Journal of Energy Storage
·
2023
·
IF 9.4
Yao Lu,Miaoyan Song,Jieyou Huang,Le Zhang,Binyu Zhao,Wenwei Wu,Xuehang Wu
Charging P2-type Na 0.66 Ni 0.33 Mn 0.67 O 2 (NNM) to a high upper cut-off voltage of 4.3 V (vs. Na + /Na) can yield a competitive discharge voltage (3.6 V-class) and capacity. However, achieving stable cycling for NNM under this condition remains challenging owing to an unfavorable phase transition and a large lattice-volume change. Herein, a dual-site doping strategy is used to simultaneously realize a pinning effect at the Na and transition metal sites. Incorporating pinned K + and Zn 2+ ions considerably enhances the structural stability of NNM, affording a complete single-phase reaction with ultralow strain (only 0.54 % variation in volume) during Na + insertion/extraction. The synergistic contributions of dual-site doping to the enhanced electronic conductivity , lowered Na + migration barrier, and increased Na + diffusion coefficients are confirmed via theoretical calculations. Consequently, the K + /Zn 2+ dual-site-doped Na 0.63 K 0.03 Ni 0.26 Zn 0.07 Mn 0.67 O 2 delivers satisfactory discharge capacities of 118.6 and 63.2 mAh g −1 at 10 and 2000 mA g −1 , respectively, and achieves an excellent capacity retention of 81.2 % after 200 cycles at 500 mA g −1 . This study provides a promising method to strengthen the stability of the Ni − Mn-based layered framework and optimize other high-voltage and high-capacity layered oxide cathode materials .
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Bao Zhang,Heng Wen,Keyi Xian,Na Lu,Chao Zheng,Zhiming Xiao,Xinyou He,Long Ye,Jiexi Wang,Lei Ming,Chunhui Wang,Xing Ou
Cobalt-free, nickel-rich layered oxides are attracting extensive interest as cathodes to construct high-energy and sustainable lithium-ion batteries, but the intrinsic structure instability and weakened reaction kinetics deteriorate their application. Nowadays, doping engineering, especially multielement doping, has become an effective modification method for obtaining high-performance Ni-rich materials. Herein, the designed doping strategy with high oxidation states element (Zr 4+ , Mo 6+ ) substituting transition metal element and Mg 2+ replacing Li + in LiNi 0.9 Mn 0.1 O 2 (NM-ZMM) has been designed to enhance its electrochemical properties. The introduced doping elements with high oxidation states can generate the strong metal-O bond, which contributes to suppress the structural collapse induced by internal stress, and then maintain unblock ion channels for NM-ZMM. Meanwhile, the presence of Mg 2+ can also be employed as the pillar ions to reinforce the structure stability, and occupy the Li-sites to inhibit lattice distortion during charging/discharging process. Thus, benefitting from the synergistic reinforcement of co-doping strategy, as-prepared NM-ZMM materials exhibit the prominent capacity retention (87.5 %, 210 cycles, 1C; 85.5 %, 2C, 150 cycles). Thereof, this creative strategy is crucial in strengthening the electrochemical performance of Ni-rich Co-free materials, which contributes to promote the development of high-performance and cost-effective Li-ion storage technology.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·Vol. 46
·期 55
·28134-28143
·
IF 5.816
Jisheng Yang,Kemin Zhang,Zhewen Ma,Xu Zhang,Tianping Huang,Subrata Panda,Jianxin Zou
Herein, a new type of trimesic acid-Ni based metal organic framework (TMA-Ni MOF) was synthesized and then, its derivative Ni@C was introduced into MgH 2 as destabilizer through high energy ball milling to prepare a Mg–Ni@C–H composite. X-ray diffraction analyses indicate the formation of Mg 2 Ni/Mg 2 NiH 4 as major phases after dehydrogenation/rehydrogenation of the composite, respectively. Two hydrogen absorption plateaus are observed in the Mg–Ni@C–H composite, corresponding to the hydrogenation of Mg and Mg 2 Ni, with the enthalpy change values of −75.8 and −52.3 kJ mol −1 H 2 respectively. Thus, it can be concluded that a destabilization effect is brought by Ni@C on thermodynamic properties of MgH 2 . In addition, the hydriding/dehydriding kinetics of MgH 2 is notably accelerated with the addition of Ni-based MOF derivative. The activation energy values of both hydrogen absorption and desorption are significantly lowered down with the assistance of Ni@C. Moreover, stable hydrogen de/absorption capacity and kinetics are remained during 25 cycles of high-rate re/dehydrogenation, which can be ascribed to the carbon-wrapped structure of the composite, with which the aggregation of the nanosized particles can be evidently avioded.
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Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 48
·24920-24927
·
IF 9.931
Dong-Cheng Liu,Li-Ming Cao,Zhi-Mei Luo,Di-Chang Zhong,Jing-Bo Tan,Tong-Bu Lu
Engineering efficient and cost-effective electrocatalysts for the oxygen evolution reaction (OER) is an essential part of electrochemical water splitting. Herein, we report the in situ preparation of an efficient OER electrocatalyst CoFePi/Ni(PO3)2 on carbon cloth (CC) by decorating amorphous CoFe phosphate (CoFePi) on crystalline nickel phosphate (Ni(PO3)2). The as-synthesized hierarchically heterogeneous electrocatalyst can be directly used as a working electrode for the OER without extra substrates or binders. Electrocatalytic studies showed that the CoFePi/Ni(PO3)2/CC electrode displays excellent OER catalytic activity and stability. A current density of 10 mA cm−2 during the OER process can be achieved at a low overpotential of 213 mV in 1.0 M KOH solution, comparable to the results reported for the most efficient OER electrocatalysts. The ultrahigh oxygen evolution activity and high durability are ascribed to the unique 3D hierarchical heterogeneous nanostructure and in situ generated amorphous–crystalline composite, as well as the highly conductive substrate of CC, which endows the composite catalyst with sufficient active sites, strong structural stability and good electrical conductivity. This strategy offers a new direction to fabricate high-performance electrocatalysts for the oxygen evolution reaction.
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APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Tianyi Huang,Jiajia Wu,Yongqi Pan,Zhiyuan Yu,Fangyu Zhao,Shafqat Ullah,Yang Xu,Yong Chen,Zhehao Sun,Zongyou Yin,Qiangqiang Xue,Sibudjing Kawi,Shuliang Lu,Yujun Wang,Guangsheng Luo
The hydrogenation of the C=C bond in α-β unsaturated aldehydes faces substantial difficulties due to the steric hindrance and the conjugation effects of macromolecular unsaturated aldehydes. Herein, we introduce a novel approach to prepare nanosheet-structured Ni-Al 2 O 3 catalysts featuring exposed {100} crystal planes and hydroxyl groups, utilizing a microfluidic system to easily control crystal plane growth achieve support modification. In-situ characterizations and DFT calculations reveal that the exposed {100} crystal plane, a strong metal-support interaction (SMSI) promotes electron transfer of Ni and significantly reducing the C=C hydrogenation energy barrier from 3.12 eV to 1.79 eV. The hydroxyl environment facilitates effective adsorption of the C=O bond, accelerating the reaction and enabling rapid desorption of the product. Under modified reaction conditions for the preparation of 2-ethylhexanol, the catalyst still achieved a yield of 99.9%. This simple method of support modification enables rapid large-scale preparation, possessing significant potential for industrial applications.
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高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2024
·
IF 5.3
Chenhao Huang,Kaiwen Zhang,Chenxi Zhang,Jing Yan,Hongyuan Fan,Lan Sun,Jun Wang
The extraction and transportation of oil and gas pose significant challenges due to corrosive environments, particularly hydrogen sulfide (H 2 S) exposure. This study investigates the use of polytetrafluoroethylene (PTFE) to enhance the corrosion resistance of nickel‑phosphorus (Ni P) coatings in H 2 S-rich environments. Electroless deposition was employed to prepare Ni-P/PTFE coatings, which were then subjected to simulated H 2 S corrosion tests. Results indicate that the incorporation of PTFE led to a more uniform Ni P coating with reduced porosity, significantly improving corrosion resistance. The coatings exhibited enhanced protective performance by stabilizing corrosion product layers and preventing the formation of corrosion channels. Ni-P-PTFE coatings overcame the existing research challenge of Ni P coatings' corrosion in H2S environments, showing no penetration of the corrosive medium into the substrate after 720 h of immersion. The corrosion rate of the coating is only 0.0261 mm/year, only 4.27 % of the corrosion rate of the L245NS substrate in the early stage of corrosion. Moreover, after characterization by SEM, XRD and XPS, it was found that the presence of PTFE altered the corrosion mechanism, promoting the formation of stable nickel sulfide and oxide layers on the surface. This study sheds light on the mechanisms underlying PTFE-enhanced corrosion resistance in Ni P coatings, offering promising implications for extending the lifespan of equipment in the oil and gas industry.
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CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2025
·Vol. 41
·期 2
·333-342
·
IF 3
Lin Huahui,Shen Yu,Wei Li,Song Ran,Wu Fan,Wei Peng,Yang Zhenzhong,Ren Yurong,Qu Ke,Ding Zhengping
Ultra-high nickel layered cathodes (Ni⩾95%) have emerged as prospective candidates for next-generation lithium-ion batteries (LIBs) due to their exceptional specific capacity and cost-effectiveness. However, the commercial application of these cathodes has been hindered by several challenges, including structural instability during cycling, high sensitivity to air, and slow Li + migration. In this research, a one-step modification strategy was developed to simultaneously achieve Mg doping and Li 3 PO 4 layer coating for the ultra-high nickel cathodes. Characterization results demonstrated that Mg doping not only alleviates lattice strain changes during the H2–H3 phase transition (H2: the second hexagonal phase; H3: the third hexagonal phase) but also serves as a structural anchor, preventing Ni 2+ migration and occupation within the Li layer. The Li 3 PO 4 surface coating layer acts as an electrochemical shield, protecting against interfacial side reactions and enhancing the Li + diffusion rate. As a result, the LiNi 0.95 Mn 0.05 O 2 cathode, with both internal and external modifications, demonstrates significant improvement in cycling stability (85.7% capacity retention after 100 cycles) and Li + transport performance (130.6 mA·h·g −1 at 10 C, 1 C=189.6 mA·h·g −1 ), providing a solid foundation for the further development and application of ultra-high nickel cathodes.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Zhi-Rong Li,Jing Liu,Jing-Yi Sun,Zhi-Yi Hu,Wan-Ying Li,Ting-Ting Shen,Mei-Tong Wei,Zhi-Wen Yin,Si-Ming Wu,Gustaaf Van Tendeloo,Yu Li,Bao-Lian Su
The Ni/Al layered double oxide (Ni/Al-LDO) is a promising photocatalyst because of the high surface area and abundant active sites. However, the application of Ni/Al-LDO for photocatalytic hydrogen evolution is hindered by the unclarity of the optimized microstructure and limited light absorption. In this work we report the structural evolution from Ni/Al layered double hydroxides (Ni/Al-LDH) to Ni/Al-LDO, which is able to achieve a precise regulation of the layered structure with abundant acid sites for photocatalysis. Further, CdS quantum dots (QDs) are in-situ grown on the sheet-like Ni/Al-LDO to obtain a close contact 0D/2D CdS-Ni/Al-LDO heterojunction. CdS-Ni/Al-LDO exhibits a hydrogen evolution efficiency of 20.3 mmol/g/h and an apparent quantum yield (AQY) of 22.2 % at a wavelength of 450 nm. The superior performance is attributed to the synergistic effects of abundant Lewis and Brønsted acid sites of Ni/Al-LDO, the layered structure with a high specific surface area and the heterojunction between Ni/Al-LDO and the CdS QDs.
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2025
·
IF 14.3
Xiaorui Wang,Lingxing Zan,Hongling Zhang,Kun Tian,Dan Zhu,Jian Li,Qiang Weng,Cuicui Wang,Qingbo Wei,Wenlin Zhang,Xiangyang Hou,Feng Fu
s Rationally regulating the inevitable dynamic evolution of the catalyst surface structure towards high efficiency for water electrolysis remains a significant challenge. Here, the ternary cobalt-iron-chromium double hydroxide (DH) was synthesized on nickel foam as a monolithic catalytic electrode (CoFeCr-DH/NF) for the oxygen evolution reaction (OER) via a simple electrodeposition technique. The optimized Co 0.7 Fe 0.3 Cr-DH/NF electrode exhibited remarkable catalytic activity and stability. The overpotential at the current density of 100 mA cm −2 is only 281 mV, far exceeding those of other monolithic catalytic electrodes. Furthermore, we elucidated the variations in the valence states of metals during the OER process and found the electrochemical oxidation of Co 2+ to Co 3+ and leaching of Cr. Importantly, Cr-leaching can induce surface reconstruction, which not only optimizes the surface electronic structure to enhance the intrinsic activity but also increases the surface irregularity to enlarge the electrochemically active surface area, thereby significantly improving the OER performance. Theoretical calculations revealed that OER preferentially occurred at the adjacent Cr-leached Co sites and confirmed that the Cr-leached trimetallic CoFeCr-DH performs an outstanding OER performance.
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高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 16
·7792-7800
·
IF 11.301
Tian Gan,Xinqiang Fan,Ye Liu,Chengyu Wang,Haoran Mei,Lijun Fan,Nianjun Hou,Yicheng Zhao,Yongdan Li
Ni/Ce0.8Sm0.2O1.9 (SDC) with a three-dimensionally ordered macroporous (3DOM) structure is prepared with poly(methyl methacrylate) as the template and characterized using X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, H2 temperature-programmed reduction, X-ray photoelectron spectroscopy and ultraviolet Raman spectroscopy. Lattice oxygen in 3DOM SDC shows a higher activity than that in hydrothermally synthesized bulk SDC. 3DOM SDC also exhibits a stronger interaction with Ni compared to bulk SDC, which facilitates the release of lattice oxygen and the formation of oxygen vacancies in SDC in a reducing atmosphere. Therefore, Ni/3DOM SDC shows a much higher catalytic activity for electrochemical oxidation than Ni/bulk SDC as the anode material of solid oxide fuel cells. With Ni/3DOM SDC as the anode, a cell supported by a 500 μm-thick SDC-carbonate composite electrolyte layer exhibits maximum power densities (Pmax) of 1.28 and 1.63 W cm−2 at 700 °C with H2 and methanol as fuels, respectively, more than twice the Pmax of a similar cell with a Ni/bulk SDC anode. The Ni/3DOM SDC anode also shows a high resistance to coking.
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Nano Research
·
2020
·Vol. 13
·期 4
·975-982
·
IF 8.183
Yan Xiaoxiao,Gu Minyi,Wang Yao,Xu Lin,Tang Yawen,Wu Renbing
Searching for inexpensive, efficient and durable electrocatalysts with earth-abundant elements toward the hydrogen evolution reaction (HER) is of vital importance for the future sustainable hydrogen economy, yet still remains a formidable challenge. Herein, a facile template-engaged strategy is demonstrated for the direct in-situ growth of Ni nanoparticles and N-doped carbon nanotubes on carbon nanorod substrates, forming a hierarchically branched architecture (abbreviated as Ni@N-C NT/NRs hereafter). The elaborate construction of such unique hierarchical structure with tightly encapsulated Ni nanoparticles and open configuration endows the as-fabricated Ni@N-C NT/NRs with abundant well-dispersed active sites, enlarged surface area, reduced resistances of charge transfer and mass diffusion, and reinforced mechanical robustness. As a consequence, the optimal Ni@N-C NT/NR catalyst demonstrates superior electrocatalytic activity with relatively low overpotential of 134 mV to deliver a current density of 10 mA·cm −2 and excellent stability for HER in 0.1 M KOH, holding a great promise for practical scalable H 2 production. More importantly, this work offers a reliable methodology for feasible fabrication of robust high-performance carbon-based hierarchical architectures for a variety of electrochemical applications.
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Transactions of the Indian Ceramic Society
·
2020
·
IF 0.952
Shifa Wang,Huajing Gao,Hong Yu,Peiying Li,Yanwu Li,Chaoli Chen,Yong Wang,Liang Yang,Zijuan Yin
MgAl2O4:M (M = Ti, Mn, Co, Ni) phosphors were successfully prepared by a modified polyacrylamide gel method. Calcination temperature and metal particle has significant effects on the phase transition, optical and color properties of Mg Al2O4: M phosphors. Ti, M n, Co and Ni metal particles introduced into the MgAl2O4 system can produce a variety of colours from white, grayish black, blue to turquoise blue. Mn, Co and Ni metal particles added into MgAl2O4 system can extend their light absorption to visible light range, while the Ti metal particles clad into the system did not improve significantly. Co metal particles appended into the MgAl2O4 system can cause fluorescence quenching of emission peak at 395 nm and enhancement of emission peak at 405 nm, while the Ti and Mn metal particles infused into the system can bring the enhancement of visible emission peak at 425 nm. The fluorescence quenching of the peak at 395 nm can be ascribed to the wavelength of Co metal particles matching the surface plasmon absorbance band of MgAl2O4:M phosphor. A reduction in emission intensity at 425 nm can be assigned to electron transfer from the conduction band (CB) of MgAl2O4 to the CB of metal particles causing non-radiative decay.
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