ELECTROCHIMICA ACTA
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2022
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IF 7.336
Xianchao Wang,Weirong Li,Yongchao Xu,Yanqin Xue,Dapeng Si,Runcheng Zhu,Junnan Liu,Chunliang Zhou,Ye Chen,Guiling Wang
NiCoP/C electrodes with hollow structure are prepared successfully by solvent thermal method and low temperature phosphorylation method, the effect of Co doping on the electrode performance is explored. The hollow sphere structure of NiCoP/C electrode brings out outstanding electrochemical properties. The results of electrochemical tests show that the NiCoP/C electrode delivers a specific capacity of 193.8 mAh g − 1 at 1 A g − 1 and only losses 6.7% capacity under a 5 A g − 1 of current density after 10,000 cycles. In addition, the asymmetric supercapacitor (ASC) device composed of NiCoP/C and activated carbon has an energy density of 53.7 W h kg −1 when the power density is 750 W kg −1 . The ASC device is also cycled for 10,000 cycles at a current density of 5 A g − 1 while the capacity loss is only 7.2%.
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
ELECTROCHIMICA ACTA
·
2019
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IF 5.383
Qingfeng Zhou,Yun Gong,Keyu Tao
Binary metal compounds have higher conductivity and richer redox reactions due to the co-existence and synergism of different transition metals. Besides, carbon in composite materials has the advantage of enhancing electronic conductivity to promote fast electron transmission. Herein, a series of Ni m P n /C, Ni 2 P/C, Co 2 P/C and Ni x Co 2-x P/C nanohybrids with different Ni/Co molar ratios were synthesized by in-situ calcination/phosphorization of MOF precursors. These nanohybrid materials were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, energy dispersive spectrometer and electrochemical tests. The NiCoP/C material possesses a granular structure with NiCoP nanoparticles anchored in a large number of carbon. Taking advantage of the bimetallic synergism and carbon anchoring effect, the as-prepared NiCoP/C sample delivers the most prominent specific capacities of 775.7C g −1 at 1 A g −1 , and 582.4C g −1 at 20 A g −1 (20-fold) with a superior rate capability of 75.1% retention, much superior to those of the corresponding Ni m P n /C, Ni 2 P/C, Co 2 P/C, other Ni x Co 2-x P/C samples and various reported metal phosphide nanostructures/nanocomposites. Furthermore, the constructed NiCoP/C//activated carbon asymmetric supercapacitor can exhibit a high energy density of 47.6 Wh kg −1 at a power density of 798.9 W kg −1 , which was superior to those previously reported of Ni/Co phosphide nanomaterials.
研究领域:
材料科学
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电化学
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能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
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IF 9.5
Xiaomeng Zhang,Xiaofeng Zhao,Buhe Bateer,Yanqing Jiao,Aiping Wu,Haijing Yan,Dongxu Wang,Jiaming Wang,Chungui Tian
High rate performance and cycling stability are crucial factors in the construction of electrode materials for supercapacitors. Herein, we designed and synthesized flower-like NiCoP assembled with nanosheets stabilized by carbon layers (NiCoP/C) through a ‘hydrothermal assembly-phosphating’ route. Nanolayers with rich pore channels can provide transport for a large number of ions (providing transport pathways for ions in the electrolyte, effectively reducing resistance during ion transport within the electrode), improve the specific surface area of electrode materials (increasing the contact area between the electrode and electrolyte, and thereby promoting charge transfer between the electrode and electrolyte), and enhance the structural stability. The conductivity of the 3D assembly NiCoP/C is high, similar to that of phosphides with enhanced mass/charge transfer, and it possesses good ability from the carbon coating and 3D structure to buffer any volume variation. These characteristics are favourable for application as electrode materials in supercapacitors. Under optimized conditions, the capacitance of the prepared NiCoP/C-2 is high (1261 F g−1 at a current density of 1 A g−1, 799 F g−1 at a current density of 10 A g−1) in a three-electrode system. The asymmetric supercapacitor assembled with NiCoP/C-2 as the positive material and N-doped porous carbon as the negative material exhibited excellent stability. After 8000 cycles, the discharge capacitance remained at 88.5%, presenting a high energy density of 40.06 W h kg−1 at 640 W kg−1.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
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IF 9.2
Xin-Zhi Tian,Bai-Rui Chen,Ao-Sheng She,Wei Wang,Wen-Ya Zhong,Hai-Long Wang,Chi Xing,Ke-Xian Li,Yi-Hong Wu,Xiao-Wei Wu,Bo Weng,Jia-Min Lu,Yan-Xin Chen
Facing the current energy crisis, developing new green energy and advancing high-quality energy development are crucial, as multimetal sulfide semiconductors have great potential in photoenergy conversion. This study prepared a carbon-containing bimetallic phosphide (NiCoP@C) cocatalyst from a CoNi-based MOF, which was combined with ZnIn 2 S 4 (ZIS) hollow nanoflowers to enhance electrical conductivity and photocatalytic hydrogen production of the composite. XPS shows electron cloud density of ZIS increases in the composite via interfacial electronic reconstruction. FESEM reveals NiCoP@C nanoparticles are evenly anchored on surface and interlayer gaps of ZIS, forming a hierarchical heterostructure with more active sites. Performance tests show Z-NiCoP@C has a photocurrent density of 129.58 μA cm −2 (vs. 34 μA cm −2 of unmodified ZIS). Under 10 W visible light with 10% TEOA as a sacrificial agent, 10-h cumulative H 2 yield of the composite is 19.52 mmol g −1 , with a H 2 evolution rate of 1.95 mmol g −1 h −1 , 7.8-fold that of pristine ZIS (0.25 mmol g −1 h −1 ).
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）