Polyanionic frameworks in batteries: a history reviewed by RS2E researchers
Christian Masquelier (LRCS, Amiens, France) and Laurence Croguennec (ICMCB, Bordeaux, France), researchers affiliated with both Alistore-ERI and RS2E networks, recently reviewed around 20 years of research on polyanionic structures (phosphates, silicates, sulfates) used as electrode materials in Li (or Na) batteries. Their 42-pages paper, supported by 500 references to previously published articles, synthesizes the immense efforts made in the field. Originally written as an Alistore-ERI (RS2E’s European counterpart) white paper, the review has been accepted for publication in the prestigious journal Chemical Reviews, since June 6th, 2013.
In 1997, the discovery of LiFePO4 has been the starting point of the rising importance of polyanionic structures in battery research, both in academic and industrial fields. Polyanionic frameworks indeed lend interesting properties to positive electrodes such as great structural stability (that allows great cyclability properties and fast ion motion) and high operating voltages vs. Li+/Li in particular for the Fe3+/Fe2+ redox couple.
This extensive paper deals with the following structural families: NASICON/anti-NASICON (materials allowing fast ion conduction through their structure), compositions based on the olivine structure (such as LiFePO4, regarded as a promising choice for electric vehicle application), structures branded as “exotic” by the two researchers (borates, silicates, ….) as well as new promising materials developed within the RS2E, based on the tavorite and triplite frameworks. Alistore-ERI is also an important partner in those promising researches through the funding of Jean-Marcel Ateba Mba’s PhD.
Pr. Christian Masquelier has been studying for 25 years the crystal chemistry of sodium ion conductors and positive electrode materials for Li-ion batteries. Dr. Croguennec has been studying for 18 years the crystal chemistry of electrode materials developed for Li-ion batteries (characterization of mechanisms involved upon cycling).
Polyanionic (Phosphates, Silicates, Sulfates) Frameworks as Electrode Materials for Rechargeable Li (or Na) Batteries. Christian Masquelier and Laurence Croguennec.
Chemical Reviews, Article ASAP, 6 juin 2013, DOI: 10.1021/cr3001862.