Yuhan Ji , Tong Wang , Xu Yao , Jingkui Gao , Yanting Chu , Jingwen Sun , Haitao Dong , Jingquan Sha
{"title":"Regulating microstructure in agar-derived N-doped hard carbon towards enhanced sodium ion storage","authors":"Yuhan Ji , Tong Wang , Xu Yao , Jingkui Gao , Yanting Chu , Jingwen Sun , Haitao Dong , Jingquan Sha","doi":"10.1016/j.est.2024.114640","DOIUrl":null,"url":null,"abstract":"<div><div>Hard carbon (HC) with larger interlayer spacing, lower operation potential and stable skeleton is a promising kind of anode materials for sodium-ion batteries (SIBs), where heteroatom doping and structural design have been proved to be effective strategies to improve its Na<sup>+</sup> storage performance. Herein, biomass agar-derived N-doped porous carbon (NPC-Ts, <em>T</em> = 750, 900 and 1050 °C) were successfully fabricated by modulating carbonization temperature, where interlayer spacing, specifical surface area (SSA), micro/mesopore amount and N-doping levels and configurations (pyridinic N (N-6), pyrrolic N (N-5) and graphite N (N-Q)) were explored in detail. Among the NPC-900 shows the largest interlayer spacing (0.412 nm), SSA (3991 m<sup>2</sup>/g) and sum percentage of N-6 and N-5 (76.7 %). When applied as anode material for SIBs, NPC-900 exhibits the highly reversible capacity (430.9 mAh/g at 100 mA/g after 100 cycles) and excellent rate capability (162 mAh/g at 5000 mA/g) and outstanding cycle life (242.6 mAh/g at 1000 mA/g after 5000 cycles). More importantly, when coupled with Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> (NVP) cathode, the Na<sup>+</sup> full cell displays the highest practical energy density of 267 Wh/kg to date, to the best our knowledge, revealing its potential practical sodium storage applications.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"106 ","pages":"Article 114640"},"PeriodicalIF":8.9000,"publicationDate":"2024-11-29","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/S2352152X24042269","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
Abstract
Hard carbon (HC) with larger interlayer spacing, lower operation potential and stable skeleton is a promising kind of anode materials for sodium-ion batteries (SIBs), where heteroatom doping and structural design have been proved to be effective strategies to improve its Na+ storage performance. Herein, biomass agar-derived N-doped porous carbon (NPC-Ts, T = 750, 900 and 1050 °C) were successfully fabricated by modulating carbonization temperature, where interlayer spacing, specifical surface area (SSA), micro/mesopore amount and N-doping levels and configurations (pyridinic N (N-6), pyrrolic N (N-5) and graphite N (N-Q)) were explored in detail. Among the NPC-900 shows the largest interlayer spacing (0.412 nm), SSA (3991 m2/g) and sum percentage of N-6 and N-5 (76.7 %). When applied as anode material for SIBs, NPC-900 exhibits the highly reversible capacity (430.9 mAh/g at 100 mA/g after 100 cycles) and excellent rate capability (162 mAh/g at 5000 mA/g) and outstanding cycle life (242.6 mAh/g at 1000 mA/g after 5000 cycles). More importantly, when coupled with Na3V2(PO4)3 (NVP) cathode, the Na+ full cell displays the highest practical energy density of 267 Wh/kg to date, to the best our knowledge, revealing its potential practical sodium storage applications.
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.