Waste hemp hurd as a sustainable precursor for affordable and high-rate hard carbon-based anodes in sodium-ion batteries

Antorán, D. (Universidad de Zaragoza) ; Alvira, D. (Universidad de Zaragoza) ; Peker, M. E. ; Malón, H. (Universidad de Zaragoza) ; Irusta, S. (Universidad de Zaragoza) ; Sebastián, V. (Universidad de Zaragoza) ; Manyà, J. J. (Universidad de Zaragoza)

Resumen: The present study reports the promising potential of waste hemp-hurd-derived carbons as anodes in sodium-ion batteries (SIBs). Carbons were produced through an easily scalable process consisting of pyrolysis of raw biomass at 500 °C followed by mild chemical activation of the resulting char through wet impregnation with K2CO3 and subsequent heating of the solid phase (after filtration and drying) up to 700 or 800 °C under nitrogen. The best electrochemical performance was observed for the hard carbon activated at a char-K2CO3 mass ratio of 1:4 and heated up to 800 °C, which exhibited an excellent initial coulombic efficiency (73%) and achieved reversible charge capacities of 267 and 79 mAh g–1 at 0.03 and 1 A g–1, respectively. This material also exhibited an impressive cyclic stability and rate capability, with a capacity retention of 96% after 300 cycles at a current density of 2 A g–1. This more than satisfactory performance could be related to the textural and structural features of the hard carbon, which include moderate interconnected microporosity (with pore sizes below 1 nm), an appropriate concentration of defects in the carbon structure, relatively large interplanar distances, and a certain number of closed pores.

Idioma: Inglés

DOI: 10.1021/acs.energyfuels.3c01040

Año: 2023

Publicado en: Energy and Fuels 37, 13 (2023), 9650-9661
ISSN: 0887-0624

Factor impacto JCR: 5.2 (2023)

Categ. JCR: ENGINEERING, CHEMICAL rank: 35 / 170 = 0.206 (2023) - Q1 - T1
Categ. JCR: ENERGY & FUELS rank: 69 / 171 = 0.404 (2023) - Q2 - T2

Factor impacto CITESCORE: 9.2 - Chemical Engineering (all) (Q1) - Fuel Technology (Q1) - Energy Engineering and Power Technology (Q1)

Factor impacto SCIMAGO: 1.018 - Energy Engineering and Power Technology (Q1) - Fuel Technology (Q1) - Chemical Engineering (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/AEI/PID2019-107737RB-I00
Financiación: info:eu-repo/grantAgreement/ES/DGA-FEDER/T22-20R

Tipo y forma: Article (Published version)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)
Área (Departamento): Área Ingeniería Mecánica (Dpto. Ingeniería Mecánica)
Área (Departamento): Área Tecnologi. Medio Ambiente (Dpto. Ing.Quím.Tecnol.Med.Amb.)