Journal of Energy Storage
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2022
·
IF 8.907
Chunfeng Xue,Wei Zhao,Qian Zhang,Jinxin Wang,Yueyue Wei,Kai Lv,Teng Wu,Yu Lin,Xiaohong Li,Xiaogang Hao
Zeolitic imidazolate framework (ZIF) derived carbon generally suffers from a hydrophobic close-ended microstructure, leading to poor rate capability and low energy density in supercapacitors . In view of the defects, a facile strategy is demonstrated to synthesize open-door nanoporous carbon with self-doped heteroatoms by the pyrolysis of salt-filled ZIF-8. Specifically, inert NaCl is impregnated into the channels of ZIF-8 to inhibit framework shrinkage and promote the generation of open pore system . The resultant carbon CZ-900 features with O, N co-doped surface and specific surface area of 1420 m 2 ·g −1 . It exhibits a specific capacitance of 574.9 F·g −1 at 0.5 A·g −1 in aqueous electrolyte of 1.0 M H 2 SO 4 , which is higher than other carbons derived from ZIF-8. In the two-electrode system, it shows a high energy density up to 21.1 Wh·kg −1 at a power density of 211.3 W·kg −1 . The superior performances can be attributed to its integration of open-pore structure and N/O co-doped surface, which provides a fast ion-transport pathway, improved interface wettability, broadened operation potential and efficient faradic-activity.
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
FUEL
·
2024
·
IF 6.7
Quanli Ke,Pengyun Pan,Mei Lu,Guonan Fang,Wei Zhang,Ruina Zhang,Guokai Cui,Xiaopo Niu,Feng Xiong,Ying Zhou,Bo Zhao,Hanfeng Lu
Herein, copper and manganese heteroatoms were incorporated into the siliceous MFI frameworks with high dispersity. When employed in the CO 2 /N 2 binary gas separation, a delicate trade-off for the CO 2 adsorption capacity, adsorption heat and moisture resistance could be realized on the heteroatom-incorporated MFI zeolites, especially the Cu-incorporated one. In order to confirm the role that heteroatoms played in CO 2 adsorption, the textural analyses were then conduced, which proved that the enhanced microporosity may be at the heart of the promoted CO 2 capacity. Next to that, the in situ DRIFTs spectra were continuously tracked during the dynamic adsorption process. Compared to the commercial aluminosilicate analogue, the MFI zeolites with Cu/Mn heteroatoms possesses weaker electrostatic field intensity, which in consequence resulted in their stronger moisture resistance, even in presence of humidity up to 90 RH%. As such, a bottom-up adjustment for the adsorption properties of zeolites in practical environment containing competitive moisture impurity was shown.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Weiji Dai,Yin'an Zhu,Yike Ye,Ye Pan,Tao Lu,Saifang Huang
Surface reconstruction of non-oxide oxygen evolution reaction (OER) electrocatalysts has been intensively studied to improve their catalytic performances. However, further modification of the reconstructed active surfaces for better catalytic performances has not been reported. In this work, NiSe nanorods are prepared on nickel foam (NiSe@NF) as the pre-catalyst for electrochemical OER. It is revealed that non-stoichiometric NiO nanosheets with abundant Ni vacancies (Ni x O) are formed on the surfaces of NiSe nanorods (Ni x O/NiSe@NF) via in-situ electrochemical oxidation. Furthermore, the OER performances are obviously improved after heteroatom Fe is incorporated electrochemically into Ni x O nanosheets ((FeNi)O/NiSe@NF). For OER to have a current density of 20 mA cm −2 in 1 M KOH solution, the as-prepared (FeNi)O/NiSe@NF electrode only needs an overpotential of 268 mV. Density functional theory (DFT) calculations reveal that the formation of Ni vacancy can increase the free energy of *OH. More importantly, the incorporation of heteroatom Fe into Ni vacancy can significantly decrease the free energy of *O, which enables Fe-NiO to have the lowest theoretical overpotential for OER in this work. The present work provides a facile and universal strategy to modify the reconstructed active oxides’ surfaces for higher electrocatalytic performances.
研究领域:
材料科学
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电化学
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理论计算
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2021
·Vol. 26
·期 21
·6672
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IF 4.412
Syed Shoaib Ahmad Shah,Tayyaba Najam,Costas Molochas,Muhammad Altaf Nazir,Angeliki Brouzgou,Muhammad Sufyan Javed,Aziz ur Rehman,Panagiotis Tsiakaras
Heteroatom doping is considered an efficient strategy when tuning the electronic and structural modulation of catalysts to achieve improved performance towards renewable energy applications. Herein, we synthesized a series of carbon-based hierarchical nanostructures through the controlled pyrolysis of Co-MOF (metal organic framework) precursors followed by in situ phosphidation. Two kinds of catalysts were prepared: metal nanoparticles embedded in carbon nanotubes, and metal nanoparticles dispersed on the carbon surface. The results proved that the metal nanoparticles embedded in carbon nanotubes exhibit enhanced ORR electrocatalytic performance, owed to the enriched catalytic sites and the mass transfer facilitating channels provided by the hierarchical porous structure of the carbon nanotubes. Furthermore, the phosphidation of the metal nanoparticles embedded in carbon nanotubes (P-Co-CNTs) increases the surface area and porosity, resulting in faster electron transfer, greater conductivity, and lower charge transfer resistance towards ORR pathways. The P-Co-CNT catalyst shows a half-wave potential of 0.887 V, a Tafel slope of 67 mV dec−1, and robust stability, which are comparatively better than the precious metal catalyst (Pt/C). Conclusively, this study delivers a novel path for designing multiple crystal phases with improved catalytic performance for energy devices.
研究领域:
材料科学
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能源化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
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2019
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IF 5.383
Danping Li,Xun-an Ning,Yue Huang,Shengchuan Li
Novel two-dimensional carbon nitride hexagonal-like sheets were fabricated from thermal condensation , which uses hexaazatriphenylene-based precursor prepared microporous and oxidation resistant carbons materials (HAT-CN). The results show that the as-prepared HAT-CN is the first electrode utilized in capacitive deionization, due to the rich heteroatom and border-group content, as well as the potential collaborative effect of C and N atoms, displaying the quick ion diffusion and strong charge transfer performance. Additionally, the capacitive deionization performance of HAT-CN is improved by the synergistic contribution of a large accessible surface area, large pore volume, and high graphitization. The electrode of HAT-CN was carbonized at 550 °C which display an excellent specific capacitance of 179.2 F g −1 in 1-M NaCl solution at a scan rate of 5 mV s −1 . Subsequently, a high salt adsorption capacity of 24.66 mg g −1 was attained for an applied voltage of 1.2 V in 500 mg L −1 NaCl solution, showing good cyclic stability at 30 cycles. Considering those excellent properties of the prepared HAT-CN, the capacitive deionization electrode should be an ideal candidate for high-performance deionization application.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Qingmiao Zhang,Tianhao Yao,Yanni Chen,Xunan Jing,Xiaoping Zhao,Daquan Wang,Hongkang Wang,Lingjie Meng
Transition metal oxides as potential anodes of lithium-ion batteries (LIBs) possess high theoretical capacity but suffer from large volume expansion and poor conductivity. To overcome these drawbacks, we designed and fabricated polyphosphazene-coated yolk-shelled CoMoO 4 nanospheres , in which polyphosphazene with abundant C/P/S/N species was readily converted into carbon shells and provided P/S/N dopants. This resulted in the formation of P/S/N co-doped carbon-coated yolk-shelled CoMoO 4 nanospheres (PSN-C@CoMoO 4 ). The PSN-C@CoMoO 4 electrode exhibits superior cycle stability of 439.2 mA h g −1 at 1000 mA g −1 after 500 cycles and rate capability of 470.1 mA h g −1 at 2000 mA g −1 . The electrochemical and structural analyses reveal that PSN-C@CoMoO 4 with yolk-shell structure, coated with carbon and doped with heteroatom not only greatly enhances the charge transfer rate and reaction kinetics, but also efficiently buffers the volume variation upon lithiation/delithiation cycling. Importantly, the use of polyphosphazene as coating/doping agent can be a general strategy for developing advanced electrode materials.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DIAMOND AND RELATED MATERIALS
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2023
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IF 4.1
Zhentao Bian,Juncai Chu,Jianmin Liu,Xuanxuan Zhao,Yanyan Zhu,Yaning Zhang,Yang Song,Chong Chen,Xin Zhuo,Keying Zhang
The urgent need for sustainable energy development is contingent on pollution-free technologies, which has sparked widespread interest in exploring environmentally favorable methods employing inexpensive and abundant starting materials. In this study, 3D honeycomb-like hierarchical porous carbons were prepared using a green molten salt activation method, with renewable biomass waste cotonier catkin (CC) as the carbon source and non-toxic salt KHCO 3 as the activating agent and were used as electrodes for supercapacitors . Specifically, the optimal CC-HPC-1:3 sample has a 3D honeycomb-like structure with a high specific surface area (970.5 m 2 g −1 ) and a relatively applicable pore volume (0.54 cm 3 g −1 ) as well as abundant multi-heteroatoms doping (nitrogen: 3.64 at. %, oxygen: up to 11.22 at. %). As anticipated, the CC-HPC-1:3 electrode exhibits intriguing electrochemical properties in aqueous solution, including an excellent specific capacitance of up to 284.5 F g −1 at 0.5 A g −1 , good rate capacitive behavior (194.2 F g −1 retain at 10 A g −1 ) and low resistance. Notably, the assembled symmetric supercapacitors based on CC-HPC-1:3 carbon materials with a wide voltage window of 1.8 V result in a high energy density of 16.1 Wh kg −1 at 180 W kg −1 and good stability with a capacitance ratio >96 % after 10,000 cycles. Our work presented a very competitive strategy for synthesizing sustainable new green electrode materials for high-performance and low-cost energy storage devices due to the simple and environmentally friendly preparation of CC-HPC.
研究领域:
材料科学
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能源存储
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Lulu Song,Caixia Sun,Yongqiang Wang,Zhenyi Huang,Yongpeng Zhao,Shengling Yuan,Yahong Zhang,Wenzhen Xia
Impedance mismatch severely limits the performance of electromagnetic (EM) microwave absorber materials. Aiming at addressing this issue, this study proposes a strategy combining structure and phase engineering to design gradient manganese dioxide (MnO 2 ) core@shell composites. The core of the composites comprises cadmium (Cd)-doped α-MnO 2 nanowires, synthesized via a self-assembly process achieved using the hydrothermal method, which possess remarkable dielectric attenuation capability that can effectively consume EM energy. The shell comprised α-MnO 2 nanosheets, which serve as a matching layer and introduce interfaces and defects that further enhance EM energy attenuation; notably, these α-MnO 2 nanosheets are formed through calcination-induced phase transition of δ-MnO 2 nanosheets grown on the core nanowire surface. The uniform growth of nanosheets on nanowires is facilitated by the low lattice mismatch between α-MnO 2 and δ-MnO 2 . The resulting Cd-doped α-MnO 2 nanowire@α-MnO 2 nanosheet composites deliver remarkable absorption performance; the minimum reflection loss can reach − 50.50 dB and effective absorption bandwidth reaches 5.44 GHz in the Ku band, which are attributed to optimized synergy between attenuation and impedance matching, dipole polarization enhancement through heteroatom doping, and interfacial polarization at the core–shell interface. This study provides a novel approach to designing advanced EM absorption materials.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
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IF 5.1
Lili Zhao,Yongjian Zhu,Xinghao Long,Wenbo Liao,Bing Hu,Rongrong Miao,Gang Zhang,Guanghong Sun,Yufeng Xie,Lei Miao
Electrochromic (EC) smart window can dynamically alter optical property under the electric field, showing great potential in building energy conservation. Nickel oxide (NiO) acts as one of the most promising EC candidates while suffering insufficient reaction sites and low electrical conductivity . Herein, we introduced Mn 2+ ions into NiO for the heteroatom doping towards improved EC performance. As expected, NiO–Mn–3 film exhibited optimal transmittance modulation (81.8 %) and fast coloring/bleaching time (3.5/5.1 s), which were considerably related to the improved specific surface area and increased electronic conductivity. Electrochemical characterization confirmed that the enhanced ions diffusion coefficient and lowered resistance delivered a positive impact on boosting the EC property. Mott–Schottky study also confirmed that the heteroatom doping effectively increased the carrier concentration. Our results not only provided important insight into a promising electrode material for EC energy–saving application, but also offered an economic and effective synthetic strategy for other doped metal oxide films .
研究领域:
材料科学
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能源技术
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 7
·8295-8303
·
IF 2.478
Meng Yanshuang,Lin Renpeng,Duan Mingtao,Du Mengqi,Zhang Hongshuai,Ren Guofeng,Zhu Fuliang
Heteroatom doping was considered as an effective strategy to improve the electrochemical performance of carbon anode material for sodium-ion batteries (SIBs). In this work, heteroatom (N, P and O)-doped nanoporous carbon (HDNPC) was obtained through a simple pyrolysis process using ionic liquid as a source of heteroatoms. The synergistic effect of nanoporous structure and the heteroatom doping in the carbon framework provides the HDNPC with abundant defects and active sites, enlarged interlay space and short ion diffusion distance, which favor Na + intercalation/deintercalation and thus improve the specific capacity and rate performance of the HDNPC. As a result, when used as anode material for SIBs, the HDNPC exhibits reversible capacities of 226.6, 200.2, 173.9, 155.6, 137.4 and 126.8 mAh g − 1 at 0.1, 0.2, 0.5, 1, 2 and 3A g − 1 , respectively, and delivers a capacity of 114.3 mAh g − 1 at a current density of 5.0 A g − 1 after 500 cycles.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 6
·2780-2786
·
IF 10.733
Zhen Zhang,Ping Li,Qi Wang,Qi Feng,Youkun Tao,Jiaoyan Xu,Cheng Jiang,Xiner Lu,Jiantao Fan,Meng Gu,Hui Li,Haijiang Wang
As a cheaper Pt-group metal, ruthenium (Ru) is a highly competitive alternative to Pt for commercialization towards the hydrogen evolution reaction (HER). Herein, we report the modulation effect on the Gibbs free energy (ΔGH*) of hexagonal-close-packed (hcp) Ru resulting from heteroatom Mo doping. In particular, for the first time the hcp MoRu3 crystal structure is theoretically predicted with pretty high intrinsic HER activity. Meanwhile, the Mo hetero-dopant could act as a new active site with Pt-like ΔGH*. Motivated by the prediction, we report a novel metal organic framework (MOF)-assisted synthetic strategy to prepare a Mo-doped hcp Ru electrocatalyst. Accordingly, the hcp MoRu3 catalyst exhibits an ultralow overpotential of 30.5 mV at 10 mA cm−2, ensuring excellent Pt-like intrinsic HER activity. More importantly, the excellent electrochemical performance measured with a proton exchange membrane (PEM) electrolyzer further highlights the promising potential of the hcp MoRu3 catalyst for hydrogen production.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2021
·
IF 17.881
Rui Qi,Mihai Chu,Wenguang Zhao,Ziwei Chen,Lei Liao,Shisheng Zheng,Xiping Chen,Lei Xie,Tongchao Liu,Yang Ren,Lei Jin,Khalil Amine,Feng Pan,Yinguo Xiao
Sodium-ion batteries (SIBs) with iron- and manganese-based cathode electrodes have exhibited great promise in the grid-scale energy storage systems , on the basis of the satisfactory theoretical capacity, as well as huge abundance, low price and non-toxicity of raw materials. However, the inferior cycle life of cathode materials originating from their poor structural stability remains a formidable challenge towards practical applications. Here, an efficient strategy of improving the structure durability is demonstrated in iron- and manganese-based cathodes by dual heteroatom doping. The as-obtained P2-type Na 0.65 Li 0.08 Cu 0.08 Fe 0.24 Mn 0.6 O 2 cathode delivers superior cyclability (88.2% capacity retention for 500 cycles at 2C), fabulous rate capability (76% capacity retention at 5C compared to 0.1C), and a useable reversible capacity of around 85 mAh g −1 at 0.1C. Through in-depth characterizations, the underlying structure-property relationship is established, revealing that the complete solid-solution reaction during cycling ensures the ultralow volume variation (as small as 0.7%) and excellent electrochemical performance. These results highlight the significance of fabricating a stable host for the design and development of advanced SIBs with long life.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）