High‐Performance Na3V2(PO4)3/C Cathode for Sodium‐Ion Batteries Prepared by a Ball‐Milling‐Assisted Method. Issue 19 (27th May 2016)

• Record Type: Journal Article
• Authors: Klee, Rafael; Aragón, María José; Alcántara, Ricardo; Tirado, José L.; Lavela, Pedro
• Is Part Of: European journal of inorganic chemistry. Issue 19(2016)
• Page Start: 3212
• Page End: 3218
• Publication Date: 2016-05-27
• Subjects: Batteries -- Sodium‐ion batteries -- Electrochemistry -- Sol–gel processes -- Insertion -- Vanadium; Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.201600241
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract : Na3 V2 (PO4 )3 /C samples are synthesized by a wet‐ball‐milling and in situ carbon‐compositing process. The structural and morphological characterization of the milled samples shows that they are highly pure and crystalline composites, in which the specific surface undergoes an effective increase. The sample prepared by milling for 24 h shows an excellent electrochemical behavior and reaches a capacity value as high as 108.5 mA h g –1 at 40 C and full capacity recovery when returned to a C/2 rate at the end of the cycling. Furthermore, this sample is able to maintain 111 mA h g –1 at 10 C after 100 cycles. This exceptional performance is correlated to the good kinetic response, as evidenced by impedance spectroscopy and the analysis of the cell polarization at the charge and discharge branches. Abstract : The synthesis of Na3 V2 (PO4 )3 /C by a wet‐ball‐milling and an in situ carbon‐compositing process yields pure and crystalline composites with enlarged specific surface areas. This material reveals good performance as a cathode for sodium‐ion batteries owing to its excellent kinetic response.