Carbon Letters最新文献

{"title":"Comparative study of the carbon structure of chars formed from coal with plastic waste and coal tar pitch additives","authors":"Joseph Appiah,&nbsp;Lu Tian,&nbsp;Xiuli Xu,&nbsp;Jinxiao Dou,&nbsp;Jiawei Wang,&nbsp;Xingxing Chen,&nbsp;Jianglong Yu","doi":"10.1007/s42823-024-00823-0","DOIUrl":"10.1007/s42823-024-00823-0","url":null,"abstract":"<div><p>Plastic wastes such as polyethylene terephthalate have recently been incorporated into coal as additives in coke manufacturing. Plastic waste results in the reduction of high-quality coal usage while protecting the environment. Using coal tar pitch as an additive in the coal blend causes an increase in fluidity during carbonization. The volatile matter released during carbonisation affects coal thermoplasticity, hence the carbon structural parameters. This paper investigates the role of polyethylene terephthalate and the mixture of polyethylene terephthalate and coal tar pitch on carbon structure formation during coal to coke transformation. The additives were blended with coking coal in 2, 3, 4, 5, and 10% wt. The results imply that incorporating coal tar pitch into the coal/ polyethylene terephthalate mixture improves the crystallite height of the resulting semi-coke. The addition of coal tar pitch and polyethylene teraphthalate blend to coking coal at a percentage below 5%wt. leads a positive impact on the crystallite height of the resulting coal char. The incorporation of coal tar pitch into the blend decreased the average interlayer spacing. At elevated temperatures, the polyethylene terephthalate in the blend causes an increase in the mean tortuosity. However, incorporating coal tar pitch into the blend led to about 3.3% decrease in mean tortuosity.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 2","pages":"749 - 765"},"PeriodicalIF":5.5,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigating structural disparities in carbon nanoribbons and nanobelts through spectroscopies","authors":"Jungpil Kim","doi":"10.1007/s42823-024-00825-y","DOIUrl":"10.1007/s42823-024-00825-y","url":null,"abstract":"<div><p>In this study, simulated X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy were utilized to differentiate the carbon nanoribbons (CNRs) and carbon nanobelts (CNBs) with different edges. CNRs, characterized by linear, extended π-conjugated systems, and CNBs, featuring closed-loop, cyclic structures, exhibit distinct bandgaps influenced by edge configuration and molecular structure. CNBs generally possess smaller bandgaps than GNRs due to enhanced π-conjugation and electron delocalization in their curved structures. Specifically, the bandgaps of zigzag-edged GNRs and CNBs are smaller than those of their armchair-edged counterparts. These differences in electronic states cause shifts in the position of the C1s XPS peaks. ANR and ANB exhibit lower binding energies (BEs) compared to ZNR and ZNB. The peak position differences, which are 1.3 eV between ZNR and ANR and 0.5 eV between ZNB and ANB, highlight how edge configuration can differentiate structures within the same ribbon or belt type. While ZNR and ZNB have nearly identical peak positions, rendering them hard to distinguish, the 0.9 eV difference between ANR and ANB allows for clear differentiation. In ZNR and ZNB, strong bands from C–H bending and C–C stretching were observed, with slight differences in band positions allowing for structural differentiation. In ANR and ANB, the Kekulé vibration band was most intense, appearing at lower wavenumbers in ANB. Additionally, ANB showed unique C–C stretching bands at 1483 and 1581 cm⁻¹, which were barely observed in ANR. This study lays the groundwork for future spectroscopic analysis of GNRs and CNBs.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"34 9","pages":"2447 - 2453"},"PeriodicalIF":5.5,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ZnPb/C composites coating layer on stainless steel for bipolar plate of unitized regenerative fuel cells","authors":"Joon Young Kim,&nbsp;Chanmin Jo,&nbsp;Dae Jun Moon,&nbsp;Gyoung Hwa Jeong,&nbsp;Gnanaprakasam Janani,&nbsp;Seungryul Yoo,&nbsp;Dong Chan Seok,&nbsp;Seon Yeop Jung,&nbsp;Tae-Hoon Kim,&nbsp;Ho-Young Jung,&nbsp;Uk Sim","doi":"10.1007/s42823-024-00817-y","DOIUrl":"10.1007/s42823-024-00817-y","url":null,"abstract":"<div><p>For the commercialization of bipolar plates, several properties must be considered together. Electrical conductivity, corrosion resistance, contact resistance, mechanical strength, and light weight are essential evaluation factors, with corrosion resistance and durability being significant for unitized regenerative fuel cells (URFCs), which must operate in electrolysis and fuel cell mode. However, improving both properties is challenging, since corrosion resistance is largely inversely proportional to conductivity. In this study, to improve both properties together, composites composed of Pb and Zn with excellent conductivity and corrosion resistance were prepared with graphite powder and formed as a coating layer on the surface of 304 stainless steel (SS304) and evaluated for electrical conductivity and corrosion resistance. Among the ZnPb/C composites prepared at various ratios, Zn8Pb2/C exhibited the lowest transmittance resistance of 1.566 Ω, and improved electrical conductivity and durability compared to bare SS304.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 1","pages":"365 - 371"},"PeriodicalIF":5.5,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation and thermal conductivity properties of CF/SR composites with high orientation and low interfacial thermal resistance based on the synergistic effect of magnetic field, torsional vibration and Diels-Alder reaction","authors":"Chenhui Liu,&nbsp;Xiaoqing Yin,&nbsp;Zhi Liu,&nbsp;Jianfeng Wang,&nbsp;Yu Wang,&nbsp;Meiping Song,&nbsp;Jiancheng Guo,&nbsp;Xueping Gao,&nbsp;Bo Zhu,&nbsp;Xiaomin Yuan","doi":"10.1007/s42823-024-00814-1","DOIUrl":"10.1007/s42823-024-00814-1","url":null,"abstract":"<div><p>As the integration of devices in electronics manufacturing increases, there is a growing demand for thermal interface materials (TIMs) with high through-plane thermal conductivity. Vertically aligned carbon fiber (CF) thermally conductive composites have received considerable attention from researchers. However, the presence of significant interfacial thermal resistance at the interface between CFs and polymer presented a significant challenge to achieving the desired thermal conductivity, even in highly vertically aligned structures. Here, in addition to developing a polymer-based thermally conductive composite based on highly oriented CFs, we employed the Diels–Alder reaction to enhance the interfacial bonding between the CFs and the polymer matrix. Notably, we proposed the thermal conductivity enhancing mechanism of the highly oriented CFs filled silicone rubber (SR) composite originated from the strengthened interfacial bonding. The results indicated that the Diels–Alder reaction facilitated an increase in the thermal conductivity of the composite from 17.69 Wm⁻¹ K⁻¹ to 21.50 Wm⁻¹ K⁻¹ with a CF loading of 71.4 wt%. Additionally, a novel nano-indentation test was employed to analyse the interfacial strengthening of composites. Our research have significant implications for the advancement of thermal management in the field of electronics and energy, particularly with regard to the development of high-performance thermally conductive composites.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 2","pages":"687 - 698"},"PeriodicalIF":5.5,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fluorinated reed-carbon with three-dimensional porous channels to boost high-rate performance of lithium/fluorinated carbon battery","authors":"Boliang Wang,&nbsp;Baosheng Bai,&nbsp;Gaobang Chen,&nbsp;Qihui Sun,&nbsp;Guanjun Zhang,&nbsp;Xiwen Wang,&nbsp;Xian Jian","doi":"10.1007/s42823-024-00820-3","DOIUrl":"10.1007/s42823-024-00820-3","url":null,"abstract":"<div><p>The high-rate performance of lithium/fluorinated carbon (Li/CF_x) battery remains a challenge due to poor discharge dynamics behavior accompanied by the overheating issue. We developed a novel fluorinated reed-carbon with three-dimensional (3D) porous channels to favor discharge dynamics behavior achieving excellent discharge performance as high as 5 C. Typically, the preparation of fluorinated reed-carbon mainly involves three steps, namely, crushing into powders, pre-carbonization of reed and precise fluorination. During the fluorination process, we precisely controlled the fluorination temperature in range of 330–370 °C and gas ratio (F₂ of ~ 15 vol%) to optimize the fluorine carbon ratio. This kind of CF_x possesses the novel structure at the scale of micron level ranging from 0.5 to 3 μm, which favors the electrolyte and charge transport through the channels smoothly. This 3D porous structure increases the specific surface area of the CF_x material, providing more chemical reaction sites to enhance discharge dynamics behavior and effectively hinder the volume expansion of batteries, which is conductive to improve the high-rate performance of Li/CF_x battery. This low-cost and facile approach opens up a novel pathway to design carbon materials and CF_x for Li/CF_x battery.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 2","pages":"729 - 736"},"PeriodicalIF":5.5,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural modulation of graphene–polyimide interfaces below pyrolysis temperature under electrothermal treatment","authors":"Jianshu Yu,&nbsp;Hui Ding,&nbsp;Bin Chen,&nbsp;Xuejiao Sun,&nbsp;Ying Zhang,&nbsp;Zhongfu Zhou","doi":"10.1007/s42823-024-00810-5","DOIUrl":"10.1007/s42823-024-00810-5","url":null,"abstract":"<div><p>In the area of carbon-based thin films, graphene/polyimide conductive films display remarkable heat resistance and mechanical properties, making them a valuable resource for utilisation in a multitude of manufacturing and living contexts. Nevertheless, modulating the interfacial structure between graphene and polyimide represents a significant challenge in the pursuit of enhancing the conductivity of the composite films, due to the elevated initial temperature of polyimide pyrolysis (exceeding 600 °C). To develop it, this study found that polyimide could undergo chemical bond breaking and atomic rearrangement at around 500 °C, when subjected to an applied electric field in graphene/polyimide films. A series of characterisations showed that the graphene/polyimide film formed a new interfacial structure under electrothermal treatment, which enhanced the electron transport capacity and increased its conductivity from about 1497.01 s m⁻¹ to about 2688.17 s m⁻¹, with an increase of about 79.57%. This study would provide the possibility of modulating the structure of polyimide below the pyrolysis temperature, as well as a feasible idea for transferring the properties of graphene into the polyimide matrix.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 2","pages":"659 - 674"},"PeriodicalIF":5.5,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of nanotechnology in cementitious materials for enhanced concrete construction through carbon incorporation","authors":"Lingli Wang,&nbsp;Wen Xu,&nbsp;Ibrahim Albaijan,&nbsp;Hamad Almujibah,&nbsp;Riadh Marzouki,&nbsp;Sana Toghroli","doi":"10.1007/s42823-024-00792-4","DOIUrl":"10.1007/s42823-024-00792-4","url":null,"abstract":"<div><p>Enhanced concrete construction through carbon incorporation in nanotechnology-enabled cementitious materials can be achieved using biochar. Biochar is a carbon additive, improving concrete’s mechanical strength and durability while reducing porosity and enhancing sustainability. The objective is to leverage the unique properties of biochar, derived from carbon nanotechnology, to improve mechanical strength durability, and reduce porosity in concrete. By integrating biochar, this research aims to develop a more resilient and environmentally friendly construction material, addressing performance and sustainability challenges in modern concrete construction. However, a significant research gap exists in understanding biochar's long-term effects and optimal concentrations in cementitious matrices. This study seeks to fill this gap by systematically investigating the performance enhancements and material properties imparted by biochar in various concrete formulations. The study demonstrated that incorporating carbon-rich biochar into concrete significantly enhances its structural performance and sustainability. The life-cycle assessment (LCA) of biochar-incorporated concrete reveals significant environmental benefits, highlighting its potential for sustainable construction practices. Integrating biochar into concrete enhances the material’s durability and longevity, reducing the need for frequent repairs and replacements, thus conserving resources. The use of biochar supports sustainable waste management by utilizing agricultural and forestry residues, thereby reducing waste and conserving natural resources. Nanotechnology in concrete, through the use of biochar, improves the material’s mechanical properties, creating a denser and more durable matrix that requires less maintenance. These findings underscore the dual benefits of enhancing concrete performance while promoting environmental sustainability, making biochar-incorporated concrete a promising solution for eco-friendly construction<b>.</b> Optimal biochar concentration at 7% by weight improved compressive strength by 20%, reduced freeze–thaw damage by 80%, and decreased chemical degradation by up to 85%. Additionally, biochar reduced concrete porosity and water absorption, creating a denser and more durable matrix. These results highlight the dual benefits of using biochar for carbon sequestration and improving concrete's mechanical properties, supporting its use in sustainable construction practices.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 2","pages":"539 - 552"},"PeriodicalIF":5.5,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effect of non-polar solvent on the structural properties and electrochemical performance of LiFePO4/C cathode materials synthesized by solid-state reaction","authors":"Trias Prima Satya,&nbsp;Abdulloh Rifai,&nbsp;Iman Santoso,&nbsp; Harsojo","doi":"10.1007/s42823-024-00821-2","DOIUrl":"10.1007/s42823-024-00821-2","url":null,"abstract":"<div><p>LiFePO₄/C has been successfully synthesized using surfactant-assisted solid-state reaction method to investigate the effects of non-polar solvents on structural properties and electrochemical performance. Petroleum jelly, oleic acid, and sucrose were used as non-polar solvents, surfactants and carbon sources. The ratio of petroleum jelly and oleic acid were 0.5:1 (LFP A), 1:1 (LFP B), and 2:1 (LFP C). The XRD, FE-SEM, and HR-TEM results show that adding petroleum jelly in LFP C enhances crystallinity and improves the morphology of nanoplates in LiFePO₄ material. The EDS and Raman Spectroscopy tests show that the higher addition of petroleum jelly increases carbon percentage and carbon layer defects. The highest Li-ion diffusion coefficient was calculated by LFP C of 4.21 <span>(times)</span> 10^–15 cm².s⁻¹. Furthermore, the highest discharge test results at 0.1 C of LFP A, LFP B, and LFP C were 125 mAh.g⁻¹, 103 mAh.g⁻¹, and 144 mAh.g⁻¹, respectively. However, C-rate performance shows that the specific capacity of LFP A, LFP B, and LFP C at 5 C were 74 mAh.g⁻¹, 35 mAh.g⁻¹, and 59 mAh.g⁻¹, respectively. The cyclability test results showed that LFP A capacity retention after testing for 100 cycles was better than LFP C, and the lowest stability was obtained by LFP B. The addition of petroleum jelly improved the performance of LiFePO₄/C but resulted in excess carbon in active material which decreased battery stability and specific capacity at high C-rate. Our results suggest that non-polar solvents can be added to LiFePO₄/C synthesis to improve electrochemical performance but less carbon chains must be chosen.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 2","pages":"737 - 747"},"PeriodicalIF":5.5,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Graphene oxide-enhanced multiscale modeling of PGDLLA/P(lLA-co-ɛ-CL)/PCL interfacial debonding: investigating rheological and mechanical properties, compatibility, and morphology","authors":"Ehsan Vafa,&nbsp;Mohammad Barghamadi,&nbsp;Somayeh Parham,&nbsp;Katayoon Rezaeeparto,&nbsp;Mohammad Bagher Zarei,&nbsp;Mohammad Javad Azizli,&nbsp;Mohammad Ali Amani,&nbsp;Hesam Kamyab,&nbsp;Shreeshivadasan Chelliapan","doi":"10.1007/s42823-024-00793-3","DOIUrl":"10.1007/s42823-024-00793-3","url":null,"abstract":"<div><p>In this paper, poly(glycolic acid–co-DL–lactic acid) (PGDLLA)/poly(ɛ-caprolactone) (PCL) incompatible nanocomposites were combined with multiscale modeling (MSM) in a ratio of 80/20. Since the behavior and mechanical properties of blends depend significantly on the interphase region, the compatibilizer poly(<i>l,l</i>-lactic acid<i>–co-ɛ-</i>caprolactone) (P(<i>l</i>LA<i>-co-ɛ-</i>CL)) was used to improve compatibility and graphene oxide (GO) was used to increase the interphase strength of PGDLLA matrix/PCL. This work was done by mixing solvent to achieve the optimum disperse of GO in the matrix. The investigation of interfacial phenomenon by the theoretical interfacial models is important. Under the assumption of constant modulus and elastic deformation in the zero interface region, the predictions in this region are more unreliable when the calculations of experimental mechanical properties are analyzed in detail. In this study, PGDLLA/P(lLA-co-ɛ-CL)/PCL compounds were compared with the MSM approach to predict the plastic deformation in the stress–strain behavior. In contrast to the hypothesis that a simple look at the interphase area in nanocomposites, a finite element code is proposed to evaluate the efficiency of the interphase area. Both experimental results and FEM analysis showed that Young’s modulus increases by incorporating GO into GO/PGDLLA/P(<i>l</i>LA-co-ɛ-CL)/PCL nanocomposites; the amount of increase for incorporating 1 phr GO is about 61%.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 2","pages":"553 - 573"},"PeriodicalIF":5.5,"publicationDate":"2024-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research progress of carbon nanotubes as anode materials for lithium-ion batteries: a mini review","authors":"Da Zhang,&nbsp;Tiejian Yuan,&nbsp;Haiqin Zhang,&nbsp;Song Shi,&nbsp;Xinyue Wang,&nbsp;Ruixin Ding,&nbsp;Yan He","doi":"10.1007/s42823-024-00816-z","DOIUrl":"10.1007/s42823-024-00816-z","url":null,"abstract":"<div><p>With the emergence of the new energy field, the demand for high-performance lithium-ion batteries (LIBs) and green energy storage devices is growing with each passing day. Carbon nanotubes (CNTs) exhibit tremendous potential in application due to superior electrical and mechanical properties, and the excellent lithium insertion properties make it possible to be LIBs anode materials. Based on the lithium insertion mechanism of CNTs, this paper systematically and categorically reviewed the design strategies of CNTs-based composites as LIBs anode materials, and summarized in detail the enhancement effect of CNTs fillers on various anode materials. More importantly, the superiorities and limitations of various anode materials for LIBs were evaluated. Finally, the research direction and current challenges of the industrial application of CNTs in LIBs were prospected.</p><h3>Graphical abstract:</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"34 8","pages":"2055 - 2079"},"PeriodicalIF":5.5,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142410090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}