INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
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IF 7.2
Yuan Zhao,Qingshuang Wang,Dongming Yin,Shouliang Li,Chunli Wang,Long Liang,Shaolei Zhao,Chunmin Zhang,Limin Wang,Yong Cheng
The high dehydrogenation temperature of α-AlH 3 has always been an important factor hindering its development. In order to solve this problem, we synthesize Bi-MOF by hydrothermal method and burn it under inert gas to obtain Bi@C, which is used as catalyst ( x Bi@C, x = 3, 5 and 7 wt%) to improve the hydrogen desorption performance of α-AlH 3 . The dehydrogenation onset temperature of α-AlH 3 +5 wt% Bi@C drop to 80.4 °C, which is reduced by 43.4% compared with pure α-AlH 3 . At 120 °C, it can provide a stable hydrogen capacity of 7.45 wt%. In contrast, pure α-AlH 3 releases only 6.66 wt% hydrogen at the same time. The density functional theory calculations further indicate that the existence of Bi@C catalyst can make the Al–H bond length increase, more conducive to the release of hydrogen. The results show that the synergistic effect of Bi and porous carbon in Bi@C materials can improve the hydrogen desorption kinetics of α-AlH 3 , providing a good prospect for the application of α-AlH 3 in hydrogen storage .
研究领域:
材料科学
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氢能存储
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
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IF 3.428
Keru Cao,Fangyu He,Jun Yan,Weiwei Zhu,Yanan Wang,Yuheng Zhang,Biao Zhang,Xiaohua Yu,Qingfeng Shen,Chunxia Liu,Qi Wang
Electrochemical detection techniques are not sensitive in detecting isomers with similar structures and properties due to the disadvantages of some sensors such as instability, poor selectivity and susceptibility to environmental interference. Therefore, calcined metal–organic framework structure (Bi-MOF) was used to prepare its derivative Bi@C nanocomposites, and materials with multiple surface active sites and large specific surface area were developed to improve the current response signal of the detected substance. The morphology and structure of the prepared Bi@C were tested by XRD, SEM and other characterisation means. The electrochemical response of Bi@C nanocomposites was studied using an electrochemical workstation for hydroquinone (HQ) and catechol (CC) electrochemical detection. An electrochemical method was developed for the simultaneous determination of hydroquinone and catechol in a simple and highly selective manner. Differential pulse voltammetry (DPV) was used for simultaneous detection of HQ and CC. The results show that Bi@C electrode can detect isomers with high selectivity. Bi@C was detected in the range of 2–600 μM and 2–800 μM for HQ and CC, respectively, in pH = 7 solution. The detection limits were 0.14 μM and 0.12 μM(S/N = 3), respectively. The sensor is successfully applied to detect HQ and CC of real samples and has low detection limit, good recovery, high selectivity, stability and reproducibility. It provides a new idea for electrochemical detection.
研究领域:
材料科学
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分析化学
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产品关联
DOI
高影响因子
Sustainable Energy & Fuels
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2024
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IF 5
Yuting Wu,Keru Cao,Jun Yan,Yuheng Zhang,Biao Zhang,Yanan Wang,Yong Yang,Dacheng Zhou,Qi Wang,ChunXia Liu
Electrochemical detection techniques are unable to accurately distinguish isomers with similar structures and properties due to the poor stability and selectivity of some sensors and their susceptibility to environmental interference. Bimetallic synergistically synthesized MOF materials have various types of highly ordered pores and can be used as adsorbent materials and catalyst carriers. Therefore, a composite material was developed to prepare its derivative Cu/Bi@C using a bimetallic organic skeleton (Cu/Bi-MOF) as a precursor, inheriting the large number of active sites on the surface of the MOF and large surface area, while improving the electrochemical response signal. The morphology and structure of the synthesized Cu/Bi@C composites were tested and analyzed by XRD, SEM and other characterization methods, and the electrochemical response of the Cu/Bi@C nanocomposites was analyzed by using an electrochemical workstation. In this study, a simple and highly selective electrochemical method was developed for the simultaneous determination of catechol and catechol quinone. Differential pulse voltammetry (DPV) was used for the simultaneous detection of HQ and CC. The results showed that the Cu/Bi@C electrode was able to efficiently and highly selectively detect both isomers. The Cu/Bi@C electrode could detect HQ and CC in the range of 2–600 μM and 2–800 μM, respectively, under the detection environment of pH = 6.0. The detection limits were 0.08 μM and 0.11 μM (S/N = 3), respectively. The sensor was successfully applied to real samples and showed low detection limits, good recoveries, high selectivity, stability and reproducibility. This provides a new idea for electrochemical detection and is expected to be applied in several fields.
研究领域:
分析化学
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材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
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IF 3.9
Fang Yuqi,Li Mingzhao,Wang Zi Jin,Liu Xinyu,Yao Shaowei
Metal Bi is considered as a potential anode material for sodium-ion batteries due to its high theoretical specific capacity and low reaction voltage. However, the volume change (244%) during discharge and charge process seriously affects the cycle stability performance. Under this background, the sheet-like structure bismuth based metal-organic framework (Bi-MOF) precursor is prepared by hydrothermal method, and Bi@C composite material is obtained after heat treatment. Due to the unique sheet-like structure and the addition of carbon, the Bi@C composite material can effectively alleviate the volume change during the discharge and charge process. According to the electrochemical performance test, Bi@C electrode material still has high and stable discharge specific capacity of 392.0 mAh g −1 after 1000 cycles at the current density of 0.5 A g −1 , and has excellent rate performance. This work provides an important reference for the development of Bi-based anode materials for sodium-ion battery.
研究领域:
材料科学
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储能
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电化学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 39
·22364-22372
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IF 12.732
Ying Li,Xia Zhong,Xianwen Wu,Mingqi Li,Wei Zhang,Dan Wang
To develop high-performance and low-cost anode materials for sodium ion batteries, novel Bi/C nanosheet microspheres with an open pore structure (labeled as ops-Bi/C nanosheet microspheres), in which nanosheets are assembled from Bi nanospheres and disordered C, are synthesized through facile methods using Bi(NO3)3, glucose and ethylene glycol as raw materials. Benefiting from the synergy of the material's unique microstructure, carbon coating and NaPF6–diglyme electrolyte, the ops-Bi/C nanosheet microspheres exhibit a higher stable reversible capacity (∼400 mA h g−1 at 0.1 A g−1) than the theoretical capacity of Bi metal, excellent rate performance (396, 393, 395, 392 and 381 mA h g−1 at 0.2, 1, 5, 10 and 20 A g−1, respectively) and long cycle life (361 mA h g−1 after 10 000 cycles at 5 A g−1). Moreover, even if the mass loading of the ops-Bi/C nanosheet microspheres exceeds 10 mg cm−2, the electrode still shows a high reversible capacity of 321 mA h g−1 at 0.8 A g−1 with good cycle performance. The sodium ion full cells composed of the ops-Bi/C nanosheet microsphere anode and commercial Na3V2(PO4)3 (NVP) cathode exhibit high energy density (174 W h kg−1(total) at 0.1 A g−1(NVP)) and long cycle performance (600 cycles at 1 A g−1(NVP)).
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2022
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IF 4.132
Weiwei Tie,Surjya Sarathi Bhattacharyya,Cancan Han,Shuaibiao Qiu,Weiwei He,Seung Hee Lee
A novel high-performance BiOBr@graphene (BiOBr@G) photocatalyst with a new assembly structure had been demonstrated using a facile hydrothermal method through chemical bonding of reduced graphene oxide and structure-defined BiOBr flakes for improving charge separation and transfer performance, which were first synthesized at room temperature in immiscible solvents without corrosive acids. The prepared samples were characterized, and the BiOBr@G composite realized an efficient assembly portfolio of graphene and BiOBr flakes with defined structures, verified by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and Raman and X-ray photoelectron spectroscopy (XPS), in which BiOBr flakes were covalently linked with the assembled graphene sheets through the Bi–C bond. This composite exhibited remarkable visible light absorbance and efficient photoinduced charge splitting characteristics in comparison with those of pure BiOBr, as established by DRS absorption, photoluminescence radiation, and photocurrent study. Hence, a very small amount (5 mg) of the BiOBr@G composite displayed a complete photodegradation effect on the rhodamine B dye under only 15 min of visible light excitation, which was three times faster than that of pure BiOBr and extremely superior to that of commercial P25. This was probably ascribed to the well-defined BiOBr structure itself, elevated light absorbance, and Bi–C chemical bond inducing quick charge separation and transfer in the BiOBr@G composite. Additionally, investigations on the photocatalytic mechanism displayed that the photogenerated holes in the BiOBr valence band and derivative superoxide radicals played vital roles in the photodegradation of RhB dyes, as reinforced by the electron spin resonance method, where the covalent linking of BiOBr and graphene served as an effective pathway for charge transportation.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 48
·25746-25755
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IF 11.301
Jianhua Zhu,Jianwen Wang,Guanwu Li,Lu Huang,Mengyang Cao,Yingpeng Wu
The optimized design of size effects and interface effects can enhance the electron/Na-ion migration kinetics for energy-storage materials. Herein, small-size pomegranate-like Bi@C nanospheres (PBCNSs) are synthesized via a simple method and used as the anode of sodium-ion batteries. The composite has a hierarchical structure with ultra-small Bi nanoparticles embedded within carbon spheres which enable fast kinetics and efficient alleviation of stress/strain from the electrodes, and the conductive carbon matrix provides an interconnected electron transportation pathway. Moreover, the hierarchical structure can efficiently prevent the aggregation and pulverization of Bi nanoparticles. The PBCNSs anode delivers excellent sodium-storage performance with an outstanding rate performance (400.3 mA h g−1 at 0.2 A g−1, 372.8 mA h g−1 at 25 A g−1) and long-term cycle stability (340 mA h g−1 after 16 000 cycles at a high current density of 20 A g−1). More importantly, even at a high mass loading of 11.33 mg cm−2, a stable reversible capacity of 327.2 mA h g−1 can be obtained. The mechanism of the high performance was studied by electrochemical measurement and computer simulation.
研究领域:
材料科学
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电化学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 42
·33297-33310
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IF 4.4
Li Mingzhao,Cui Kaihua,Wang Jing,Yao Shaowei
When metallic bismuth (Bi) is adopted directly as anode materials for sodium-ion batteries (SIBs), severe volumetric variation emerges during the repeated alloying/dealloying redox reactions. Such structural evolution ultimately triggers electrode structural pulverization and rapid capacity fading of the batteries. Herein, Bi-based metal-organic framework (Bi-MOF) precursors were fabricated via a facile solvothermal strategy. Porous Bi@C composites with tunable morphologies were further synthesized by regulating solvent volume ratios and thermal treatment temperatures. On the one hand, MOF-derived nanoporous carbon frameworks construct abundant conductive pathways for ion and electron migration, thereby boosting the comprehensive electrochemical properties of the as-prepared composites. On the other hand, the electrochemically active Bi species are spatially confined and stabilized within the carbon matrix. This confinement effect efficiently alleviates the inherent volumetric expansion of Bi, and accordingly improves the long-term cycling stability of electrode materials. Among all samples, the optimized Bi@C-100:30-800 electrode delivers superior electrochemical performance. It retains a high reversible specific capacity of 443.6 mAh g -1 after 500 long-term cycles at a current density of 500 mA g -1 . Notably, a reversible specific capacity of 416.5 mAh g -1 can still be achieved after 1000 cycles at 1 A g -1 , accompanied by a coulombic efficiency of 99.9%. Such remarkable electrochemical merits endow the material with promising application potential in advanced sodium-ion batteries.
✓ 已验证
DOI
高影响因子
IONICS
·
2022
·Vol. 28
·期 11
·4977-4987
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IF 2.961
Shi Chonghua,Fu Hang,Nie Jiajin,Yao Shaowei
Bismuth-based material as a stable anode material for lithium-ion battery, which has the advantages of stable operating voltage and large volume energy density. In order to make the most of the theoretical specific capacity of 386 mAh g −1 bismuth-based materials, the carbon coating method will be used to obtain stable specific capacity. However, electrostatic spinning is great method of carbon coated precursor preparation. Here, the BiCl 3 reagent is added into the PAN-DMF spinning liquid to synthesize the fibrous Bi@C composites precursor, and the Bi@C fibre is obtained after heat treatment. Then the Bi@C fibres with different BiCl 3 content are used as anode materials for lithium-ion batteries to test the electrochemical performance of Bi@C. The results show that Bi@C fibre electrode can maintain the discharge capacity of 415.3 mAh g −1 at the current density of 100 mA g −1 for 100 cycles when the content of BiCl 3 is 1.5 g. When the current density is 500 mA g −1 , the specific capacity can still reach 415.7 mAh g −1 after 250 cycles and shows excellent electrochemical performance.
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
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IF 7.392
Xinhui Liu,Jing Xie,Yakun Tang,Jia Guo,Zhenjiang Lu,Baolin Liu,Hongyu Zhang,Yali Cao
Large designs are devoted to decrease the volume fluctuation and pulverization of bismuth anodes. However, further advances in cycling stability at higher current density remain challenging. Herein, we skillfully designed a unique sandwich structure composed of bismuth nanoparticles coated with carbon nanolamella (Bi@C) and carbon nanolayers (C NL) via a simple pyrolysis method. Benefiting from the synergistic effect of the unique interlayer hybrid structure, the Bi@C composite material has an interconnected electron transportation pathway, which effectively alleviates the volume expansion during alloying/dealloying and reduces the agglomeration of the Bi particles during cycling. In addition, the Bi@C embedded in the double carbon layers structure (Bi@C/C NL) not only serve as highly conductive networks for Li + , but also provide a large surface area for electrolyte penetration and storage, which will enhance the charge transfer reaction kinetics process. As a result, the Bi@C/C NL-700 anode revealed a superior capacity (427.5 mAh g −1 at 500 mA g −1 after 300 cycles), excellent long cycling stability (373 mAh g −1 at 3 A g −1 after 1500 cycles) and improved rate performance, outperforming the most reported Bi-based anode materials for lithium-ion batteries. This work will lay an experimental foundation for the rational design of high-performance anode materials in rechargeable batteries with layered hybrid structures.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
Science China-Chemistry
·
2025
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IF 9.7
Wu Min,Nan Mingjun,Liu Shumin,Zhong Caihe,Qiao Lin,Zhang Huamin,Ma Xiangkun
With the increasing demand for energy storage technology, iron-chromium flow batteries (ICFBs) have been widely concerned because of their price advantage. However, the low electrochemical activity of Cr 3+ /Cr 2+ redox couples and the side hydrogen evolution reaction limit the industrial application of ICFBs. A multi-dimensional Bi/carbon composite electrocatalyst (Bi@C) for ICFB is designed and prepared to improve the electrochemical activity of Cr 3+ /Cr 2+ redox couples. Benefiting by using the Bimetal organic framework (Bi-MOF) with solid matrix as precursors, Bi nanospheres are highly dispersed on the Bi@C electrocatalyst that effectively enhances the electrochemical activity. The special morphology of Bi@C electrocatalyst helps the transfer of electrons and ions, significantly reducing the polarization of battery. Herein, the 3D porous carbon frames accelerate mass transfer, and the 2D carbon nanobelts and carbon layer coating on 0D Bi nanospheres improve the conductivity of Bi nanospheres. Therefore, the ICFB with multi-dimensional Bi@C electrocatalyst exhibits coulombic efficiency of 98.10% and energy efficiency of 79.14% at 140 mA cm −2 , which is higher than ICFBs with commercial graphite carbon electrocatalyst and with heat treatment carbon felt. This work provides a simple and economical method to fabricate a high-performance multidimensional Bi@C electrocatalyst for Cr 3+ /Cr 2+ redox couples, boosting the development of ICFBs.
研究领域:
能源材料
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Jingyu Xu,Yangyang Xie,Jingqiang Zheng,Congyin Liu,Yanqing Lai,Zhian Zhang
Sodium (Na) metal anode has been considered as the promising candidate for next generation high-energy-density rechargeable batteries such as Na-S, Na-O 2 and Na-CO 2 , owing to its high specific capacity, low electrode potential and low cost. Unfortunately, some intractable problems hinder the practical application, including volume change and dendrite formation induced by inhomogeneous Na nucleation. Herein, 3D carbon cloth (CC) supporting Bi-MOF derived carbon nanosheets containing Bi nanoparticles and carbon shells (CC@Bi@C) were prepared to serve as Na deposition/dissolution hosts, integrating high surface area and favorable sodiophilicity. Due to the existence of Bi sodiophilic sites, Na nucleation and deposition can be induced, rendering uniform and dendrite-free morphology. Moreover, the 3D carbon framework can effectively reduce the current density and uniform distribution of Na + flux, solving the uncontrolled Na dendrite growth. As a result, the CC@Bi@C||Na half cell operating at 1 mA cm −2 for 1 mA h cm −2 exhibits 99.85% Coulombic efficiency for nearly 500 cycles. The symmetric cell maintains stable cycle for more than 300 h at 2 mA cm −2 for 2 mA h cm −2 with low overpotential. When paired a full cell with Na 3 V 2 (PO 4 ) 3 cathode, CC@Bi@C anode exhibits a stable capacity of 103.4 mA h g −1 at 1C (1 C = 117 mA h g −1 ) over 150 cycles for 95.5% capacity retention with high CE of 99.0%. This work provides a facile strategy to inhibit dendrite growth and uniform Na deposition.
研究领域:
材料科学
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能源存储与转换
✓ 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）