Rare Metals最新文献_第9页

High strength-ductility synergy in refractory multi-principal element alloys via special deformation mechanisms and dislocation behaviors 通过特殊变形机制和位错行为实现难熔多主元素合金的高强度-韧性协同效应

IF 9.6 1区材料科学

Rare Metals Pub Date : 2024-07-24 DOI: 10.1007/s12598-024-02899-z

Zhi-Wen Li, Bao-Xian Su, Liang Wang, Chen Liu, Zhe Li, Qing-Da Zhang, Bin-Bin Wang, Xiang Xue, Rui-Run Chen, Yan-Qing Su

{"title":"High strength-ductility synergy in refractory multi-principal element alloys via special deformation mechanisms and dislocation behaviors","authors":"Zhi-Wen Li, Bao-Xian Su, Liang Wang, Chen Liu, Zhe Li, Qing-Da Zhang, Bin-Bin Wang, Xiang Xue, Rui-Run Chen, Yan-Qing Su","doi":"10.1007/s12598-024-02899-z","DOIUrl":"10.1007/s12598-024-02899-z","url":null,"abstract":"<div><p>Ti-Zr–Nb refractory multi-principal element alloys (RMPEAs) have attracted increased attention due to their excellent mechanical properties. In this study, (TiZr)<sub>80-<i>x</i></sub>Nb<sub>20</sub>Mo<sub><i>x</i></sub> (<i>x</i> = 0, 5 and 10) alloys were designed, and the intrinsic conflicts between strength and ductility were overcome via composition optimization and recrystallization. The causes of the superior strength-ductility synergy were investigated in terms of their deformation mechanism and dislocation behavior. The results show that the strength improvement can be attributed to the deformation mechanism transition caused by local chemical fluctuations and lattice distortion. Specifically, the slip band widths decrease after Mo addition, and the measured slip traces in the fracture samples are associated with high-order {112} and {123} slip planes. Furthermore, the grain refinement achieved via recrystallization promotes multi-slip system activation and shortens the slip-band spacing, which reduces the stress concentration and inhibits crack source formation, thereby allowing the alloy to ensure sufficient ductility. Consequently, the Ti<sub>35</sub>Zr<sub>35</sub>Nb<sub>20</sub>Mo<sub>10</sub> alloy annealed at 900 °C exhibits high yield strength and elongation. These findings provide a new strategy for designing high-strength RMPEAs and addressing room-temperature brittleness.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 1","pages":"608 - 622"},"PeriodicalIF":9.6,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141773835","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}

引用次数: 0

Three-dimensional carbon microclusters organized by hollow carbon nanospheres for stable Li metal anodes: enabling high packing density and low tortuosity via self-assembly 用于稳定锂金属阳极的中空碳纳米球组织的三维碳微簇：通过自组装实现高堆积密度和低扭曲度

IF 9.6 1区材料科学

Rare Metals Pub Date : 2024-07-23 DOI: 10.1007/s12598-024-02931-2

Du Yeol Jo, Jae Bong Lim, Jin Koo Kim, Yun Chan Kang, Seung-Keun Park

{"title":"Three-dimensional carbon microclusters organized by hollow carbon nanospheres for stable Li metal anodes: enabling high packing density and low tortuosity via self-assembly","authors":"Du Yeol Jo, Jae Bong Lim, Jin Koo Kim, Yun Chan Kang, Seung-Keun Park","doi":"10.1007/s12598-024-02931-2","DOIUrl":"10.1007/s12598-024-02931-2","url":null,"abstract":"<div><p>Recently, hollow carbon nanospheres (HCSs) have garnered significant attention as potential Li metal hosts owing to their unique large voids and ease of fabrication. However, similar to other nanoscale hosts, their practical performance is limited by inhomogeneous agglomeration, increased binder requirements, and high tortuosity within the electrode. To overcome these problems and high tortuosity within the electrode, this study introduces a pomegranate-like carbon microcluster composed of primary HCSs (P-CMs) as a novel Li metal host. This unique nanostructure can be easily prepared using the spray-drying technique, enabling its mass production. Comprehensive analyses with various tools demonstrate that compared with HCS hosts, the P-CM host requires a smaller amount of binder to fabricate a sufficiently robust and even surface electrode. Furthermore, owing to reduced tortuosity, the well-designed P-CM electrode can provide continuous and shortened pathways for electron/ion transport, accelerating the Li-ion transfer kinetics and prohibiting preferential Li plating at the upper region of the electrode. Due to these characteristics, Li metal can be effectively encapsulated in the large inner voids of the primary HCSs constituting the P-CM, thereby enhancing the electrochemical performance of P-CM hosts in Li metal batteries. Specifically, the Coulombic efficiency of the P-CM host can be maintained at 97% over 100 cycles, with a high Li deposition areal capacity of 3 mAh·cm<sup>−2</sup> and long cycle life (1000 h, 1 mA·cm<sup>−2</sup>, and 1.0 mAh·cm<sup>−2</sup>). Furthermore, a full cell incorporating a LiFePO<sub>4</sub> cathode exhibits excellent cycle life.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 1","pages":"95 - 109"},"PeriodicalIF":9.6,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141785365","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}

引用次数: 0

Nano-lamellar Ti3Al/TiAl alloy prepared via dual-wire-fed electron beam-directed energy deposition: microstructure evolution and nanohardness enhancement 通过双线馈送电子束定向能量沉积制备的纳米层状 Ti3Al/TiAl 合金：微观结构演变和纳米硬度增强

IF 8.8 1区材料科学

Rare Metals Pub Date : 2024-07-22 DOI: 10.1007/s12598-024-02837-z

Qi Lv, Liang Wang, Chen Liu, Ying-Mei Tan, Bao-Xian Su, Bin-Bin Wang, Long-Hui Yao, Hong-Ze Fang, Liang-Shun Luo, Rui-Run Chen, Fei Yang, Yan-Qing Su

{"title":"Nano-lamellar Ti3Al/TiAl alloy prepared via dual-wire-fed electron beam-directed energy deposition: microstructure evolution and nanohardness enhancement","authors":"Qi Lv, Liang Wang, Chen Liu, Ying-Mei Tan, Bao-Xian Su, Bin-Bin Wang, Long-Hui Yao, Hong-Ze Fang, Liang-Shun Luo, Rui-Run Chen, Fei Yang, Yan-Qing Su","doi":"10.1007/s12598-024-02837-z","DOIUrl":"https://doi.org/10.1007/s12598-024-02837-z","url":null,"abstract":"<p>Nano-lamellar Ti<sub>3</sub>Al/TiAl (α<sub>2</sub>/γ) alloy with significantly improved nanohardness was prepared using dual-wire-fed electron beam-directed energy deposition (EB-DED) in this study. This investigation focused on the evolution of the colony shape and lamellar thickness of the Ti-43Al lamellar alloy at different heights. Nanoindentation tests were employed to evaluate deformation resistance, and numerical simulations provided deeper insights into the deposition process. The results indicate that the colonies are mostly columnar, except for a few equiaxed colonies at the top. Rapid cooling significantly refines the α<sub>2</sub> lamellae, resulting in an average spacing of 218 nm and thickness of 41 nm. Additionally, substantial microstrain and a nonequilibrium Al distribution lead to a significant generation of γ variants, refining the γ lamellae to 57 nm. Abundant γ/γ’ and α<sub>2</sub>/γ interfaces, along with fine α<sub>2</sub> phases, contribute to improved deformation resistance. Consequently, the nano-lamellar TiAl alloy exhibited a notable 32% increase in nanohardness (8.3 GPa) while maintaining a similar modulus (197 GPa) to conventionally prepared alloys. This study holds significant promise for advancing high-performance TiAl alloys through the dual-wire-fed EB-DED process.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"42 1","pages":""},"PeriodicalIF":8.8,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141738469","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}

引用次数: 0

Carbon nanofiber catalysts containing high-entropy metal phosphides with low-content Ru for highly efficient hydrogen evolution reaction 含高熵金属磷化物和低含量 Ru 的碳纳米纤维催化剂用于高效氢进化反应

IF 9.6 1区材料科学

Rare Metals Pub Date : 2024-07-22 DOI: 10.1007/s12598-024-02912-5

Peng Wang, Jie Zheng, Xue-Hao Li, Wen-Bo Cui, Jin-Hua Liu, Yong Wan, Jun Zhang, Yusuke Yamauchi, Zhong-Li Wang, Mang Niu, Yun-Ze Long

{"title":"Carbon nanofiber catalysts containing high-entropy metal phosphides with low-content Ru for highly efficient hydrogen evolution reaction","authors":"Peng Wang, Jie Zheng, Xue-Hao Li, Wen-Bo Cui, Jin-Hua Liu, Yong Wan, Jun Zhang, Yusuke Yamauchi, Zhong-Li Wang, Mang Niu, Yun-Ze Long","doi":"10.1007/s12598-024-02912-5","DOIUrl":"10.1007/s12598-024-02912-5","url":null,"abstract":"<div><p>High-entropy metal phosphide (HEMP) has considerable potential as an electrocatalyst owing to its beneficial properties, including high-entropy alloy synergy as well as the controllable structure and high conductivity of phosphides. Herein, electrospinning and in situ phosphating were employed to prepare three-dimensional (3D) networks of self-supporting HEMP nanofibers with varying degrees of phosphate content. Comprehensive characterizations via X-ray diffraction and X-ray photoelectron spectroscopy, as well as density functional theory calculations, demonstrate that the introduction of phosphorus (P) atoms to HEMP carbon nanofibers mediates their electronic structure, leads to lattice expansion, which in turn enhances their catalytic performance in the hydrogen evolution reaction (HER). Moreover, the formation of metal–P bonds weakens metal–metal interaction and decreases the free energy of hydrogen adsorption, contributing to the exceptional activity observed in the HEMP catalyst. Electrochemical measurements demonstrate that the HEMP-0.75 catalyst with an ultralow loading of 1.22 wt% ruthenium (Ru) exhibits the highest HER catalytic activity and stability in a 1 M KOH electrolyte, achieving a minimal overpotential of 26 mV at a current density of 10 mA·cm<sup>−2</sup> and Tafel slope of 50.9 mV·dec<sup>−1</sup>.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 1","pages":"324 - 335"},"PeriodicalIF":9.6,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141738470","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}

引用次数: 0

Novel high-entropy ultra-high temperature ceramics with enhanced ablation resistance 耐烧蚀性更强的新型高熵超高温陶瓷

IF 9.6 1区材料科学

Rare Metals Pub Date : 2024-07-22 DOI: 10.1007/s12598-024-02904-5

Pan Zhang, Xiong-Jun Liu, Guang-Yu He, Fu-Kuo Chiang, Hui Wang, Yuan Wu, Sui-He Jiang, Xiao-Bin Zhang, Zhao-Ping Lu

{"title":"Novel high-entropy ultra-high temperature ceramics with enhanced ablation resistance","authors":"Pan Zhang, Xiong-Jun Liu, Guang-Yu He, Fu-Kuo Chiang, Hui Wang, Yuan Wu, Sui-He Jiang, Xiao-Bin Zhang, Zhao-Ping Lu","doi":"10.1007/s12598-024-02904-5","DOIUrl":"10.1007/s12598-024-02904-5","url":null,"abstract":"<div><p>Ultra-high temperature ceramics (UHTCs) offer great potential for applications in extreme service environments, such as hypersonic vehicles, rockets and re-entry spacecraft. However, the severe ablation caused by high-speed heat flow scouring and high-temperature oxidation limits the engineering application of UHTCs. In this work, we report a novel high-entropy UHTC (Ti<sub>0.2</sub>Zr<sub>0.2</sub>V<sub>0.2</sub>Nb<sub>0.2</sub>Cr<sub>0.2</sub>)(C<sub>0.5</sub>N<sub>0.5</sub>), which exhibits superior ablation resistance and light weight compared with traditional UHTCs. Specifically, at a temperature of 2650 K, the mass ablation rate of the material was measured as 1.025 × 10<sup>−2</sup> g·s<sup>−1</sup>, and the density was calculated to be 6.7 g·cm<sup>−3</sup>. The impressive ablation resistance of (Ti<sub>0.2</sub>Zr<sub>0.2</sub>V<sub>0.2</sub>Nb<sub>0.2</sub>Cr<sub>0.2</sub>)(C<sub>0.5</sub>N<sub>0.5</sub>) is attributed to the incorporation of a self-healing mechanism, which is associated with the in-situ formation of a medium-entropy oxide (TiVCr)O<sub>2</sub> during the ablation process. The medium-entropy oxide can seal pores and cracks to retard oxygen diffusion and prevent the material from fragmentation, thereby resulting in outstanding ablation resistance.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"43 12","pages":"6559 - 6570"},"PeriodicalIF":9.6,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141738475","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}

引用次数: 0

Electronic modulation and dual-defect construction of NiMoP/Ni2P heterointerfaces for sustainable oxygen evolution reaction 用于可持续氧进化反应的 NiMoP/Ni2P 异质界面的电子调制和双缺陷构建

IF 9.6 1区材料科学

Rare Metals Pub Date : 2024-07-22 DOI: 10.1007/s12598-024-02784-9

Qing-Qing Zhang, Yan-Na Xu, De-Rong Duan, Heng-Jun Su, Tao Wang, Xiao-Jun Zeng

{"title":"Electronic modulation and dual-defect construction of NiMoP/Ni2P heterointerfaces for sustainable oxygen evolution reaction","authors":"Qing-Qing Zhang, Yan-Na Xu, De-Rong Duan, Heng-Jun Su, Tao Wang, Xiao-Jun Zeng","doi":"10.1007/s12598-024-02784-9","DOIUrl":"10.1007/s12598-024-02784-9","url":null,"abstract":"<div><p>The existence of multiple vacancies leads to significant changes in the local atomic structure, which can regulate the electronic structure of the surface and form unsaturated coordination geometries. However, the current methods employed to generate multiple vacancies in two-dimensional (2D) layered double hydroxide (LDH) materials are still difficult to achieve to some extent and are primarily limited to monolayer LDH structures. Here, we present an improved method to synthesize NiMoP/Ni<sub>2</sub>P catalysts with a sponge-like porous structure. Firstly, NiO with dual defects was constructed by subjecting NiMo-LDH/Ni to air calcination. Subsequently, we performed phosphorization treatment and introduced multiple Ni vacancies and O vacancies as defect sites to tune the edge and substrate surfaces of LDH. At the same time, the electronic structure was tuned by adding P heteroatoms. The synergistic effect of porous structure, heterogeneous interfaces, vacancies, doping defects, and amorphous states can greatly enhance the electron transfer effect inside the catalysts, which significantly improves the catalytic ability of the oxygen evolution reaction (OER). Therefore, the overpotential for the oxygen evolution reaction of NiMoP/Ni<sub>2</sub>P heterointerfaces reaches 270 mV at a current density of 10 mA·cm<sup>−2</sup> under alkaline conditions, with the catalysts capable of sustaining high current densities even after the durability testing for 35 h.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 1","pages":"311 - 323"},"PeriodicalIF":9.6,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141738476","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}

引用次数: 0

Electrochemically activated metal oxide sites at Rh–Ni2P electrocatalyst for efficient alkaline hydrogen evolution reaction 电化学活化的 Rh-Ni2P 电催化剂金属氧化物位点用于高效碱性氢进化反应

IF 9.6 1区材料科学

Rare Metals Pub Date : 2024-07-22 DOI: 10.1007/s12598-024-02903-6

Cheng Peng, Jia-Yi Li, Luo-Xiang Shi, Ming-Yue Wang, Wen-Hai Wang, Tao Cheng, Pei-Zhi Yang, Hao Yang, Kong-Lin Wu

{"title":"Electrochemically activated metal oxide sites at Rh–Ni2P electrocatalyst for efficient alkaline hydrogen evolution reaction","authors":"Cheng Peng, Jia-Yi Li, Luo-Xiang Shi, Ming-Yue Wang, Wen-Hai Wang, Tao Cheng, Pei-Zhi Yang, Hao Yang, Kong-Lin Wu","doi":"10.1007/s12598-024-02903-6","DOIUrl":"10.1007/s12598-024-02903-6","url":null,"abstract":"<div><p>Highly efficient hydrogen evolution reaction (HER) electrocatalysts play a crucial part in generating green hydrogen. Herein, an electrochemical activation approach was applied to design 6.7 Rh–Ni<sub>2</sub>P-800CV electrocatalysts in alkaline electrolytes. The results confirm that the generation of metal oxide sites through the electrochemical activation strategy can effectively improve the intrinsic activity of 6.7 Rh–Ni<sub>2</sub>P-800CV. The density functional calculations further confirm that metal oxide active sites are favorable for H<sub>2</sub>O adsorption and activation and H* adsorption/desorption. The 6.7 Rh–Ni<sub>2</sub>P-800CV possesses significantly enhanced HER performance with low overpotential (25 mV at 10 mA·cm<sup>−2</sup>), small Tafel (60 mV·dec<sup>−1</sup>) and robust stability in 1.0 M KOH, outperforming Pt/C and 6.7 Rh–Ni<sub>2</sub>P counterparts. Meanwhile, 6.7 Rh–Ni<sub>2</sub>P-800CV can even operate at a large current density (550 mA·cm<sup>−2</sup>) up to 90 h with an overpotential of 320 mV, which meets the requirements of industrial water splitting. What’s more, the overall water-splitting systems (6.7 Rh–Ni<sub>2</sub>P-800CV || 6.7 Rh–Ni<sub>2</sub>P-800CV) can be directly driven by the solar cell. This work highlights that electrochemical activation technology provides a robust avenue toward constructing efficient electrocatalysts for sustainable energy conversion.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"43 12","pages":"6416 - 6425"},"PeriodicalIF":9.6,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141738478","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}

引用次数: 0

A novel Au(III) agent designed to inhibit tumor growth and metastasis through inducing immunogenic cell death 通过诱导免疫性细胞死亡抑制肿瘤生长和转移的新型金（III）制剂

IF 9.6 1区材料科学

Rare Metals Pub Date : 2024-07-22 DOI: 10.1007/s12598-024-02871-x

Wen-Juan Li, Shan-He Li, Xue-Yu Man, Gang Xu, Zhen-Lei Zhang, Yao Zhang, Hong Liang, Feng Yang

引用次数: 0

Structure deformation of Ni–Fe–Se enables efficient oxygen evolution via RE atoms doping Ni-Fe-Se 的结构变形可通过掺杂 RE 原子实现高效氧进化

IF 9.6 1区材料科学

Rare Metals Pub Date : 2024-07-22 DOI: 10.1007/s12598-024-02900-9

Hong-Rui Zhao, Cheng-Zong Yuan, Cong-Hui Li, Wen-Kai Zhao, Fu-Ling Wu, Lei Xin, Hong Yin, Shu-Feng Ye, Xiao-Meng Zhang, Yun-Fa Chen

{"title":"Structure deformation of Ni–Fe–Se enables efficient oxygen evolution via RE atoms doping","authors":"Hong-Rui Zhao, Cheng-Zong Yuan, Cong-Hui Li, Wen-Kai Zhao, Fu-Ling Wu, Lei Xin, Hong Yin, Shu-Feng Ye, Xiao-Meng Zhang, Yun-Fa Chen","doi":"10.1007/s12598-024-02900-9","DOIUrl":"10.1007/s12598-024-02900-9","url":null,"abstract":"<div><p>The development of cost-effective and highly stable electrocatalysts for oxygen evolution reactions holds paramount importance in practical hydrogen production. Herein, we present a novel self-supported electrode comprising Ce-doped Ni–Fe–Se nanosheets grown on carbon cloth (Ni–Fe–Ce–Se/CC). This electrode was synthesized through a selenylation process, utilizing Ni–Fe-Ce-layered double hydroxide/carbon cloth (Ni–Fe–Ce LDH/CC) as the precursor. Notably, Ni–Fe–Ce–Se/CC electrode demonstrates remarkable performance, requiring a low overpotential of 300 mV to attain a current density of 100 mA· cm<sup>−2</sup> under harsh alkaline conditions. Furthermore, the electrode exhibits exceptional stability during continuous operation for 100 h. Insight into the underlying mechanisms was gained through a combination of experimental results and density functional theory calculations. Our findings reveal that Ce doping induces crystal structure deformation in Ni–Fe–Se and enhances electron enrichment around Ni atoms. This structural modification optimizes the adsorption energy of oxygen-based intermediates on the Ni–Fe–Se surface. This work offers a valuable strategy for regulating the electron transfer and adsorption capabilities of transition metal selenide electrocatalysts through RE atoms doping, opening new avenues for enhanced electrocatalytic performance.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 1","pages":"336 - 348"},"PeriodicalIF":9.6,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141738471","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}

引用次数: 0

Low-temperature induced crystallographic orientation boosting Li storage performance of Na2MoO4·2H2O 低温诱导结晶取向提高 Na2MoO4-2H2O 的锂储存性能

IF 9.6 1区材料科学

Rare Metals Pub Date : 2024-07-22 DOI: 10.1007/s12598-024-02905-4

Jia-Qi Ma, Yan-Li Chen, Qiong Peng, Yun-Peng Qu, Jun-Fei Ding, Xiu Gong, Jing-Liang Yang, Xiao-Si Qi, Yun-Lei Zhou

{"title":"Low-temperature induced crystallographic orientation boosting Li storage performance of Na2MoO4·2H2O","authors":"Jia-Qi Ma, Yan-Li Chen, Qiong Peng, Yun-Peng Qu, Jun-Fei Ding, Xiu Gong, Jing-Liang Yang, Xiao-Si Qi, Yun-Lei Zhou","doi":"10.1007/s12598-024-02905-4","DOIUrl":"10.1007/s12598-024-02905-4","url":null,"abstract":"<div><p>The design and development of high-performance anodes pose significant challenges in the construction of next-generation rechargeable lithium-ion batteries (LIBs). Sodium molybdate dihydrate (Na<sub>2</sub>MoO<sub>4</sub>·2H<sub>2</sub>O) has garnered increasing attention due to its cost-effectiveness, non-toxicity and earth abundance. To enhance the Li storage performance of Na<sub>2</sub>MoO<sub>4</sub>·2H<sub>2</sub>O, a crystallographic orientation regulation strategy is proposed in this work. Initially, density functional theory calculations are carried out to demonstrate that the (020) crystal plane of Na<sub>2</sub>MoO<sub>4</sub>·2H<sub>2</sub>O offers the lowest energy barrier for Li<sup>+</sup> migration. Subsequently, the preferred crystallographic orientation of Na<sub>2</sub>MoO<sub>4</sub>·2H<sub>2</sub>O crystal is tuned through a low-temperature recrystallization method. Furthermore, the microstructure and phase changes of Na<sub>2</sub>MoO<sub>4</sub>·2H<sub>2</sub>O during the lithiation/de-lithiation process are studied using in situ and ex situ XRD tests, ex situ XPS and cyclic voltammetry to unravel its Li<sup>+</sup> storage mechanism. Upon application as LIBs anode, the Na<sub>2</sub>MoO<sub>4</sub>·2H<sub>2</sub>O single-crystal particles with a preferred (020) surface exhibit superior reversible capacity, high-capacity retention and high cycling stability. The enhanced Li storage performance should be attributed to the regulated crystallographic orientation and small changes in the crystal microstructure during the charge/discharge process, which facilitates Li<sup>+</sup> migration and bolsters structural stability. Notably, this study introduces a novel concept and a simple synthesis method for the advancement of electrodes in rechargeable batteries.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 1","pages":"135 - 146"},"PeriodicalIF":9.6,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141738472","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}

引用次数: 0