JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Cheng Lin,Jilong Tang,Sizhuo Wang,Qun Gao,Yanlin Liu,Wei Wu,Xiaoli Wang,Zhenguo Huang,Limei Yang
Featuring low cost and high theoretical capacity, phosphorus-rich iron diphosphides (FeP 2 ) have emerged as excellent anode candidates for lithium-ion batteries. However, the typical chemical synthses involving high temperatures and toxic gases have restricted the mass production of FeP 2 . We now report a FeP 2 /C/CNTs@3D interconnected graphene aerogel composite synthesized by ball milling and low temperature heat treatment. Because of the unique microstructure and synergistic effect between well-dispersed FeP 2 particles and graphene aerogel , the as-prepared FeP 2 /C/ [email protected] % displays excellent lithium storage performance in terms of reversible capacity (886 mA h g −1 at 0.1 A g −1 ), cycling stability (476 mA h g −1 at 2 A g −1 even after 1000 cycles), and rate capability (685 mA h g −1 at 5 A g −1 ). Machine learning methods (decision tree and random forest algorithms) prove effective in evaluating and predicting electrochemical performance of the electrode materials.
研究领域:
材料科学
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能源科学
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机器学习
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Liu Aohua,Chen Jianhong,Wang Gang,Yu Feng,Peng Banghua
Zinc-air batteries (ZABs) are regarded as promising energy storage devices next-generation, but it is limited by their sluggish oxygen reduction/evolution reactions (ORR/OER). Therefore, it is highly necessary to explore inexpensive and more efficient transition metal based electrocatalyst for facilitating OER and ORR. Consequently, in this paper, transition metal phosphating compounds (Co 2 P 2 O 7 /FeP 2 @C) was synthesized by high-temperature treatment CoFe terephthalic acid chelating with phytic acid (PA). The resulting nanostructures of Co 2 P 2 O 7 /FeP 2 coated with P-doped carbon exhibit outstanding electrocatalytic performance, achieving OER overpotential of 405 mV at 10 mA cm −2 and an initial ORR potential of 0.83 V versus reversible hydrogen electrode. Meanwhile, the ZABs prepared by Co 2 P 2 O 7 /FeP 2 @C exhibited high specific capacity (817.76 mAh g −1 ) and long cycle stability (60 h). Here, the well-designed terephthalic acid unified with PA, not only produced phosphide at elevated temperatures, but also enhanced catalyst porosity caused by abundant hydroxyl groups in PA, potentially increased specific surface area. Additionally, PA introduced P-doped carbon matrix, which effectively modulated the carrier's electronic structure, introduced more defect as active sites and combined with porous structure to enhance the electrocatalytic effect. This work introduced an environmentally friendly method to synthesize transition metal phosphide on porous carbon matrix, and it is anticipated to find extensive applications in electrocatalysis. Graphical abstract
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DOI
高影响因子
Energies
·
2025
·Vol. 18
·期 6
·1358
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IF 3.2
Junjie Shao,Xiaodong Wang,Houhua Ceng,Lan Hu,Zhean Su
The concurrent preservation of structural integrity and improvement of electrical conductivity in FeP2anodes presents a persistent challenge. Herein, FeP2nanoparticles embedded within a 3D N-doped honeycomb-like carbon framework composite (FeP2@NHC) are synthesized through a phosphorization process with a honeycomb-like Fe3C@NHC as a precursor. The in situ incorporation of FeP2nanoparticles into the 3D carbon matrix effectively restrains the aggregation, pulverization, and stripping of material during cycling, and significantly enhances reaction kinetics and structural stability, achieving a superior electrochemical performance. Specifically, FeP2@NHC electrodes demonstrate remarkable reversible capacity (1433.9 mA h g−1at 0.1 A g−1), excellent rate-capability (399.9 mA h g−1at 10 A g−1), and ultra-long cycle life (631.5 mA h g−1after 1000 cycles at 2 A g−1). Moreover, XRD analysis reveals that iron-rich Fe3C and Fe3O4precursors can react with NaH2PO2to form FeP2and FeP, respectively. This study offers a rational and practical strategy for designing other phosphorus-rich metal phosphide anode materials.
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
Nanoscale
·
2022
·Vol. 14
·期 24
·8744-8752
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IF 8.307
Xiaoge Mao,Kuan Wu,Shang-Qi Li,Fei-Hu Du,Gang Xu,Minghong Wu,Hua-Kun Liu,Shi-Xue Dou,Chao Wu
Phosphorus-rich iron phosphides (FeP2) have been regarded as excellent anode candidates for lithium storage owing to their low cost, high natural abundance, high theoretical capacity, and reasonable redox potential. However, FeP2 suffers from a few challenging problems such as low reversibility, fast capacity degradation, and big volume variation. Herein, we have designed and synthesized a 3D honeycomb-like carbon skeleton with embedded FeP2 nanoparticles (denoted as FeP2 NPs@CK), which can significantly promote the kinetics and maintain the structural stability during the cycling, resulting in an excellent electrochemical performance reflected by high reversibility and long-term cycling stability. FeP2 NPs@CK shows high reversibility, delivering a reversible capacity as high as 938 mA h g−1 at 0.5 A g−1. It also shows excellent cycling stability, delivering a capacity of 620 mA h g−1 after 500 cycles at 1 A g−1. Moreover, the fast kinetics and lithium storage mechanism of FeP2 NPs@CK are investigated by quantitative analysis and in situ X-ray diffraction. Such superior performance demonstrates that FeP2 NPs@CK could be a promising and attractive anode candidate for lithium storage.
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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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）