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| 024 | 7 | _ | |a 10.1039/D1MA00009H |2 doi |
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| 100 | 1 | _ | |a Stolz, Lukas |0 P:(DE-Juel1)181055 |b 0 |u fzj |
| 245 | _ | _ | |a Realizing poly(ethylene oxide) as a polymer for solid electrolytes in high voltage lithium batteries via simple modification of the cell setup |
| 260 | _ | _ | |a Cambridge |c 2021 |b Royal Society of Chemistry |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 336 | 7 | _ | |a Journal Article |b journal |m journal |0 PUB:(DE-HGF)16 |s 1715085410_7023 |2 PUB:(DE-HGF) |
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| 520 | _ | _ | |a Pure, i.e., linear poly(ethylene oxide)-based solid polymer electrolyte (PEO-based SPE) as a common benchmark system for Li metal batteries (LMBs) is frequently assumed to be unsuitable for high voltage applications e.g., with LiNi0.6Mn0.2Co0.2O2 (NMC622)-based cathodes. In fact, a destructive failure appears immediately after cell operation, seen by a random-like “voltage noise” during charge, rendering continuous charge/discharge cycling in e.g., NMC622||Li cells not possible. Counterintuitively, this failure is a result of short-circuits in the course of e.g., Li dendrite penetration. It is shown that the distance between the electrodes plays a crucial role. This failure is more likely with a lower distance, particularly when the SPE is mechanically prone to shrinkage, for example at higher temperatures as systematically revealed by mechanical compression tests. Additionally, the active mass loading has a crucial impact on short circuits, and thus the “voltage noise” failure, as well. An effective and practically simple solution to realize cell operation with a PEO-based SPE is the incorporation of a spacer between the electrodes. This modification prevents the detrimental shrinkage and enables charge/discharge cycling performance in NMC622||Li cells with a defined and constant electrode distance, thus without voltage noise, and finally fulfills a reasonable benchmark for systematic R&D with specific capacities above 150 mA h g−1 even at 40 °C. |
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| 700 | 1 | _ | |a Homann, Gerrit |0 P:(DE-Juel1)169878 |b 1 |
| 700 | 1 | _ | |a Winter, Martin |0 P:(DE-Juel1)166130 |b 2 |e Corresponding author |u fzj |
| 700 | 1 | _ | |a Kasnatscheew, Johannes |0 P:(DE-Juel1)171865 |b 3 |e Corresponding author |
| 773 | _ | _ | |a 10.1039/D1MA00009H |g Vol. 2, no. 10, p. 3251 - 3256 |0 PERI:(DE-600)3031236-X |n 10 |p 3251-3256 |t Materials advances |v 2 |y 2021 |x 2633-5409 |
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