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Direct Recycling of Aged LiMn 2 O 4 Cathode Materials used in Aqueous Lithium‐ion Batteries: Processes and Sensitivities
Author(s) -
Wang Han,
Whitacre Jay F.
Publication year - 2018
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201800315
Subject(s) - electrochemistry , materials science , lithium (medication) , cathode , electrolyte , hydrothermal circulation , aqueous solution , battery (electricity) , lithium ion battery , ion , chemical engineering , mineralogy , inorganic chemistry , chemistry , electrode , medicine , power (physics) , physics , organic chemistry , quantum mechanics , engineering , endocrinology
Aged LiMn 2 O 4 cathode materials were collected from aqueous electrolyte lithium‐ion batteries after long‐term cycling. The aged LiMn 2 O 4 cathode materials, which had variable states of charge, were recycled using two different “direct“ methods: solid‐state, and hydrothermal. X‐ray diffraction and electrochemical analysis revealed that the hydrothermal method yielded a recycled product with higher phase purity, electrochemical energy storage capacity. Additionally, the importance of the state of charge of the aged LiMn 2 O 4 on the recycled product varied depending on the methodology used. While the recycled products from the solid‐state method were sensitive to the state of charge of the aged LiMn 2 O 4 , the state of charge of the aged LiMn 2 O 4 doesn't have an obvious effect on the hydrothermally recycled product.