Geoenergy Science and Engineering
·
2023
·
IF 0
Jixing Wang,Zhongcong Zhao,Dongning Li,Xiupeng Guo,Jin Bao,Huaqiang Shi,Xinxing Ma,Xiaorong Yu
Hydraulic fracturing technology is widely used in the stimulation of oil reservoirs. However, the insufficiently broken of high-viscosity polymer that only serves the purpose of carrying proppant , which not only damages the permeability of fractures, but also causes a large amount of resource waste. Meanwhile, the high-density proppant is difficult to support micro-fractures, reducing oil and gas recovery. In response to these issues, this study designed a skeleton monomer SEC 3 R with a viscosity of 0.62 Pa s as the active monomer, and through the selection of crosslinking agents and initiators, a liquid-solid phase change self-supporting fracturing fluid was developed. It was found that when the volume ratio of phase change liquid and non-phase change liquid was 1:2, the total proportion of proppant in 20–40 mesh and 40–70 mesh was the highest, which was 96.64%. Compared to quartz sand and ceramsite proppants, liquid-solid phase change proppants have a more regular sphericity and smoother surface, which gives it better conductivity. The conductivity of liquid-solid phase change proppants with 20–40 mesh and 40–70 mesh under a closure pressure of 10 MPa was 123.50 and 39.89 μm 2 cm, respectively, and under a closure pressure of 40 MPa, the conductivity was 15.86 and 9.62 μm 2 cm, respectively. Its long-term conductivity was better than that of quartz sand proppant and similar to that of ceramsite proppant.
研究领域:
石油工程
·
材料科学
✓ 已验证
DOI
IONICS
·
2025
·
IF 2.6
Zheng Rongsheng,Guo Yanping,Liang Longsheng,Liu Ao,Guo Rongrong,Huang Xiaohua,Luo Hao,Yang Yulin,Cheng Zaijun
Among the various carbon-based electrode materials, carbon nanofibers (CNFs) have emerged as a promising and indispensable candidate for zinc-ion hybrid capacitor (ZIHC) applications due to their unique structural and electrochemical properties. In this study, a facile and scalable strategy was developed to fabricate self-supporting, lightweight, and hierarchically macroporous activated carbon nanofiber electrodes (CZ-HPCNFs). Hollow CZ-HPCNFs nanostructures featuring enlarged specific surface areas and well-developed internal porosity were successfully fabricated through the dual strategy of employing calcium carbonate as a removable template and zinc chloride as a pore-forming agent, thereby achieving a synergistic integration of macroporous and microporous architectures. This hierarchical porous architecture facilitates rapid ion transport and provides abundant electrochemically active sites, thereby significantly enhancing both the specific capacity and rate performance of the resulting ZIHCs. As a result, the fabricated cell employing CZ-HPCNFs as the cathode delivers a notable specific capacity of 208 mAh g −1 at 0.1 A g −1 . Impressively, it maintains 95.6% of its initial capacity after 30,000 cycles. In addition, the template dispersion modulation strategy introduced in this study presents a flexible and broadly applicable framework for the engineered construction of porous electrode materials, offering significant potential for integration into next-generation energy storage technologies.
研究领域:
材料科学
·
电化学储能
·
纳米材料应用
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Shouzhi Yan,Dongdong Shen,Md All Amin Newton,Suiyuan Zhu,Binjie Xin
Self-supported nanofiber membranes were fabricated by the rhombus-patterned collector in the electrospinning process in this work. The rhombus nanofiber networks were used to retain the mechanical flexibility of the device and stable responses such as bending and winding deformation. A resistive humidity sensor was developed by applying hydrophilic PANI with varying contents onto nanofiber surfaces through in situ polymerization, serving as electrodes. In this context, the self-supported membranes serve dual roles as both the sensing material and the substrate for the sensor. A comprehensive assessment was conducted to analyze how variations in relative humidity affect the sensing characteristics of the acquired sensors. By facilely regulating the ratio of dopant and oxidant concentration to monomer concentration in the polymerization process, the response of the sensors was increased from 49% to 83% with increasing relative humidity from 13% to 93%, good linearity (R 2 = 0.97) and a short response/recovery times (33/88 s). The prepared sensors exhibited appreciable mechanical properties and showed outstanding stability after 1000 cycles of bending and the resistances only slightly increased by 2.5%. Moreover, the sensor can monitor both human respiration and non-contact skin humidity. Its exceptional performance makes it easily integrable into textiles for the creation of wearable electronics.
研究领域:
材料科学
·
传感器技术
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Enhao Zhang,Sisi Yao,Xiaoxuan Guo,Xinyi Zhou,Yutai Li,Feifan Xie,Yonghang Wei,Dongjiang Yang,Jin Sun,Yun Lu
The advancement of highly efficient bifunctional electrodes tailored for water electrolysis, specifically targeting the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), is pivotal for sustainable hydrogen production. However, sluggish reaction kinetics and elevated overpotentials pose formidable hurdles. In this study, an innovative strategy is introduced by integrating Fe@ZIF-67 onto self-supporting carbonized rattan stem (CR), leveraging its distinctive through-channel macroporous architecture to bolster catalytic efficacy. The self-supporting CR substrate not only enhances mass transport but also facilitates uniform deposition of ZIF-67, ensuring optimal exposure of active sites. A comparative analysis with carbonized basswood (CW) underscores the superior performance of the macroporous CR substrate in augmenting both OER and HER activities. Notably, the Fe@ZIF-CR self-supported electrode achieves an overpotential of 208 mV at 10 mA cm⁻² for oxygen evolution and 317 mV at 100 mA cm⁻² for hydrogen evolution. Additionally, the self-supporting nature of the CR substrate guarantees long-term stability and mitigates catalyst loss during operation. These findings underscore the synergistic advantages of the macroporous structure and ZIF-67 active sites, offering fresh perspectives on the utilization of biomass-derived carbon materials in sustainable energy technologies.
研究领域:
材料科学
·
可再生能源
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2024
·Vol. 14
·期 5
·296
·
IF 3.8
Tianshui Li,Wei Liu,Huijun Xin,Qihao Sha,Haijun Xu,Yun Kuang,Xiaoming Sun
Water electrolysis is a crucial technology in the production of hydrogen energy. Due to the escalating industrial demand for green hydrogen, the required electrode size for a traditional alkaline water electrolyzer has been increasing. Numerous studies have focused on developing highly active oxygen evolution reaction (OER) catalysts for water electrolysis. However, there remains a significant gap between the microscale synthesis of catalysts in laboratory settings and the macroscale preparation required for industrial scenarios. This challenge is particularly pronounced in the synthesis of sizable self-supported electrodes. In this work, we employed a commercially available Raney Ni-coated Ni mesh as a precursor material to fabricate a self-supported NiFe(OH)x@Raney Ni anode with a substantial dimension exceeding 300 mm through a straightforward immersion technique. The as-prepared electrode exhibited remarkable electrocatalytic OER activity, as an overpotential of only 240 mV is required to achieve 10 mA cm−2. This performance is comparable to that of NiFe-LDHs synthesized via a hydrothermal method, which is difficult to scale up for industrial applications. Furthermore, the electrode demonstrated exceptional durability, maintaining stable operation for over 100 h at a current density of 500 mA cm−2. The large-scale electrode displayed consistent overpotentials across various areas, indicating uniform catalytic activity. When integrated into an alkaline water electrolysis device, it delivered an average cell voltage of 1.80 V at 200 mA cm−2and achieved a direct current hydrogen production energy consumption as low as 4.3 kWh/Nm3. These findings underline the suitability of electrodes for industrial scale applications, offering a promising alternative for energy-efficient hydrogen production.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2020
·Vol. 39
·期 2
·181-188
·
IF 3.154
Cao Jiang-Yong-Quan,Chen Si-Chong,Zhang Jie,Xie Yang-Yang,Wang Yu-Zhong
Due to the important role of oil source in our life, the separation of water-in-oil emulsion is urgent and necessary. Membrane seperation technology has been an efficient and widely used method in separating oil-water separation. Herein, we report a versatile approach to fabricate surface carbonized membranes with self-standing property from biomass-derived precursor by synergistic charring of phytic acid, arginine and filter paper. The obtained membrane exhibited superhydrophobicity in oil, excellent fouling resistance, and self-supporting ability. The membrane can be cycle-used at least 12 times with high permeation flux (up to 1380 L·m −2 ·h −1 ) and separation efficiency (up to 99.4%).
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Bowen Lu,Yanhui Wang,Wei Li,Shiwei Song,Pengfei Tian,Rushuo Li,Xueqing Tian,Xiangyu Liu,Jianbing Zang
The development of self-supporting electrodes that exhibited both high efficiency and good durability remained a challenge in the field of hydrogen energy utilisation. Here, we designed a self-supporting 3D hierarchical porous electrode by filling carbon nanotubes (CNTs) loaded with Ni–P alloy into the framework of nickel foam (NF). Firstly, CNTs were decorated with a catalytically active Ni–P alloy via electroless plating (Ni–P@CNTs). Then, the Ni–P@CNTs were filled and anchored onto the framework of NF via electroplating to synthesise a self-supporting electrode (Ni–P@CNTs/NF). The Ni–P@CNTs/NF exhibited an excellent catalytic performance toward the hydrogen evolution reaction (HER) in 1 M KOH electrolyte, with an overpotential of 53 mV at 10 mA cm −2 , a small Tafel slope of 101.56 mV dec −1 and excellent long-term durability. This facile and effective strategy might provide a new path to the design of self-supporting electrodes with enhanced HER catalytic.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Guiru Sun,Qin Zhao,Tong Wu,Wei Lu,Mei Bao,Liqun Sun,Haiming Xie,Jia Liu
The development of self-standing and binder-free O2 electrodes is significant for enhancing the total specific energy density and suppressing parasitic reactions for Li–O2 batteries, which is still a formidable challenge thus far. Here, a three-dimensional foam-like composite composed of Mo2C nanorods decorated by different amounts of N-doped carbon (Mo2C-NR@xNC (x = 5, 11, and 16 wt %)) was directly employed as the O2 electrode without applications of any binders and current collectors. Mo2C-NR@xNC presents a network microstructure with interconnected macropore and mesoporous channels, which is beneficial to achieving fast Li+ migration and O2 diffusion, facilitating the electrolyte impregnation, and providing enough space for Li2O2 storage. Additionally, the coated N-doped carbon layer can largely improve the electrochemical stability and conductivity of Mo2C. The cell with Mo2C-NR@11NC shows a considerable cyclability of 200 cycles with an overpotential of 0.28 V in the first cycle at a constant current density of 100 mA g–1, a superior reversibility associated with the formation and decomposition of Li2O2 as desired, and a high electrochemical stability. On the basis of the experimental results, the electrochemical mechanism for the cell using Mo2C-NR@11NC is proposed. These results represent a promising process in the development of a self-standing and binder-free foam-based electrode for Li–O2 batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2016
·Vol. 51
·期 18
·8728-8736
·
IF 2.302
Huang Huabo,Yao Junlong,Li Liang,Zhu Fen,Liu Zhitian,Zeng Xiaoping,Yu Xianghua,Huang Zhiliang
In the present work, by using the in situ polymerization of aniline in acidic aqueous solution of PVA and freezing–thawing method, the reinforced conducting polymer hydrogel of polyaniline/polyvinyl alcohol (PANI/PVA) was prepared and directly used as the self-supported electrode for supercapacitor. The chemical structure of PANI/PVA hydrogel was characterized by UV–Vis, and the three-dimensional (3D) interconnected hierarchical nanoporous structure was observed by scanning electron microscopy. The measurement of compressive strength demonstrated the high mechanical strength of the hydrogel. The electrochemical properties of PANI/PVA hydrogel electrodes were evaluated by using cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge/discharge, which indicated their good responsiveness and rate capability, low resistance, high specific capacitance (240 F/g at current density of 1 A/g) and excellent cycling stability. The easily fabricated PANI/PVA hydrogel combined hierarchical nanoporous microstructure, self-supported feature and favorable capacitive behavior and provided a new strategy for constructing high-performance electrode for supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Liang Zhao,Shuijin Lei,Changcun Tang,Qunying Tu,Lihui Rao,Huanxi Liao,Weihang Zeng,Yanhe Xiao,Baochang Cheng
Two-dimensional (2D) layered materials hold great promise for electrochemical energy storage due to their unique structure. It is always desirable to explore new-type high-performance 2D structured electrode materials in energy field. In this work, layered transition-metal chalcogenophosphite is developed as the electrode material for supercapacitors for the first time. NiPS 3 nanosheet arrays are successfully in-situ grown on carbon cloth via a chemical vapor deposition method, and then directly used as the self-supported electrode for supercapacitors. The fabricated carbon cloth supported NiPS 3 nanosheet arrays offer obviously superior electrochemical performance to the powdery NiPS 3 nanosheets sample. The self-supported NiPS 3 electrode exhibits a high specific capacitance of 1148F g −1 at a current density of 1 A g −1 , and a good cycling stability with capacitance retention of 81.4% over 5000 cycles at 10 A g −1 . Moreover, the assembled asymmetric supercapacitor device delivers a specific capacitance of 61.3F g −1 at a current density of 1 A g −1 , and an energy density of 19.2 Wh kg −1 at a power density of 750 W kg −1 with a voltage window of 1.5 V. This work is of great significance for pioneering the application of 2D transition-metal chalcogenophosphites in supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Sustainable Systems
·
2022
·Vol. 6
·期 10
·2200196
·
IF 6.737
Haojie Shao,Yutong Wu,Xin Xu,Yuxi Xian,Yangyang Shi,Feihong Wang,Kai Lv,Chuntian Tan,Luyuan Hao,Binbin Dong,Simeon Agathopoulos
The industrial application of powder-based catalytic electrodes is heavily restricted by powder shedding, inhibition of active sites, and poor long-term stability. Herein, a porous titanium carbonitride (TiC 0.5 N 0.5 ) ceramic substrate with open straight finger-like holes is first made by a simple approach of phase-inversion tape-casting and pressureless sintering, and then a Co x Ni 1- x P active layer is in situ formed by a hydrothermal technique and phosphorization to achieve integrated Co x Ni 1- x P/TiC 0.5 N 0.5 self-supported ceramic electrodes. Electrochemical tests reveal that the optimized Co 0.9 Ni 0.1 P/TiC 0.5 N 0.5 electrode exhibits overpotentials of 76.5 and 79.8 mV at 10 mA cm −2 , Tafel slopes of 47.3 and 40.5 mV dec −1 , in 0.5 m H 2 SO 4 and 1 m KOH, respectively. Furthermore, its superior long-term stability and resistance to corrosion can be achieved for more than 20 h in both media at 100 mA cm −2 . In addition, the Co 0.9 Ni 0.1 P/TiC 0.5 N 0.5 electrode has much better performance than Pt/C at high current density in neutral media. Density functional theory calculations confirm that the Ni substitution of 1/10 Co in CoP leads to the more optimal |Δ G H* | among the Co x Ni 1- x P catalysts. Compared with other CoP or NiP-based electrodes, the Co 0.9 Ni 0.1 P/TiC 0.5 N 0.5 electrode benefits from high strength, unique pore structure, tight and compatible bonding, and high hydrophilicity.
研究领域:
材料科学
·
电化学
·
催化作用
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2022
·Vol. 12
·期 11
·1319
·
IF 4.501
Neng Chen,Sai Che,Hongchen Liu,Na Ta,Guohua Li,Fengjiang Chen,Guang Ma,Fan Yang,Yongfeng Li
The in situ growth of metal organic framework (MOF) derivatives on the surface of nickel foam is a novel type of promising self-supporting electrode catalyst. In this paper, this work reports for the first time the strategy of in situ growth of Ni-MOF, where the metal source is purely provided by a nickel foam (NF) substrate without any external metal ions. MOF-derived Ni2P/NPC structure is achieved by the subsequent phosphidation to yield Ni2P on porous N, P-doped carbon (NPC) backbone. Such strategy provides the as-synthesized Ni2P/NPC/NF electrocatalyst an extremely low interfacial steric resistance. Moreover, a unique three-dimensional hierarchical structure is achieved in Ni2P/NPC/NF, providing massive active sites, short ion diffusion path, and high electrical conductivity. Directly applied as the electrode, Ni2P/NPC/NF demonstrates excellent electrocatalytic performance towards both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), with low overpotentials of only 58 mV and 208 mV to drive 10 mA cm−2, respectively, in 1 M KOH. Furthermore, Ni2P/NPC/NF acting as the overall water splitting electrodes can generate a current density of 10 mA cm−2at an ultralow cell voltage of 1.53 V. This simple strategy paves the way for the construction of self-supporting transition metal-based electrocatalysts.Keywords:in situ growth;self-supporting;metal–organic framework;Ni2P/NPC;overall water splitting
研究领域:
材料科学
·
电化学
✓ 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）