CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Xiaolin Yan,Fangjun Ye,Yinggan Zhang,Liang Lin,Baisheng Sa,Fang Liu,Junjie Li,Laisen Wang,Jie Lin,Qingshui Xie,Dong-Liang Peng
Li dendrites caused by nonuniform Li plating and locally concentrated ion/electron flux would give rise to poor cycling performance and safety issues of short-circuit and so on. Herein, a functional nanolayer consisting of Indium Tin oxide (ITO) nanoparticles on 3D Cu foam was fabricated as case study to understand the mechanism of metal oxides on anchoring Li metal spots and how initial Li nucleation influences the following dendrites growth. Based on the experimental and theoretical results, it is demonstrated that not only the pristine metal oxides have higher binding energy with Li atom, but also in situ formed alloy phase during alloying process performs a great importance on homogeneous nucleation, thus leading to ordered ion/electron distribution and fast kinetics. Therefore, excellent wettability and even self-propagation behavior between ITO-Cu foam and molten Li are achieved, meanwhile the half cells with ITO-Cu foam electrodes exhibit an ultralow nucleation overpotential of 2 mV under 0.5 mA cm −2 . When the designed ITO-Cu foam@Li anodes is matched with LFP (LiFePO 4 ) cathodes, the constructed full cells can empower superior cycling stability for over 1000 cycles at 5C (3.4 mA cm −2 ), and remarkable specific capacity (149 mAh g −1 ) and capacity retention (80% for 250 cycles) even with ultrahigh mass loading (15.3 mg cm −2 ), which provides an avenue to regulate Li deposition/dissolution for high energy Li metal batteries.
研究领域:
材料科学
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电化学
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能源存储
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纳米科技
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金属电池
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2022
·Vol. 33
·期 10
·2209643
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IF 19.924
Yujie Yang,Donghui Li,Jinlong Cai,Hui Wang,Chuanhang Guo,Shang Wen,Wei Li,Tao Wang,Dan Liu
Organic semiconductor nanoparticles (NPs) are attractive photocatalysts to produce hydrogen from water splitting. Herein, a ternary strategy of incorporating crystalline n-type molecule IDMIC-4F into the host system made of p-type polymer PM6 and n-type molecule ITCC-M is demonstrated. ITCC-M and IDMIC-4F form compact alloy-like composite with shorter lattice spacing in the ternary p/n heterojunction NPs, resulting in enhanced exciton dissociation and charge transfer characteristics. As the result, an unprecedented hydrogen evolution rate (HER) of 307 mmol h −1 g −1 and a maximum apparent quantum efficiency of 5.9% at 600 nm are achieved in the optimized ternary NPs (PM6:ITCC-M:IDMIC-4F = 1:1.3:0.2), which is among the highest HER from organic photocatalysts to the best of the authors’ knowledge. The alloy-like composite also improves the operational stability of ternary NP photocatalysts. This study shows that synergizing two compatible n-type small molecules to form alloy-like composite is a promising approach to design novel organic photocatalysts for boosting the photocatalytic hydrogen evolution efficiency.
研究领域:
材料科学
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光催化
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
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2025
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IF 2.6
Zhihui Li,Xinfa Dong
Among the various methods for removing carbon monoxide (CO) from hydrogen-rich (H2-rich) gases, carbon monoxide selective methanation (CO-SMET) has become one of the most effective ones, bringing considerable advantages in terms of performance, environmental sustainability and cost. A bimetallic NiRu/η-Al2O3 catalyst with Ni–Ru alloy phases was prepared and its performance in the removal of CO through a selective methanation process was examined in this study. Also, a comparison was made with the NiRu/γ-Al2O3 catalyst. The NiRu/η-Al2O3 catalyst demonstrated excellent CO-SMET performance, reducing the CO concentration to below 10 ppm with over 50% selectivity between 215 and 300 °C. Its excellent catalytic performance can be ascribed to numerous Ni active sites, increased oxygen vacancies, and more acidic sites. Additionally, the NiRu/η-Al2O3 catalyst had the ability to resist sintering because of the formation of Ni–Ru alloy on it. Moreover, it also exhibited good catalytic stability.
研究领域:
催化化学
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能源材料
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环境催化
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化学工程
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表面科学
✓ 已验证
产品关联
DOI
高影响因子
RARE METALS
·
2023
·Vol. 43
·期 2
·562-574
·
IF 8.8
Chen Jia-Xin,Zhang Guo-Qiang,Qin Xian-Ying,Lin Kui,Yang Zi-Jin,Liang Ge-Meng,Xia Yue,Zhang Guo-Bin,Wu Hai-Kun,Cai Qiu-Chan,Lin Hai,Li Bao-Hua
Uncontrolled growth of lithium dendrite will lead to low Coulombic efficiency and poor cycle stability, which hinders the commercialization of lithium metal batteries. Herein, a novel modified lithium anode with reduced graphene oxide conductive network containing trace lithiophilic phosphorus (P-rGO/Cu) is prepared by electrospraying technique combined with heat treatment process. The rGO layer has a concave and undulating conductive structure, which can significantly improve the effective electrical contact between lithium metal and the current collector, speed up the kinetics of interfacial electron transport and reaction, and improve the resistance of the negative electrode to the internal stress caused by volume change of the lithium, which is advantageous for the stability of the SEI film. The extremely small and uniformly distributed red phosphorus element avoids the volume change caused by lithiation to the maximum extent. Lithiophilic two-phase compound Li 3 P obtained by alloying P with Li can directionally induce the homogeneous nucleation and dense deposition of lithium metal, address the issue of lithium dendrites and extend the cycle life of the batteries. The obtained P-rGO/Cu exhibits excellent electrochemical performance with an average Coulombic efficiency (CE) of 98% at a current density of 1 mA·cm −2 for 400 cycles, and the capacity retention rate of the full cell matched with lithium iron phosphate (LFP) is 83% after 400 cycles at 1C. Graphical abstract
研究领域:
储能
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材料科学
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电化学
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纳米技术
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表面工程
✓ 已验证
DOI
高影响因子
Journal of Magnesium and Alloys
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2025
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IF 13.8
Xiaoying Yang,Xinqiang Wang,Ruijie Liu,Yanxia Liu,Zhenglong Li,Wengang Cui,Fulai Qi,Yaxiong Yang,Jian Chen,Hongge Pan
The role of catalysts in enhancing the hydrogen storage kinetics of the Mg/MgH 2 system is pivotal. However, the exploration of efficient catalysts and the underlying principles of their design remain both a prominent focus and a significant challenge in current research. In this study, we present a bimetallic oxide of Bi 2 Ti 2 O 7 hollow sphere as a highly effective catalyst for MgH 2 . As a result, the Bi 2 Ti 2 O 7 -catalyzed Mg/MgH 2 system lowers the hydrogen desorption initiation temperature to 194.3 °C, reduces the peak desorption temperature to 245.6 °C, decreases the dehydrogenation activation energy to 82.14 kJ·mol −1 , and can absorb 5.4 wt. % of hydrogen within 60 s at 200 °C, demonstrating outstanding hydrogen ab/desorption kinetics, compared to pure MgH 2 . Additionally, it can maintain a high hydrogen capacity of 5.2 wt. %, even after 50 dehydrogenation cycles, showing good cycle stability. The characterization results show that the high-valent Bi and Ti in Bi 2 Ti 2 O 7 are reduced to their low-valent or even zero-valent metallic states during the dehydrogenation and hydrogenation process, thus establishing an in-situ multivalent and multi-element catalytic environment. Density functional theory calculations further reveal that the synergistic effects between Bi and Ti in the Bi-Ti mixed oxide facilitate the cleavage of Mg-H bonds and lower the kinetic barrier for the dissociation of hydrogen molecules, thereby substantially enhancing the kinetics of the Mg/MgH 2 system. This study presents a strategic method for developing efficient catalysts for hydrogen storage materials by harnessing the synergistic effects of metal elements.
研究领域:
材料科学
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能源存储
·
催化
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纳米技术
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物理化学
✓ 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）