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Zero-strain high entropy spinel oxide (FeNiCuCrMn)3O4@rGO as high-performance anode for sodium ion battery

Journal Article · · Chemical Engineering Journal
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  1. China Univ. of Mining and Technology, Xuzhou, Jiangsu (China)
  2. Argonne National Laboratory (ANL), Argonne, IL (United States)
  3. Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
  4. Central South University, Changsha (China)
High entropy spinel oxides (HEOs), as a new type of anode material with at least five transition metal elements and high theoretical specific capacity, have enormous promise in sodium ion batteries (SIBs). However, the influence of different transition metal elements on the structure and electrochemical performances of HEOs is not clear. Here, in this study, the addition of Mn to HEO can increase the surface oxygen vacancy (Ov) concentration, shorten the band gap, and enhance the electrochemical performance of (FeNiCuCrMn)3O4@rGO. XPS results show (FeNiCuCrMn)3O4@rGO has the highest surface Ov concentration. Ab initio calculations demonstrate that the indirect band gap of (FeNiCuCrMn)3O4@rGO is 0.068 eV. In situ X-ray diffraction and synchrotron X-ray absorption spectroscopy reveal that (FeNiCuCrMn)3O4@rGO exhibits a zero-strain characteristic with an inconsequential unit cell volume change of 0.2 %. Specifically, (FeNiCuCrMn)3O4@rGO as anode materials for SIBs show good cyclic stability (with a capacity retention of 84 % at 500 mA g−1 after 3000 cycles). Overall, this work provides a new direction for optimizing transition metal elements in HEOs.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC)
Grant/Contract Number:
SC0012704
OSTI ID:
2569476
Alternate ID(s):
OSTI ID: 2480372
OSTI ID: 2574351
Report Number(s):
BNL--228290-2025-JAAM
Journal Information:
Chemical Engineering Journal, Journal Name: Chemical Engineering Journal Vol. 503; ISSN 1385-8947
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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