{"title":"原位构建嵌入掺杂 N 的碳三维互连网络中的(镍钴)3Se4 纳米磁珠,用于增强钠储存。","authors":"Xiaoya Zhou, Xin Huang, Shufan He, Yezi Lu, Xiao Shen, Shaochun Tang","doi":"10.1021/acs.inorgchem.4c02052","DOIUrl":null,"url":null,"abstract":"<p><p>Transition metal selenides, boasting remarkable specific capacity, have emerged as a promising electrode material. However, the substantial volume fluctuations during sodium ion insertion and extraction result in inadequate cyclic stability and rate performance, impeding their practical utility. Here, we synthesized N-doped carbon three-dimensional (3D) interconnected networks encapsulating (NiCo)<sub>3</sub>Se<sub>4</sub> nanoparticles, denoted as ((NiCo)<sub>3</sub>Se<sub>4</sub>/N-C), exhibiting a bead-like structure and carbon confinement through electrospinning and subsequent thermal treatment. The N-doped carbon 3D interconnected networks possess high porosity and ample volume buffering capacity, enhance conductivity, shorten ion diffusion paths, and mitigate mechanical stress induced by volume changes during cycling. The uniformly distributed (NiCo)<sub>3</sub>Se<sub>4</sub> nanoparticles, featuring a stable structure, demonstrate rapid electrochemical kinetics and numerous available active sites. The distinctive structure and composition of the optimized (NiCo)<sub>3</sub>Se<sub>4</sub>/N-C material showcase a high specific capacity (656.2 mAh g<sup>-1</sup> at 0.1 A g<sup>-1</sup>) and an outstanding rate capability. A kinetic analysis confirms that (NiCo)<sub>3</sub>Se<sub>4</sub>/N-C stimulates the pseudocapacitive Na<sup>+</sup> storage mechanism with capacitance contributing up to 89.2% of the total capacity. This unique structure design and doping approach provide new insights into the design of electrode materials for high-performance batteries.</p>","PeriodicalId":40,"journal":{"name":"Inorganic Chemistry","volume":null,"pages":null},"PeriodicalIF":4.3000,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"In Situ Construction of (NiCo)<sub>3</sub>Se<sub>4</sub> Nanobeads Embedded in N-Doped Carbon 3D Interconnected Networks for Enhanced Sodium Storage.\",\"authors\":\"Xiaoya Zhou, Xin Huang, Shufan He, Yezi Lu, Xiao Shen, Shaochun Tang\",\"doi\":\"10.1021/acs.inorgchem.4c02052\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Transition metal selenides, boasting remarkable specific capacity, have emerged as a promising electrode material. However, the substantial volume fluctuations during sodium ion insertion and extraction result in inadequate cyclic stability and rate performance, impeding their practical utility. Here, we synthesized N-doped carbon three-dimensional (3D) interconnected networks encapsulating (NiCo)<sub>3</sub>Se<sub>4</sub> nanoparticles, denoted as ((NiCo)<sub>3</sub>Se<sub>4</sub>/N-C), exhibiting a bead-like structure and carbon confinement through electrospinning and subsequent thermal treatment. The N-doped carbon 3D interconnected networks possess high porosity and ample volume buffering capacity, enhance conductivity, shorten ion diffusion paths, and mitigate mechanical stress induced by volume changes during cycling. The uniformly distributed (NiCo)<sub>3</sub>Se<sub>4</sub> nanoparticles, featuring a stable structure, demonstrate rapid electrochemical kinetics and numerous available active sites. The distinctive structure and composition of the optimized (NiCo)<sub>3</sub>Se<sub>4</sub>/N-C material showcase a high specific capacity (656.2 mAh g<sup>-1</sup> at 0.1 A g<sup>-1</sup>) and an outstanding rate capability. A kinetic analysis confirms that (NiCo)<sub>3</sub>Se<sub>4</sub>/N-C stimulates the pseudocapacitive Na<sup>+</sup> storage mechanism with capacitance contributing up to 89.2% of the total capacity. This unique structure design and doping approach provide new insights into the design of electrode materials for high-performance batteries.</p>\",\"PeriodicalId\":40,\"journal\":{\"name\":\"Inorganic Chemistry\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.3000,\"publicationDate\":\"2024-08-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Inorganic Chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://doi.org/10.1021/acs.inorgchem.4c02052\",\"RegionNum\":2,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2024/8/1 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, INORGANIC & NUCLEAR\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Inorganic Chemistry","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1021/acs.inorgchem.4c02052","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/8/1 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
摘要
过渡金属硒化物具有显著的比容量,已成为一种很有前途的电极材料。然而,钠离子插入和萃取过程中产生的巨大体积波动导致其循环稳定性和速率性能不足,阻碍了其实际应用。在这里,我们通过电纺丝和随后的热处理合成了掺杂 N 的碳三维互连网络,该网络包裹着 (NiCo)3Se4 纳米粒子,称为 ((NiCo)3Se4/N-C),呈现出珠状结构和碳约束。掺杂 N 的碳三维互连网络具有高孔隙率和充足的体积缓冲能力,可增强导电性、缩短离子扩散路径并缓解循环过程中体积变化引起的机械应力。均匀分布的 (NiCo)3Se4 纳米粒子结构稳定,具有快速的电化学动力学和大量可用的活性位点。优化后的(镍钴)3Se4/N-C 材料具有独特的结构和组成,显示出较高的比容量(0.1 A g-1 时为 656.2 mAh g-1)和出色的速率能力。动力学分析证实,(NiCo)3Se4/N-C 激发了伪电容性 Na+ 储存机制,电容占总容量的 89.2%。这种独特的结构设计和掺杂方法为高性能电池电极材料的设计提供了新的思路。
In Situ Construction of (NiCo)3Se4 Nanobeads Embedded in N-Doped Carbon 3D Interconnected Networks for Enhanced Sodium Storage.
Transition metal selenides, boasting remarkable specific capacity, have emerged as a promising electrode material. However, the substantial volume fluctuations during sodium ion insertion and extraction result in inadequate cyclic stability and rate performance, impeding their practical utility. Here, we synthesized N-doped carbon three-dimensional (3D) interconnected networks encapsulating (NiCo)3Se4 nanoparticles, denoted as ((NiCo)3Se4/N-C), exhibiting a bead-like structure and carbon confinement through electrospinning and subsequent thermal treatment. The N-doped carbon 3D interconnected networks possess high porosity and ample volume buffering capacity, enhance conductivity, shorten ion diffusion paths, and mitigate mechanical stress induced by volume changes during cycling. The uniformly distributed (NiCo)3Se4 nanoparticles, featuring a stable structure, demonstrate rapid electrochemical kinetics and numerous available active sites. The distinctive structure and composition of the optimized (NiCo)3Se4/N-C material showcase a high specific capacity (656.2 mAh g-1 at 0.1 A g-1) and an outstanding rate capability. A kinetic analysis confirms that (NiCo)3Se4/N-C stimulates the pseudocapacitive Na+ storage mechanism with capacitance contributing up to 89.2% of the total capacity. This unique structure design and doping approach provide new insights into the design of electrode materials for high-performance batteries.
期刊介绍:
Inorganic Chemistry publishes fundamental studies in all phases of inorganic chemistry. Coverage includes experimental and theoretical reports on quantitative studies of structure and thermodynamics, kinetics, mechanisms of inorganic reactions, bioinorganic chemistry, and relevant aspects of organometallic chemistry, solid-state phenomena, and chemical bonding theory. Emphasis is placed on the synthesis, structure, thermodynamics, reactivity, spectroscopy, and bonding properties of significant new and known compounds.