RSC Advances
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2014
·Vol. 4
·期 74
·39312-39315
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IF 3.708
Yanqing Lai,Fuhua Yang,Zhian Zhang,Shaofeng Jiang,Jie Li
Porous hollow carbon spheres (PHCSs) with high surface area and large pore volume were synthesised using a facile template method. After selenium (Se) encapsulation, Se/PHCS composite was formed. The obtained Se/PHCS composite was demonstrated as a suitable cathode material for lithium–selenium batteries.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
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IF 3.99
Bao-Shui Wu,Peng Wang,Shu-Hua Teng
Mesoporous carbon-coated iron oxide (α-Fe 2 O 3 @C) nanoparticles were hydrothermally synthesized by using α-Fe 2 O 3 nanospheres (ca. 50 nm) as the cores and resorcinol as the carbon source of the shells. The formation of the mesoporous carbon coatings was confirmed by means of SEM, TEM , FT-IR, TG, XPS and BET measurements. Moreover, the coating thickness was easily adjusted to be 4, 7 and 10 nm by changing the amount of resorcinol. When used as the anodes for lithium-ion batteries (LIBs), the α-Fe 2 O 3 @C nanoparticles exhibited significantly improved electrochemical properties as compared to pure α-Fe 2 O 3 nanoparticles. With the increase of the coating thickness, the α-Fe 2 O 3 @C electrodes presented an initial increase and subsequent decrease in their cycling stability and rate performance. Especially, the α-Fe 2 O 3 @C-7 nanoparticles displayed a high reversible capacity of 1223 mA h/g at 1 A/g, a good cycling stability retaining 1093 mA h/g at 1 A/g after 100 cycles as well as a remarkable rate performance of 570 mA h/g at 5 A/g. The quantitative kinetic analysis revealed that 58 % of the charge storage was contributed by the capacitive process at 0.5 mV/s. The well-defined core-shell structure and superior electrochemical performance of the α-Fe 2 O 3 @C-7 nanoparticles will make them a promising anode for LIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Wenlong Liu,Jianzong Man,Xiaodong Sun,Weijia Liu,Yehong Du,Qian Wang,Zhongsheng Wen,Song Li,Juncai Sun
lithium (Li) metal has emerged as one of the most promising anode materials for next-generation batteries, attracting considerable interest owing to its exceptional high energy density and specific capacity. However, severe volume expansion and dendritic growth during cycling critically hinder the practical application of Li metal anodes. Herein, a hollow carbon sphere-encapsulating cobalt oxide (CoO) core (CoO/CS) framework was fabricated through a layer-by-layer assembly and controlled etching approach, which effectively suppresses dendrite formation in Li metal anodes. Density functional theory (DFT) calculations reveal that the CoO core exhibits significantly higher Li adsorption energy compared to the graphite shell, demonstrating its preferential role in guiding Li deposition. COMSOL Multiphysics simulations demonstrate that the CoO core effectively optimizes the local current density distribution. Consequently, the Li + preferentially nucleates at the CoO core due to its lithiophilic character, sequentially filling the hollow carbon sphere's interior volume. The hollow architecture provides abundant nucleation sites and sufficient void space to accommodate deposited Li metal, effectively mitigating volume changes during cycling. The synergistic combination of the hollow carbon structure and lithiophilic CoO core enables exceptional stability (operation exceeding 1700 h). Finally, the full cell capacity of CoO/CS electrode shows significant improvement across various current densities.
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
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Fangfang Su,Xiaoqian Li,Yudeng Wang,Zhongjie He,Ling Fan,Hongni Wang,Jinliang Xie,Yaping Zheng,Dongdong Yao
Porous liquids (PLs) are a type of porous materials that combine the porosity of solids and fluidity of liquids, which has attracted widespread attention. In this paper, we report a new TypeⅠhollow carbon sphere-based porous liquids, which are constituted of hollow carbon sphere (HCS) as the porous host, polymeric ionic liquid (PILs) as the corona and poly(ethylene glycol) 4-nonylphenyl 3-sulfopropyl ether potassium salt (PEGS) as the canopy. The viscosity of PLs is 8900 mPa·s at 50 ℃ (like syrup), which has good fluidity. Under 3 MPa pressure conditions, the best CO 2 adsorption capacity of 450-P[VHIm]Br-PEGS and 450-P[VBBI]Cl-PEGS are 2.06 and 1.90 mmol/g at 25 °C, respectively, higher than PILs-PEGS. Under the same conditions, the CO 2 adsorption capacity of PLs is 10.5 times higher than that of N 2 . Therefore, HCS-based PLs have the potential for CO 2 /N 2 selective gas separation. Not only PILs and the anionic alkyl chain of the outer layer widen the liquid range of PLs, but also is suitable for preparing PLs with other cavity units.
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
DIAMOND AND RELATED MATERIALS
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2023
·
IF 4.1
Qiyan Lin,Yao Wang,Juan Du,Aibing Chen
Nitrogen-doped mesoporous hollow carbon spheres are crucial in energy storage and the strategy of converting the inexpensive polymer polyacrylonitrile (PAN) into hollow carbon spheres needs to be improved. In this study, polystyrene/polyacrylonitrile (PSPAN) composite spheres were subjected to silica/carbon shell isolation to prepare nitrogen-doped hollow carbon spheres. In the carbonization process , the pyrolysis of PSPAN lead to the cavity due to the total decomposition behavior of PS. Due to the isolation of silica/carbon shells, the formation of a molten state during the pyrolysis process of PAN can be effectively prevented, thus avoiding the agglomeration of carbon spheres, and obtaining dispersed and regular hollow carbon spheres. The pore structure and specific surface area of the material were adjusted by hydrolyzing tetraethyl orthosilicate on the template surface and introducing dopamine for polymerization after different times. The hollow structure, nitrogen doping characteristics and abundant mesopores endow the NHCS with high performance in supercapacitor .
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
SYNTHETIC METALS
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2015
·
IF 2.252
Kuiwen Shen,Fen Ran,Xuanxuan Zhang,Chang Liu,Naijie Wang,Xiaoqin Niu,Ying Liu,Dingjun Zhang,Lingbin Kong,Long Kang,Shaowei Chen
Nano-polyaniline (nano-PANI) was deposited on hollow carbon spheres (HCS) to prepare nano-PANI/HCS composites via in-situ chemical polymerization. The composites combined the high pseudocapacitance of nano-PANI and the excellent porous structure of HCS which were prepared by the carbonization of a cross-linked co-polymer, poly(styrene- co -divinylbenzene- co -methylacrylic acid). The structure and properties of the resulting composites were characterized by Fourier-transform infrared spectroscopy (FTIR) and nitrogen (N 2 ) adsorption measurements, and the electrochemical behaviors were examined in 1 M H 2 SO 4 aqueous solution. Morphology was studied by scanning electron microscopy (SEM) and transition electron microscopy (TEM). SEM and FTIR characterizations reveal that nano-PANI was successfully deposited on the surface of HCS; and electrochemical tests indicated that the nano-PANI/HCS composites exhibited a high specific capacitance of 435.0 F g −1 , along with good long-term cyclic stability (≈60% retention after 2000 cycles).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Ranran Guo,Zhaozhao Yang,Xiaosen Pan,Xiaojun Ma,Yujuan Qiu,Jie Li
Carbon-based supercapacitors with high performance have a wide foreground among various energy storage devices. In this work, wood-based hollow carbon spheres (WHCS) were prepared from liquefied wood through the processes of emulsification, curing, carbonization, and activation. Then, the hydrodeposition method was used to introduce nickel sulfide (NiS) to the surface of the microspheres, obtaining NiS/WHCS as the supercapacitor electrode. The results show that NiS/WHCS microspheres exhibited a core–shell structure and flower-like morphology with a specific surface (307.55 m2 g–1) and a large total pore volume (0.14 cm3 g–1). Also, the capacitance could be up to 1533.6 F g–1 at a current density of 1 A g–1. In addition, after 1000 charge/discharge cycles, the specific capacitance remained at 72.8% at the initial current density of 5 A g–1. Hence, NiS/WHCS with excellent durability and high specific capacitance is a potential candidate for electrode materials.
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
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Fulin Yang,Wei Qiao,Lice Yu,Shuli Wang,Ligang Feng
Hydrogen generation from methanol via methanol-assisted water splitting is a promising electrochemical energy conversion technology but still meets challenges in addressing the low intrinsic activity and easy poisoning problems of the conventional Pt catalysts. Herein, the support engineering modulated Pt by hierarchical MoSe 2 @mesoporous hollow carbon support was proposed to integrate some structural and catalytic advantages for hydrogen evolution reaction (HER) and methanol oxidation reaction (MOR). Supporting engineering by layered MoSe 2 nanosheets confined in mesoporous hollow carbon spheres (MHCSs) is adopted to uniformly anchor Pt nanoparticles (Pt/MoSe 2 @MHCS), which effectively enhances the conductivity and prevents the layer-by-layer stacking of MoSe 2 ; Strong interaction and coupling ability between Pt and MoSe 2 and the resultant electronic structure regulation of the active centers could weaken the binding strength of CO* and H* intermediates during catalysis and strengthen the oxophilicity leading to improved MOR and HER kinetics. Specifically, Pt/MoSe 2 @MHCS shows a significantly improved MOR current density of 81.1 mA cm −2 , about 3.0 times that of the benchmark Pt/C catalyst. Meanwhile, it also exhibits the HER performance of 28 mV to achieve a kinetic current density of 10 mA cm −2 in methanol-contained electrolytes. When employed for overall methanol electrolysis, a lowered input voltage of 1.11 V can be obtained to drive the current density (10 mA cm −2 ) compared to that for water electrolysis (0.62 V vs. 1.73 V). The electrochemical properties of high activity, rapid catalytic kinetics, and good stability were also demonstrated due to the enhanced oxophilicity and high poisoning tolerance ability resulting from the MoSe 2 /carbon substrate-induced electron redistribution of Pt sites. This work reports a novel platform to address the catalysis challenges in hydrogen production via the methanol electrolysis technique.
研究领域:
材料科学
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电化学
·
能源转换技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2019
·
IF 8.355
Weizheng Li,Bingyu Li,Ming Shen,Qiang Gao,Jianhua Hou
A series of N-doped porous carbon materials with open interconnected mesoporous shells and various mesoscopic morphology were synthesized by using the cationic Gemini surfactant pentane-1,5-bis(dimethylcetyl ammonium bromide) as the soft template through a sol-gel method and the mechanism of interfacial reaction was explored. The controllable morphological structure (particle size, shell thickness and interconnected structure of internal cavities in carbon nanospheres) can be easily achieved by simply adjusting the volume of ethanol and the amount of cationic Gemini surfactant. The synthesized N-doped mesoporous hollow carbon spheres (NMHCSs) exhibit the characteristics of small and tunable particle size (30–140 nm), ultrahigh surface area (1215–1517 cm 2 g −1 ) and large pore volume (1.12–3.22 cm 3 g −1 ), open interconnected hierarchical mesoporous (5–20 nm), high proportion doping of heteroatoms N (4.16–6.74 at.%) and O (6.17–8.68 at.%). The representative NMHCSs as electrical double layer capacitors electrodes in 6 M KOH electrolyte display an excellent electrochemical specific capacitance (240 F g −1 at 0.2 A g −1 ), superb capacitance retention (161 F g −1 at 20 A g −1 ), and excellent cycle stability (92% capacitance retention at 10 A g −1 after 5000 cycles). This research develops a simple synthesis strategy for a series of N-enriched carbon materials which exhibit promising application prospects for high-performance supercapacitors.
研究领域:
材料科学
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能源存储
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Haoxiang Zhong,Lingzhi Zhang
The low sulfur utilization and the serious shuttle effect of polysulfides severely hamper practical application of Li-S batteries. Herein, sulfur cathodes with the multi-functional structures, featured with double-layered hollow carbon sphere with up to 50 nm interlayer space (DLHC-50) in situ grown Co-SnS catalytic layer is designed and synthesized for lithium sulfur batteries. Co-SnS/DLHC-50 can encapsulate 72% sulfur, higher than 63% for Co-SnS/DLHC-20 due to the large interlayer spaces of DLHC-50. Meanwhile, polysulfides are also effectively restricted via physical entrapment from DLHC-50 as well as chemical binding between Co-SnS and polysulfides. Benefiting from the well-constructed host framework, Co-SnS/DLHC-50 @S shows higher specific capacity/capacity retention of 760.4 mA h g −1 /72.9% after 500 cycles at 0.5 C, than that of 546.5 mA h g −1 /62.2% and 668.9 mA h g −1 /62.2%, for DLHC-50 @S, and Co-SnS/DLHC-20 @S, respectively. In addition, the strategy can be also extended to prepare other metal oxides (sulfides)/DLHC-50 for wide applications. Therefore, this work demonstrates a promising route to combat some bottlenecks such as low sulfur utilization, and the shuttle effect of polysulfides for Li-S batteries.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2018
·
IF 3.927
Pengchao Hou,Guangjian Xing,Leyuan Tian,Gang Zhang,Hao Wang,Chunna Yu,Yongliang Li,Zhenglong Wu
The development of high-performance adsorbents for water purification is of utmost importance. Herein, we report the construction of a 3D graphene hybrid aerogel integrated with hollow carbon spheres via a two-step synthetic strategy. The structure and morphology of the hollow carbon spheres/graphene aerogels (HCSs/GAs) were characterized using BET, XRD, FTIR, Raman, XPS, and FESEM. The HCSs/GAs monoliths with high surface area (356.1 m 2 g −1 ) were utilized as an effective adsorbent for the removal of methyl orange (MO) and rhodamine B (RhB) dyes, organic solvents and oils from aqueous solutions. The HCSs/GAs demonstrated remarkably broad-spectrum adsorption performance with a high capacity for MO (344.1 mg g −1 ) and RhB (441.5 mg g −1 ), and up to 58–108 times its own weight for oils/organic solvents. Furthermore, the HCSs/GAs showed a rapid adsorbing ratio and superior recycling stability for oils/organic solvents. The adsorption kinetics of the HCSs/GAs were investigated and were well-fitted by the pseudo-second-order kinetics model. The high performance of the HCSs/GAs is related to its interconnected 3D hierarchical porous framework, high surface area and large pore volume. Therefore, the HCSs/GAs are believed to be a promising adsorbent for wastewater treatment.
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
Journal of Energy Storage
·
2025
·
IF 9.8
Yahui Xu,Hanbo Wang,Zikai Wang,Yan Wang,Dongyu Zhu,Ziming Wang,Kechang Li,Yumei Tian,Haiyan Lu
Hollow carbon spheres (HCSs) attracted increasing attention in the field of supercapacitor materials owing to their unique hollow structure. However, their hollow shells exhibited weak mechanical strength and tended to collapse under high-rate cycling. In this study, a nitrogen/sulfur co-doped hollow carbon sphere (NS-HCS) with tunable shell thickness was synthesized by adjusting the shell thickness and dopant loading. The optimized NS-HCS-1 integrated double-layer and pseudocapacitive storage while retaining the intrinsic high-power characteristics of carbon materials. The appropriate shell thickness enhanced structural durability, whereas N and S doping enriched the pore structure, accelerated ion transport, and provided additional pseudocapacitance, thereby improving electrochemical performance. In a three-electrode system, the material delivered a specific capacitance of 366 F g −1 at 1 A g −1 and retained 98.42 % of its initial capacitance after 20,000 cycles at 15 A g −1 . The assembled symmetric cell achieved a maximum energy density of 34.08 Wh kg −1 and a power density of 570 W kg −1 . This synergistic engineering of shell thickness and heteroatom doping afforded outstanding electrochemical performance, rendering NS-HCS-1 a promising electrode candidate for next-generation supercapacitors.
研究领域:
材料科学
·
电化学
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纳米材料
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能源存储
·
功能材料
✓ 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）