ae9b02253_si_001.pdf (731.64 kB)
Al-Ion Battery Based on Semisolid Electrodes for Higher Specific Energy and Lower Cost
journal contribution
posted on 2020-02-21, 18:33 authored by David Muñoz-Torrero, Jesús Palma, Rebeca Marcilla, Edgar VentosaRechargeable aluminum-ion
batteries (AIBs) have been intensively
studied over past years. However, its commercialization is still hindered
by the relatively high capital cost. Increasing the specific areal
capacity (mAh cm–2) by using a high mass loading
of active material in thick electrodes is an effective strategy to
decrease the battery cost. Unfortunately, the high viscosity and low
ionic conductivity of the ionic liquid electrolytes prevent implementation
of this strategy. Herein, the use of semisolid electrodes in AIBs
is for the first time proposed to (i) address the poor wettability
related to high viscosity and (ii) increase mass transport through
thick electrodes limited by the low ionic conductivity. Indeed, specific
areal capacities of up 7 mAh cm–2 are achieved in
this work, compared to 0.5–1.5 mAh cm–2 as
state-of-the-art. This innovative concept is potentially implementable
to advanced material designs to achieve improved battery performance
in the future.