INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Chenlu Xue,Haipeng Jiang,Chenchen Zhu,Wei Gao
AlH 3 is a promising hydrogen storage material, but poses an explosion risk when suspended in air. Herein, a low-cost and environmentally friendly composite explosion suppressant is prepared using ultrasound coupled cooling crystallization and applied to suppress AlH 3 explosions. Ultrasound-induced cavitation inhibits crystal agglomeration, resulting in fine KH 2 PO 4 crystals growing on the SiO 2 surface by heterogeneous nucleation, which significantly improves the suppression effect. The decomposition products of KH 2 PO 4 react with the flame radicals in the system to generate stable products, interrupting the chain reaction of flame radicals effectively. Furthermore, the complex mesoporous structure of SiO 2 absorbs flame radicals and increases the collision probability between the radicals and the pore walls, thus suppressing flame propagation. Our research provides an important theoretical support for the safe application of light metal hydrogen storage materials.
研究领域:
材料科学
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能源存储
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安全工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry Letters
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2020
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IF 6.71
Lei Meng,Chen He,Wei Ji,Fei Yen
We observe sharp step-down discontinuities in the magnetic susceptibility of NH4H2PO4 and NH4H2PO4-d60 (60% deuterated) along the a- and c-axes occurring exactly at their antiferroelectric transition temperatures. For the case of KH2PO4, less pronounced discontinuities occur at the ferroelectric transition temperature. To explain this, we treat the acid protons as individual oscillators that generate current elements that translate to magnetic forces in near resonance with each other. With decreasing temperature, the resonant forces become more commensurate, which amplifies a disproportionate drop off of two types of magnetic forces to eventually trigger the structural phase transitions. For the case of NH4H2PO4, the associated internal magnetic field appears to aid the NH4+ to order at a higher temperature. At 49 K, a shoulder-like anomaly in both NH4H2PO4 and KH2PO4 is attributed to a possible onset of macroscopic quantum tunneling of protons. Our findings bring forth a new category of intrinsic multiferroic systems.
研究领域:
凝聚态物理
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材料科学
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固态物理
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磁学
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铁电学
✓ 已验证
DOI
高影响因子
ACTA MATERIALIA
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2024
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IF 8.3
Jinping Mu,Xiaohui Li,Rui He,Lijing Sun,Xue Bai,Lihui Zhang,Xi Zhang,Zhenfa Liu,Jing Gao,Aijia Wei
High-voltage (5-V) lithium–ion batteries (LIBs) have garnered substantial interest due to their superior energy density. Nevertheless, the unstable interphase of high-voltage LIBs can cause electrolyte decomposition, electrode collapse, transition metal dissolution, and lithium dendrite growth during cycling, which impedes their widespread commercial use. To mitigate these challenges, various alkali-metal phosphates were incorporated into a carbonate-based electrolyte as film-forming additives, aiming to improve the electrochemical performance of LiNi 0.5 Mn 1.5 O 4 (LNMO)-based LIBs. Following a detailed comparison of the electrochemical performances of various alkali-metal phosphates, KH 2 PO 4 and NaH 2 PO 4 were selected for an in-depth investigation in this research. The highly protective passivation film generated by KH 2 PO 4 and NaH 2 PO 4 on the electrode surface provided significant protection by effectively inhibiting continuous electrolyte decomposition. This finding was supported by density functional theory calculations and a variety of electrochemical and characterization tests. The H 2 PO 4 − primarily contributed to the formation of the cathode electrolyte interphase film on the cathode surface. KH 2 PO 4 (via the electrostatic shielding effect of K + ions) and NaH 2 PO 4 (through the co-precipitation of Na + and Li + ions) both effectively inhibited the growth of lithium dendrites on the lithium metal anode. Additionally, the KH 2 PO 4 and NaH 2 PO 4 additives regulated the amount of HF in the electrolyte through acid–base equilibrium reactions. The electrolytes containing additives significantly enhanced the electrochemical performances of Li||Li, LNMO/Li, LNMO/graphite, and LNMO/Li 4 Ti 5 O 12 cells. LNMO/Li half-cells with standard electrolyte (STD) supplemented with KH 2 PO 4 and NaH 2 PO 4 additives demonstrated capacity retentions of 92.9 % and 90.0 % after 500 cycles at 5 C, respectively, in contrast to only 79.4 % for the STD electrolyte alone. Furthermore, the LNMO/graphite full cell exhibited an increased capacity retention, reaching 81.1 % (STD+KH 2 PO 4 ) and 78.29 % (STD+NaH 2 PO 4 ), up from 70.8 % with the STD, after 100 cycles at 0.5 C. Given their ease of use, affordability, and widespread availability, KH 2 PO 4 and NaH 2 PO 4 additives show significant potential to enhance the electrochemical properties of high-voltage LIBs.
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 THERMAL ANALYSIS AND CALORIMETRY
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2025
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IF 3.1
Yu Ziming,Han Zhiyue,Zhang Xinrui,Li Zerui,Tong Wenchao,Ding Jianxu
This study investigates the explosion suppression mechanism of a novel composite deflagration inhibitor (SK), synthesized from industrial waste blast furnace slag (S105) and KH 2 PO 4 , for the suppression of aluminum dust explosions. By employing a liquid-phase chemical coating method, SK integrates S105 (a low-cost, high-strength matrix) and KH 2 PO 4 (a chemically active carrier) into a core–shell structure, achieving synergistic suppression effects. Explosion suppression effect were evaluated using a dual-channel 20 L spherical explosion vessel and a Hartmann tube, revealing that SK reduced the maximum explosion pressure by 23.9%, the pressure rise rate by 70.7%, and the flame propagation speed by 67.3%. These results indicate that SK outperforms individual components (S105 and KH 2 PO 4 ) as well as conventional inhibitors (e.g., NaHCO 3 ). Thermogravimetry–differential scanning calorimetry (TG–DSC) and microstructure characterization techniques, such as scanning electron microscopy (SEM) and X-ray diffraction (XRD), elucidate the dual inhibition mechanisms: (1) Physical inhibition, through endothermic decomposition and release of H 2 O to dilute oxygen and form a physical barrier; (2) Chemical inhibition, which suppresses explosions by scavenging radicals and terminating chain reactions. S105 is more cost-effective than its components, primarily due to the ultra-low cost of slag. This work not only promotes the sustainable use of industrial waste resources but also provides a scalable and efficient solution for industrial explosion safety, aligning with global circular economy goals.
研究领域:
安全工程
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燃烧科学
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材料科学
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工业安全
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废弃物资源化利用
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Chenlu Xue,Haipeng Jiang,Jiafeng Cheng,Wei Gao
Safe production and widespread application of AlH 3 are limited by unstable hydrogen evolution and explosion risk. Alkali (earth) metal compounds, A(E)MCs, are promising materials for inhibiting AlH 3 explosions due to abundant reserves, low toxicity, and environmentally friendly. Currently, systematic evaluation of explosion inhibition effect (EIE) and understanding of inhibition mechanism is lacking. This study examines the inhibition behavior of 16 A(E)MCs for AlH 3 explosions using thermal properties of A(E)MCs to select inhibitors, and EIE of different groups on AlH 3 is analyzed. Notably, KH 2 PO 4 effectively reduces explosion intensity to 0.53 MPa·m/s, with the maximum pressure and maximum pressure rise rate of 0.68 MPa and 4.63 MPa/s. EIE can be quantitatively described by relative changes in particle Al 2 O 3 , and preventing the formation of particle Al 2 O 3 can be effective in improving EIE. Combining characterizations and simulation results reveals that A(E)MCs inhibit AlH 3 explosions in both chemical and physical ways. Further, the synthesized composite inhibitor KH 2 PO 4 /SiO 2 , which adsorbs flame radicals, reduces explosion intensity by 92.23 % and enhances EIE by 4.33 %. We hope our work can provide theoretical support for the safe application of hydrogen storage materials and the quantitative assessment of EIE.
研究领域:
材料科学
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安全工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2023
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IF 6
Yuting Wu,Yadong Wang,Peiao Chen,Yang Yang,Ziyue Tang,Yingquan Chen,Haigping Yang,Hanping Chen
In order to reduce nitrogen emissions during municipal sewage sludge (MSS) pyrolysis, the effects of co-pyrolysis of MSS with biomass and the second adsorption of KH 2 PO 4 -modified biochar were investigated. It was found that co-pyrolysis with cellulose inhibited the conversion of nitrogen into pyrolytic gas, and increased the N content in pyrolytic biochar. And the nitrogen fixation rate increased with cellulose addition increasing. Besides, compared with different biomass, MSS co-pyrolysis with 30% sugarcane bagasse had the optimal effect on nitrogen fixation (39%). Moreover, KH 2 PO 4 -modified biochar addition increased the second adsorption of nitrogenous volatiles and fixed nitrogen into oxides-N. The total nitrogen fixation rate reached maximum (47.65%) at 5% KH 2 PO 4 impregnation. Thus, it is an effective nitrogen fixation method that MSS co-pyrolysis of 30% sugarcane bagasse with the second absorption of 5% KH 2 PO 4 -modified biochar. This study provided an effective solution to improve the treatment of municipal sewage sludge by pyrolysis technology.
研究领域:
环境科学
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能源与资源工程
✓ 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）