Single-ion conducting polymer electrolytes are considered ideal for suppressing dendritic lithium deposition, but so far suffered instability at elevated potentials and, thus, incompatibility with next-generation high-energy cathodes such as Ni-rich Li[Ni1-x-yCoxMny]O2 (NCM(1-x-y)xy). Herein, we show that the thoughtful design of electrolytes based on multi-block co-poly(arylene ether sulfone)s and incorporating suitable “molecular transporters” (such as propylene carbonate) may, in fact, enable the realization of high-energy lithium-metal batteries employing, for the first time, NCM811-based positive electrodes. These batteries can be cycled with high reversible capacity at various temperatures, including 20 °C and even 0 °C, for more than 500 cycles without substantial capacity fading when applying an optimized charging mode. The careful electrochemical characterization and ex situ investigation of the electrode/electrolyte interfaces reveals, moreover, that the use of such single-ion conductor successfully inhibits dendritic lithium metal deposition, while particular care has to be taken for the interface between the electrolyte and the NCM811 cathode.

High-energy lithium batteries based on single-ion conducting polymer electrolytes and Li[Ni0.8Co0.1Mn0.1]O2 cathodes / Chen, Z.; Steinle, D.; Nguyen, H. -D.; Kim, J. -K.; Mayer, A.; Shi, J.; Paillard, E.; Iojoiu, C.; Passerini, S.; Bresser, D.. - In: NANO ENERGY. - ISSN 2211-2855. - 77:(2020). [10.1016/j.nanoen.2020.105129]

High-energy lithium batteries based on single-ion conducting polymer electrolytes and Li[Ni0.8Co0.1Mn0.1]O2 cathodes

Passerini S.
;
2020

Abstract

Single-ion conducting polymer electrolytes are considered ideal for suppressing dendritic lithium deposition, but so far suffered instability at elevated potentials and, thus, incompatibility with next-generation high-energy cathodes such as Ni-rich Li[Ni1-x-yCoxMny]O2 (NCM(1-x-y)xy). Herein, we show that the thoughtful design of electrolytes based on multi-block co-poly(arylene ether sulfone)s and incorporating suitable “molecular transporters” (such as propylene carbonate) may, in fact, enable the realization of high-energy lithium-metal batteries employing, for the first time, NCM811-based positive electrodes. These batteries can be cycled with high reversible capacity at various temperatures, including 20 °C and even 0 °C, for more than 500 cycles without substantial capacity fading when applying an optimized charging mode. The careful electrochemical characterization and ex situ investigation of the electrode/electrolyte interfaces reveals, moreover, that the use of such single-ion conductor successfully inhibits dendritic lithium metal deposition, while particular care has to be taken for the interface between the electrolyte and the NCM811 cathode.
2020
spinel zinc ferrite ZnFe2O4; EXAFS; XAS; Li-ion anodes; lithiation mechanism
01 Pubblicazione su rivista::01a Articolo in rivista
High-energy lithium batteries based on single-ion conducting polymer electrolytes and Li[Ni0.8Co0.1Mn0.1]O2 cathodes / Chen, Z.; Steinle, D.; Nguyen, H. -D.; Kim, J. -K.; Mayer, A.; Shi, J.; Paillard, E.; Iojoiu, C.; Passerini, S.; Bresser, D.. - In: NANO ENERGY. - ISSN 2211-2855. - 77:(2020). [10.1016/j.nanoen.2020.105129]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1651565
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