ACS Applied Materials & Interfaces
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2022
·
IF 10.383
Xueqian Ji,Yuxing Xu,Qing Xia,Yuncheng Zhou,Jiechen Song,Hailan Feng,Pengfei Wang,Jun Yang,Qiangqiang Tan
With the increasing demand for high energy density and rapid charging performance, Li-rich materials have been the up and coming cathodes for next-generation lithium-ion batteries. However, because of oxygen evolution and structural instability, the commercialization of Li-rich materials is extremely retarded by their poor electrochemical performances. In this work, Li-deficient materials Li0.3NbO2 and (Nb0.62Li0.15)TiO3 are applied to functionalize the surface of Li1.2Mn0.54Ni0.13Co0.13O2, aiming to suppress oxygen evolution and increase structural stability in LIBs. In addition, a fast Li-ion transport channel is beneficial to enhance Li+ diffusion kinetics. The results demonstrate that the electrodes decorated with Li0.3NbO2 and (Nb0.62Li0.15)TiO3 materials exhibit more stable cycling stability after long-term cycling and outstanding rate capability.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2021
·Vol. 168
·期 11
·110528
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IF 4.316
Liangjun Zhang,Li Xiao,Jiangfeng Zheng,Hua Wang,Han Chen,Yirong Zhu
Layered LiNixMn1−xO2 structures with high discharge specific capacity and low cost are anticipated as the next-generation of high-energy density cathode active materials. However, the mixed arrangement of Li+ and Ni2+ in the cathode materials affects structural stability. Here, Nb5+ was doped into the structure of LiNi0.8Mn0.2O2 (NM82) to broaden the lithium-ion migration channels and alleviate the degree of ion mixing. LiNbO3 particle was coated on the surface of LiNi0.8Mn0.2O2 to form a spherical compound and reduce the erosion of HF and the dissolution of transition metals, which helped ameliorate the cyclic and structural stabilities of cathode materials. NM82 modified 1% Nb2O5 (LN/NM82-1.0) exhibited maximum discharge specific capacitance (177.7 mAh g−1 at 1.0C following 200 cycles) and excellent thermal stability (189.0 mAh g−1 at 1.0C following 200 cycles at 60 °C). The corresponding capacity retentions of this material were 87.54% and 85.37%, as LiNbO3 particle coating on the surface of NM82 decreased polarization and charge transfer resistor. Nb5+ in the host structure suppressed structural degradation and enhanced discharge capacity. This study determined the influence of Nb5+ substitution and LiNbO3 cladding on the structure and surface of LiNi0.8Mn0.2O2 and provides insights into commercial application of high-energy density layered structures of LiNixMn1−xO2 cathode materials.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2022
·
IF 5.122
Sheng-Tong Wu,Fan Yang,Chun-Qin Zhao,Lai-Di Xu,Xue-Lian Han,Ping Chen,Shou-Nian Ding
Traditional photonic crystal microspheres have internal pores and can only be fabricated by self-assembly of colloidal nanoparticles . Therefore, their internal vulnerability to contamination and poor structural stability limit their further application. Therefore, we proposed a new method of photonic crystal composite microsphere fabrication by combining polymerisation with the self-assembly process. The droplets composed of colloidal nanoparticles, monomer , and initiator in continuous phase are obtained by a Shirasu porous glass (SPG) membrane emulsification undergo polymerised and self-assembled to obtain organic-inorganic photonic crystal composite microspheres. Since the self-assembled colloidal nanoparticles are immobilized in the polymer cross-linked network, the composite microspheres exhibit high structural stability. Based on this, we fabricated SiO 2 -PHEMA photonic crystal composite microspheres by polymerisation and self-assembly process. Compared with the pure SiO 2 photonic crystal microspheres fabricated by the same method, the composite microspheres exhibit high structural stability, color saturation, and good hydrophobicity due to the self-curling of the material driven by hydrogen bonding during polymerisation. In addition to the potential applications as dyes, biosensors, and in light, these composite microspheres overcome the difficulty of bulk generation of traditional photonic crystal microspheres and have the potential for industrialized mass production.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 30
·10472-10480
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IF 4
Pingping Teng,Ying Liu,Zhongqiao Sun,Hao Meng,Yide Han,Xia Zhang
Development of binary MOF-on-MOF heterostructures is a research hotspot in MOFs chemistry due to the advantages elicited by a closely connected interface, which may endow more abundant functionality and even broader applications in interface chemistry. A MOF-on-MOF heterostructure was constructed by in situ growth of MIL-88B on the outer surface of UiO-66. The resultant MIL-88B@UiO-66 produced had an interesting flower-like morphology composed of MIL-88B (petal) on tetrahedral UiO-66 (core). The MIL-88B@UiO-66 heterostructure showed adsorption and Fenton-like oxidation abilities, with distinctly improved structural stability in aqueous solution compared with that of single MIL-88B. Methylene blue (MB) was selected as the target molecule to evaluate the adsorption and Fenton-like oxidation activities. The efficiency of total removal of MB was studied systematically under various operating conditions and the influencing factors were optimized. The kinetics of adsorption and catalytic oxidation were simulated to explore the interactions between MB and MIL-88B@UiO-66. The mechanisms of enhanced adsorption and Fenton-like oxidation were suggested. The cyclic removal performance and structural stability of MIL-88B@UiO-66 were also determined.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESALINATION
·
2023
·
IF 9.9
Shasha Zhang,Rongli Fang,Le Zhang,Shunjiang Huang,Yanshuang Zhao,Yue Wang
Two-dimensional (2D) layer material MXene (Ti 3 C 2 T x ) is a promising electrode material in capacitive deionization (CDI) because of its advantages of large capacitance, high conductivity and abundant active sites. However, MXene nanosheets have a large number of metastable metal atoms, which are easy to react with dissolved oxygen and form metal oxides , resulting in structural instability and attenuation of electrochemical performance of MXene. Moreover, the inherent defects of MXene layered structure that are easy to stack, seriously limiting its application in CDI. In this paper, MXene fully coated by WS 2 antioxidant film with mesoporous structure was designed and successfully prepared by hydrothermal method to form a 3D mutually supported heterostructure , so as to improve the structural stability and CDI performance of MXene. The heterostructure performs abundant mesoporous, excellent electrical conductivity , good hydrophilicity and excellent cyclic stability. Therefore, the WS 2 @MXene composite demonstrates high specific capacitance (217.0 F g −1 ) and retention rate of 90.51 % after 1000 GCD cycles. The hybrid AC//WS 2 @MXene cell composed of AC anode and WS 2 @MXene cathode shows excellent desalination capacity (39.1 mg g −1 ). The retention rate of the cell is still 94.9 % after 40 desalting cycles, which is better than that of AC//MXene cell (84.4 %).
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Rui Zhang,Yihong Guo,Jianguo Yu,Sen Lin
Lithium/aluminum layered double hydroxide imprinted with SO 4 2- (ILDH) was prepared to enhance the lithium adsorption performance in low grade sulfate-type brines. The systematical characterization confirmed the ILDH had a morphology of two-dimensional lamella that was less randomly arranged than the traditional lithium/aluminum layered double hydroxide (TLDH). ILDH demonstrated a significantly enhanced adsorption performance in the long-term adsorption–desorption cycle replying on the excellent structural stability from the imprinting effects compared to TLDH. The adsorption capacity of ILDH was about 3.0 mg/g after 10 cycles, and the column experiments manifested that the Mg 2+ /Li + mass ratio could be significantly declined from 57.99 in the Yiliping sulfate-type brine to 2.36 in the desorption solution with 2.77 mg/g Li + adsorption capacity at room temperature .
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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2021
·Vol. 45
·期 10
·14720-14731
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IF 5.164
Yang Zhan,Qing Wang,Shao-Hua Luo,Si Li,Luo-Xuan Wang,Xin Liu,Ya-Hui Zhang,Long-Jiao Chang
Summary The lithium transition metal orthosilicates (Li 2 MnSiO 4 ) compounds are considered key materials for the next-generation lithium-ion batteries (LIBs). However, they exhibit poor electronic conductivity and structural stability. Herein, the dual-phase ( Pmn2 1 , and Pn ) coexisting Li 2 Mn 1− x Ni x SiO 4 @C is prepared successfully via a two-step calcination process to address the aforementioned problems. The orthorhombic Pmn2 1 and Pn phase are expected to bring well solid-state Li diffusion properties (D Li + ) and structural stability for electrode material, respectively. Also, the Ni doping and carbon coating are expected to raise electronic conductivity. Then, the electrochemical performance of LIBs utilizing LiMn 0.995 Ni 0.005 SiO 4 @C, LiMn 0.985 Ni 0.015 SiO 4 @C, and LiMn 0.92 Ni 0.08 SiO 4 @C (ZNi-02 to ZNi-04) as cathode materials are investigated and compared with that of the LiB using Li 2 MnSiO 4 @C (ZNi-01). The ZNi-04 sample-based LiB shows well D Li + and a peak discharge capacity as high as 188.4 mAh g −1 . In addition, the ZNi-04 sample can still maintain a capacity of about 80 mAh g −1 at rate of 8 C. Such excellent electrochemical performance is ascribed to the synergistic effect of the dual-phase coexistence, the proper amount of Ni doping, and surface coating of carbon, which enhances the electrical conductivity and structural stability. Thus, Li 2 Mn 1− x Ni x SiO 4 @C has broad application chances as a high-performance LIBs electrode material.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
Nano Research
·
2021
·Vol. 15
·期 4
·3143-3149
·
IF 8.897
Huang Ruling,Xue Qing,Lin Jiao,Zhang XiXue,Zhou Jiahui,Wu Feng,Li Li,Chen Renjie
Layered Mn-based oxides are one of the promising cathode materials for potassium-ion batteries (KIBs) owing to their high theoretical capacities, abundant material supply, and simple synthesis method. However, the structural deterioration resulting from the Jahn-Teller effect of Mn ions hinders their further development in KIBs. Herein, a novel Mn-based layered oxide, K 0.54 Mn 0.78 Mg 0.22 O 2 , is successfully designed and fabricated as KIBs cathode for the first time. It delivers smooth charging/discharging curves with high specific capacity of 132.4 mA·g −1 at 20 mA·g −1 and good high-rate cycling stability with a capacity retention of 84% over 100 cycles at 200 mA·g −1 . Combining in-situ X-ray diffraction (XRD) and ex-situ X-ray photoelectron spectroscopy (XPS) analysis, the storage of K-ions by K 0.54 Mn 0.78 Mg 0.22 O 2 is revealed to be a solid-solution processes with reversible slip of the crystal lattice. The studies suggest that the rational doping of inactive Mg 2+ can effectively suppress the Jahn-Teller effect and provide outstanding structure stability. This work deepens the understanding of the structural evolution of Mn-based layered materials doped with inactive materials during de/potassiation processes.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 16
·7863-7876
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IF 4.682
Liu Shixin,Du Mingrun,Ge Yanfeng,Li Zepeng,Srivastava Gyaneshwar P.,Wang Jinhua,Wei Tong,Zou Yunling,Li Xiaodong,Li Yanchun,Wang Mingchao
High entropy oxides are novel materials with diverse compositions that have received significant interest for their mechanical and photocatalytic properties. In this study, we enhanced the mechanical and photocatalytic performance of solid state fabricated high entropy oxide (La 0.2 Nd 0.2 Sm 0.2 Gd 0.2 Y 0.2 ) 2 Zr 2 O 7 through Eu doping. Samples doped with different Eu ion concentrations demonstrated good thermal stability under high temperature without phase transformation after sintering at 1500 °C. We performed high pressure X -ray diffraction measurements and found that bulk modulus and critical pressure were improved by approximately 30 GPa and 5 GPa, respectively. This significant compression difference confirmed that Eu doping enhanced structural stability under high pressure. (La 0.2 Nd 0.2 Sm 0.2 Gd 0.2 Y 0.2 ) 1.98 Eu 0.02 Zr 2 O 7 demonstrated the best photocatalytic performance, with a kinetic constant about 1.5 times that of undoped samples. The appropriate doping concentration, smaller grain size and wider light absorption range contribute to the better photocatalytic performance irradiated under UV light. This work provides valuable insights for the design and improvement of high entropy oxide mechanical and photocatalytic performance. Graphical abstract
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
CHINESE CHEMICAL LETTERS
·
2025
·
IF 8.9
Weijie Yi,Huijun Li,Mingyang Gao,Zirun Chai,Xiaomin Wang
O3-layered oxides are considered promising for various applications due to their high capacity. However, these O3-type materials are prone to undergo an irreversible O3-P3 phase transition, which adversely impacts their structural stability. Elemental doping has been identified as an effective strategy to mitigate this issue. However, substituting Cu at the redox center reduces the capacity of the pristine material. The unique introduction of the Sb element reduces the lattice oxygen ratio, leading to a significant increase in initial capacity. Thus, the Cu/Sb co-doped material NaNi 0.37 Mn 0.49 Cu 0.13 Sb 0.01 O 2 (NNMCS) with unique O3-dominated phase transition process, was successfully prepared using the high temperature solid-phase method. Cu/Sb doping increases Mn⁴⁺ concentration through the charge compensation mechanism at transition metal sites, mitigating the negative structural effects of the dual simplicial state e g orbitals in the high-spin Mn³⁺ state. Doping with Cu/Sb increases the electron cloud density at the transition metal sites, enhancing the electron shielding effect and ultimately causing the distance between the transition metal sites to expand. The increased distance between the transition metal sites indirectly promotes flexibility during transition metal migration, resulting in electrode materials with a smaller rate of lattice parameter change during cycling and ultimately enhancing phase transition reversibility. As a result, NNMCS demonstrates a high initial specific capacity of 188 mAh/g and 78% capacity retention after 200 cycles at 1 C within a 2.0–4.3 V window. This work provides valuable insights into the coupling mechanism between capacity and structural stability in layered oxides for sodium-ion batteries.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Yuan Wang,Qinfeng Zheng,Yuepeng Pang,Yixiao Zhang,Tao Yuan,Shiyou Zheng
Prussian blue and its analogues (PBA) are promising cathode materials for economical large-scale sodium-ion batteries (SIBs). Manganese-based PBA, abbreviated as “PW”, offers advantages such as high voltage, high capacity, and good cost-effectiveness but faces challenges with manganese dissolution and structural distortion during cycling. In contrast, iron-based PBA, abbreviated as “PB”, maintains more stable structural integrity but exhibits relatively lower capacity. In this study, we introduce an ion-exchange technique to create core-shell structural cathode materials with PW as the main active ingredient and PB as the protective shell (PW@PB). This approach achieves more than doubled capacity retention after 500 cycles compared to naked PW. Furthermore, PW@PB demonstrates notable rate capability enhancements, retaining 80 % of its capacity at 0.1C when subjected to a high rate of 10C, proving its potential for use in fast-charging SIBs. The improved performance is primarily attributed to the reduced lattice and bound water in the structure of PW@PB. Additionally, the stable outer layer of PB inhibits the leaching of Mn and Fe, minimizing lattice distortion during the charge-discharge process.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Xi Ouyang,Manwen Yao,Tongqing Yang,Xi Yao
The significance of temperature stability in piezoelectric materials is crucial as it directly impacts their reliability and consistency in piezoelectric performance under varying temperature conditions. However, the relationship between structural stability and temperature stability remains ambiguous. In this study, we aim to address this issue by constructing piezoceramics with low and high structural stability using the “high configurational entropy” (Pb (Ni0.11Hf0.33Ti0.34Nb0.22) O3) strategy and “tolerance factor” (Pb (Ni0.11Hf0.21Ti0.46Nb0.22) O3) strategy. The relationship between structural stability and temperature stability was then explored through temperature-dependent XRD, Raman, and piezoelectric property tests in the range of 25–250 °C. Our results successfully demonstrate a positive correlation between structural stability and temperature stability. The microstructure information analyzed by temperature-dependent XRD and Raman showed that Pb (Ni0.11Hf0.33Ti0.34Nb0.22) O3 has a more abundant phase structure transition and higher ion disorder, which is directly reflected in its poor temperature stability in the piezoelectric property tests. On the other hand, Pb (Ni0.11Hf0.21Ti0.46Nb0.22) O3 exhibited excellent temperature stability due to its stable phase structure and lower ion disorder. Specifically, the unipolar strain of piezoceramics with low structural stability decreases from 1.63% at 25 °C to 0.24% at 200 °C, while the unipolar strain of piezoceramics with high structural stability only changes from 0.78% at 25 °C to 0.79% at 225 °C. Additionally, our understanding of the high energy barrier imposed by a wide band gap, as well as the hindrance of domain switching and stabilization of domains through the pinning effect of defect dipoles, reveals the underlying mechanism of temperature stability. These findings provide a promising approach to the development of piezoceramics that can effectively function across a wide range of temperatures.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）