{"title":"开发用于在水浴环境中高密度储氢的 Ti-V-Cr-Mn-Mo-Ce 高熵合金","authors":"Hua-Zhou Hu, Hou-Qun Xiao, Xin-Cong He, Wen-Hao Zhou, Xiao-Xuan Zhang, Rui-Zhu Tang, Jie Li, Chuan-Ming Ma, Qing-Jun Chen","doi":"10.1007/s12598-024-02618-8","DOIUrl":null,"url":null,"abstract":"<p>The V-based body-centered cubic (BCC)-type hydrogen storage alloys have attracted significant attention due to their high theoretical hydrogen storage capacity of 3.80 wt%. However, their practical application faces challenges related to low dehydriding capacity and poor activation performance. To overcome these challenges, a BCC-type Ti–V–Cr–Mn–Mo–Ce high-entropy alloy (HEA) with an effectively dehydriding capacity of 2.5 wt% above 0.1 MPa was prepared. By introduction of Mo and conducting heat treatment, the precipitation of Ti-rich phase in HEA was successfully suppressed, resulting in improved compositional uniformity and dehydriding capacity. Consequently, the effective dehydriding capacity increased significantly from 0.60 wt% to 2.50 wt% at 65 °C, surpassing that of other types of hydrogen storage alloys under the same conditions. Moreover, the addition of 1 wt% Ce enabled initial hydrogen absorption at 25 °C without the need for activation at 400 °C. Furthermore, Ce doping reduced the dehydriding activation energy of the Ti–V–Cr–Mn–Mo–Ce HEA from 52.71 to 42.82 kJ·mol<sup>−1</sup>. Additionally, the enthalpy value of dehydrogenation decreased from 46.89 to 17.96 kJ·mol<sup>−1</sup>, attributed to a decrease in the hysteresis factor from 0.68 to 0.52. These findings provide valuable insights for optimizing the hydrogen storage property of HEA.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\n","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":null,"pages":null},"PeriodicalIF":9.6000,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Development of Ti–V–Cr–Mn–Mo–Ce high-entropy alloys for high-density hydrogen storage in water bath environments\",\"authors\":\"Hua-Zhou Hu, Hou-Qun Xiao, Xin-Cong He, Wen-Hao Zhou, Xiao-Xuan Zhang, Rui-Zhu Tang, Jie Li, Chuan-Ming Ma, Qing-Jun Chen\",\"doi\":\"10.1007/s12598-024-02618-8\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The V-based body-centered cubic (BCC)-type hydrogen storage alloys have attracted significant attention due to their high theoretical hydrogen storage capacity of 3.80 wt%. However, their practical application faces challenges related to low dehydriding capacity and poor activation performance. To overcome these challenges, a BCC-type Ti–V–Cr–Mn–Mo–Ce high-entropy alloy (HEA) with an effectively dehydriding capacity of 2.5 wt% above 0.1 MPa was prepared. By introduction of Mo and conducting heat treatment, the precipitation of Ti-rich phase in HEA was successfully suppressed, resulting in improved compositional uniformity and dehydriding capacity. Consequently, the effective dehydriding capacity increased significantly from 0.60 wt% to 2.50 wt% at 65 °C, surpassing that of other types of hydrogen storage alloys under the same conditions. Moreover, the addition of 1 wt% Ce enabled initial hydrogen absorption at 25 °C without the need for activation at 400 °C. Furthermore, Ce doping reduced the dehydriding activation energy of the Ti–V–Cr–Mn–Mo–Ce HEA from 52.71 to 42.82 kJ·mol<sup>−1</sup>. Additionally, the enthalpy value of dehydrogenation decreased from 46.89 to 17.96 kJ·mol<sup>−1</sup>, attributed to a decrease in the hysteresis factor from 0.68 to 0.52. These findings provide valuable insights for optimizing the hydrogen storage property of HEA.</p><h3 data-test=\\\"abstract-sub-heading\\\">Graphical Abstract</h3>\\n\",\"PeriodicalId\":749,\"journal\":{\"name\":\"Rare Metals\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":9.6000,\"publicationDate\":\"2024-06-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Rare Metals\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1007/s12598-024-02618-8\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Rare Metals","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s12598-024-02618-8","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
摘要
V 基体心立方(BCC)型储氢合金的理论储氢能力高达 3.80 wt%,因而备受关注。然而,它们的实际应用面临着脱水能力低和活化性能差的挑战。为了克服这些挑战,制备了一种 BCC 型 Ti-V-Cr-Mn-Mo-Ce 高熵合金(HEA),在 0.1 MPa 以上的有效脱水能力为 2.5 wt%。通过引入 Mo 和进行热处理,成功抑制了 HEA 中富钛相的析出,从而改善了成分均匀性和脱水能力。因此,在 65 °C 时,有效脱水能力从 0.60 wt% 显著提高到 2.50 wt%,超过了相同条件下其他类型的储氢合金。此外,添加 1 wt% Ce 后,无需在 400 °C 下活化,即可在 25 °C 下初步吸收氢气。此外,掺杂 Ce 使 Ti-V-Cr-Mn-Mo-Ce HEA 的脱水活化能从 52.71 kJ-mol-1 降至 42.82 kJ-mol-1。此外,脱氢焓值从 46.89 kJ-mol-1 降至 17.96 kJ-mol-1,这归因于滞后因子从 0.68 降至 0.52。这些发现为优化 HEA 的储氢特性提供了宝贵的见解。
Development of Ti–V–Cr–Mn–Mo–Ce high-entropy alloys for high-density hydrogen storage in water bath environments
The V-based body-centered cubic (BCC)-type hydrogen storage alloys have attracted significant attention due to their high theoretical hydrogen storage capacity of 3.80 wt%. However, their practical application faces challenges related to low dehydriding capacity and poor activation performance. To overcome these challenges, a BCC-type Ti–V–Cr–Mn–Mo–Ce high-entropy alloy (HEA) with an effectively dehydriding capacity of 2.5 wt% above 0.1 MPa was prepared. By introduction of Mo and conducting heat treatment, the precipitation of Ti-rich phase in HEA was successfully suppressed, resulting in improved compositional uniformity and dehydriding capacity. Consequently, the effective dehydriding capacity increased significantly from 0.60 wt% to 2.50 wt% at 65 °C, surpassing that of other types of hydrogen storage alloys under the same conditions. Moreover, the addition of 1 wt% Ce enabled initial hydrogen absorption at 25 °C without the need for activation at 400 °C. Furthermore, Ce doping reduced the dehydriding activation energy of the Ti–V–Cr–Mn–Mo–Ce HEA from 52.71 to 42.82 kJ·mol−1. Additionally, the enthalpy value of dehydrogenation decreased from 46.89 to 17.96 kJ·mol−1, attributed to a decrease in the hysteresis factor from 0.68 to 0.52. These findings provide valuable insights for optimizing the hydrogen storage property of HEA.
期刊介绍:
Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.