Journal of Power Sources最新文献

{"title":"Multi-task neural network combined with adaptive dual Kalman filter for joint estimation of battery state-of-charge and state-of-health","authors":"Junting Bao ,&nbsp;Yuan Mao ,&nbsp;Weijie Zhang ,&nbsp;Zhiming Zhang ,&nbsp;Youbing Zhang","doi":"10.1016/j.jpowsour.2025.238036","DOIUrl":"10.1016/j.jpowsour.2025.238036","url":null,"abstract":"<div><div>Precise estimation of lithium-ion battery (LIB) state constitutes fundamental technology for battery management systems (BMSs), ensuring safe electric vehicles (EVs). To address accuracy limitations of traditional independent battery state estimation methods, this work proposes a joint state of charge (SOC) and state of health (SOH) estimation framework using dual-extended Kalman filter (DEKF) and multi-task neural networks. Firstly, the coyote optimization algorithm (COA) integrates with innovation matrix adaptive optimization for DEKF noise matrix, achieving high-precision joint parameter and SOC tracking on short-time scales. Secondly, image features are extracted from noise-reduced incremental capacity (IC) curves. Leveraging both time-series data and these image features on long-time scales, a Multi-task SOH Forecasting Neural Network (MTSOHFNN) is designed to enhance SOH prediction generalization capability. Finally, A novel mutual compensation mechanism implements SOC output identification results as SOH prediction inputs, while SOH capacity predictions dynamically update SOC estimation components. Validation using NASA battery aging dataset demonstrates SOC estimation MAE consistently below 3.5 %. For SOH estimation, the RMSE reaches as low as 0.33 % and remains below 0.653 % across all cycles, with all prediction accuracies significantly surpassing baseline methods.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"656 ","pages":"Article 238036"},"PeriodicalIF":7.9,"publicationDate":"2025-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144763926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrolyte effects and stability of Zn/Li dual-ion batteries with water-in-salt electrolytes","authors":"Taťána Supiňková ,&nbsp;Markéta Zukalová ,&nbsp;Nikolaos Kakavas ,&nbsp;Jiaqi Xu ,&nbsp;Wenzhe Niu ,&nbsp;Felix T. Eickemeyer ,&nbsp;Michael Graetzel ,&nbsp;Ladislav Kavan","doi":"10.1016/j.jpowsour.2025.237983","DOIUrl":"10.1016/j.jpowsour.2025.237983","url":null,"abstract":"<div><div>Aqueous zinc-ion batteries have emerged as promising candidates for safe and cost-effective energy storage, yet their performance remains constrained by electrode stability and electrolyte composition. In this study, we investigate the electrochemical behavior of various electrode materials utilizing water-in-salt dual-ion electrolytes. Our findings highlight the critical influence of substrate materials on electrochemical stability, with titanium exhibiting superior anodic stability compared to, e.g., aluminum. Furthermore, we demonstrate the feasibility of LiFePO₄ as a positive electrode, revealing a redox potential of 1.17 V vs. Zn²⁺/Zn in chloride-based electrolyte, which shifts positively with increasing lithium concentration. The observed potential variation with electrolyte composition underscores the need for optimized formulations to enhance the battery performance. Additionally, while LiMnPO₄ offers a higher theoretical voltage, its cycling stability remains limited, suggesting that material modifications are necessary. Finally, we highlight the overlooked impact of electrolyte impurities on battery performance, emphasizing the importance of high-purity electrolyte components. These insights contribute to the development of more stable and efficient Zn-ion batteries, paving the way for their practical deployment in energy storage applications.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"655 ","pages":"Article 237983"},"PeriodicalIF":7.9,"publicationDate":"2025-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144756723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tailored unsymmetrical squaraine dyes for high-efficiency DSSCs: Modulating aggregation and charge injection via alkyl chain engineering","authors":"J. Alkabli ,&nbsp;Yaaser Q. Almulaiky ,&nbsp;Khalid Althumayri ,&nbsp;Sultan A. Al-horaibi","doi":"10.1016/j.jpowsour.2025.238021","DOIUrl":"10.1016/j.jpowsour.2025.238021","url":null,"abstract":"<div><div>This study presents the design, synthesis, and characterization of a novel series of far-red-active unsymmetrical squaraine chromophores (USQI-1 to USQI-4) for dye-sensitized solar cells (DSSCs). Through strategic molecular engineering, these dyes incorporate sp³-hybridized carbon centers and nitrogen-alkyl functionalities, enabling enhanced light-harvesting capabilities across the visible-to-near-infrared spectrum. Comprehensive photophysical and electrochemical analyses, supported by density functional theory (DFT) calculations, reveal optimized HOMO-LUMO energy level alignments, facilitating efficient charge injection and dye regeneration. The USQI-4 dye, when co-adsorbed with chenodeoxycholic acid (CDCA), achieves a remarkable power conversion efficiency (<em>PCE</em>) of 7.1 %, with an open-circuit voltage (<em>V</em>_<em>oc</em>) of 0.74 V and a short-circuit current density (<em>J</em>_<em>sc</em>) of 13.12 mA/cm². The co-sensitization strategy effectively suppresses molecular aggregation, improving charge transport kinetics and minimizing recombination losses. This work establishes a robust framework for the rational design of high-performance, sustainable DSSCs sensitizers, advancing the development of scalable photovoltaic technologies.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"656 ","pages":"Article 238021"},"PeriodicalIF":7.9,"publicationDate":"2025-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144757815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Micromechanical effects of primary particle structure on rate performance and fracture in polycrystalline LiNixCoyMn1-x-yO2","authors":"Hairui Huang ,&nbsp;Shaohai Dong ,&nbsp;Tao Zhang ,&nbsp;Zhan-Sheng Guo","doi":"10.1016/j.jpowsour.2025.238002","DOIUrl":"10.1016/j.jpowsour.2025.238002","url":null,"abstract":"<div><div>Polycrystalline LiNi_xCo_yMn_1-x-yO₂ (PC-NCM) particles are widely utilized as cathode materials in lithium-ion batteries due to their high operating voltage and energy density. However, intergranular fractures that occur during charging significantly hinder their performance. This study innovatively integrates chemomechanical damage modeling with anisotropic particles generated via the Voronoi method to analyze the electrochemical performance and crack evolution in PC-NCM materials. By incorporating cohesive zone model elements between primary particles, intergranular cracks are simulated and their morphology, density and crack distribution are thoroughly investigated under various microstructures (primary particle size and crystal orientation) and C-rates. The electrochemical performance of PC-NCM particles is evaluated based on voltage and state of charge (SOC). Our findings reveal that smaller primary particle sizes lead to higher SOC and lower crack density, while variations in grain orientation influence crack morphology and particle SOC. Increasing the C-rate reduces SOC but mitigates particle cracking. This research enhances the understanding of fracture mechanisms in PC-NCM particles and provides valuable insights for optimizing their design in LIBs.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"656 ","pages":"Article 238002"},"PeriodicalIF":7.9,"publicationDate":"2025-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144757507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of double-layer capacitance, Warburg finite-length impedance and AC conductivity of PVA/MWCNT nanocomposite films for supercapacitor applications","authors":"Ahmad Hakamy","doi":"10.1016/j.jpowsour.2025.238032","DOIUrl":"10.1016/j.jpowsour.2025.238032","url":null,"abstract":"<div><div>The novelty of this study is in the in-depth investigation of double-layer capacitance and Warburg finite-length impedance for polyvinyl alcohol/multi-walled carbon nanotube PVA-MWCNT polymeric nanocomposite films. The dispersion of MWCNTs in an aqueous solution is difficult; however, good dispersion can be achieved with suitable use of tannic acid and sonication. In this study, the concentrations of MWCNTs were 0.125 and 1 wt%. In Nyquist plots, electrochemical impedance spectroscopy parameters of experimental data are obtained by fitting curves using the ZSimpWin software. Results indicate that as MWCNT ratios increase, the radius of a semicircle, the charge transfer resistance <span><math><mrow><mo>(</mo><msub><mi>R</mi><mrow><mi>c</mi><mi>t</mi></mrow></msub></mrow></math></span>) and the Warburg resistance coefficient <span><math><mrow><mo>(</mo><mi>σ</mi></mrow></math></span>) decrease, the double-layer capacitance (<span><math><mrow><msub><mi>C</mi><mrow><mi>d</mi><mi>l</mi></mrow></msub><mo>)</mo></mrow></math></span> increases and other impedance properties improve. In addition, the equivalent circuit model is <span><math><mrow><mo>[</mo><msub><mi>R</mi><mi>s</mi></msub><mrow><mo>(</mo><mrow><msub><mi>C</mi><mrow><mi>d</mi><mi>l</mi></mrow></msub><mo>∥</mo><msub><mi>R</mi><mrow><mi>c</mi><mi>t</mi></mrow></msub><mi>W</mi></mrow><mo>)</mo></mrow></mrow></math></span>. PVA-MWCNT nanocomposites films containing 1.0 wt% exhibited Warburg finite-length impedance (<span><math><mrow><mi>W</mi></mrow></math></span>) at extremely lower resistance values in those solid polymer electrolyte (SPE) films. In industry, small <span><math><mrow><msub><mi>R</mi><mrow><mi>c</mi><mi>t</mi></mrow></msub></mrow></math></span>, high <span><math><mrow><msub><mi>C</mi><mrow><mi>d</mi><mi>l</mi></mrow></msub></mrow></math></span> and very low <span><math><mrow><mi>σ</mi></mrow></math></span> can be advantageous for the application of SPEs in supercapacitors, batteries and high-temperature supercapacitors.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"656 ","pages":"Article 238032"},"PeriodicalIF":7.9,"publicationDate":"2025-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144757833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fast approach of Zn doping for enhanced electrocatalytic performance of mixed spinel CoFe2O4 nanoparticles for water splitting","authors":"Prathamesh Chougale ,&nbsp;Mahesh Burud ,&nbsp;Akshata Pattanshetti ,&nbsp;Amruta Koli ,&nbsp;Shubhangi Mane-Gavade ,&nbsp;Kiran Shinde ,&nbsp;Ki Buem Kim ,&nbsp;Jian Shen ,&nbsp;Avinash Ramteke ,&nbsp;Sandip Sabale ,&nbsp;Deok-kee Kim","doi":"10.1016/j.jpowsour.2025.238038","DOIUrl":"10.1016/j.jpowsour.2025.238038","url":null,"abstract":"<div><div>Developing cost-effective, high-performance electrocatalysts to substitute expensive noble metal-based catalysts is critical for advancing water splitting technologies. This study presents a novel method that utilizes an induction-driven combustion synthesis of zinc-doped cobalt ferrite (ZCF) nanoparticles (NPs) as an electrocatalyst for water splitting. The influence of different Zn concentrations in cobalt ferrite on the electrochemical performance is systematically investigated. The optimized ZCF0.5 sample demonstrates excellent catalytic activity, achieving overpotentials of 280 mV for the oxygen evolution reaction (OER) and −220 mV for the hydrogen evolution reaction (HER) at 10 mA/cm² of current density. Additionally, ZCF0.5 exhibits a low electrolysis cell voltage of 1.64 V at 10 mA/cm² and outstanding long-term stability. This work highlights a scalable and sustainable approach for synthesizing ferrite-based electrocatalysts, offering a capable alternative to noble metal-based catalysts for electrochemical water splitting applications.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"656 ","pages":"Article 238038"},"PeriodicalIF":7.9,"publicationDate":"2025-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144757814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Succinonitrile coordination-induced in situ polymerization-based composite solid electrolytes for solid-state batteries","authors":"Young-Woong Song ,&nbsp;Hyochan Lee ,&nbsp;Sejung Park ,&nbsp;Sang-Jun Park ,&nbsp;Min-Young Kim ,&nbsp;Changhun Yun ,&nbsp;Jaekook Kim ,&nbsp;Jinsub Lim","doi":"10.1016/j.jpowsour.2025.237924","DOIUrl":"10.1016/j.jpowsour.2025.237924","url":null,"abstract":"<div><div>As a next-generation battery material, solid electrolytes (SEs) are essential to realize high stability and high energy density applications. However, SEs have poor interfacial contact between electrodes. In this study, a novel SE is fabricated via the in situ polymerization of poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and a composite solid electrolyte (CSE) based on Ga and Rb-doped Li₇La₃Zr₂O₁₂ (LLZO), using precursor solutions of polyethylene glycol methyl ether acrylate (PEGMEA) and succinonitrile (SN). This well-designed electrolyte exhibits high ionic conductivity (1.3 × 10⁻⁴ S cm⁻¹) at 30 °C, wide electrochemical window of 4.9 V (vs. Li/Li⁺), and high Li-ion transference number of 0.84. In addition, it can maintain a stable interface with Li metal, which shows high long-term cycling stability in LFP- and NCM-based cells. Cells manufactured as pouch cells under various abuse conditions show excellent durability, demonstrating the potential of the proposed solid electrolyte for next-generation secondary batteries.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"656 ","pages":"Article 237924"},"PeriodicalIF":7.9,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144749490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Scalable synthesis of nano silicon-embedded graphite for high-energy and low-expansion lithium-ion batteries","authors":"Lingrong Xu ,&nbsp;Zhuohua Quan ,&nbsp;Fei Wang ,&nbsp;Anbang Lu ,&nbsp;Qi Zhao ,&nbsp;Weidong Zhang ,&nbsp;Zhuorui Tang ,&nbsp;Dai Dang ,&nbsp;Quanbing Liu ,&nbsp;Chengzhi Zhang","doi":"10.1016/j.jpowsour.2025.238022","DOIUrl":"10.1016/j.jpowsour.2025.238022","url":null,"abstract":"<div><div>Silicon is considered a highly promising anode material due to its environmental friendliness, natural abundance, and exceptionally high theoretical capacity for lithium-ion batteries. Nonetheless, substantial volume expansion impedes the economic viability of silicon anodes. This study involves the incorporation of silicon nanoparticles into a stable expanded graphite (EG)/pitch-derived carbon structure (EGC) following a reinforcing technique applied to EG using pitch. The EGC-Si composite, featuring silicon embedded within the EGC matrix, offers a durable architecture that effectively accommodates the significant volume changes of silicon particles during cycling. Furthermore, the engineered architecture of EGC-Si enhances ion diffusion while facilitating rapid electron transport through its varied porous architectures and carbon frameworks. The EGC-Si anode demonstrates a specific capacity of 699.9 mAh g⁻¹ at 0.1 A g⁻¹ and retains cycle stability over 400 cycles at 1.0 A g⁻¹. Furthermore, the EGC-Si electrode shows only a 6.6 % volume swelling ratio after full lithiation, which attribute to the well-designed ECG structure. This robust and well-integrated silicon/graphite structure offers a promising strategy to fully harness the potential of Si/Carbon composite anodes for high-performance lithium-ion storage.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"656 ","pages":"Article 238022"},"PeriodicalIF":7.9,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144749491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Anion-driven interfacial engineering and solvation structure modulation of imidazolium-based ionic liquid electrolyte additives for enhanced Zn anode reversibility","authors":"Sheetal Solanki ,&nbsp;Sweta Jha ,&nbsp;Praveenkumar Sappidi ,&nbsp;Prashant Kumar Gupta","doi":"10.1016/j.jpowsour.2025.238019","DOIUrl":"10.1016/j.jpowsour.2025.238019","url":null,"abstract":"<div><div>Reversibility of Zn plating/stripping is greatly impacted by dendrite formation, hydrogen evolution reaction (HER) and passivation in zinc-ion battery. To effectively mitigate these challenges, it is essential to optimize the electrode-electrolyte interface, the Zn²⁺ ions solvation structure and its transport properties. In this work, the electrochemical performances of Zn||Zn symmetrical cells are investigated by using different electrolytes such as 1 M zinc tetrafluoroborate, 1 M zinc acetate and 1 M zinc chloride aqueous solution with addition of 0.1 M ionic liquids (ILs) as an electrolyte additive. We consider different types of imidazolium based ILs such as 1-ethyl-3-methylimidazolium tetrafluoroborate [EMIM][BF₄], 1-ethyl-3-methylimidazolium acetate [EMIM][Ac] and 1-ethyl-3-methylimidazolium chloride [EMIM][Cl]. The molecular level intermolecular interactions between the anions and Zn²⁺ ions show an influence on the solvation structure and dynamic behavior of Zn²⁺ ions. As a result, the Zn||Zn symmetrical cell with 1-ethyl-3-methylimidazolium acetate as an electrolyte additive demonstrate cycling stability of more than 1350 h at a current density of 1 mA cm⁻² and deposition capacity of 1 mAh cm⁻². Detailed molecular dynamics simulations are performed to understand the underlying molecular mechanism regarding the structure and ion dynamic behaviour of Zn²⁺ ions, which agree with experimental results.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"656 ","pages":"Article 238019"},"PeriodicalIF":7.9,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144757944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Single-objective parameter optimization of process intensification of mass transfer in the proton exchange membrane fuel cell with V-shaped boomerang-inspired flow field structures","authors":"Sumin Tang ,&nbsp;Fan Fan ,&nbsp;Haoyan Fang ,&nbsp;Yong Zhang ,&nbsp;Qingshan Liu","doi":"10.1016/j.jpowsour.2025.238005","DOIUrl":"10.1016/j.jpowsour.2025.238005","url":null,"abstract":"<div><div>This study aims to optimize the FF structure of the V-shaped boomerang-inspired (VSBI) by analyzing the impact of various FF configurations on cell performance. Firstly, the research indicates that the contact-type VSBI structure demonstrates superior mass transfer and electrochemical matching characteristics in high current density regions compared to other FF configurations. Secondly, variations in geometric configuration significantly influence FF performance. The second VSBI structure, characterized by a tapered channel design, effectively mitigates gas flow separation, resulting in higher output current density and a more uniform oxygen distribution. Further investigation reveals that dimensional parameters substantially affect the transport of reactant gases and the distribution of liquid water within the cell. The original-sized VSBI structure exhibits optimal output voltage and favorable liquid water drainage characteristics. Additionally, adjustments to the angle of the structure influence the electrochemical reaction rate, with an optimal angle of 136.4° identified. This configuration effectively enhances the overall performance of the cell and improves the uniformity of the internal mass distribution. Finally, based on different substrate arrangement methods, it is found that the first layout is the most effective in optimizing output current density and the uniformity of liquid water distribution.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"656 ","pages":"Article 238005"},"PeriodicalIF":7.9,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144757813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}