TY - JOUR
T1 - High Entropy Oxide (CrMnFeNiMg)3O4 with Large Compositional Space Shows Long-Term Stability as Cathode in Lithium-Sulfur Batteries
AU - Chung, Sheng Heng
AU - Wu, Yi Hsuan
AU - Tseng, Yu Hsun
AU - Nguyen, Thi Xuyen
AU - Ting, Jyh Ming
N1 - Funding Information:
This work has been supported by the National Science and Technology Council in Taiwan under Grand Number MOST 110–2224‐E‐006‐005, MOST 111–2224‐E‐006‐005, and MOST 111‐2636‐E‐006‐027.
Publisher Copyright:
© 2023 Wiley-VCH GmbH.
PY - 2023/4/21
Y1 - 2023/4/21
N2 - The repeated formation and irreversible diffusion of liquid-state lithium polysulfides (LiPSs) are the primary challenges in the development of high-energy-density lithium-sulfur battery (LSB). An effective strategy to alleviate the resulting polysulfide loss is critical for the stability of LSBs. In this regard, high entropy oxides (HEOs) appear as a promising additive for the adsorption and conversion of LiPSs owing to the diverse active sites, offering unparalleled synergistic effects. Herein, we have developed a (CrMnFeNiMg)3O4 HEO as a functional polysulfide trapper in LSB cathode. The adsorption of LiPSs by the metal species (i. e., Cr, Mn, Fe, Ni, and Mg) in the HEO takes place through two different paths and leads to enhanced electrochemical stability. We demonstrate that the optimal sulfur cathode with the (CrMnFeNiMg)3O4 HEO attains a high peak and reversible discharge capacities of 857 mAh g−1 and 552 mAh g−1, respectively, at a cycling rate of C/10, a long cycle life of 300 cycles, and a high rate performance at the cycling rates from C/10 to C/2.
AB - The repeated formation and irreversible diffusion of liquid-state lithium polysulfides (LiPSs) are the primary challenges in the development of high-energy-density lithium-sulfur battery (LSB). An effective strategy to alleviate the resulting polysulfide loss is critical for the stability of LSBs. In this regard, high entropy oxides (HEOs) appear as a promising additive for the adsorption and conversion of LiPSs owing to the diverse active sites, offering unparalleled synergistic effects. Herein, we have developed a (CrMnFeNiMg)3O4 HEO as a functional polysulfide trapper in LSB cathode. The adsorption of LiPSs by the metal species (i. e., Cr, Mn, Fe, Ni, and Mg) in the HEO takes place through two different paths and leads to enhanced electrochemical stability. We demonstrate that the optimal sulfur cathode with the (CrMnFeNiMg)3O4 HEO attains a high peak and reversible discharge capacities of 857 mAh g−1 and 552 mAh g−1, respectively, at a cycling rate of C/10, a long cycle life of 300 cycles, and a high rate performance at the cycling rates from C/10 to C/2.
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U2 - 10.1002/cssc.202300135
DO - 10.1002/cssc.202300135
M3 - Article
C2 - 36795009
AN - SCOPUS:85150918426
SN - 1864-5631
VL - 16
JO - ChemSusChem
JF - ChemSusChem
IS - 8
M1 - e202300135
ER -