/2, P2/O3 bi-phase is formed. Moreover, Fe content will influence the P2/O3 ratio in the bi-phase material. In particular, the synthesized bi-phase Na 0.83 Mn 3/6 Ni 2/6 Fe 1/6 O 2 has a P2/O3 ratio of 71/29 wt%. It delivers a high specific capacity of 136.6 mA h g −1 (at current density 20 mA g −1 ) between 2.0 and 4.0 V and 94.8% retention (at current density 100 mA g −1 ) after 100 cycles. In addition, an 85.6 mA h g −1 discharge capacity can be maintained at a superior high current density of 2000 mA g −1 . The work offers critical guidance to the rational design of the bi-phase layered cathode materials.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 46
·2509099
·
IF 19
Yichen He,Yonglin Huo,Maowen Xu,Yuruo Qi
Layered cathode materials for sodium ion batteries (SIBs) have garnered significant attention due to their high theoretical capacity and tunable crystal structure. However, they still confront severe structural attenuation at high voltages, especially those undergoing anionic redox reactions. To mitigate these limitations and elucidate the underlying mechanism, herein, a biphasic cathode material, Na 0.67 Fe 0.3 Mn 0.5 Li 0.1 Mg 0.1 O 2 , comprising 76.6% P2 and 23.4% O3 phases is proposed. The “Na─O─Mg” structure with robust Mg─O bonds enhances oxygen redox activity but also suppresses lattice oxygen evolution at elevated voltages, enabling a high initial discharge capacity of 187.8 mA h g⁻¹ at 0.1C. Moreover, the biphasic structure suppresses O/P structural rearrangement and mitigates harmful phase changes via forming OP2 phase at high-voltage, resulting in excellent cycling stability with a capacity retention of 96.6% after 100 cycles at 1C within an extended voltage window of 1.8–4.3 V. These findings deepen the understanding in the interlocking effect of biphasic materials and offer valuable insights for designing high-performance cathode materials.
研究领域:
材料科学
·
电化学
·
能量存储
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 47
·2505824
·
IF 19
Guoyao Pang,Yang Gu,Haoxiang Zhuo,Meng Li,Kuan Wang,Jian Wang,Dongniu Wang,Jiangtao Hu,Biwei Xiao,Weidong Zhuang
The synthesis process of layered oxide cathode materials is pivotal yet underexplored in sodium-ion battery (SIB) research. This study systematically investigates the phase construction mechanisms of O3-structured NaNi 1/3 Mn 1/3 Fe 1/3 O 2 (NMF) through in situ heating XRD, synchrotron-based STXM, and electrochemical analysis, focusing on decomposition, diffusion, phase transformation, and oxidation steps during the synthesis. Three precursors—co-precipitated hydroxides, micrometer-sized metal oxides (MO), and nanometer-sized oxides (sand-milled metal oxides, SMMO)—are compared, alongside sodium sources (Na 2 CO 3 , NaOH, NaHCO 3 ). Hydroxide precursors enabled a direct P3-to-O3 solid-solution transition via homogeneous Na-ion diffusion, yielding uniform structures and superior electrochemical performance (131 mAh g −1 discharge capacity). In contrast, MO precursors exhibited stepwise phase evolution: Mn 2 O 3 initiated P3 formation at 425 °C, Fe 2 O 3 promoted O3 nucleation at 675 °C, and NiO finalized the transition at 800 °C, albeit with residual impurities. Reducing precursor size (SMMO) delayed phase onset temperatures but retained diffusion-controlled pathways. Sodium source decomposition kinetics critically influenced phase transitions: NaOH accelerated O3 formation at lower temperatures, while NaHCO 3 delayed P3-O3 conversion. STXM revealed heterogeneous oxidation states in oxide-derived samples, correlating with sluggish diffusion and inferior cycling stability. This work establishes that precursor uniformity and sodium source selection govern diffusion homogeneity, phase purity, and electrochemical behavior.
研究领域:
材料科学
·
电化学
·
储能技术
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Lei Xiao,Qiang Li,Lianwen Deng,Sen Peng,Tulin Yi,Weichun Liu
Ba 1- x K x (Zn 1/3 Nb 2/3 )O 3- x /2 (BKZN, x = 0–0.2) ceramics were prepared by the high-temperature solid-state reaction method. Based on P–V–L theory, Raman vibration spectroscopy and X-ray photoelectron spectroscopy (XPS), this paper investigates the relationship between the internal and external factors of K + substitution in the Ba(Zn 1/3 Nb 2/3 )O 3 (BZN) ceramics and the microwave dielectric properties of the ceramics. X-ray diffraction (XRD) characterisation revealed that all samples were single phase with no impure phases. Replacing Ba 2+ with K + greatly reduced the sintering temperature and optimised the microwave dielectric properties of the ceramics. The dielectric constant ( ε r ) was closely related to the ion polarizability and density, and inversely proportional to Raman shift of the A 1g (O) peak. The quality factor ( Q × f ) depended largely on the lattice energy ( U b ) and the full width at half-maximum (FWHM) of A 1g (O) near 790 cm −1 . The temperature coefficient of the resonance frequency ( τ f ) could be inferred from the bond energy ( E b ) and oxygen octahedral distortion. Finally, outstanding microwave dielectric properties ( ε r = 40.83, Q × f = 71,658 GHz and τ f = 2.52 ppm/°C) were acquired for Ba 0.95 K 0.05 (Zn 1/3 Nb 2/3 )O 2.975 ceramics sintered at the optimum sintering temperature (1325 °C) for 4 h.
研究领域:
材料科学
·
陶瓷
·
微波介电材料
·
固态化学
·
光谱学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Fang-Ze Han,Yu-Fei Wan,Cheng-Xin Li,Shan-Lin Zhang
The development of solid-oxide cells requires fuel electrodes capable of promoting highly catalytic activities for CO 2 electrochemical reduction (CO 2 R). This study develops a fuel electrode material, Sr(Ti 0·3 Fe 0·63 Ru 0.07 ) O 3-δ (STFR) perovskite, enhance with in-situ exsolved Fe–Ru nanoparticles (STFR–FeRu), demonstrating excellent electrochemical catalytic activity for CO 2 R, considerable stability, and high selectivity for CO 2 electrolysis. Notably, the study discovered for the first time that STFR–FeRu exhibits significantly enhanced catalytic activity in a CO 2 -containing atmosphere compares to that in hydrogen-based fuels. At 800 °C and 1.3 V, La 0·8 Sr 0.2 Ga 0.8 Mg 0·2 O 3-δ electrolyte-supported cells with STFR–FeRu fuel electrode, for direct CO 2 electrolysis, realizes a current density of 1.77 A cm −2 . This current density is 50 % higher than that of H 2 O electrolysis under the same conditions. Additionally, the cell achieves a current density of 1.54 A cm −2 for CO 2 –H 2 O co-electrolysis, with a high CO 2 electrolysis selectivity (CO concentration exceeding 60 % in the electrolysis products).
研究领域:
材料科学
·
电化学
·
能源材料
·
催化
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2019
·
IF 0
Pingfeng Fu,Lianghua Wang,Yanhong Ma,Zongwu Hou
To separate sulfide minerals from ores, xanthates are widely used as flotation collectors in global mining industry. However, nearly half of xanthates dosed into flotation circuits are discharged into flotation effluents. Residual xanthates and byproducts must be removed because of their toxicity to animals and detrimental effects on mineral flotation. In this work, the degradation of ethyl xanthate (EX) collector by O 3 , UV 254nm , UV 185+254nm , O 3 /UV 254nm and O 3 /UV 185+254nm was compared. The TOC and SO 4 2− concentrations were measured to study the mineralization of EX. The generation of CS 2 and H 2 S byproducts was investigated in both aqueous and gaseous phases. The degradation rate and mineralization extent of EX had the order O 3 /UV 185+254nm >O 3 /UV 254nm >UV 185+254nm >UV 254nm >sole O 3 . The EX removal by O 3 /UV 185+254nm reached 99.13 % within 15 min with the half-life of 2.29 min. The higher solution pH promoted the EX degradation for the O 3 /UV 185+254nm and sole O 3 . After 90 min, 1.72 % of total sulfur in EX had emitted into gas for the O 3 /UV 185+254nm , slightly higher than that (0.49 %) for sole O 3 . The solid phase extraction and gas chromatography‒mass spectrometry (SPE/GC–MS) and UV–vis spectroscopic analysis revealed that 13 organic byproducts were generated from EX collector and most of them could be further decomposed by O 3 /UV 185+254nm . Because the O 3 /UV 254nm and UV 185+254nm photolysis were included, the O 3 /UV 185+254nm was the most efficient process in the removal and mineralization of xanthate collectors among five processes.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
危险品化学品经营许可证（带存储）