In:
Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 10, No. 41 ( 2022), p. 21912-21922
Abstract:
Lithium metal batteries (LMBs) with Ni-rich cathode materials providing ultra-high energy density (∼500 W h kg −1 ) are expected to be the next generation of batteries. However, high-voltage LMBs exhibit inferior electrochemical performance at elevated temperatures, due to severe dendrite growth in lithium metal anodes and the structural degradation of Ni-rich cathodes, which should be paid attention to in terms of their practical application. Herein, by introducing 1,3-propane sultone (PS) into the carbonate electrolytes, satisfying cycling stability of Li‖LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) batteries at a high cut-off voltage of 4.45 V and an elevated temperature of 45 °C was achieved, which also shows higher ionic conductivity, wettability and thermodynamic stability. This approach enables uniform lithium plating/stripping at elevated temperatures, because of the construction of a LiF/Li 2 SO 3 -rich interphase layer. Besides, PS inhibits drastic structural change and interfacial side reactions on NCM811. It is also noteworthy that Li‖NCM811 full cells delivered decent performance at high-load cathodes, ultra-thin lithium anodes and lean electrolytes cycling at 4.45 V and 45 °C. This strategy provides a feasible solution for boosting high energy density LMBs under extreme conditions.
Type of Medium:
Online Resource
ISSN:
2050-7488
,
2050-7496
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2702232-8
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