Advanced Energy Materials最新文献

{"title":"Reaction Kinetics Regulation Suppressed Carrier Recombination Loss for High-Efficient Solution-Based Antimony Selenosulfide Photovoltaic Devices","authors":"Boyang Fu, Jun Xiong, Tianhua Jv, Shuo Chen, Tianquan Liang, Hongli Ma, Xianghua Zhang, Daocheng Pan, Bingsuo Zou, Guangxing Liang, Donglou Ren","doi":"10.1002/aenm.202500586","DOIUrl":"https://doi.org/10.1002/aenm.202500586","url":null,"abstract":"Carrier recombination loss within the emerging antimony selenosulfide (Sb₂(S,Se)₃) photovoltaic devices is a critical factor limiting the photovoltaic performance. Herein, a reaction kinetics regulation strategy is reported to simultaneously passivate deep-level intrinsic defect and inhibit the oxide impurities in Sb₂(S,Se)₃ absorber with the help of sodium borohydride (SB). The SB, on one hand due to the alkaline feature, can significantly promote the decomposition of selenourea and Sb₂Se₃ formation, eliminating the deep-level Sb_S1 defects and reducing the V_S defects, and on the other hand, owing to the reducing property, can restore SbO⁺ ions to Sb³⁺, thus inhibiting the Sb₂O₃ formation and improving heterogeneous nucleation with preferable [hk1] orientation. These collective influences have remarkably suppressed carrier recombination loss and strengthened carrier collection with optimal band alignment. Consequently, high-efficient Sb₂(S,Se)₃ photovoltaic devices with an efficiency of 10.62% (0.0684 cm²) are gained, which is comparable to the latest-recorded value of 10.7% (0.0389 cm²). This work provides a feasible reaction kinetics regulation method for suppressing carrier recombination loss of Sb-based chalcogenide materials and supplies precious instruction for preparing high-performance optoelectronic devices.","PeriodicalId":111,"journal":{"name":"Advanced Energy Materials","volume":"9 1","pages":""},"PeriodicalIF":27.8,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143897662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Permanent Lithiophilic Layer for Anode-Free Lithium-Hydrogen Gas Battery","authors":"Yirui Ma, Zaichun Liu, Xinhua Zheng, Nawab Ali Khan, Ruihao Luo, Zhengxin Zhu, Zuodong Zhang, Kai Zhang, Weiping Wang, Yahan Meng, Zehui Xie, Touqeer Ahmad, Wei Chen","doi":"10.1002/aenm.202501912","DOIUrl":"https://doi.org/10.1002/aenm.202501912","url":null,"abstract":"The necessity for high-performance energy storage systems propels extensive research into diverse battery technologies. Among them, the lithium-hydrogen gas (Li//H₂) battery, characterized by high energy density and low cost, is emerging as a promising candidate. Implementing a large areal capacity for the Li metal anode in an anode-free Li//H₂ battery design is essential for achieving higher energy density and further reducing manufacturing costs. Here the study reports a permanent Li-SiO_x lithiophilic layer in-situ generated on a Cu substrate during the Li//H₂ battery initial charge that facilitates homogeneous Li nucleation and drives the formation of a dense and thick Li deposition layer. The study manages to maintain the lithiation state to avoid the repetition of lithiation/de-lithiation and significantly reduce the Li nucleation barrier. The anode-free Cu@Li-SiO_x//H₂ battery with a high areal capacity of 5 mAh cm⁻² exhibits promising cycling stability with a Coulombic efficiency of up to 99.1% under a current density of 1 mA cm⁻². Moreover, the significantly reduced Li nucleation barrier results in an increased round-trip energy efficiency reaching up to 93.20%. This work proposes a novel strategy for constructing a lithiophilic layer to enhance the practical feasibility of large areal capacity anode-free Li//H₂ batteries.","PeriodicalId":111,"journal":{"name":"Advanced Energy Materials","volume":"27 1","pages":""},"PeriodicalIF":27.8,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143897579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 Pore Functionality in Multicomponent Covalent Organic Frameworks on Stable Long-Term Photocatalytic H2 Production","authors":"Prasenjit Das, Gouri Chakraborty, Jin Yang, Jérôme Roeser, Hüseyin Küçükkeçeci, Anh Dung Nguyen, Michael Schwarze, Jose Gabriel, Christopher Penschke, Shengjun Du, Vincent Weigelt, Islam E. Khalil, Johannes Schmidt, Peter Saalfrank, Martin Oschatz, Jabor Rabeah, Reinhard Schomäcker, Franziska Emmerling, Arne Thomas","doi":"10.1002/aenm.202501193","DOIUrl":"https://doi.org/10.1002/aenm.202501193","url":null,"abstract":"In nature, organic molecules play a vital role in light harvesting and photosynthesis. However, regarding artificial water splitting, the research focus is primarily on inorganic semiconductors. Although organic photocatalysts have high structural variability, they tend to exhibit lower quantum efficiencies for water splitting than their inorganic counterparts. Multicomponent reactions (MCRs) offer an attractive route to introduce different functional units into covalent organic frameworks (COFs) and enable semiconducting properties and high chemical stability, creating promising materials for long-term photocatalytic applications, such as H₂ production. Herein, five highly crystalline donor-acceptor based, 4-substituted quinoline-linked MCR-COFs are presented that are prepared via the three-component Povarov reaction. The pore functionality is varied by applying different vinyl derivatives (e.g., styrene, 2-vinyl pyridine, 4-vinylpyridine, 4-vinyl imidazole, 2,3,4,5,6-pentafluorostyrene), which has a strong influence on the obtained photocatalytic activity. Especially an imidazole-functionalized COF displays promising photocatalytic performance due to its high surface area, crystallinity, and wettability. These properties enable it to maintain its photocatalytic activity even in a membrane support. Furthermore, such MCR-COFs display dramatically enhanced (photo)chemical stability even after long-term solar light irradiation and exhibit a high and steady H₂ evolution for at least 15 days.","PeriodicalId":111,"journal":{"name":"Advanced Energy Materials","volume":"1 1","pages":""},"PeriodicalIF":27.8,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143897663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Poly(fluorene)-Based Anion Exchange Membrane Demonstrating Excellent Durability at 1.5 A cm‒2 for 2400 h in Water Electrolyzers","authors":"Haeryang Lim, Nam In Kim, Giwon Shin, Jaehun Lee, Sungryong Kim, Shin-Woo Myeong, Chiho Kim, Sung Mook Choi, Taiho Park","doi":"10.1002/aenm.202501038","DOIUrl":"https://doi.org/10.1002/aenm.202501038","url":null,"abstract":"Anion exchange membrane water electrolyzer (AEMWE) is a cost-effective alternative to proton exchange membrane water electrolyzer for green hydrogen production. However, AEMWE commercialization is hindered primarily by the lack of a reliable anion exchange membrane (AEM) for long-term cell durability. In this study, a poly(fluorene)-based PFAA-QA AEM is developed with a simple structure, exhibiting satisfactory OH⁻ conductivity (&gt;174.6 mS cm⁻¹ at 80 °C), good mechanical properties (tensile strength &gt;35 MPa and elongation at break &gt;51%), and excellent alkaline stability (&gt;2000 h in 3 <span>m</span> KOH at 80 °C). These characteristics allow PFAA-QA-based AEMWEs to demonstrate a high cell performance (3.95 A cm⁻² at 70 °C and 1.95 V) and long-term durability at high current densities (1.5 A cm⁻² for 2400 h at 70 °C). Therefore, the durability of these AEMWEs surpasses that of most AEMWEs with a low voltage decay rate (&gt;29 mV kh⁻¹).","PeriodicalId":111,"journal":{"name":"Advanced Energy Materials","volume":"89 1","pages":""},"PeriodicalIF":27.8,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143897575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efficient and Moisture Resistant Wide-Bandgap Perovskite Solar Cells with Phosphinate-Based Iodine Defect Passivation","authors":"Yuting Song, Ziyan Liu, Xinhang Cai, Haoyu Ge, Xuelian Liu, Xianzhao Wang, Aijun Li, Tsutomu Miyasaka, Naoyuki Shibayama, Xiao-Feng Wang","doi":"10.1002/aenm.202500650","DOIUrl":"https://doi.org/10.1002/aenm.202500650","url":null,"abstract":"Commercialization of perovskite-based tandem solar cells requires preparing wide-bandgap (WBG) perovskites in an ambient atmosphere environment. Here, producing high-performance and stable WBG perovskite solar cells (PSCs) is demonstrated with blade coating in ambient air (≈60% relative humidity, RH) using sodium benzene phosphinate (SBP) as an additive modulator in the perovskite precursor. SBP can effectively suppress I⁻ oxidation in high humidity ambient air, inhibit ion migration, and thus inhibit phase separation; it also modulates the crystallization of perovskite grains, passivates surface defects, and improves the hydrophobicity of perovskite film. The devices incorporating SBP achieved a power conversion efficiency (PCE) of up to 22.1%, which is the state-of-the-art result for the WBG PSCs (≥1.68 eV) fabricated in ambient air with the blade coating method. In addition, the same protocol produces a PCE of 20.1% for a larger area cell (1.05 cm²), and a PCE of over 19.5% for unit cells on a 100cm² substrate. The unencapsulated devices exhibit excellent stability, i.e., 90.3% efficiency retention after 2000 h with air exposure (≈60% RH) and 86.3% efficiency retention after 1000 h at 85 °C in an argon atmosphere. This SBP-based material modulation for the preparation of WBG PSCs provides a new opportunity for manufacturing perovskite photovoltaics.","PeriodicalId":111,"journal":{"name":"Advanced Energy Materials","volume":"87 1","pages":""},"PeriodicalIF":27.8,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143897661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sulfonated Polybenzimidazole Membranes: How Sulfonation Affects Properties, Stability, and Performance in Vanadium Redox Flow Batteries","authors":"Trung Tuyen Bui, Sungmin Park, Mingyu Shin, Muhammad Mara Ikhsan, Yongchai Kwon, Dirk Henkensmeier","doi":"10.1002/aenm.202500440","DOIUrl":"https://doi.org/10.1002/aenm.202500440","url":null,"abstract":"Poly(4,4′-diphenylether-5,5′-bibenzimidazole), OPBI, is sulfonated at different conditions to reach different degrees of sulfonation (DOS of 35, 54, 102, and 133%). The membrane with a DOS of 102% shows the most balanced properties. The tensile strength is 55 MPa and the elongation at break is 130%. Conductivity in 3 <span>m</span> sulfuric acid exceeds that of Nafion 212 (58 mS cm⁻¹) and reaches 70 mS cm⁻¹. The resistance of a 23 µm thick membrane is 33 mΩ cm², and energy efficiencies of 91.8% at 80 mA cm⁻² and 90.4% at 100 mA cm⁻² are achieved. OPBI showed the highest stability in contact with VO₂⁺, because the ions cannot enter the membrane. Sulfonated OPBI swells more in sulfuric acid, and therefore has a lower stability. However, it is found that the stability increases with the DOS. This indicates that attack by VO₂⁺ occurs preferentially at positions that are activated for electrophilic aromatic substitution reactions.","PeriodicalId":111,"journal":{"name":"Advanced Energy Materials","volume":"35 1","pages":""},"PeriodicalIF":27.8,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143890282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Manganese-Based Layered Oxide Cathodes for Potassium-Ion Batteries: Progress and Outlook","authors":"Bohan Zhang, YoonJeong Choi, Zhenyu Zhu, Shuoqing Zhao, Shaojun Guo","doi":"10.1002/aenm.202501657","DOIUrl":"https://doi.org/10.1002/aenm.202501657","url":null,"abstract":"Manganese-based layered oxide cathodes (MLOCs) have emerged as competitive candidates for high-performance rechargeable batteries. Building on their success in lithium-ion batteries (LIBs), MLOCs hold great promise for the rapidly developing field of potassium-ion batteries (PIBs) due to their low cost, high theoretical capacity, and environmental friendliness. However, several technical challenges, including poor structural stability, multiple phase transitions, and potassium deficiency, have hindered their progress in PIB research. This review provides a comprehensive overview of MLOCs, covering their crystal structures, reaction mechanisms, chemical compositions, and applications in PIBs. More importantly, the study critically analyzes the key challenges impeding their development and discusses potential strategies for overcoming these limitations. Recent advances in MLOC-based potassium-ion full cells are also summarized, highlighting their progress and future potential. Finally, the study offers perspectives on the future development of MLOCs in next-generation energy storage technologies. It is hoped that this review will spark strong interest from both academic and industrial communities, driving further research and accelerating the practical application of MLOCs in high-performance PIBs.","PeriodicalId":111,"journal":{"name":"Advanced Energy Materials","volume":"24 1","pages":""},"PeriodicalIF":27.8,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143890285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Eco-Friendly Soy Protein-Based Solid-State Electrolyte Exhibiting Stable High-Rate Cyclic Performances by Molecular Regulation Design","authors":"Yue Li, Peipei Ding, Li Cai, Lin Shi, Yang Zhao, Hong Liu, Haocheng Yuan, Dengfeng Yu, Chuangjie Guo, Qiang Gao, Liangliang Li, Yaoyu Ren, Cewen Nan, Yang Shen","doi":"10.1002/aenm.202501056","DOIUrl":"https://doi.org/10.1002/aenm.202501056","url":null,"abstract":"Solid-state electrolytes play critical roles in solid-state lithium-ion batteries. In this study, soy protein (SP), a green and renewable biomass polymer, is explored as a backbone for solid-state electrolytes. SP-based solid-state electrolytes (SPPV@VEC-SSEs) are prepared with the soft-hard interpenetrating network by modulating the molecular structure of SP. In this process, the active groups on SP are utilized to form hydrogen bonds with polyvinylidene difluoride (PVDF), constructing a hard phase cross-linked network, which causes the folded quaternary structure of the SP to unfold and create more lithium ion transport channels; Then vinylethylene carbonate (VEC) monomers are infused into this network and are cross-linked through free radical polymerization to form a soft-hard interpenetrating cross-linked network, enhancing both the availability of lithium-ion transport sites and the improvement of interfacial performance. The SP-based solid-state electrolytes exhibit high ionic conductivity (7.95 × 10⁻⁴ S cm⁻¹) and Li⁺ transference number (0.78) at 60 °C. The corresponding LFP||SPPV3@VEC-SSEs||Li battery delivers good cyclic stability up to &gt;800 cycles under high temperature of 120 °C and high cycling rate of 2 C. Results of experimental and theoretical analysis reveal that the construction of the soft-hard interpenetrating network facilitates the unfolding of the quaternary structure of SP, exposing more oxygen-containing groups and cationic groups which effectively bind with Li⁺ ions and anions of lithium salts. The zwitterionic structure of SP not only gives rise to high ionic conductivity but promotes the formation of a stable interface layer between the solid-state electrolyte and electrodes. Compared to organic polymer electrolytes (polyethylene oxide (PEO) and poly(trimethyl carbonate) (PTMC)), the SPPV@VEC-SSEs exhibit an order of magnitude lower release of organic volatiles, significantly reducing their environmental impact across the entire lifecycle. This work provides a pathway for preparing bio-based sustainable solid-state electrolytes with long lifespans under extreme conditions.","PeriodicalId":111,"journal":{"name":"Advanced Energy Materials","volume":"35 1","pages":""},"PeriodicalIF":27.8,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143890281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dendrite Elimination by Regulating Ion and Electron Distribution at the Electrode-Electrolyte Interface","authors":"Junchao Zhu, Guoquan Jiang, Qingchun Chen, Nan Qiu, Yuan Wang","doi":"10.1002/aenm.202501196","DOIUrl":"https://doi.org/10.1002/aenm.202501196","url":null,"abstract":"While planar Zn deposition is extensively explored for dendrite suppression, the critical stripping process governing morphology evolution remains underexplored. An interfacial ion/electron redistribution strategy is proposed that establishes bidirectional regulation of plating/stripping dynamics through rationally designed Cu microsquare-patterned Zn electrodes. The heterogeneous Cu microsquare makes interfacial ion/electron redistributed, and random dendritic growth is restricted to certain regions and is no longer characterized by sustained growth. This interfacial engineering synergistically enhances ionic transfer in topographically guided bare Zn gaps while simultaneously activating preferential dendrite dissolution through surface energy-mediated overpotential elevation. The coordinated dual mechanism spatially confines stripping reactions within designated zones, achieving spontaneous dendrite eradication. In contrast to previous works concentrating on artificial interfacial layers or patterned designs, this work not only highlights the importance of adjusting ion and electron distribution in the plating/stripping process but also emphasizes the significance of confined and preferential regions in electrode design, achieving dendrite elimination. Consequently, the modified Zn electrode enables symmetric Zn//Zn cells to achieve over 2000 h cycling stability at 0.25 mA cm⁻². Furthermore, the modified Zn anode enables Zn//MnO₂ cells to show a ≈80% improvement in specific capacity after 1800 cycles at 1.0 A g⁻¹ compared to bare Zn anodes.","PeriodicalId":111,"journal":{"name":"Advanced Energy Materials","volume":"71 1","pages":""},"PeriodicalIF":27.8,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143890283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fast-Charging Long-Life Solid-State Sodium Metal Batteries Enabled by 2D Boron Nitride Nanosheets Based Quasi-Solid-State Electrolytes","authors":"Jiayu Shen, Xiaoyu Shi, Feifei Xing, Endian Yang, Zhihao Ren, Shihao Liao, Shaohua Chen, Yanfeng Dong, Zhong-Shuai Wu","doi":"10.1002/aenm.202500776","DOIUrl":"https://doi.org/10.1002/aenm.202500776","url":null,"abstract":"Solid-state sodium metal batteries (SSMBs) are considered as one highly competitive, high-energy-density yet safe energy storage device, however, the conventional quasi-solid-state electrolytes (QSSEs) still suffer from low ion conductivity and limited mechanical properties. Herein, a safe, fast-charging, and long-life SSMB is reported, utilizing photopolymerized ethoxylated trimethylpropane triacrylate based QSSEs (BN-QSSE) reinforced by 2D functional fillers of boron nitride nanosheets (BNNSs). The BNNSs with high Young's modulus in BN-QSSE can simultaneously accelerate and homogenize ion transport for uniform Na deposition and form a robust electrolyte-Na interface. Only a low proportion of 1% BNNSs in BN-QSSE can effectively realize high ionic conductivity of 1 × 10⁻² mS cm⁻¹, achieve a wide electrochemical stability window of 4.85 V (vs. Na/Na⁺), and substantively suppress Na dendrites. The resulting Na||BN-QSSE||Na symmetric batteries exhibit a long life of 600 h at 0.1 mA cm⁻² and 0.1 mAh cm⁻². The as-assembled Na₃V₂(PO₄)₃||BN-QSSE||Na full batteries display high capacities of 102 mAh g⁻¹ at 1 C and 75 mAh g⁻¹ at a high rate of 15 C, and maintain 93% of the initial discharge capacity after 1000 cycles at 10 C, outperforming most reported SSMBs. The developed 2D filler-reinforced QSSE provides new opportunities for high-performance SSMBs.","PeriodicalId":111,"journal":{"name":"Advanced Energy Materials","volume":"25 1","pages":""},"PeriodicalIF":27.8,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143890284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}