INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2021
·Vol. 45
·期 7
·11179-11192
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IF 5.164
Muhammad Waqas,Afaque Manzoor Soomro,Shamshad Ali,Hina Ashraf,Abdul Sattar Chan,Suresh Kumar,Kyung Hyun Choi
Summary Highly efficient microporous composite separator based on polyvinylidene fluoride-hexafluoro propylene (PVDF-HFP) and colloidal La 2 O 3 (C-La 2 O 3 ) is prepared for high-temperature lithium-ion batteries (LIBs) through facile slide coating technique. The presence of colloidal La 2 O 3 nanocrystals in PVDF-HFP significantly enhances the mechano-thermal stability of separator due to the robust microporous structure. Moreover, the C-La 2 O 3 nanocrystals also help in improving the conductivity of lithium ions by incorporating additional Li + conduction pathways due to the Lewis acid-base interaction between La atom and PVDF-HFP chain. The PVDF-HFP/C-La 2 O 3 separator owns minimal shrinkage of 6.2% after thermal annealing for 1 hour at 150°C. The as-developed separator exhibits high wettability and electrolyte uptake (238%) due to the robust microporous structure and low crystallinity, which leads towards high ionic conductivity (0.75 × 10 −3 S cm −1 ). The cells developed with PVDF-HFP/C-La 2 O 3 separator deliver the discharge capacity of 158.2 mAh g −1 at room temperature, 163 mAh g −1 on direct testing at 80°C, 130.9 mAh g −1 of batteries assembled with annealed separators at 150°C for 5 hours, and 140.3 mAh g −1 of annealed batteries at 150°C for 5 hours at 0.5 C after 100 cycles with a capacity retention of ≈98%. The PVDF-HFP/C-La 2 O 3 separator is a promising substitute of commercial separators with remarkable performances for high-temperature LIBs.
研究领域:
材料科学
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能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2021
·Vol. 45
·期 9
·13040-13054
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IF 5.164
Peng Su,Hai Liu,Qingxiang Ma,Zhiliang Jin
Summary The photocatalytic hydrogen evolution reaction is one of the important ways to convert solar energy into renewable hydrogen. In this work, the Co 9 S 8 hollow polyhedron was formed after sulfidation and calcination with the metal-organic framework ZIF-67. The hollow polyhedron Co 9 S 8 provides abundant support sites for Mn 0.05 Cd 0.95 S and effectively reduces the agglomeration degree of Mn 0.05 Cd 0.95 S. The Co 9 S 8 hollow polyhedron as the reaction site has a large specific surface area and a mesoporous structure, which is beneficial to the progress of the photocatalytic reaction. A series of tests showed that the introduction of Co 9 S 8 hollow polyhedron significantly improved the light-trapping ability and exposed more reaction sites. Co 9 S 8 hollow polyhedrons are used as electron capture sites, which can effectively collect electrons and induce the interface charge transfer of Mn 0.05 Cd 0.95 S to Co 9 S 8 . Because the Co 9 S 8 -Mn 0.05 Cd 0.95 S composite catalyst had a strong light-trapping ability, abundant reaction sites and Co 9 S 8 -Mn 0.05 Cd 0.95 S heterojunction accelerate the separation and transfer of charges. Therefore, the hydrogen evolution rate of the 10%Co 9 S 8 -Mn 0.05 Cd 0.95 S composite catalyst was relatively high, which was 13.369 mmol g −1 h −1 . In addition, the 10%Co 9 S 8 -Mn 0.05 Cd 0.95 S composite catalyst still has good hydrogen evolution stability after four cycles. This research may supply a new idea for the preparation of high-efficiency photocatalysts with hollow structures. Novelty Statement The Co 9 S 8 hollow polyhedron provides abundant support sites for M 0.05 C 0.95 S particles, which effectively reduces the degree of agglomeration. The Co 9 S 8 -M 0.05 C 0.95 S heterojunction catalyst not only accelerates the migration and transfer of electrons, but also provides abundant reaction sites. Therefore, the Co 9 S 8 -M 0.05 C 0.95 S composite catalyst has good catalytic activity.
研究领域:
材料科学
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能源化学
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催化科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 13
·18624-18633
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IF 4.672
Honghong Cheng,Bo Li,Tao Meng,Cong Liu,Dong Shu
Summary Practical applications of graphene-based materials are still inhibited by the serious restacking of graphene nanosheets and single electrical double-layer capacitor energy storage mechanism. To address these issues, nitrogen/sulfur-co-doped reduced graphene oxide (N/S-rGO) was ingeniously prepared by supermolecular-driven in-situ co-dope method. In this article, the GO/L-cysteine supermolecular system was assembled first, the hydrogen bond between L-cysteine and GO is confirmed by the Fourier-transform infrared spectroscopy (FTIR). The theoretical calculation result indicating that L-cysteine is uniformly assembled on GO surface by supermolecular interaction force (dispersion force and hydrogen bond). Due to the oriented supermolecular force, the thus-fabricated N/S-rGO affords customized three-dimensional (3D) porous structure, uniform N,S co-doping, effective electrolyte ion-transport pathways, and satisfactory structural stability. Attributing to the inherent plentiful 3D cavity structure and synergistic effect between N, S heteroatoms, N/S-rGO shows outstanding electrochemical performance, the best-performed N/S-rGO2 possess delightful capacitance (416 F g −1 ), after 20 000 cycles the capacitance retention of N/S-rGO is 110% of the initial value, shows excellent cycle reliability. The N,S-rGO all-solid flexible symmetrical supercapacitor can light up luminous diode for 30 seconds when fully charged, indicating that it provides the possibility of practical application.
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
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2017
·Vol. 41
·期 15
·2555-2564
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IF 2.598
Zhao Wang,Shang Liu,Guixiang Ma,Shaolei Xie,Guangwei Du,Jinhe Sun,Yongzhong Jia
Summary To satisfy the application demands for latent heat storage in the temperature range from 5°C to 15°C, an original composite phase change material (PCM), CA-NA/EG (caprylic-nonanoic acid/expanded graphite), was prepared and characterized. For CA-NA/EG, the mass ratio of CA and NA was 8:2, and the mass percentage of the CA-NA in CA-NA/EG composite PCM was determined as 90% by leakage test. The melting and freezing points of the CA-NA/EG were 6.84°C and 9.34°C, and corresponding latent heats were 108.75 kJ/kg and 107.67 kJ/kg. In addition, its thermal conductivity, thermal stability and reliability were investigated by thermal conductivity apparatus (TCA), thermal gravimetric analyzer (TGA), and accelerated thermal cycle test for 100 melt/freeze cycles, respectively. The results showed that the CA-NA/EG had a good thermal stability and an excellent thermal reliability. Moreover, the thermal conductivity of CA-NA/EG had an improvement of 25% than that of the CA-NA. On the other hand, the accelerated thermal cycle test also indicated that the CA-NA/EG had no supercooling during all melt/freeze cycles. Therefore, the prepared composite PCM, CA-NA/EG, can be applied for low-temperature thermal energy storage owing to its proper melting temperature, acceptable latent heat and thermal conductivity, excellent thermal stability and reliability.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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2017
·Vol. 41
·期 14
·2063-2073
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IF 2.598
Haimiao Yu,Tong Ma,Yalan Shen,Dezhen Chen
Summary The study aims to analyze catalytic tar destruction, evaluate the activity of the Ni-based catalyst supported by waste iron slag, and obtain clean pyrolysis syngas. The effects of different nickel loadings, catalytic temperatures, and catalyst calcination temperatures on volatile were investigated in order to determine the optimal process condition. The analysis results showed that the iron slag Ni-based catalyst had a relatively low specific surface area. However, it showed an excellent resistance performance to the coke deposition and displayed the high tar removal ability. Moreover, the tar conversion and the yield of syngas were significantly affected by nickel loadings. When the nickel loading reached 3%, the tar dew point was decreased by nearly 100 °C and the tar conversion reached 94.84%. The favorable reaction temperature was about 800 °C based on the consideration of energy consumption and the catalytic performance. Calcination temperature affected tar yield and syngas yield. The application of iron slag in nickel catalyst realized the reutilization of waste materials, indicating significant practical values. Copyright © 2017 John Wiley & Sons, Ltd.
研究领域:
能源与环境科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2018
·Vol. 43
·期 1
·430-438
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IF 3.009
Xiuman Wang,Qian Zhang,Xiaofeng Shi,Ning Wang,Yujun Chai
Summary To analyze the effect of Co and Ni on hydrogen generation in water, the reactions of Mg and Al with water in CoCl 2 and NiCl 2 solutions are studied in terms of amount of H 2 produced and rate of reaction. Mg rapidly reacts with water in CoCl 2 and NiCl 2 , producing high amount of H 2 without induction time. While there is a short induction time is detected for Al─H 2 O reaction in CoCl 2 and NiCl 2 . In addition to the galvanic cell behavior of the Mg (Al)/Co (Ni) compounds formed, Co and Ni catalyze the hydrogen production reaction; however, the agglomeration of Co or Ni leads to a noticeable decrease in H 2 production. The open-circuit potential in CoCl 2 and NiCl 2 solutions after the addition of Mg or Al at ambient temperature shows an obvious change, coinciding with the initiation of the hydrogen generation process. Mg rapidly reacts with water in Co (Ac) 2 , CoSO 4 , Ni (Ac) 2 and NiSO 4 solutions as a consequence of its intrinsic metallic properties and of the formation of Co or Ni. The hydrogen production amount is lower (<200 ml g −1 ) in Co (NO 3 ) 2 and Ni (NO 3 ) 2 , even after adding NaCl. No reaction occurs when adding Al in CoSO 4 , Co (Ac) 2 , Co (NO 3 ) 2 , NiSO 4 , Ni (Ac) 2 , and Ni (NO 3 ) 2 . The synergistic effect of Co, Ni, and anion ions in water affects the rate of Al or Mg corrosion and hydrogen generation.
研究领域:
化学
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材料科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 6
·8313-8327
·
IF 4.672
Nianben Zheng,Fang Yan,Long Wang,Zhiqiang Sun
Summary Solar energy is being widely investigated due to its abundant, renewable, and clean features. Photo-thermal conversion in solar collectors is a direct approach for harvesting solar energy. Compared to the commonly used surface-based solar collectors (SSCs), nanofluid-based direct absorption solar collectors (DASCs) are more efficient. In this work, water-based mono MWCNT and hybrid MWCNT-TiN nanofluids were prepared through a two-step method, aiming at light absorption enhancement of nanofluids for applications in DASCs. The optical and photo-thermal conversion performance of the MWCNT nanofluids was firstly evaluated. The results showed that the MWCNT nanofluids presented high solar absorption capability, and the highest photo-thermal conversion efficiency was obtained at 10 ppm. The TiN nanoparticles were subsequently incorporated to form the hybrid MWCNT-TiN nanofluids. The absorption performance of the hybrid nanofluids was further enhanced. The highest efficiency of the hybrid MWCNT-TiN nanofluids was achieved at the TiN mass fraction of 10 ppm, which was about 6.9%, 6.0%, and 3.8% higher than that of the MWCNT nanofluid at 2000, 4000, and 6000 seconds due to the localized surface plasmon resonance (LSPR) effect of TiN nanoparticles. It was also found that the collector efficiency dropped rapidly with the prolonged irradiation time owing to the convection and radiation heat loss at the elevated temperature. Therefore, effective measures should also be taken to reduce heat loss to maintain high photo-thermal conversion efficiency.
研究领域:
太阳能
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纳米技术
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材料科学
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可再生能源
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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2022
·Vol. 46
·期 7
·8949-8961
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IF 4.672
Xinfei Fan,Haichao Mu,Yuanlu Xu,Chengwen Song,Yanming Liu
Summary Solar-driven interfacial evaporation is an emerging environmentally-friendly technology to produce freshwater, but the current interface evaporators are restricted by their high cost, complex fabrication processes, and low resistance to environmental conditions. Here, a low-cost and high-efficient evaporator was prepared simply by modifying natural wax gourd with polydopamine (PDA) and silver nanoparticles (AgNPs). The prepared AgNPs-PDA-wax gourd exhibited excellent light absorption (>94%) in the whole solar spectrum (300-2500 nm). Under 1 sun illumination, the prepared evaporator achieved an extraordinary evaporation rate of 1.70 kg m −2 h −1 (efficiency of 83.21%), which was 3.78 and 1.21 times higher than the rates of natural wax gourd and PDA-wax gourd, respectively. Such excellent performance was mainly attributed to the synergic light-to-heat conversion capability between localized surface plasmon resonance effect from AgNPs and enhanced light-adsorption ability from PDA. Due to the presence of AgNPs, the final evaporator also displayed a fascinating antibacterial behavior for both E. coli and S. aureus even during evaporating actual lake water. Meanwhile, the AgNPs-PDA-wax gourd presented good durability during 10-cycled experiments, seawater desalination, dye water purification and some extreme conditions (acid, alkaline and freezing). These results suggested the great potential for future practical applications of such biomass solar evaporators.
研究领域:
材料科学
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环境科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 11
·15709-15721
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IF 4.672
Qiuwan Shen,Zicheng Shao,Zhongwen Cai,Min Yan,Guogang Yang,Shian Li
Summary Methanol steam reforming (MSR) is a promising method for hydrogen production from renewable energy. The effect of λ-Al 2 O 3 support derived from metal-organic frameworks (MOFs) aluminum fumarate (A520) on the performance and stability of LaNi 0.4 Al 0.6 O 3-δ for MSR is investigated. Results demonstrate that compared with LaNi 0.4 Al 0.6 O 3-δ , LaNi 0.4 Al 0.6 O 3-δ /λ-Al 2 O 3 can achieve complete conversion of methanol and excellent thermal stability due to the higher S BET and strong interaction between the metal components and λ-Al 2 O 3 . Characterization results indicate that the LaNi 0.4 Al 0.6 O 3-δ /λ-Al 2 O 3 catalyst, which was not successfully reduced due to its robust structure, still has active sites for the MSR reaction. This characteristic of the catalyst has the potential to be applied for onboard in-situ hydrogen production, because it can shorten the time of hydrogen reduction process. Furthermore, the effects of catalytic temperature, feed water-methanol ratio, and liquid hourly space velocity on performance of LaNi 0.4 Al 0.6 O 3-δ /λ-Al 2 O 3 are studied in detail and the optimal conditions are determined and applied for stability tests.
研究领域:
材料科学
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催化化学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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2022
·Vol. 46
·期 12
·16979-16990
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IF 4.672
Jun Xiong,Zhihui Yang,Bo Wu,Ming Li,Xue Min
Summary Interface solar steam generation (ISSG) is a prospective and reliable option for producing freshwater from seawater and industrial wastewater. However, salts and heavy metal ions deposited on photothermal materials (PTMs) will diminish the evaporation rate. Besides, the low evaporation rate will limit the widespread application of ISSG devices. In this work, we exploited a washable CuS-enhanced light absorption PTM based on polydopamine-cotton fabric (PDA-CF), which is abbreviated as CuS-PDA-CF. On one hand, CuS-PDA-CF is washable and can be cleaned by hand or ultrasonic to remove the deposited salts and renew the photothermal performance. On the other hand, Due to the cooperative contribution of CuS and PDA, the light absorption capacity of CuS-PDA-CF is improved to 98.13%, acquiring a 1.50 kg m −2 h −1 water evaporation rate with a 94.49% photothermal efficiency at 1-solar (1 kW m −2 ) illumination. Outdoor experiments demonstrate that the solar vapor generator based on CuS-PDA-CF can extract freshwater from seawater and industrial wastewater. The cations elimination rate in seawater and industrial wastewater is higher than 99.9%. This work provides an achievable method to fabricate efficiency-enhanced and washable CF-based solar evaporators to relieve freshwater scarcity.
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
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 12
·17015-17028
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IF 4.672
Xueliang Sun,Qilong Wang,Yuyu Liu,Jin Yi,Jiujun Zhang
Summary CO 2 reduction to produce value-added chemicals/fuels is generally considered as an effective way to solve the energy crisis and global warming. However, the greatest challenge to the technology is the lack of high-performance catalysts as this process is quite sluggish under mild conditions. Herein, we have carefully prepared a series of bimetallic Pb x Cd y nanoparticles (NPs) as well as their monometallic counterparts via a facile chemical reduction. Electrocatalytic performances of obtained catalysts were evaluated with respect to chemical composition, electrolytic potential, and so on. All of them exhibit high performance and achieve high faradaic efficiency for HCOOH production (FE HCOOH ) over a voltage window of −1.16 to −1.26 V vs the reversible hydrogen electrode (V RHE ). Among them, Pb 3 Cd 1 achieved a maximum FE HCOOH of 96% at −1.16 V RHE and a desirable stability over 12 hours of continuous electrolysis. The excellent performance of Pb 3 Cd 1 can be attributed to the huge specific area of NPs and the synergistic effect of the components. This study shows that efficient bimetallic Pb x Cd y electrocatalysts have a large application potential for highly selective HCOOH production from CO 2 . Highlights Bimetallic PbCd nanoparticles were synthesized by facile chemical reduction for electrocatalytic CO 2 reduction. PbCd nanocatalysts performed well in highly active, selective, and stable HCOOH electrosynthesis from aqueous CO 2 . Pb 3 Cd 1 achieved maximum HCOOH faradaic efficiency of 96% at −1.16 V RHE , a record as far as we know. A stable current density (>7 mA cm −2 ) can be kept after a 12-hours continuous electrolysis.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 13
·18100-18108
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IF 4.672
Yuanyuan Feng,Yubo Yang,Chengfei Yang,Huimin Sun,Xiaowei Miao,Hongmei Ji,Gang Yang
Summary Although the high-capacity Si/graphite anode serves to advance the energy density of lithium-ion batteries, the volume change remains the main disfigurement of Si/graphite anode. Many studies show that crosslinked structure binders tend to play a good inhibitory effect on volume expansion. In this work, a three-dimensionally covalently cross-linked and flexible polyimides (C–PI–OH) is successfully synthesized and applied as silicon/graphite anode, which is composed through a tri-monomer co-polycondensation and crosslinking process. The as-formed free carboxylic acid groups and amide groups in C–PI–OH are efficient in structural stability, so the electrode bound by C–PI–OH exhibits the highest peeling strength than C–PI and polyvinylidene fluoride. The flexible network of the C–PI–OH binder is competent for accommodating the volume expansion and contraction of silicon particles during the deintercalation of lithium ion, which helps in the wholeness of solid electrolyte interface film and electrodes, and effectively boosting the cycle stability of the Si/graphite anode.
研究领域:
材料科学
·
电化学
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电池技术
✓ 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）