JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Songwen Fang,Jing Li,Cuili Xiang,Yongjin Zou,Fen Xu,Lixian Sun,Jian Zhang
Newly developed functional materials for energy storage have attracted considerable attention because of rapidly increasing global energy consumption and environmental problems. In this study, a polycyclic aromatic hydrocarbon, perylene-3,4,9,10-tetracarboxylic dianhydride was used as a precursor to a three-dimensional (3D) carbon sponge (CS). Subsequently, the sea urchin-like cobalt-nickel carbonate hydroxide (NiCo–CH) was anchored on CS by a hydrothermal method , using urea as a stabilizer and alkali source. The obtained CS/NiCo–CH composite demonstrated excellent electrochemical performance with a specific capacitance of 643 F g −1 (1 A g −1 ) and outstanding cycle stability (84.2% of the initial capacitance was retained after 3000 charge/discharge cycles). In addition, an asymmetric supercapacitor constructed using CS/NiCo–CH and activated carbon as positive and negative electrodes, respectively, exhibited a high specific capacitance of 131.6 F g −1 at 1 A g −1 and high energy density of 38.4 Wh kg −1 at 724.1 W kg −1 . The proposed CS/NiCo–CH composite may be used for electrochemical energy storage.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Xianzhi Yin,Kai Zhu,Ke Ye,Jun Yan,Dianxue Cao,Dongming Zhang,Jiaxin Yao,Guiling Wang
The direct urea fuel cell (DUFC) is a power generation equipment with urea-rich wastewater or urine as fuel source. It has the unique ability to purify sewage while simultaneously generating electricity, making it a highly efficient and environmentally friendly option. In this paper, pomegranate seed-like Ni nano-blocks and Fe nanosheets were synthesized by electrodeposition and chemical reduction and attached to the carbonized melamine sponge matrix. The N -doped carbon sponge (NCS) provided a large number of polyhedral holes, which allowed for efficient gas escape through channels. The combination of Fe reduces the initial urea oxidation potential, reaction activation energy and reaction resistance. The synthesized FeNi supported on N -doped carbon sponge composite (FeNi@NCS) has a catalytic current density of 625 mA cm −2 and a Tafel slope of 42.51 mV dec −1 for urea electrooxidation reaction (UOR). Assembling the direct urine-hydrogen peroxide fuel cell (DUrHPFC) resulted in the highest performance output. The open circuit voltage (OCV) was 0.98 V, and the peak power density reached 9.61 mW cm −2 . The results show that the prepared catalyst provides an opportunity to solve the problems that hinder the development of urea green cycle at present.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2018
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IF 8.097
Peihao Li,Wei Wang,Sheng Gong,Fan Lv,Hanxin Huang,Mingchuan Luo,Yong Yang,Chao Yang,Jinhui Zhou,Chang Qian,Bin Wang,Qian Wang,Shaojun Guo
With its inherent zig-zag layered structure and open framework, Na2Ti3O7 (NTO) is a promising anode material for potassium-ion batteries (KIBs). However, its poor electronic conductivity caused by large band gap (∼3.7 eV) usually leads to low-performance KIBs. In this work, we synthesize the fluff-like hydrogenated Na2Ti3O7 (HNTO) nanowires grown on N-doped carbon sponge (CS) as a binder-free and current-collector-free flexible anode for KIBs (denoted as HNTO/CS). High-resolution X-ray photoelectron spectroscopy (XPS) and electron spin-resonance spectroscopy (ESR) confirm the existence of Ti–OHs and O vacancies in HNTO. The first-principles calculation discloses that both Ti–OHs and O vacancies are equivalent to n-type doping because they can shift the Fermi level up to the conduction band, thus leading to a higher electronic conductivity and better performance for KIBs. In addition, the N-doped CS can further reinforce the conductivity and avoid the aggregation of HNTO nanowires during cycling. As a result, the as-made HNTO/CS can deliver a capacity of 107.8 mAh g–1 at 100 mA g–1 after 20 cycles, and keep the capacity of 90.9% and 82.5% after 200 and 1555 cycles, respectively, much better than the samples without hydrogenation treatment or N-doped CS and reported KTixOy-based materials. Our work highlights the importance of hydrogenation treatment and N-doped CS in enhancing the electrochemical property for KIBs.
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
ADVANCED FUNCTIONAL MATERIALS
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2020
·Vol. 31
·期 3
·2006806
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IF 16.836
Ming-Bang Wu,Sheng Huang,Ting-Yu Liu,Jian Wu,Seema Agarwal,Andreas Greiner,Zhi-Kang Xu
Fast and efficient cleanup of crude oil spills is still a global challenge because most of the crude oils are highly viscous and lowly fluid. Herein, a kind of polydimethylsiloxane-decorated wood carbon sponges (PDMS@WCS) with desirable compressibility and hydrophobicity for the fast adsorption and enhanced recovery of crude oil via the promotion of Joule-heating and photothermal effect is reported. Moreover, the PDMS@WCS can be compressed and released at a constant strain of 50% for over times without structural damage due to the protection of PDMS coating. Thus, the adsorbed crude oil can be facilely excluded from PDMS@WCS under external pressure to show enhanced recovery.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2022
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IF 7.392
Haoquan Wang,Shan Su,Tao Yu,Chunfeng Meng,Hu Zhou,Wenjia Zhao,Shitan Yan,Ting Bian,Aihua Yuan
Rational design of metal/metal oxide hybrids embedded in heteroatom-doped carbon is a desired strategy to improve the kinetics of oxygen reduction (ORR)/evolution (OER) reactions. Herein, we present an elaborate method for preparing FeNi-based bimetallic alloy/oxide hybrids implanted in spongy-like N-doped carbon (S-FeNi/NiFe 2 O 4 @NC) via introducing FeNi Hofmann-type metal-organic frameworks (MOFs) as pyrolysis precursors. Impressively, the evenly distributed FeNi alloys coexisting with oxides are directly derived from bimetallic nodes in the MOFs, which are expected to boost the intrinsic electrocatalytic activity by multi-compositional synergism. Meanwhile, spongy-like N-doped carbon matrix would be effective for achieving rich metal active sites and rapid mass/electron transport. Accordingly, the obtained S-FeNi/NiFe 2 O 4 @NC-800 shows an extraordinary electrochemical activity with an ORR/OER potential gap of 0.76 V. In addition, the catalyst emerges outstanding stability with potential losses that are only half those of commercial reference catalysts for both ORR and OER after 10,000 cycles. Importantly, zinc-air battery assembled with S-FeNi/NiFe 2 O 4 @NC-800 delivers a high peak power density of 129 mW cm −2 and an excellent specific capacity of 837 mA h g −1 .
研究领域:
材料科学
·
电化学
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能源存储
✓ 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）