Journal
ENERGY STORAGE MATERIALS
Volume 53, Issue -, Pages 514-522Publisher
ELSEVIER
DOI: 10.1016/j.ensm.2022.09.034
Keywords
Aqueous aluminum batteries; Cathode material; SpinelAl2; 3Li1; Cycle stability; Al ion storage mechanism
Funding
- Natural Science Foun-dation of Guangxi Province
- National Natural Science Foundation of China
- Specific Research Project of Guangxi for Research Bases and Talents
- [2019GXNSFDA245014]
- [2019GXNSFBA245055]
- [21875292]
- [21875097]
- [51901054]
- [AD19245030]
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In this study, a spinel Al2/3Li1/3Mn2O4 (ALMO) cathode material with high discharge capacity and cycle stability was successfully synthesized. The Al ion storage mechanism of the ALMO cathode material was analyzed, providing a new perspective for the development of low-cost and high-performance AAB cathode materials.
Aqueous aluminum batteries (AABs) are a very promising supplementary energy storage device for lithium-ion batteries (LIBs) in large-scale energy storage, but the lack of cathode materials with high energy density and cycle stability greatly limits the development of AABs. Herein, a spinel Al2/3Li1/3Mn2O4 (ALMO) cathode ma-terial has been synthesized via an electrochemical conversion reaction using LiMn2O4 (LMO) as the precursor. The ALMO cathode releases a discharge capacity of 151.8 mA h g-1 under a current density of 100 mA g-1 and a capacity retention of 64.1% over 1000 cycles. The full cell fabricated using the ALMO cathode exhibits a high energy density of 183 W h kg-1 and an average operating voltage of about 1.31 V, demonstrating a promising device for large-scale energy storage. The Al ion storage mechanism of the ALMO cathode material is scrutinized by a series of ex-situ analysis techniques, indicating the Al3+ ions can reversibly extract/insert out/into the ALMO cathode material with the oxidation/reduction of Mn. This work is expected to boost the development of the cathode materials for the low-cost and high-performance AABs.
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