International Journal of Electrochemical Science
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2023
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IF 1.5
Wenliang Sun,Rusi Hao
Herein, porous activated carbon was synthesized from highland barley straw by phosphoric acid activation and used as a conductive agent for LiFePO 4 cathodes. The morphology and microstructure are characterized by scanning electron microscopy and nitrogen adsorption and desorption. The results show that the porous activated carbon convenient three-dimensional porous microstructure. Compared with the conventional conductive agent carbon black Super P, the obtained porous activated carbon presents a high capacity of 153.63 mA h g -1 at 0.1 C, as well as an excellent rate performance and cycling stability. The simple method for the preparation of porous activated carbon as a conductive agent with an excellent electrochemical performance opens up a new opportunity of LiFePO4 cathodes for widespread applications in lithium-ion 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
IONICS
·
2024
·
IF 2.4
Liang Qiuqun,Lan Xiaoqi,Liu Zheng,Ma Junjie,Han Guo-Cheng,Wang Hao
Sweet sorghum stalks can be utilized for the preparation of carbon materials, which can then be applied as negative electrode materials in lead–carbon batteries. In this study, sweet sorghum stalks were pretreated with 5 wt.% H 3 PO 4 and subsequently carbonized at 550 °C for 105 min. Subsequently, the electrochemical properties of lead-coated sorghum stalk–based carbon materials, prepared under varying reduction durations, were investigated through EIS and CV tests. On this basis, the negative electrode materials, which consisted of the lead-coated sorghum stalk–based carbon material (under the reduction time of 45 min) and physically ground comparison materials, were assembled into simulated lead–carbon batteries. The charge–discharge performance of these batteries was evaluated using a charge–discharge tester. The initial discharge capacities of the two materials were 73.0 mAh/g and 57.24 mAh/g, respectively. After 150 cycles, the capacity retention ratios were 71.8% and 57.5%, respectively. These results indicate that the simulated lead–carbon battery with the newly prepared carbon material exhibits superior electrochemical performance.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
高影响因子
Advanced Sustainable Systems
·
2022
·Vol. 6
·期 3
·2100342
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IF 6.737
Yongchao Li,Linqiong Xu,Jiayuan Cai,Jinhua Liu,Bizhi Lv,Jiabao Chao,Qiaohong Zhang,Yongqing Zhao
Solar desalination is one of the most promising technologies for alleviating the shortage of fresh water. In recent years, interfacial solar evaporators have attracted much attention due to their higher energy efficiency compared to traditional technologies that directly heat bulk water. However, its development has been hampered by the complex preparation process, high costs, and low evaporation performance. Here, a bilayer biomass solar interfacial evaporator—polypyrrole-sorghum straw (PPy-SS) evaporator—by coating PPy on the cross section of natural SS is developed via a facile in situ polymerization method at room temperature. The upper PPy layer can achieve a light absorption of about 96% in the range of 200–2500 nm and convert light energy into heat to evaporate water; the lower SS layer can provide continuous water supply to the PPy layer and localize the heat onto the PPy layer. The PPy-SS evaporator achieves an evaporation rate of 1.385 kg m −2 h −1 and a high evaporation efficiency of 81.9% under 1 Sun illumination. Furthermore, PPy-SS evaporator displays excellent performance in desalination of seawater. Therefore, such PPy-SS solar evaporator has great potential for application in solar desalination to alleviate the shortage of freshwater resources.
研究领域:
材料科学
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环境科学
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能源技术
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 105
·103508-103516
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IF 3.289
Guofu Ma,Fengting Hua,Kanjun Sun,Zhiguo Zhang,Enke Feng,Hui Peng,Ziqiang Lei
Sorghum stalk based porous carbons (SSCs) have been synthesized through a simple carbonization method at 800 °C used sorghum stalk as carbon precursor and ZnCl2 as activating agent. The morphology and structure of the SSCs are investigated by scanning electron microscopy, transmission electron microscopy, nitrogen adsorption–desorption, Raman spectra and X-ray diffraction. Undergoes activation at optimal amount of zinc chloride (sorghum stalks to ZnCl2 is 1 : 1), the resulting samples, labeled as SSC1.0 has a porous texture with high specific surface area and efficient ion diffusion channels (1354.7 m2 g−1 specific surface areas and 0.765 cm3 g−1 pore volumes), and the sample also has superhydrophilicity characterized by water contact angles. As supercapacitor electrode, it can deliver 216.5 F g−1 specific capacitance at 0.5 A g−1, 75% capacitance retention even at 8 A g−1 in 2 mol L−1 KOH aqueous electrolyte and excellent cyclic stability with 92% capacitance retention after 5000 cycles at 5 A g−1. Moreover, the assembled SSC1.0//SSC1.0 symmetric cell has wide voltage range of 1.8 V, and high energy density in 0.5 mol L−1 Na2SO4 aqueous electrolyte.
研究领域:
材料科学
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电化学
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能源存储
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纳米材料
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环境功能材料
✓ 已验证
DOI
高影响因子
Materials Today Chemistry
·
2025
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IF 6.7
Fuqiang Zhang,Zhiqiang Qi,Xiaoxue Wu,Keyan Yang,Hongzhen Cai,Waqar Iqbal,Jibing Zhang
Solar interfacial evaporation is a green, environmental-friendly, energy-saving technology for clean water production. Designing a solar evaporator with a special structure is a feasible way to enhance the effect of light and heat. However, low efficiency, high cost and complicated manufacturing of solar evaporator are still its key problems. Biomass-based materials, with their unique natural structure, good environmental friendliness and low cost, have attracted extensive research interest as solar energy absorbing materials. In this paper, the cheap biomass sorghum straw (SS) is used as the material, and the dehydrated carbonation property of sulfuric acid is used to make the top of sorghum straw form a carbonation layer, and this carbonation layer forms a special –bowl-like structure, which increases the reflection of the incident light and the capture of the light, so that the sorghum straw solar energy evaporator's light absorption rate is more than 90 %, the evaporation rate is as high as 1.96 kg m −2 h −1 under one solar radiation, and the evaporation efficiency is 81.8 %. Notably, CSS demonstrated remarkable cyclic stability, along with excellent desalination and purification performances. This research offers a practical approach for the efficient utilization of sorghum straw, thereby holding substantial research significance and practical application potential.
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
Coatings
·
2022
·Vol. 12
·期 8
·1226
·
IF 3.236
Juan Li,Guantao Zhang,Dongjie Zhang
This study sought to improve the utilization of sorghum straw resources and promote the industrial production of new biomass materials. Herein, we fabricated SSP/ZnO/PVA nanocomposite films from sorghum straw powder (SSP), corn starch, polyvinyl alcohol (PVA), and nanostructured ZnO via the casting method. Then, we used response surface methodology to examine the effects of the mass concentrations of SSP, glycerol (Gly), and nanostructured ZnO, as well as the starch–PVA mass ratio on the tensile strength (TS) and water vapor permeability (WVP) of the SSP/ZnO/PVA nanocomposite films. The optimum preparation conditions were as follows: SSP mass concentration of 2.0 g/150 mL, Gly mass concentration of 2.5 g/150 mL, starch–PVA mass ratio of 6:4.5, and nanostructured ZnO mass concentration of 0.7 g/150 mL. The TS and WVP of the prepared films were 47.57% higher and 27.07% lower, respectively, than those of ZnO/PVA composite films without SSP. Scanning electron microscopy and atomic force microscopy showed that the SSP/ZnO/PVA nanocomposite films had smooth surfaces and dense cross-sections, without obvious delamination or phase separation. Fourier transform infrared spectroscopy, X-ray diffraction, and thermogravimetric analyses revealed that SSP was highly compatible with the ZnO/PVA matrix. Thus, SSP addition could improve the crystallinity, thermal stability, and matrix interactions of SSP/ZnO/PVA nanocomposite films.Keywords:sorghum straw powder;nanostructured ZnO;polyvinyl alcohol;nanocomposite film;physical properties;structural characterization
研究领域:
材料科学
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环境科学
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生物质资源利用
✓ 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）