CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yehong Du,Xinyu Wang,Yan Zhang,Haibang Zhang,Jianzong Man,Kun Liu,Juncai Sun
Rechargeable zinc-ion batteries (ZIBs) have shown significant promise as alternative battery technology due to their environmental benignity and cost-effectiveness. However, the current development of ZIB cathode is still hindered by various challenges such as less-than-ideal capacity, poor cyclic performance, and the typical use of low mass loading during battery evaluation. Here we prepared a nanosheet-assembled compact CaV 4 O 9 microflowers/carbon nanotubes (CaVO/CNTs) composite film via a facile spray printing technique. The resultant CaVO/CNTs composite film possessed extremely short ion diffusion pathways, excellent electrical conductivity, and superior structural stability. At a high mass loading of 50 mg cm −2 , the as-fabricated electrode could attain an areal capacity of 10.5 mAh cm −2 . Furthermore, CaVO/CNTs underwent phase transformation during the initial charging process to form amorphous V 2 O 5 ·nH 2 O, which could provide more active sites for Zn 2+ storage. As a result, CaVO/CNTs electrode was able to deliver 410 mAh g −1 at 0.1 A g −1 , high-rate performance (270 mAh g −1 at 10 A g −1 ), and ultra-long cyclic life of 91% retention after 3000 cycles. Since CaVO/CNTs film possessed good flexibility and excellent electrical conductivity, a flexible soft-packaged ZIB was assembled based on this film, and it was able to exhibit consistent electrochemical properties under various bending states.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2021
·
IF 17.789
Yong Wang,Hui Xu,Xi Chen,Hong Jin,Jiping Wang
Binders play an important role in preserving the mechanical stability of electrodes. Nevertheless, the typical binders normally are not stretchable to withstand a repeated large volume change, which are not suitable for high-loading silicon anodes. Herein, inspired by the natural parthenocissus, an elastic self-healing CA-PAA binder is designed for silicon anode to implement long-terms stable cycling. The multiple hydrogen bonds formed by in-situ cross-linking of water soluble citric acid (CA) and poly (acrylic acid) (PAA) can establish a reversible network for silicon particles. The CA molecule not only serves as the protecting buffer layer to release the inner stress and stabilize the solid electrolyte interface (SEI), but it can also connect with PAA to form a “inner flexibility and outer rigidity” spatial topology. Consequently, this self-healing binder enhanced silicon anode exhibits an excellent performance on accommodating the large volume change during cycling process. As expected, the silicon anode shows an impressive initial areal capacity of 6.5 mAh cm −2 , 78% capacity retention after 50 cycles with a high mass loading of 1.8 mg cm −2 , and an initial Coulombic efficiency of 89.5%. Meanwhile, the Si||NCM 811 full cell shows 74% capacity retention after 100 cycles with a reversible capacity of 1.7 mAh cm −2 .
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Ze-Wei Wu,Jing Xiong,Cun-Wen Wang,Yuan-Hang Qin
Although supported Ni is generally considered the most active non-noble metal catalyst for decomposing NH 3 to produce CO x -free H 2 , its activity is not sufficient. Herein, supporting high-loading Ni on SBA-15 is explored to alleviate the low intrinsic activity issue of Ni. SBA-15 supports with tunable textual properties are synthesized to support Ni catalyst for NH 3 decomposition. Characterization shows that Ni catalyst with a loading close to 40 wt% supported on SBA-15 with the largest specific surface area (Ni/SBA-15-80) exhibits a NH 3 decomposition performance much better than those reported on other Ni-based NH 3 decomposition catalysts, resulting from its favorable textural properties and high Ni loading. In addition, Ni/SBA-15-80 shows excellent catalytic stability, with no activity degradation over an 80-h NH 3 decomposition test. This work reveals the importance of textural properties of support and Ni loading to NH 3 decomposition performance and can provide a new idea for synthesizing high-performance NH 3 decomposition catalysts.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Rongrong Si,Honggang Luo,Junwen Pu
Wood-conducting polymer materials have been widely used as supercapacitor electrode; however, it remains challenging to achieve a simple method to improve the homogeneity of the conductive material on wood and to reach high mass loading. Herein, a novel “pore-making, active substance-filling, densification (dissolution, in-situ polymerization of polyaniline (PANI), self-shrinking)” strategy is proposed for the preparation of wood electrodes with a high mass loading (41.4 wt%) and homogeneity. Ingeniously, ZnCl 2 as a dissolving agent and pore-making agent to treat delignified wood can generate more pores on the wood, which is more conducive to the penetration of aniline small molecules, besides, the dissolved fine fibers can be entangled with more PANI, which can improve the loading and homogeneity of PANI. After drying treatment, there will be shrinkage again, playing a certain physical densification effect on the large lumen. The optical electrode was RWP2 showing high electrochemical performance (2328.9 mF/cm 2 , 1 mA/cm 2 ), and stability (5000 cycles, 89.3 %). Moving forward, the RWP2//RWP2 SSC showed an excellent energy density of 164.24 μwh/cm 2 at a power density of 250 μw/cm 2 . Remarkably, the simple and versatile strategy of designing wood-based materials with high mass loading provides new research ideas for realizing multifunctional applications.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 4
·1936-1942
·
IF 3.108
Chao Chen,Yonggao Jia,Dan Jia,Shuxin Li,Shulin Ji,Changhui Ye
Silver nanowire transparent conductive films have been proposed as a promising candidate to replace indium tin oxide films for electronic applications. Stable ink with a high loading amount of silver nanowires is essential for the scale-up of the production of transparent conductive films considering the storage need due to separated procedures of nanowire synthesis and film formation. It is very hard to re-disperse the nanowires if irreversible aggregation happens during storage for coating. The paradox of stabilizing the concentrated nanowire ink and facile utilizing of the ink for highly conductive films with a low junction resistance at the joint points of organic stabilizer-capped silver nanowires has to be solved. A two-step method has been provided to overcome the difficulty in this work. First, a silver nanowire ink with the loading amount of 5 mg mL−1 is formulated, which is stable for more than three months under normal conditions. The success in maintaining the long-term stability lies in applying an appropriate amount of surfactant and choosing organic solvents with appropriate mixing ratios to strengthen the interaction of the surfactant with the silver nanowires and to decrease the free energy through enthalpy of mixing silver nanowires into the solvent for aggregation prevention. Second, the concentrated ink at any time is simply washed a suitable number of times and diluted to a uniform dispersion for coating of TCFs with excellent optical and electrical performance, having a figure of merit σDC/σOP (ratio of the electrical conductance to optical conductance) as high as 228. The viability of treating silver nanowires in large quantity paves the way for real industrial applications.
研究领域:
材料科学
·
纳米技术
·
电子工程
✓ 已验证
DOI
高影响因子
Materials Chemistry Frontiers
·
2020
·Vol. 5
·期 3
·1324-1329
·
IF 6.788
Songjie Wang,Yongyin Liang,Wenchen Zhuo,Hang Lei,Muhammad Sufyan Javed,Botian Liu,Zilong Wang,Wenjie Mai
To meet the increasing requirement of flexible energy storage devices, it is critical to develop an electrode with commercial-level mass loading of active material for supercapacitors. Herein, we fabricated a high mass loading and freestanding CNT@PPy electrode (6.07 mg cm−2) by a simple vacuum filtration and low-temperature polymerization method. Moreover, owing to the high conductivity of CNT fiber networks offering a fast electron transporting passage, the optimized CNT@PPy electrode exhibits a prominent areal capacitance (2.6 F cm−2) with significantly improved mechanical properties (its ultimate tensile strength is 20.7 MPa, 23 times higher than that of pure CNT film). The freestanding all-solid-state symmetric supercapacitor based on the optimized CNT@PPy electrode obtains a high power density of 0.64 mW cm−2 at an energy density of 76.7 μW h cm−2.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2018
·Vol. 24
·期 50
·13253-13258
·
IF 5.16
Junhan Cheng,Dan Zhao,Lishuang Fan,Xian Wu,Maoxu Wang,Hexian Wu,Bin Guan,Naiqing Zhang,Kening Sun
Graphical Cathode materials : A 3D conductive nanoporous polar composite has been constructed as a host material for a lithium/sulfur battery; this material dramatically enhances the reaction kinetics and deepens the reaction depth under a high areal loading mass of sulfur (see figure). Sulfur cathodes have attracted significant attention as next-generation electrode material candidates due to their considerable theoretical energy density. The main challenge in developing long-life Li–S batteries is to simultaneously suppress the shuttle effect and high areal mass loading of sulfur required for practical applications. To solve this problem, we have designed a novel nickel phosphide nanoporous composite derived from metal–organic frameworks (MOFs) as sulfur host materials. Homogeneous distribution of Ni 2 P nanoparticles significantly avoids soluble polysulfides migrating out of the framework through strong chemical interactions, and the conductive 3D skeleton offers an accelerating electron transport. As a result, S@Ni 2 P/NC has exhibited an enhanced performance of 1357 mAh g −1 initially at 0.2 C (1 C=1675 mA g −1 ) and remaining at 946 mAh g −1 after 300 cycles. Even at an areal mass loading of sulfur as high as 4.6 mg cm −2 , the electrode still showed an excellent specific capacity of 918 mAh g −1 .
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysts
·
2023
·Vol. 13
·期 2
·298
·
IF 3.9
Haoting Yan,Yongwang Ren,Renkun Zhang,Feixiang Chang,Qinhong Wei,Jing Xu
It is a challenging task for selective hydrogenation of cinnamaldehyde (CAL) to hydrocinnamaldehyde (HCAL) without additional by-product formation. In this work, a La2O3supported high Ni content nanoparticle catalyst was prepared for CAL selective hydrogenation. Meanwhile, Co-La2O3catalysts were used as a reference catalyst. XRD, TEM, STEM-HAADF, XPS, and H2-TPR measurements were used to investigate the physicochemical properties of Ni-La2O3catalysts. The experimental results confirmed that the CAL conversion and HCAL selectivity were effectively promoted with the increase of Ni loading amounts. At a Ni/La molar ratio of four, a high HCAL selectivity of 87.4% was obtained at a CAL conversion of 88.1% under mild reaction conditions. The catalyst was recycled five times without activity loss. Combined with various characterizations, it could be inferred that the good hydrogen adsorption and dissociation capacity of Ni and the presence of a certain amount of oxygen vacancies on the La2O3support have a positive effect on the improvement of HCAL selectivity. This work provided an effective path to design transition-metal-based supported oxide catalyst for the cinnamaldehyde hydrogenation to hydrocinnamaldehyde.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Xin Wang,Pan Jiang,Xinjian Dai,Hao Guan,Xiaoqing Wang
Developing high-performance metal-organic framework (MOF)-based composites with high loading and uniform distribution of MOF nanoparticles is crucial for their adsorption-associated applications but remains challenging due to the lack of ideal carriers. Herein, a novel MOF-based composite was developed by in situ growth of MIL-53(Al) crystals within the carboxylated wood sponge (CWS) derived from natural balsa wood. The conversion of the cellular structure of natural wood into a lamellar structure greatly enhances the accessibility of the wood scaffold, while the introduction of carboxyl groups onto the cellulose skeleton of the wood sponge encourages the selective growth of MIL-53(Al) crystals on the lamellae of CWS. The structural features of the obtained MIL-53(Al)@CWS were investigated with FT-IR, XRD, SEM, and N 2 adsorption/desorption isotherms. The MIL-53(Al) loading can be finely tuned by adjusting the concentration of the MOF precursor solutions, and an appropriate MIL-53(Al) loading of 23 wt% results in the uniform dispersion of MIL-53(Al) crystals within the wood sponge without agglomeration. Benefiting from the high loading of MIL-53(Al) and the unique lamellar channels of CWS, the developed MIL-53(Al)@CWS can effectively adsorb various organic dyes such as rhodamine B (RhB), methylene blue, Congo red, and methyl orange in water, with a high adsorption capacity of 135.82 mg g −1 for RhB. Density functional theory (DFT) calculations reveal the detailed dynamic diffusion pathways and the molecular interactions between RhB and MIL-53(Al). This work demonstrates the advantages and potentials of lamellar wood sponges as a promising host matrix in supporting MOF powders for adsorption-associated applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Wenhui Tian,Penggang Ren,Xin Hou,Baoli Fan,Yilan Wang,Lu Pei,Hongtao Wang,Zhengyan Chen,Yanlin Jin
Transition-metal phosphates/phosphides showcase significant promise for energy-related applications because of their high theoretical electrochemical characteristics. However, sluggish electro/ion transfer rates and kinetically unfavorable reaction sites hinder their application at high mass loading. Herein, a self-supporting electrode based on transition-metal phosphates was successfully fabricated via a one-step electrodeposition process. The nanosheet structure of transition-metal phosphates, formed by interconnecting nanoparticles, effectively mitigates the impact of stress and achieves a high mass-loading (21 mg cm −2 ) of the electrode. Additionally, the oxygen vacancy-rich and porous nanostructure of transition-metal phosphates endows the as-prepared electrodes with a significantly increased conductivity and fast ion migration rate for enhancing electrochemical kinetics. Consequently, the as-fabricated transition-metal phosphate electrode displays the highest areal specific capacity of 39.2F cm −2 . Furthermore, the asymmetric supercapacitor achieves a maximum energy density of 0.79 mWh cm −2 and a high capacity retention of 93.0 % for 10000 cycles under 60 mA cm −2 . This work provides an ideal strategy for fabricating flexible electrodes with high mass loading and synthesizing transition-metal phosphate electrodes rich in oxygen vacancies.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Wang Yi,Li Chongao,Han Xiao,Bai Jintao,Wang Xuejing,Zheng Lirong,Hong Chunxia,Li Zhijun,Bai Jinbo,Leng Kunyue,Lin Yue,Qu Yunteng
Catalyst systems populated by high-density single atoms are crucial for improving catalytic activity and selectivity, which can potentially maximize the industrial prospects of heterogeneous single-atom catalysts (SACs). However, achieving high-loading SACs with metal contents above 10 wt% remains challenging. Here we describe a general negative pressure annealing strategy to fabricate ultrahigh-loading SACs with metal contents up to 27.3–44.8 wt% for 13 different metals on a typical carbon nitride matrix. Furthermore, our approach enables the synthesis of high-entropy single-atom catalysts (HESACs) that exhibit the coexistence of multiple metal single atoms with high metal contents. In-situ aberration-corrected HAADF-STEM (AC-STEM) combined with ex-situ X-ray absorption fine structure (XAFS) demonstrate that the negative pressure annealing treatment accelerates the removal of anionic ligand in metal precursors and boosts the bonding of metal species with N defective sites, enabling the formation of dense N-coordinated metal sites. Increasing metal loading on a platinum (Pt) SAC to 41.8 wt% significantly enhances the activity of propane oxidation towards liquid products, including acetone, methanol, and acetic acid et al. This work presents a straightforward and universal approach for achieving many low-cost and high-density SACs for efficient catalytic transformations.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2024
·
IF 13
Rui Ling,Shuting Zhao,Chenxiao Meng,Wenyun Wang,Chao Yang,Wentao Qi
Extending the layer spacing of the (001) planes to regulate the mobility of Zn 2+ is widely adopted to optimize the performance of VOPO 4 ·2H 2 O cathode for zinc-ion batteries. However, the unique function originating from other planes is often neglected. Herein, an effective in situ conversion methodology is proposed for the synthesis of the (200) oriented growth of vertical VOPO 4 ·2H 2 O nanosheets with oxygen vacancies (V Od -VOPO 4 ). Theoretical simulation and ex situ characterizations collaboratively demonstrate that the richly exposed (200) plane with tetragonal channels can offer quick pathways for in-layer and cross-layer migration of Zn 2+ , exhibiting enhanced transfer kinetics with improved reversible capacity. Meanwhile, efficient electron migration in V Od -VOPO 4 is guaranteed by the introduction of oxygen vacancies. Thus, the as-prepared V Od -VOPO 4 harvests exceptional discharge capacity, impressive rate capability, and remarkable long-cycle stability at high mass loading. Notably, the V Od -VOPO 4 electrode (15 mg cm −2 ) provides a capacity of 213.5 mAh g −1 with an ultrahigh areal capacity of 3.02 mAh cm −2 at 0.1 A g −1 , showing great potential for applications. This study highlights the orientated growth strategy for facilitating ion storage and migration, offering novel perspectives on the development of high-performance electrodes and beyond.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）