INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 12
·17056-17067
·
IF 4.672
Tao Lyu,Shiying Lin,Lanlan Mo,Feijun Wang,Ziqiang Shao
Summary Natural polyelectrolyte complex has designable structure, unique advantages of composite and strong intermolecular or intramolecular force without chemical cross-linking agents, showing the advantages of good biodegradability and low toxicity. This work reports an application research of natural polyelectrolyte in energy storage device. A multi-doped hierarchically porous carbon is fabricated from polyelectrolyte of sodium lignosulfonate and chitosan and used as electrode material of supercapacitor. The material characterization reveals its large specific surface area of 1768 m 2 g −1 , pore volume of 0.94 cm 3 g −1 with optimum 3D porous structure, and high heteroatom (oxygen, nitrogen, and sulfur) concentration. Benefit from these, the electrodes it made exhibit 354 F g −1 specific capacitance at 1 A g −1 current density, outstanding rate retention of 82.9% at a testing environment of 20 A g −1 , and 97.8% capacitance retention in 3 M KOH electrolyte after 10 000 cycles. Using this material, all-solid symmetric supercapacitor devices show 30.11 Wh kg −1 energy density at 520.88 W kg −1 power density and retains 20.90 Wh kg −1 at 1.03 kW kg −1 . These remarkable electrochemical performances prove the promising porous carbon in this work as electrode material with excellent performance for supercapacitors.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
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功能材料
·
碳材料
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2020
·Vol. 44
·期 11
·8555-8566
·
IF 3.741
Li Yang,Yanping Yuan,Nan Zhang,Yanfang Dong,Yafen Sun,Wenhui Ji
Summary To make better use of solar energy, lauric acid/expanded graphite (LA/EG) composite phase change materials (PCMs) were synthesized to collect and store solar energy as latent heat thermal energy. The results of thermal characteristics show that when the mass fraction of EG is 5%, 10%, and 15%, the latent heat of LA/EG is 164.5, 156.9, and 148.0 J/g, and the thermal conductivity is 2.73, 7.98, and 10.54 W/(m·K). Leakage test shows that LA/EG PCMs with EG mass fraction of 10% and 15% are form stable after phase change. One thousand thermal cycles prove good thermal reliability of LA/EG. TG analysis indicates LA/EG PCMs have good thermal stability within operating temperature range. The Ultraviolet-visible spectra reveal that the absorbance of LA/EG composite PCMs would increase as the mass fraction of EG increases. Photothermal conversion experiment results indicate that the photothermal conversion efficiency of LA/EG composite PCMs increases as the mass fraction of EG increases, and the efficiency can reach 95% when the mass fraction of EG is 15%. Moreover, it was also found that the process of photothermal conversion can be accelerated with stronger illumination intensity or smaller heat transfer size. All the results show that the prepared LA/EG PCMs can convert solar energy into thermal energy and store it in the form of latent heat at the same time, which indicates it has promising prospect in the application of solar energy conversion and storage.
研究领域:
材料科学
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能源化学
·
热能工程
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功能材料
·
可再生能源
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2021
·Vol. 45
·期 11
·16538-16550
·
IF 5.164
Sanchao Liu,Huihui He,Dongyun Zhang,Chengkang Chang
Summary To improve the electrochemical performances of high voltage LiCoMnO 4 spinel cathode material at 5.3 V, Cr doped LiCoMn 1-x Cr x O 4 ( x = 0, 0.025, 0.050, 0.075) materials were synthesized by a one-step solid-state at 750°C. Rietveld refinement results showed that the phase purity of spinel is promoted with the increase in Cr concentration, which can be explained by the strong Cr O bond that reduces oxygen deficiency and eliminates Li 2 MnO 3 impurity phase during the synthesis process. Such change in phase purity further causes the improvement in specific capacity, and the 5.0%Cr doped sample displays the best result with a value of 123.0 mAh/g at 0.1°C and 93.3 mAh/g at 10°C. For a comparison, the pristine sample only releases a capacity of 112.6 mAh/g at 0.1°C and 54.8 mAh/g at 10°C. Improved capacity retention, from 83.1% to 90.1% after 100 cycles at 1°C, is also observed due to the suppressed volume change during the redox process after the incorporation of Cr cations in the lattice. Promoted rate performance, attributed from the improved Li ion diffusion coefficient, is also confirmed in the experiment. The improvement of those electrochemical properties could be explained by high-phase purity and superior structural stability benefited from Cr-doping. Novelty statement LiCoMn 1-x Cr x O 4 ( x = 0, 0.025, 0.050, 0.075) materials were synthesized by a one-step solid-state at 750°C, Chromium had been confirmed to reduce oxygen loss during LiCoMnO 4 synthesis due to high oxygen affinity of Cr, which improves phase purity. As a result, the specific capacity was increased. Cr-doping enhances the structural stability so that capacity retention was promoted due to higher bond energy of Cr O than Mn O; rate performance was also enhanced due to the improved diffusion coefficient.
研究领域:
材料科学
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电化学
·
储能
·
固态化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 10
·14534-14545
·
IF 4.672
Yicen Liu,Bing Zhu,Yan-gai Liu,Hang Zhao,Zekun Wang,Liming Wu,Xi Zhang,Jian Chen
Summary In this study, we synthesized a bimetal hydroxyl fluoride, Co 0.6 Zn 0.4 (OH)F, with an overlapping nanoneedle structure using a simple hydrothermal method. The synthesized Co 0.6 Zn 0.4 (OH)F was used as a new electrode material to study its electrochemical performance. Because of the synergy between Co and Zn and the high ionicity of fluorides, the Co 0.6 Zn 0.4 (OH)F electrode exhibited a discharge capacity of 1355.5 mAh g −1 during the first charging and discharging cycle. After 400 cycles at a current density of 2 A g −1 , the Co 0.6 Zn 0.4 (OH)F electrode showed an excellent specific capacity of 756 mAh g −1 . The Co 0.6 Zn 0.4 (OH)F electrode also exhibited an excellent capacitance contribution rate, indicating good rate performance. In addition, the hydroxyl and oxygen vacancies in the electrode material promoted the lithium/dilithium reactions. Therefore, Co 0.6 Zn 0.4 (OH)F is an excellent lithium storage material with high rate; thus, it has a certain potential application value in the future.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2021
·Vol. 45
·期 15
·21264-21273
·
IF 5.164
Lijie Zhang,Yihang Li,Binze Zhang,Yanhong Wan,Zheqiang Xu,Shaowei Zhang,Tenglong Zhu,Changrong Xia
Summary As a promising technology to address the energy storage challenge, reversible solid oxide cell (RSOC) plays a vital role in conversion between chemical energy and electrical power. Over the last several decades, developing high performance fuel electrodes suitable for reversible operation have attracted extensive attentions. This work develops La 0.1 Sr 0.85 Ti 0.35 Fe 0.6 Ni 0.05 O 3− δ which is an A-site deficient design with B-site having additional 5% nickel as the fuel electrode through in-situ metal exsolution. The in-situ exsolution process results in FeNi 3 alloy particles, about 40 nm in size, while maintaining the perovskite structure of the parent oxide. The FeNi 3 nanoparticles greatly improve the electrochemical performance as RSOC fuel electrode such as reducing the interfacial polarization resistance at 800°C by 13.6%, increasing the peak power density by 19% in the fuel cell mode and increasing the current density by 30% in the electrolysis mode. Furthermore, RSOC operation is demonstrated by 20-cycle reverse tests that are conducted by switching between the fuel cell and electrolysis modes. The stable RSOC performance indicates that La 0.1 Sr 0.85 Ti 0.35 Fe 0.6 Ni 0.05 O 3− δ with in-situ constructed FeNi 3 nanoparticles is a potential fuel electrode material for RSOC.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2021
·Vol. 45
·期 14
·20132-20142
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IF 5.164
Jiyan Li,Yanju Jing,Xu Zhou,Jialong Mao,Yujie Chen,Hanxue Sun,Xiaofeng Deng,Chengzhi Gao
Summary The application of solar-driven interface evaporation photothermal materials in the complex water environment is facing great challenges, and the development of multifunctional photothermal materials is great significance to the practical application process. In this study, a new kind of photothermal material was first prepared based on the natural pumices, which shows great advantages of lightweight, superhydrophilicity, porous property, and heat insulation. To improve its light absorption capacity and photocatalytic effect, carbon and Ag + were uniformly loaded on pumices (named P-C-Ag + ). The as-resulted P-C-Ag + shows an evaporation rate of 1.395 kg m −2 h −1 which refers to an evaporation efficiency of 88.80% in simulated seawater under 1 kW m −2 illumination. In the rooftop experiment, the cumulative evaporation capacity of the simulated solar evaporator with P-C-Ag + in 8 hours can reach about 7.25 kg m −2 . Meanwhile, almost no salt crystallization was found in the surface of P-C-Ag + during the continuous evaporation process. The P-C-Ag + has a good inhibitory effect on Escherichia coli and algae, and can degrade color dyes, which is also beneficial to water environment, thus holding great potential as multifunctional photothermal material for solar steam generation and water treatment.
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
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2020
·Vol. 45
·期 2
·3129-3141
·
IF 3.741
Xuelian Zhang,Ke Wang,Xin Zhang,Jianjiang Hu,Mingxia Gao,Hongge Pan,Yongfeng Liu
Summary High operation temperatures and slow reaction kinetics are major obstacles to use MgH 2 as a solid hydrogen store. We report here the synthesis of Nb 2 O 5 hollow spheres (o-Nb 2 O 5 ) with wall thickness of approximately 50 nm and mossy surfaces using a facile hydrothermal and calcination process, which showed high activity in catalysis of MgH 2 for hydrogen storage. The dehydrogenation onset temperature of MgH 2 was decreased to 195°C with 7 wt% of o-Nb 2 O 5 . More than 5.5 wt% H 2 can be desorbed at 300°C within 5 minutes. Hydrogen re-absorption starts even at 25°C and reaches 5.6 wt% within 5 minutes at 200°C. Practical hydrogen capacity stabilizes at 5.8 wt% after 10 cycles of hydrogen uptake/release. The o-Nb 2 O 5 was found to be reduced in situ by MgH 2 to low-valence Nb species during the initial dehydrogenation process, which functions as an active catalyst and leads to the enhanced dehydrogenation kinetics.
研究领域:
材料科学
·
催化
·
能源存储
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 15
·23480-23492
·
IF 4.672
Lingxin Meng,Zhenguo Zhang,Mengchi Ju,Jingmei Xu,Zhe Wang
Summary Organic-inorganic modification by incorporating metal-organic frameworks to copolymers is one strategy to advance the properties of membranes. Here, the imidazole-loaded MIL-101-NH 2 (Im@MIL-101-NH 2 ) was prepared and chemically anchored onto sulfonated poly (arylene ether ketone sulfone) containing carboxyl groups (C-SPAEKS). The chemical stabilities, mechanical properties, and dimensional stabilities of compound membranes were increased. The highest tensile strength of C-SPAEKS-IM6 reach to 105.36 MPa. The weight retention rate of hybrid membranes was still higher than 90% after the oxidation stability test at 80°C. Furthermore, the introducing Im@MIL-101-NH 2 could construct new proton transport paths, and the amphiphilic imidazole molecules embedded inside Im@MIL-101-NH 2 could act as proton carriers. The C-SPAEKS-IM6 showed a maximum proton conductivity of 0.082 S cm −1 at 90°C. Additionally, the peak power density of C-SPAEKS-IM6 was 171.52 mW cm −2 . To sum up, this series of membranes have latent capacity in the application of fuel cells. Im@MIL-101-NH 2 was anchored on polymer backbones via the Hinsberg reaction. Chemical bonds between MOFs and polymer chains improved compatibility of two phases. Cross-linking structure enhanced the mechanical property and oxidative stability. The sulfonamide groups could devote protons and transport it to MOFs.
研究领域:
材料科学
·
化学
·
能源工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 11
·15174-15181
·
IF 4.672
Yang Liu,Xuesong Cai,Dinggui Chen,Yan Qin,Yuan Chen,Jinxiang Chen,Chenglu Liang
Summary The large-scale applications of energy storage system via lithium-ion batteries (LIBs) put forward demands for high capacity, high safety, and low cost of materials. Covalent organic polymers have attracted extensive attention because of their high capacity, flexible structural design, high safety, abundance, and low cost. Here, 2,3,5,6-tetraamino-p-benzoquinone and hexaketocyclohexane octahydrate were chosen as monomers to construct the covalent organic framework (TH-COF) cathode materials with active C=O and C=N groups. The TH-COF was further composed with reduced graphene oxide (rGO) and the prepared TH-COF/rGO cathode provided a capacity of 135 mAh g −1 after 600 cycles at 1 C current density. In addition, after 100 cycles, the cathode delivered capacities of 118 and 73 mAh g −1 at the high current densities of 5 C and 20 C, respectively, displaying superior rate performances. The TH-COF/rGO electrode exhibited high capacity and stability, making it a promising cathode material for the next generation LIBs.
研究领域:
材料科学
·
能量存储
·
电化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2020
·Vol. 45
·期 4
·6041-6053
·
IF 3.741
Yanfang Xie,Fuzhong Wu,Xinyi Dai,Yi Mai,Yijing Gu,Huixin Jin,Junqi Li
Summary Nickel-cobalt-manganese ternary cathode materials are known as one of the most promising future cathode materials for Li-ion batteries (LIBs) due to their high discharge capacity, environmental friendliness, and low cost. In this paper, submicron LiNi 0.5 Co 0.2 Mn 0.3 O 2 (NCM523) primary particles with good crystallinity and dispersibility have been synthesized combine a coprecipitation method used ethanol as solvent with solid-phase sintering technology. A feeding strategy through separate dropping of sodium carbonate and ammonia is adopted; the structure and properties of NCM523 under different pH conditions are investigated. It is found that the NCM523 synthesized at pH = 8 (NCM523-8) exhibits a uniform particle size of about 300 nm, with good crystallinity. The NCM523-8 exhibits an excellent high-potential cycling performance, with an initial discharge capacity of 193.6 mAh g −1 at 0.2 C in the voltage of 3.0 to 4.5 V, and the capacity retention is 91% after 100 cycles. It also shows excellent rate performance with a reversible capacity of 130 mAh g −1 at 5 C. The superior high-potential electrochemical performance is attributed to the improved lithium-ion diffusion coefficient and stabilized structure by the special structural characteristics as evidenced by cyclic voltammetry, electrochemical impedance spectroscopy, and X-ray diffraction.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2020
·Vol. 45
·期 4
·6426-6435
·
IF 3.741
Yuhan Qiang,Lei Zhang,Shaofeng Shao,Jingfa Li
Summary The photo-responsive capability of lithium battery materials is a prerequisite to realize new-generation light-weight photo-rechargeable batteries. However, the photo-charging property is not available for common battery electrode materials such as LiFePO 4 . In this manuscript, we provide evidence that the halide perovskite material CH 3 NH 3 PbI 3 is able to activate the photo-charging properties of the lithium-ion battery electrode material LiFePO 4 . The photoelectrochemical measurement demonstrates that the photo-responsive property of the CH 3 NH 3 PbI 3 /LiFePO 4 composite is significantly improved; the photo-induced signals are neither observed in the individual halide perovskite nor the lithium battery material tested under the same condition. The first-principles calculations reveal strong interactions between the CH 3 NH 3 PbI 3 layer and the LiFePO 4 layer via the coordination between the Lewis acid and Lewis base species; this forms a heterostructure that assists the photo-charging process. We propose that the combination of halide perovskite materials and lithium battery electrode materials is a viable way to achieve light-weight photo-batteries. Suggestions to address the stability and voltage issues of the halide perovskite-based hybrid systems toward the photo-battery application are provided. This study facilitates the fundamental understanding of the integrated photo-rechargeable battery materials and highlights the importance of halide perovskite materials for the lithium-ion and photo-rechargeable batteries.
研究领域:
材料科学
·
能源科学
·
光电化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2026
·Vol. 2026
·期 1
·3671058
·
IF 4.2
Zihou Tian,Ziying Shao,Yukang Zheng,Pengfei Ban,Jiace Xue,Jinliang An
Phase change microcapsules (MCs) demonstrate significant application potential in thermal energy storage. However, conventional single-component shell materials exhibit limitations, including low mechanical strength, poor thermal conductivity, and inadequate sealing performance. In this study, octadecane was used as the core material, and four kinds of MC systems were constructed by interfacial polymerization and in situ polymerization: melamine–urea–formaldehyde (MUF) single shell, polyurea (PUA) single shell with nano-SiO 2 as Pickering emulsifier, MUF inner shell/PUA outer shell double shell, and PUA inner shell/MUF outer shell double shell. The packaging efficiency, thermal conductivity, leakage rate and heat-transfer characteristics of different structures are systematically compared. The results show that the comprehensive performance of the PUA inner shell/MUF outer shell double-shell structure is the best, the packaging efficiency is 76.2%, the thermal conductivity is 9.35% higher than that of pure PUA single shell, and the leakage rate is as low as 3.35% at 50°C for 20 h. The transient heat conduction simulation of ANSYS Fluent reveals the performance improvement mechanism: the heat conduction network formed by self-assembly of nano-SiO 2 at the oil–water interface accelerates the heat transfer, and the double-shell synergistic effect of “flexible inner shell attached to the core material and rigid outer shell provided protection” significantly inhibits the core material leakage. The collaborative optimization strategy of shell structure design and nano-Pickering emulsification proposed in this study provides a new technical path for realizing high sealing, high strength, and high thermal conductivity of phase change MCs at the same time and has application value in the fields of building energy saving and thermal management of electronic equipment.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）