{"title":"纳米氧化锂(Li3VO4)颗粒/多孔掺杂 N 的纳米碳纤维的快速锂存储动力学","authors":"","doi":"10.1016/j.est.2024.114193","DOIUrl":null,"url":null,"abstract":"<div><div>Li<sub>3</sub>VO<sub>4</sub> (LVO) has been recognized as an alternative anode material for lithium-ion batteries (LIBs) because of its appropriate lithium storage potential and capacity merits. However, its practical application is seriously hindered by slow reaction kinetics stemming from poor electronic conductivity. Herein, Li<sub>3</sub>VO<sub>4</sub>/porous N-doped carbon nanofibers (LVO/PNC NFs) are firstly designed and fabricated <em>via</em> an electrospinning method, utilizing the thermal decomposition characteristics of polylactic acid (PLA). The porous N-doped carbon nanofibers provide efficient electrolyte diffusion paths and facilitate ion transport. In addition, LVO nanoparticles are uniformly dispersed along the nanofibers to effectively inhibit particle aggregation. The obtained LVO/PNC NFs are evaluated as anodes for LIBs and deliver high reversible capacity of 768 mAh g<sup>−1</sup> after 300 cycles at 0.2 A g<sup>−1</sup>, along with excellent rate capability (average capacity of 355 mAh g<sup>−1</sup> at 8 A g<sup>−1</sup> after 6 periodic rate testing) and long cycling life (286 mAh g<sup>−1</sup> after 2000 cycles at 4 A g<sup>−1</sup>). The special porous nanofiber represents an effective strategy for improving the electronic conductivity, inhibiting particle aggregation, and ensuring rapid ion/charge transport towards advanced energy storage technologies.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":null,"pages":null},"PeriodicalIF":8.9000,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Fast kinetics for lithium storage rendered by Li3VO4 nanoparticles/porous N-doped carbon nanofibers\",\"authors\":\"\",\"doi\":\"10.1016/j.est.2024.114193\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Li<sub>3</sub>VO<sub>4</sub> (LVO) has been recognized as an alternative anode material for lithium-ion batteries (LIBs) because of its appropriate lithium storage potential and capacity merits. However, its practical application is seriously hindered by slow reaction kinetics stemming from poor electronic conductivity. Herein, Li<sub>3</sub>VO<sub>4</sub>/porous N-doped carbon nanofibers (LVO/PNC NFs) are firstly designed and fabricated <em>via</em> an electrospinning method, utilizing the thermal decomposition characteristics of polylactic acid (PLA). The porous N-doped carbon nanofibers provide efficient electrolyte diffusion paths and facilitate ion transport. In addition, LVO nanoparticles are uniformly dispersed along the nanofibers to effectively inhibit particle aggregation. The obtained LVO/PNC NFs are evaluated as anodes for LIBs and deliver high reversible capacity of 768 mAh g<sup>−1</sup> after 300 cycles at 0.2 A g<sup>−1</sup>, along with excellent rate capability (average capacity of 355 mAh g<sup>−1</sup> at 8 A g<sup>−1</sup> after 6 periodic rate testing) and long cycling life (286 mAh g<sup>−1</sup> after 2000 cycles at 4 A g<sup>−1</sup>). The special porous nanofiber represents an effective strategy for improving the electronic conductivity, inhibiting particle aggregation, and ensuring rapid ion/charge transport towards advanced energy storage technologies.</div></div>\",\"PeriodicalId\":15942,\"journal\":{\"name\":\"Journal of energy storage\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":8.9000,\"publicationDate\":\"2024-10-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of energy storage\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2352152X24037794\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENERGY & FUELS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of energy storage","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2352152X24037794","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0
摘要
Li3VO4(LVO)具有适当的锂储存潜力和容量优势,已被公认为锂离子电池(LIB)的替代负极材料。然而,由于电子传导性差,反应动力学缓慢,严重阻碍了其实际应用。本文首先利用聚乳酸(PLA)的热分解特性,通过电纺丝方法设计并制备了 Li3VO4/多孔 N 掺杂碳纳米纤维(LVO/PNC NFs)。多孔的 N 掺杂碳纳米纤维提供了有效的电解质扩散路径,促进了离子传输。此外,LVO 纳米粒子沿纳米纤维均匀分散,有效抑制了粒子聚集。所获得的 LVO/PNC NF 被评估为 LIB 的阳极,在 0.2 A g-1 的条件下循环 300 次后,可提供 768 mAh g-1 的高可逆容量,同时还具有出色的速率能力(在 8 A g-1 的条件下循环 6 次后,平均容量为 355 mAh g-1)和长循环寿命(在 4 A g-1 的条件下循环 2000 次后,平均容量为 286 mAh g-1)。这种特殊的多孔纳米纤维是提高电子导电性、抑制颗粒聚集和确保离子/电荷快速传输的有效策略,可用于先进的储能技术。
Fast kinetics for lithium storage rendered by Li3VO4 nanoparticles/porous N-doped carbon nanofibers
Li3VO4 (LVO) has been recognized as an alternative anode material for lithium-ion batteries (LIBs) because of its appropriate lithium storage potential and capacity merits. However, its practical application is seriously hindered by slow reaction kinetics stemming from poor electronic conductivity. Herein, Li3VO4/porous N-doped carbon nanofibers (LVO/PNC NFs) are firstly designed and fabricated via an electrospinning method, utilizing the thermal decomposition characteristics of polylactic acid (PLA). The porous N-doped carbon nanofibers provide efficient electrolyte diffusion paths and facilitate ion transport. In addition, LVO nanoparticles are uniformly dispersed along the nanofibers to effectively inhibit particle aggregation. The obtained LVO/PNC NFs are evaluated as anodes for LIBs and deliver high reversible capacity of 768 mAh g−1 after 300 cycles at 0.2 A g−1, along with excellent rate capability (average capacity of 355 mAh g−1 at 8 A g−1 after 6 periodic rate testing) and long cycling life (286 mAh g−1 after 2000 cycles at 4 A g−1). The special porous nanofiber represents an effective strategy for improving the electronic conductivity, inhibiting particle aggregation, and ensuring rapid ion/charge transport towards advanced energy storage technologies.
期刊介绍:
Journal of energy storage focusses on all aspects of energy storage, in particular systems integration, electric grid integration, modelling and analysis, novel energy storage technologies, sizing and management strategies, business models for operation of storage systems and energy storage developments worldwide.