In recent years, large-scale energy storage systems are becoming extremely important to realize the load levelling of intermittent renewable energy sources, such as wind and solar, into the grid. Secondary (rechargeable) sodium-based batteries may represent the key enabling technology in this respect, because of high-energy density, low-cost, simple design, and easiness in maintenance. However, currently studied materials and processes are not in line with a truly sustainable point of view. Here we offer an overview of our recent developments on innovative polymer electrolytes for sodium-ion batteries. In our labs, we develop different kind of polymer electrolytes by means of different techniques, including simple solvent casting and UV-induced photopolymerization (UV-curing), being simple, low-cost and easily scalable to an industrial level. Besides, our research focuses on new sustainable polymers such as cellulose or linear polyglycidols, that could be a solution in future applications. All samples were thoroughly characterized from the physico-chemical and electrochemical viewpoints. They exhibited excellent ionic conductivity and wide electrochemical stability window, which ensure safe operation even at ambient conditions. Electrochemical performances in lab-scale devices were evaluated by means of cyclic voltammetry and galvanostatic charge/discharge cycling exploiting different electrode materials. Our benchmark solid polymer electrolyte, when assembled in TiO2-based lab-scale sodium cells, delivered a stable specific capacity of about 250 mAh g−1 at ambient temperature upon constant current cycling at 0.1 mA cm−2. Its intrinsic stability was also confirmed by very long-term cycling test that exceeded 5200 h of continuous operation, which is definitely remarkable for a truly quasi-solid system.

The Progressive Transition towards Solid Sodium Batteries: a Polymeric Approach / Bella, F.; Colò, F.; Piana, G.; Falco, M.; Maruccia, E.; Lingua, G.; Fagiolari, L.; Meligrana, G.; Gerbaldi, C.. - ELETTRONICO. - (2019), pp. 28-28. (Intervento presentato al convegno 70th Annual ISE Meeting tenutosi a Durban (South Africa) nel 4 - 9 August 2019).

The Progressive Transition towards Solid Sodium Batteries: a Polymeric Approach

F. Bella;F. Colò;G. Piana;M. Falco;E. Maruccia;G. Lingua;L. Fagiolari;G. Meligrana;C. Gerbaldi
2019

Abstract

In recent years, large-scale energy storage systems are becoming extremely important to realize the load levelling of intermittent renewable energy sources, such as wind and solar, into the grid. Secondary (rechargeable) sodium-based batteries may represent the key enabling technology in this respect, because of high-energy density, low-cost, simple design, and easiness in maintenance. However, currently studied materials and processes are not in line with a truly sustainable point of view. Here we offer an overview of our recent developments on innovative polymer electrolytes for sodium-ion batteries. In our labs, we develop different kind of polymer electrolytes by means of different techniques, including simple solvent casting and UV-induced photopolymerization (UV-curing), being simple, low-cost and easily scalable to an industrial level. Besides, our research focuses on new sustainable polymers such as cellulose or linear polyglycidols, that could be a solution in future applications. All samples were thoroughly characterized from the physico-chemical and electrochemical viewpoints. They exhibited excellent ionic conductivity and wide electrochemical stability window, which ensure safe operation even at ambient conditions. Electrochemical performances in lab-scale devices were evaluated by means of cyclic voltammetry and galvanostatic charge/discharge cycling exploiting different electrode materials. Our benchmark solid polymer electrolyte, when assembled in TiO2-based lab-scale sodium cells, delivered a stable specific capacity of about 250 mAh g−1 at ambient temperature upon constant current cycling at 0.1 mA cm−2. Its intrinsic stability was also confirmed by very long-term cycling test that exceeded 5200 h of continuous operation, which is definitely remarkable for a truly quasi-solid system.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2754958
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