Lead Bromide Perovskite Fast Ionic Conductor for High-Power Charge Storage Battery Anodes
Nuria Vicente a, Germà Garcia-Belmonte a
a Universitat Jaume I, Institute of Advanced Materials (INAM) - Spain, Avinguda de Vicent Sos Baynat, Castelló de la Plana, Spain
NIPHO
Proceedings of Perovskite Thin Film Photovoltaics (ABXPV17)
València, Spain, 2017 March 1st - 2nd
Organizers: Henk Bolink and David Cahen
Poster, Nuria Vicente, 050
Publication date: 18th December 2016

Hybrid halide perovskite compounds have recently revolutionized the field of photovoltaics with a vertiginous enhancement in light-to-electricity power conversion efficiency currently reaching outstanding 22.1% values. In parallel to photovoltaic uses, organometal perovskites have been proposed as their use as active material for lithium-ion battery (LIB) anodes. It is presented here promising results and progress into the understanding of the storage electrochemical mechanism of lead halide perovskite materials.  Methylammonium lead bromide (MAPbBr3) exhibit rather stable specific capacity ≈200 mA h g -1 with an excellent rate capability. These preliminary results are comparable to current commercial anodes capacities.  Moreover, perovskite electrodes allow checking ion diffusion dynamics of extrinsic defects (Li + ) in a fully controllable way. Our strategy avoids the inherent uncertainty found in analyzing native defect migration in a multicomponent environment, which confirms the fast ionic conductor character of perovskite materials from a direct measurement that does not rely on simulation tools. Ion diffusion within the host matrix dominates the charging rates that are accessible by means impedance spectroscopy.



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