Electron bottleneck in the charge/discharge Mechanism of Lithium Titanates for Batteries
Ventosa, Edgar (Institut de Recerca en Energia de Catalunya)
Skoumal, Marcel (Institut de Recerca en Energia de Catalunya)
Vazquez, Francisco Javier (Institut de Recerca en Energia de Catalunya)
Flox, Cristina (Institut de Recerca en Energia de Catalunya)
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia)
Morante, Joan Ramon (Universitat de Barcelona. Departament d'Electrònica)

Date:	2015
Abstract:	The semi-solid flow battery (SSFB) is a promising storage energy technology featured by employing semi-solid fluid electrodes containing conductive additive and active Li-ion battery materials. The state of art anode material for SSFB is LiTiO (LTO). This work shows that LTO improves drastically the performance in fluid electrode via hydrogen annealing manifesting the importance of the electrical conductivity of the active material in SSFBs. On the other hand, the properties of fluid electrodes allow the contributions of ionic and electrical resistance to be separated in operando. The asymmetric overpotential observed in LiTiO and TiO is proposed to originate from the so-called electron bottleneck mechanism based on the transformation from electrically insulator to conductor upon (de-)lithiation, or vice versa, which should be considered when modelling, evaluating or designing advanced materials based on LiTiO, TiO or others with insulating-conducting behavior materials.
Grants:	European Commission 608621 Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-1638
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Batteries ; Conductivity ; Metal oxides ; Oxidation ; Reduction
Published in:	ChemSusChem, Vol. 8, Issue 10 (mAY 2015) , P. 1737-1744, ISSN 1864-564X

DOI: 10.1002/cssc.201500349
PMID: 25892099

8 p, 1.7 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles