Composite Solid Electrolytes for Solid State Batteries


Ribé Bachiller, Àlex


The current climate change accelerated by greenhouse gas emissions is causing the transi-tion to renewable energy sources. However, there is a mismatch of demand and generation due to the intermittent nature of these natural phenomena. At the same time, handheld elec-tronic devices made its way to great part of modern society’s pockets and are a part of daily life. These portable electronics, like smartphones and laptop computers, function thanks to rechargeable lithium-ion batteries (LIBs). These batteries retain capacity after many charge-discharge cycles, rendering them usable for years. When wanting to use LIBs for applications requiring larger scales, such as renewable energy storage or for electric vehicles, their compromises become more evident. These compromises are safety concerns regarding possible release of toxic, flammable gases and thermal runa-way, as well as heat generation and low charging speeds. The culprit behind these concerns are the organic liquid electrolytes employed in LIBs. Substituting liquid electrolytes for solid components could entirely eliminate flammability and toxicity concerns, while improving cycle life and energy density of the batteries. Unfortunately, solid polymer electrolytes and solid inorganic electrolytes come both with their own shortcomings. Composite solid electrolytes containing polymers and inorganic materials have been conceived to unite the best properties of each group into a single material, which could allow for the development of all-solid-state LIBs.



Colominas Guàrdia, Carles ; Norby, Poul
Hjelm, Johan


IQS SE - Master’s Degree in Materials Science and Engineering