Fluorinated Carbons as Rechargeable Li-Ion Battery Cathodes in the Voltage Window of 0.5–4.8 V
In: ACS Applied Materials & Interfaces, Jg. 13 (2021-07-07), Heft 26, S. 30576-30582
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Zugriff:
Fluorinated carbon (CFx) cathodes have the highest theoretical energy density among lithium primary batteries. However, it is still a huge challenge to be reversible. Here, CFxis proposed as a high-performance cathode material for rechargeable lithium-ion batteries in the extended voltage window of 0.5–4.8 V. Specifically, the fluorinated graphite CF0.88exhibits an initial specific discharge capacity of 1382 mAh g–1(2362 Wh kg–1) and a specific discharge capacity of 782 mAh g–1at the 2nd cycle and maintains a specific discharge capacity of 543 mAh g–1(508 Wh kg–1) after the 20th cycle. This rechargeable behavior is associated with the conversion of CFxto LiF + C (>1.5 V) and then to Li1+xFC (0.5–1.5 V) during the initial discharge process; Li1+xFC is reversible to LiF + C in the following charge–discharge process (0.5–4.8 V). By extending the voltage window, CFxcathodes can show new electrochemical behaviors. Our research has provided new Li-free cathode materials for rechargeable batteries and insights for improving the performance of a Li/CFxsecondary battery.
Titel: |
Fluorinated Carbons as Rechargeable Li-Ion Battery Cathodes in the Voltage Window of 0.5–4.8 V
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Autor/in / Beteiligte Person: | Chen, Pengyu ; Jiang, Cheng ; Jiang, Jie ; Zou, Jian ; Ran, Qiwen ; Wang, Xin ; Niu, Xiaobin ; Wang, Liping |
Zeitschrift: | ACS Applied Materials & Interfaces, Jg. 13 (2021-07-07), Heft 26, S. 30576-30582 |
Veröffentlichung: | 2021 |
Medientyp: | serialPeriodical |
ISSN: | 1944-8244 (print) |
DOI: | 10.1021/acsami.1c05332 |
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