INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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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
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2018
·Vol. 42
·期 11
·3496-3505
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IF 3.009
Lei Wang,Luting Yan,Xiuyuan Gao
Summary Polydopamine (PDA) films were irradiated by an electron beam linear accelerator at different irradiation doses ranging from 10 to 150 kGy. The irradiated samples were characterized by Fourier transform infrared spectrometry, UV-Vis, scanning electron microscopy, atomic force microscope, X-ray diffraction, cyclic voltammetry, electrochemical impedance spectroscopy, and thermogravimetric analysis. Changes in surface morphology, chemical structure, contact angle, frontier orbitals, and bandgap were analyzed. PDA films modified by electron beam irradiation were used in the interface design and control of polymer solar cells. Devices with the structures of ITO/ZnO/PTB7:PC 71 BM/MoO 3 /Al and ITO/PDA-ZnO/PTB7:PC 71 BM/MoO 3 /Al were fabricated. The solar cells with a 100-kGy electron beam-irradiated PDA film-modified ZnO electron transport layer had a significantly improved short circuit current density, and its efficiency reached a maximum value. The short circuit current density and power conversion efficiency reached 13.70 mA/cm 2 and 3.82%, respectively. Electron beam irradiation is an effective method to modify PDA, which can be used as an interface modifier in polymer solar cells.
研究领域:
材料科学
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能源科学
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界面工程
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DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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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
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DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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2021
·Vol. 46
·期 2
·1813-1825
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IF 5.164
Zhong Dai,Peng-Gang Ren,Zhengzheng Guo,Xin Hou,Wenwei He,Fang Ren,Yanling Jin
Summary With the rapid development of portable electronic devices, it is strongly urgent to explore the flexible and sustainable supercapacitor with lightweight, large power/energy density, good cycle stability, outstanding coulombic efficiency, and excellent operational safety. Herein, a novel and flexible all-solid-state asymmetric supercapacitor is assembled from silver (Ag) or/and cobalt acid nickel (NiCo 2 O 4 ) nanoparticles coated with hollow carbon micro-skeleton (HCMS-Ag and HCMS@NiCo 2 O 4 -Ag). The HCMS@NiCo 2 O 4 -Ag electrode is subsequently prepared by a facile hard template combined with hydrothermal method. The morphology analysis shows that plenty of NiCo 2 O 4 nanoflowers composed of a tremendous number of nanoneedles are uniformly grown on the three-dimensional hollow carbon micro-skeleton. This unique and novel structure endows the prepared electrode with a high specific capacitance of 527.4 F g −1 at a current density of 0.5 A g −1 and outstanding rate capability of 75%. The assembled pliable asymmetric supercapacitor possesses a maximum energy density of 42.67 Wh kg −1 , long cycle life (97.4% capacitance retention), and excellent flexibility. Therefore, this work opens new horizon to develop the next-generation carbon composites for flexible all-solid-state asymmetric supercapacitor with high levels of electrochemical properties.
研究领域:
材料科学
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能源存储
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纳米技术
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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2021
·Vol. 46
·期 3
·2373-2384
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IF 5.164
Lanlan Mo,Shuai Jia,Shiying Lin,Ziqiang Shao,Feijun Wang
Summary A facile method for synthesis of biomass-derived porous carbon from bio-wastes sodium lignosulfonate is proposed. Using neutral reagent KNO 3 as activator and nitrogen source, the porous carbon materials with three-dimensional hierarchical porous structure interconnected oxygen, nitrogen and sulphur co-doped are prepared via simple and efficient lyophilisation and a one-step carbonization. The porous carbon carbonized at 800°C possesses high specific surface area (2400 m 2 g −1 ) and moderate oxygen (9.15 at%), nitrogen (2.35 at%) and sulphur (0.37 at%) contents. As a result, the GSLS-800 achieves an ultrahigh specific capacitance of 389.7 F g −1 with 1 A g −1 as well as 92.3% capacitance retention with 10 000 cycles at 10 A g −1 under 3 M KOH three-electrode system. Furthermore, the solid-symmetric supercapacitor aggregated by GSLS-800 delivers a high energy density of 27.26 W h kg −1 under a power density of 487.75 W kg −1 and presents a favourable retention capacity of 89.6% at 10 A g −1 after 10 000 cycles. This work extends high value-added utilization of biomass derivatives in energy storage applications.
研究领域:
材料科学
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能源存储
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环境科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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2020
·Vol. 44
·期 6
·4933-4943
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IF 3.741
Songwei Li,Shengli Pang,Xiao Wu,Xinye Qian,Shanshan Yao,Maoxiang Jing,Tianbao Li,Chonglin Chen,Xiangqian Shen
Summary The electronic nonconductivity of S and shuttle effect of soluble polysulfides are two fundamental issues that limit the application of lithium-sulfur (Li-S) batteries. Regarding these issues, herein, a sponge-like Ketjen black (KB)-triphenylphosphine sulfide (TPS) multifunctional modification layer was proposed to coat the separator of the advanced Li-S batteries. The layer was formed by an in situ spontaneous reaction between triphenylphosphine (TPP) of the conventional KB-TPP layer and Li 2 S 6 solution. This functional layer can ensure a high e − and Li + conductivity while inhibiting the diffusion of soluble polysulfides. As a result, the redox activity, rate capability, and cycling stability of the batteries are significantly enhanced. Comparing with the discharge capacities at 2C for the PE separator, introducing the KB-TPS functional layer was beneficial for the capacity retentions of the cells, since the capacity increased from 16.1% to 66.6% at the same C-rate. A capacity degeneration rate of 0.045% per cycle was obtained for the cell with an S area density of 3.6 mg cm −2 . This work is a step forward in the exploration of advanced Li-S batteries, being a valuable reference for the study of related systems.
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
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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2020
·Vol. 44
·期 6
·4556-4567
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IF 3.741
Xiaoqi Tan,Shuxia Liu,Qingping Guo,Jie Zhang,Shujun Liang,Maoyong He,Jujie Luo
Summary Amorphous MnO 2 was attached to carbon nanotubes (CNTs) in 60 seconds by solid-state microwave method. As electrodes in supercapacitors, the coactions of the MnO 2 and CNT augmented the actual value of capacitance to 1250 F g −1 , and cycle steadiness held 80% of the starting value after 7000 cycles. The equipped MnO 2 /CNT//AC asymmetric supercapacitor (ASC) manifested preferable energy density with 33.5 Wh kg −1 (at 400 W kg −1 ). Its glorious electrochemical properties of MnO 2 /CNT demonstrated that the microwave method has great potency to realise the composite of electrode materials.
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
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2020
·Vol. 44
·期 6
·4260-4268
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IF 3.741
Jin-Feng Chen,Xiao-Dong He,De-Jun Li,Jian-Min Feng
Summary In the context of large scale and low-cost energy storage, the emerging potassium-ion batteries (PIBs) are one potential energy storage system. Graphite, a commercial anode material widely used in lithium-ion batteries (LIBs), can be directly applied to PIBs through forming the stage I graphite intercalation compound (KC 8 ). However, the dramatic volume expansion during the formation of KC 8 can result in poor cycling performance. In this work, one Al 2 O 3 atomic layer coated on the surface of graphite via atomic layer deposition (ALD) process, aiming to construct a stable solid electrode interface and enhance the performance of graphite anode in PIBs. The electrochemical performance analysis shows that the 20 cycles Al 2 O 3 deposited graphite have improved cycle stability of 223 mAh g −1 at 50 mA g −1 after 50 cycles compared with the raw graphite anode of 92 mAh g −1 .
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
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2020
·Vol. 44
·期 6
·4426-4437
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IF 3.741
Fangyan Cui,Wenyi Wang,Caini Liu,Xingyu Chen,Ning Li
Summary One-dimensional (1D) sodium ligninsulfonate functionalized carbon nanotubes (SCNT), two-dimensional (2D) graphene oxide (GO), and three-dimensional (3D) zirconium-based metal-organic frameworks (UiO-66) are self-assembled as filler materials for proton-exchange membranes (PEMs) because of their potential for extending proton transport pathways. Herein, UiO-66-SCNT and UiO-66-SCNT@GO were prepared by a facile solvothermal synthesis and then the nanohybrid chitosan (CS) PEMs were fabricated via solution casting. The hybrid PEMs with higher ion exchange capacity than the pure CS membrane displayed higher proton conductivity and selectivity. The proton conductivity of nanohybrid membrane doped with 7 wt% UiO-66-SCNT@GO (CS/U-S@GO-7) was enhanced to 64 mS cm −1 at 70°C. Simultaneously, the selectivity was reached 19.4 × 10 4 S s cm −3 and was much higher than the pristine CS membrane (0.13 × 10 3 S s cm −3 ). Moreover, the mechanical properties of all composite membranes were significantly enhanced compared with that of the pure CS membrane. The results showed that our research provided a valuable strategy for designing high-performance CS-based PEMs in direct methanol fuel cell (DMFC). Highlights A simple and facile solvothermal synthesis was used to prepare UiO-66-SCNT@GO. UiO-66-SCNT@GO was introduced into chitosan (CS) matrix to optimize proton transport channels. CS-based hybrid membranes exhibit high proton conductivity and selectivity. CS-based hybrid membranes show low methanol permeability.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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2020
·Vol. 44
·期 6
·4616-4628
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IF 3.741
Yunlong Zhou,Xiaoyuan Ye,Dongyao Lin
Summary In this study, alkali pretreated corn stover was added as a sacrificial agent to the suspension of Pt/TiO 2 to significantly enhanced photocatalytic hydrogen evolution. The changes in structural characteristics of corn stover before and after alkali treatment and photocatalytic reactions were studied. According to the results, the removal of lignin and hemicellulose, as well as the changes in surface morphology, structural components, and functional groups of alkali pretreated corn stover may affect the photocatalytic hydrogen production process. Next, the effects of NaOH concentration, pretreatment time and temperature on hydrogen production were also investigated. Among them, within the scope of the experimental conditions, the optimal hydrogen production is 25.84 μmol h −1 . Moreover, the enhancement of photocatalytic hydrogen production is also achieved by using the waste liquid of alkali pretreated. The output of this study may provide a reference for the reuse of alkali-treated biomass residues and waste liquor in some industries, and make more comprehensive, efficient and green use of native lignocellulosic biomass.
研究领域:
环境科学
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能源科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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2020
·Vol. 44
·期 6
·4677-4686
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IF 3.741
Chunmei Gao,Meishao Hu,Mingliang Fang,Jiale Chen,Lei Wang
Summary Development of anion exchange membranes (AEMs) with good performance, such as high conductivity, good alkaline stability and mechanical strength, has been a hot topic for the fuel cell application. Here, a novel kind of hyperbranched cross-linker decorated with quaternary ammonium groups was introduced to polybenzimidazole (PBI) membranes and QOPBI-x membranes (where x is the weight ratio of the hyperbranched cross-linker). Compared with the linear OPBI membrane (0.091 S cm −1 ), QOPBI-x membranes displayed an improved ionic conductivity (up to 0.122 S cm −1 ) at 60°C after they were doped in 6 M KOH for 7 days. The KOH-doped QOPBI-x membranes also exhibited a high tensile strength (54.5-61.7 MPa) and superior alkaline stability. There is almost no decline in the ionic conductivity after being immersed in a 6 M KOH solution for 30 days. In addition, the alkaline direct methanol fuel cell (ADMFC) performance based on the KOH-doped OPBI and QOPBI-x membranes is described. The QOPBI-15 membrane displayed good performance (75.6 mW cm −2 ), which is 33.3% higher than the OPBI membrane (56.7 mW cm −2 ).
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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2020
·Vol. 44
·期 6
·4827-4836
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IF 3.741
Mojie Sun,Zhao Wang,Bixue Gao,Shijie Wang,Chi Wang,Xiaochen Song,Dongyao Lin
Summary To circumvent the expensive cost of precious metal electrocatalysts, a hydrothermal method and a plasma-enhanced chemical vapor deposition (PECVD) method have been used to prepareNiS 2 -Ni(OH) 2 /NF-PECVD (N-PECVD) with excellent properties. After XRD, SEM, XPS, and other characterization methods, it can be seen that after the hydrothermal reaction of Ni foam (NF), 50-60 nm Ni(OH) 2 nanosheets have grown on the NF frame. The subsequent PECVD reaction produces 90 nm NiS 2 -Ni(OH) 2 nanosheets on the NF frame. The hydrogen release overpotentials in the acidic solution and alkaline solution are 90 and 95 mV ( j = 10 mA/cm 2 ), respectively. And the Tafel slopes reach 80 and 83.6 mV/dec, respectively. The chronopotential (CP) test shows that the material has good HER stability over 12 h. The results from the subsequent electric double layer capacitance and alternating current impedance (EIS) tests show that N-PECVD synthesized by PECVD has a relatively large active electrochemical surface area (ECSA) and a low electrochemical impedance. This study not only finds good inspiration for the synthesis of cheap HER catalysts but also provides a valuable reference for the synthesis of materials in other fields.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）