Advanced Powder Materials最新文献

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Construction interlayer structure of hydrated vanadium oxides with tunable P-band center of oxygen towards enhanced aqueous Zn-ion batteries 构建具有可调氧p带中心的水合钒氧化物层间结构
Advanced Powder Materials Pub Date : 2023-11-15 DOI: 10.1016/j.apmate.2023.100167
Ziyi Feng , Yunlong Zhang , Zhanming Gao , Dida Hu , Hanmei Jiang , Tao Hu , Changgong Meng , Yifu Zhang
{"title":"Construction interlayer structure of hydrated vanadium oxides with tunable P-band center of oxygen towards enhanced aqueous Zn-ion batteries","authors":"Ziyi Feng ,&nbsp;Yunlong Zhang ,&nbsp;Zhanming Gao ,&nbsp;Dida Hu ,&nbsp;Hanmei Jiang ,&nbsp;Tao Hu ,&nbsp;Changgong Meng ,&nbsp;Yifu Zhang","doi":"10.1016/j.apmate.2023.100167","DOIUrl":"https://doi.org/10.1016/j.apmate.2023.100167","url":null,"abstract":"<div><p>Layered materials with adjustable framework, as the most potential cathode materials for aqueous rechargeable zinc ion batterie, have high capacity, permit of rapid ion diffusion, and charge transfer channels. Previous studies have widely investigated their preparation and storage mechanism, but the intrinsic relationship between the structural design of layered cathode materials and electrochemical performance has not been well established. In this work, based on the first principles calculations and experiments, a crucial strategy of pre-intercalated metal-ions in vanadium oxide interlayer with administrable p-band center (<em>ɛ</em><sub>p</sub>) of O is explored to enhance Zn<sup>2+</sup> storage. This regulation of the degree of covalent bond and the average charge of O atoms varies the binding energy between Zn<sup>2+</sup> and O, thus affecting the intercalation/de-intercalation of Zn<sup>2+</sup>. The present study demonstrates that <em>ɛ</em><sub>p</sub> of O can be used as an important indicator to boost Zn<sup>2+</sup> storage, which provides a new concept toward the controlled design and application of layered materials.</p></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"3 2","pages":"Article 100167"},"PeriodicalIF":0.0,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772834X23000593/pdfft?md5=95e5e935f54476d3366e2235ee4df369&pid=1-s2.0-S2772834X23000593-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138423272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Self-recoverable NIR mechanoluminescence from Cr3+ doped perovskite type aluminate 掺Cr3+钙钛矿型铝酸盐的自恢复近红外机械发光
Advanced Powder Materials Pub Date : 2023-11-08 DOI: 10.1016/j.apmate.2023.100165
Peishan Shao , Puxian Xiong , Yao Xiao , Zhicong Chen , Dongdan Chen , Zhongmin Yang
{"title":"Self-recoverable NIR mechanoluminescence from Cr3+ doped perovskite type aluminate","authors":"Peishan Shao ,&nbsp;Puxian Xiong ,&nbsp;Yao Xiao ,&nbsp;Zhicong Chen ,&nbsp;Dongdan Chen ,&nbsp;Zhongmin Yang","doi":"10.1016/j.apmate.2023.100165","DOIUrl":"10.1016/j.apmate.2023.100165","url":null,"abstract":"<div><p>Mechanoluminescent (ML) materials, which have the ability to convert mechanical energy to optical energy, have found huge promising applications such as in stress imaging and anti-counterfeiting. However, the main reported ML phosphors are based on trap-related ones, thus hindering the practical applications due to the requirement of complex light pre-irradiation process. Here, a self-recoverable near infrared (NIR) ML material of LaAl<sub>1-x</sub>O<sub>3</sub>: xCr<sup>3+</sup> (x=0.2 ​%, 0.4 ​%, 0.6 ​%, 0.8 ​%, 1.0 ​%, and 1.2 ​%) has been developed. Based on the preheating method and corresponding ML performance analysis, the influences of residual carriers are eliminated and the detailed dynamic luminescence process analysis is realized. Systematic experiments are conducted to reveal the origin of the ML emissions, demonstrating that ML is dictated more by the non-centrosymmetric piezoelectric crystal characteristic. In general, this work has provided significant references for exploring more efficient NIR ML materials, which may provide potential applications in anti-counterfeiting and bio-stress sensing.</p></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"3 2","pages":"Article 100165"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772834X2300057X/pdfft?md5=b41af3accf095f55601b158f3e931ec7&pid=1-s2.0-S2772834X2300057X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135515647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Facet-engineered growth of non-layered 2D manganese chalcogenides 非层状二维硫属锰的表面工程生长
Advanced Powder Materials Pub Date : 2023-10-28 DOI: 10.1016/j.apmate.2023.100164
Jingwei Wang , Junyang Tan , Liqiong He , Zhenqing Li , Shengnan Li , Yunhao Zhang , Huiyu Nong , Qinke Wu , Qiangmin Yu , Xiaolong Zou , Hui-Ming Cheng , Bilu Liu
{"title":"Facet-engineered growth of non-layered 2D manganese chalcogenides","authors":"Jingwei Wang ,&nbsp;Junyang Tan ,&nbsp;Liqiong He ,&nbsp;Zhenqing Li ,&nbsp;Shengnan Li ,&nbsp;Yunhao Zhang ,&nbsp;Huiyu Nong ,&nbsp;Qinke Wu ,&nbsp;Qiangmin Yu ,&nbsp;Xiaolong Zou ,&nbsp;Hui-Ming Cheng ,&nbsp;Bilu Liu","doi":"10.1016/j.apmate.2023.100164","DOIUrl":"https://doi.org/10.1016/j.apmate.2023.100164","url":null,"abstract":"<div><p>Non-layered two-dimensional (2D) materials have sparked much interest recently due to their atomic thickness, large surface area, thickness- and facet-dependent properties. Currently, these materials are mainly grown from wet-chemistry methods but suffer from small size, low quality, and multi-facets, which is a major challenge hindering their facet-dependent property studies and applications. Here, we report the facet-engineered growth (FEG) of non-layered 2D manganese chalcogenides (MnX, X ​= ​S, Se, Te) based on the chemical vapor deposition method. The as-grown samples exhibit large-area surfaces of single facet, high-crystallinity, and ordered domain orientation. As a proof-of-concept, we show the facet-dependent electrocatalytic property of non-layered 2D MnSe, proving they are ideal candidates for fundamental research. Furthermore, we elucidate the underlying mechanism of FEG during the vapor growth process by the interfacial energy derived nucleation models. The method developed in this work provides new opportunities for regulating and designing the structure of 2D materials.</p></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"3 2","pages":"Article 100164"},"PeriodicalIF":0.0,"publicationDate":"2023-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772834X23000568/pdfft?md5=5b4b6da275c3382896c48e0092e7f387&pid=1-s2.0-S2772834X23000568-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92002029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microstructure evolution and mechanical properties of Al2O3 foams via laser powder bed fusion from Al particles 激光粉末床熔合制备Al2O3泡沫的微观组织演变及力学性能
Advanced Powder Materials Pub Date : 2023-10-01 DOI: 10.1016/j.apmate.2023.100135
Ye Dong , Annan Chen , Ting Yang , Shuai Gao , Shuning Liu , Bingjian Guo , Hongyi Jiang , Yusheng Shi , Chunze Yan
{"title":"Microstructure evolution and mechanical properties of Al2O3 foams via laser powder bed fusion from Al particles","authors":"Ye Dong ,&nbsp;Annan Chen ,&nbsp;Ting Yang ,&nbsp;Shuai Gao ,&nbsp;Shuning Liu ,&nbsp;Bingjian Guo ,&nbsp;Hongyi Jiang ,&nbsp;Yusheng Shi ,&nbsp;Chunze Yan","doi":"10.1016/j.apmate.2023.100135","DOIUrl":"https://doi.org/10.1016/j.apmate.2023.100135","url":null,"abstract":"<div><p>Laser powder bed fusion (LPBF) combined with reaction bonding (RB) of Al particles is an effective method for preparing high-performance 3D Al<sub>2</sub>O<sub>3</sub> ceramic foams. However, the indistinct microstructure evolution hinders the regulation of pore features and the improvement of synthetic properties. Herein, the microstructure evolution of the Al<sub>2</sub>O<sub>3</sub> ceramic foams during the LPBF/RB process is clarified by various characterization methods, and the corresponding mechanical property modulation is realized by optimizing LPBF parameters, organic binder (E12 epoxy resin) content, heating rate, sintering time, and coral-like Al<sub>2</sub>O<sub>3</sub> content. The expansion from Al<sub>2</sub>O<sub>3</sub> outward growth and Al granule precipitation counteracts the shrinkage from E12 decomposition and Al<sub>2</sub>O<sub>3</sub> sintering, resulting in an ultra-low shrinkage of 0.94%–3.01%. The pore structures of particle packing pores, hollow spheres, and microporous structures allow a tunable porosity of 52.6%–73.7%. The <em>in-situ</em> formation of multi-scale features including hollow spheres, flaky grains, whiskers, nanofibers, and bond bridges brings about a remarkably high bending strength of 6.5–38.3 ​MPa. Our findings reveal the relationship between microstructure evolution and property optimization of high-performance ceramic foams, with potential significance for microstructure design and practical application.</p></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"2 4","pages":"Article 100135"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49712124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Novel high-entropy perovskite-type symmetrical electrode for efficient and durable carbon dioxide reduction reaction 新型高熵钙钛矿型对称电极,用于高效持久的二氧化碳还原反应
Advanced Powder Materials Pub Date : 2023-10-01 DOI: 10.1016/j.apmate.2023.100129
Dong Zhang , Yao Wang , Yuhan Peng , Yao Luo , Tong Liu , Wei He , Fanglin Chen , Mingyue Ding
{"title":"Novel high-entropy perovskite-type symmetrical electrode for efficient and durable carbon dioxide reduction reaction","authors":"Dong Zhang ,&nbsp;Yao Wang ,&nbsp;Yuhan Peng ,&nbsp;Yao Luo ,&nbsp;Tong Liu ,&nbsp;Wei He ,&nbsp;Fanglin Chen ,&nbsp;Mingyue Ding","doi":"10.1016/j.apmate.2023.100129","DOIUrl":"https://doi.org/10.1016/j.apmate.2023.100129","url":null,"abstract":"<div><p>Excessive emission of carbon dioxide (CO<sub>2</sub>) has posed an imminent threat to human's environment and global prosperity. To achieve a sustainable future, solid oxide electrolysis cell (SOEC), which can efficiently combine CO<sub>2</sub> reduction reaction (CO<sub>2</sub>RR) and renewable energy storage, has become increasingly attractive owing to its unique functionalities. Additionally, symmetrical SOEC (SSOEC) has been considered as one of the most versatile cell configurations due to its simplified process, high compatibility, and low cost. However, the electrode material requirements become very demanding since efficient catalytic-activities are required for both CO<sub>2</sub>RR and oxygen evolution reaction (OER). Herein, we demonstrate a novel high-entropy perovskite type symmetrical electrode Pr<sub>0.5</sub>Ba<sub>0.5</sub>Mn<sub>0.2</sub>Fe<sub>0.2</sub>Co<sub>0.2</sub>Ni<sub>0.2</sub>Cu<sub>0.2</sub>O<sub>3-δ</sub> (HE-PBM) for SSOEC. B-site doping of transition metals such as Mn, Fe, Co, Ni, and Cu in HE-PBM anode has been found to strongly accelerate the OER in the anode. Moreover, the presence of <em>in-situ</em> formed Fe–Co–Ni–Cu quaternary alloy nanocatalysts from HE-PBM cathode under reducing atmosphere has resulted in superior catalytic-activity towards CO<sub>2</sub>RR. The faster kinetics are also reflected by the significantly low polarization resistance of 0.289 ​Ω⋅cm<sup>2</sup> and high electrolysis current density of 1.21 ​A⋅cm<sup>−2</sup> for CO<sub>2</sub>RR at 2.0 ​V and 800 ​°C. The excellent electrochemical performance and stability demonstrate that the high-entropy perovskite material is a promising electrode material in SSOEC for efficient and durable CO<sub>2</sub>RR.</p></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"2 4","pages":"Article 100129"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49733632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 17
Grain-interior planar defects induced by heteroatom monolayer 杂原子单层引起的颗粒内部平面缺陷
Advanced Powder Materials Pub Date : 2023-10-01 DOI: 10.1016/j.apmate.2023.100130
Xingwei Liu , Haibin Wang , Hao Lu , Xuemei Liu , Zhi Zhao , Chao Hou , Lin Gu , Xiaoyan Song
{"title":"Grain-interior planar defects induced by heteroatom monolayer","authors":"Xingwei Liu ,&nbsp;Haibin Wang ,&nbsp;Hao Lu ,&nbsp;Xuemei Liu ,&nbsp;Zhi Zhao ,&nbsp;Chao Hou ,&nbsp;Lin Gu ,&nbsp;Xiaoyan Song","doi":"10.1016/j.apmate.2023.100130","DOIUrl":"https://doi.org/10.1016/j.apmate.2023.100130","url":null,"abstract":"<div><p>A new type of grain-interior planar defect in a ceramic phase in TiC doped cemented tungsten carbides was discovered. It is unique in that the monolayers of metal atoms exist stably in ceramic grains. The planar defects were induced by the ordered heteroatoms distributing on certain crystal planes of the matrix, which are distinct from the known planar defects such as phase-, grain-, and twin-boundaries, stacking faults, and complexions. Detailed characterization on the atomic scale was performed for the composition, structure, and crystallography of the planar defects, and their energy state and stability were evaluated by modeling. It was found that the Ti monolayer assists nucleation of the new WC crystal along the normal direction to its basal plane. Due to the disturbance of the heteroatom layer, the deposition of W and C atoms deviates from the regular sites occupied in the perfect crystal lattice, resulting in variations of the W–C arrangement in the grain structure. Experiments confirmed that tailoring the distribution density of the planar defects could give the best comprehensive mechanical performance with simultaneously outstanding strength and fracture toughness in the materials containing the grain-interior planar defects. This study provides a new strategy to greatly enhance the mechanical properties of materials by introducing and tailoring planar defects in the grain interiors.</p></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"2 4","pages":"Article 100130"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49734194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tailoring the electronic conductivity of high-loading cathode electrodes for practical sulfide-based all-solid-state batteries 为实用的硫化物基全固态电池定制高负载阴极电极的电子导电性
Advanced Powder Materials Pub Date : 2023-10-01 DOI: 10.1016/j.apmate.2023.100136
Huaqing Shen , Shenghao Jing , Siliang Liu , Yuting Huang , Fangbo He , Yang Liu , Zhi Zhuang , Zongliang Zhang , Fangyang Liu
{"title":"Tailoring the electronic conductivity of high-loading cathode electrodes for practical sulfide-based all-solid-state batteries","authors":"Huaqing Shen ,&nbsp;Shenghao Jing ,&nbsp;Siliang Liu ,&nbsp;Yuting Huang ,&nbsp;Fangbo He ,&nbsp;Yang Liu ,&nbsp;Zhi Zhuang ,&nbsp;Zongliang Zhang ,&nbsp;Fangyang Liu","doi":"10.1016/j.apmate.2023.100136","DOIUrl":"https://doi.org/10.1016/j.apmate.2023.100136","url":null,"abstract":"<div><p>Sulfide-based all-solid-state batteries (ASSBs) exhibit unparalleled application value due to the high ionic conductivity and good processability of sulfide solid electrolytes (SSEs). Carbon-based conductive agents (CAs) are often used in the construction of electronic conductive networks to achieve rapid electron transfer. However, CAs accelerate the formation of decomposition products of SSEs, and their effects on sulfide-based ASSBs are not fully understood. Herein, the effect of CAs (super P, vaper-grown carbon fibers, and carbon nanotubes) on the performance of sulfide-based ASSBs is investigated under different cathode active materials mass loading (8 and 25 ​mg·cm<sup>−2</sup>). The results show that under low mass loading, the side reaction between the CAs and the SSEs deteriorates the performance of the cell, while the charge transfer promotion caused by the addition of CAs is only manifested under high mass loading. Furthermore, the gradient design strategy (enrichment of CAs near the current collector side and depletion of CAs near the electrolyte side) is applied to maximize the benefits of CAs in electron transport and reduce the adverse effects of CAs. The charge carrier transport barrier inside the high mass loading electrode is significantly reduced through the regulation of electronic conductivity. Consequently, the optimized electrode achieves a high areal capacity of 5.6 ​mAh·cm<sup>−2</sup> at high current density (1.25 ​mA·cm<sup>−2</sup>, 0.2 ​C) at 25 °C with a capacity retention of 87.85% after 100 cycles. This work provides a promising way for the design of high-mass loading electrodes with practical application value.</p></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"2 4","pages":"Article 100136"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49712167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Highly conductive S-doped FeSe2-xSx microsphere with high tap density for practical sodium storage 高导电s掺杂FeSe2-xSx微球,用于实用的钠存储
Advanced Powder Materials Pub Date : 2023-10-01 DOI: 10.1016/j.apmate.2023.100120
Shuhao Xiao , Jinxia Jiang , Ying Zhu , Jing Zhang , Hanchao Li , Rui Wu , Xiaobin Niu , Jiaqian Qin , Jun Song Chen
{"title":"Highly conductive S-doped FeSe2-xSx microsphere with high tap density for practical sodium storage","authors":"Shuhao Xiao ,&nbsp;Jinxia Jiang ,&nbsp;Ying Zhu ,&nbsp;Jing Zhang ,&nbsp;Hanchao Li ,&nbsp;Rui Wu ,&nbsp;Xiaobin Niu ,&nbsp;Jiaqian Qin ,&nbsp;Jun Song Chen","doi":"10.1016/j.apmate.2023.100120","DOIUrl":"https://doi.org/10.1016/j.apmate.2023.100120","url":null,"abstract":"<div><p>Metal selenides have been explored as promising sodium storage materials owing to their high theoretical capacity. However, sluggish Na<sup>+</sup> diffusion and low electronic conductivity of selenides still hinder their practical applications. Herein, FeSe<sub>2-<em>x</em></sub>S<sub><em>x</em></sub> microspheres have been prepared via a self-doping solvothermal method using NH<sub>4</sub>Fe(SO<sub>4</sub>)<sub>2</sub> as both the Fe and S source, followed by gas phase selenization. The density functional theory calculation results reveal that S doping not only improves the Na adsorption, but also lower the diffusion energy barrier of Na atoms at the S doping sites, at the same time enhance the electronic conductivity of FeSe<sub>2-<em>x</em></sub>S<sub><em>x</em></sub>. The carbon-free nature of the FeSe<sub>2-<em>x</em></sub>S<sub><em>x</em></sub> microspheres results in a low specific surface area and a high tap density, leading to an initial columbic efficiency of 85.6%. Compared with pure FeSe<sub>2</sub>, such FeSe<sub>2-<em>x</em></sub>S<sub><em>x</em></sub> delivers a high reversible capacity of 373.6 mAh·g<sup>−1</sup> at a high current density of 5 ​A·g<sup>−1</sup> after 2000 cycles and an enhanced rate performance of 305.8 mAh·g<sup>−1</sup> at even 50 ​A·g<sup>−1</sup>. Finally, the FeSe<sub>2-<em>x</em></sub>S<sub><em>x</em></sub>//NVP pouch cells have been assembled, achieving high energy and volumetric energy densities of 118 ​Wh·kg<sup>−1</sup> and 272 ​mWh·cm<sup>−3</sup>, respectively, confirming the potential of applications for the FeSe<sub>2-<em>x</em></sub>S<sub><em>x</em></sub> microspheres.</p></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"2 4","pages":"Article 100120"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49711895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Epitaxial growth of Pt–Pd bimetallic heterostructures for the oxygen reduction reaction 氧还原反应中Pt-Pd双金属异质结构的外延生长
Advanced Powder Materials Pub Date : 2023-10-01 DOI: 10.1016/j.apmate.2023.100131
Lian Ying Zhang , Tiantian Zeng , Linwei Zheng , Yanrui Wang , Weiyong Yuan , Mang Niu , Chun Xian Guo , Dapeng Cao , Chang Ming Li
{"title":"Epitaxial growth of Pt–Pd bimetallic heterostructures for the oxygen reduction reaction","authors":"Lian Ying Zhang ,&nbsp;Tiantian Zeng ,&nbsp;Linwei Zheng ,&nbsp;Yanrui Wang ,&nbsp;Weiyong Yuan ,&nbsp;Mang Niu ,&nbsp;Chun Xian Guo ,&nbsp;Dapeng Cao ,&nbsp;Chang Ming Li","doi":"10.1016/j.apmate.2023.100131","DOIUrl":"https://doi.org/10.1016/j.apmate.2023.100131","url":null,"abstract":"<div><p>It is of great importance to design highly active and stable electrocatalysts with low Pt loading to improve the sluggish kinetics of oxygen reduction reaction (ORR) for fuel cells. Herein, we report an epitaxial growth of a Pt–Pd bimetallic heterostructure with a Pt loading as low as 8.02 ​wt%. Both experimental studies and theoretical calculations confirm that the heterointerfaces play a major role in charge redistribution, which accelerates electron transfer from Pd to Pt, contributing to downshifting the d-band center of Pd and consequently greatly weakening the O adsorption energy for a critical optimal adsorption configuration of O∗ on the heterointerface. In particular, the adsorbed O∗, an intermediate in a bridge mode between adjacent Pt and Pd atoms, has a relative low adsorption energy, which easily forms H<sub>2</sub>O to escape for releasing the active sites toward ORR. The Pt–Pd heterostructured catalyst presents the highest mass activity of 6.06 A·mg<sup>−1</sup><sub>Pt</sub> among all reported Pt–Pd alloyed or composited catalysts, which is 26.4 times of the sample Pt/C (0.23 A·mg<sup>−1</sup><sub>Pt</sub>). Further, the fuel cell assembled by the electrocatalyst shows a current density of 1.23 ​A·cm<sup>−2</sup> at 0.6 ​V and good stability for over 100 ​h.</p></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"2 4","pages":"Article 100131"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49733635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Towards establishing uniform metrics for evaluating the safety of lithium metal batteries 建立统一的评价锂金属电池安全性的指标
Advanced Powder Materials Pub Date : 2023-10-01 DOI: 10.1016/j.apmate.2023.100139
Zequan Zhao , Xiyao Zhao , Yiming Zhou , Siliang Liu , Guozhao Fang , Shuquan Liang
{"title":"Towards establishing uniform metrics for evaluating the safety of lithium metal batteries","authors":"Zequan Zhao ,&nbsp;Xiyao Zhao ,&nbsp;Yiming Zhou ,&nbsp;Siliang Liu ,&nbsp;Guozhao Fang ,&nbsp;Shuquan Liang","doi":"10.1016/j.apmate.2023.100139","DOIUrl":"https://doi.org/10.1016/j.apmate.2023.100139","url":null,"abstract":"<div><p>Lithium metal batteries (LMBs) with ultra-high theoretical energy densities are regarded as excellent candidates for the next energy storage devices. Unfortunately, there are many factors can cause the temperature of LMBs to exceed a safe range and trigger thermal runaway. Countless effort has been invested in designing safe components of batteries to realize the application of LMBs. However, most studies only focus on one single aspect since there is no uniform metrics for evaluating the safety of LMBs. Herein, this review comprehensively summarizes all the trigger factors of thermal runaway and proposes the complete safety metrics of LMBs. A comprehensive overview of the development of safe LMBs is provided to discuss the gap between studies and practical applications. Finally, the future directions of academic research are proposed according to the challenges existing in current studies.</p></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"2 4","pages":"Article 100139"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49712387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
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