2021
DOI: 10.1007/s40843-021-1682-0
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Waste to wealth: Defect-rich Ni-incorporated spent LiFePO4 for efficient oxygen evolution reaction

Abstract: The development of efficient strategies to recycle lithium-ion battery (LIB) electrode materials is an important yet challenging goal for the sustainable management of battery waste. This work reports a facile and economically efficient method to convert spent cathode material, LiFePO 4 , into a high-performance NiFe oxy/hydroxide catalyst for the oxygen evolution reaction (OER). Herein, Ni-LiFePO 4 is synthesized via the wetness impregnation method and further evolves into defect-rich NiFe oxy/hydroxide nanos… Show more

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Cited by 51 publications
(29 citation statements)
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“…In recent years, the first-row 3d transition metal compounds (TMCs) have been successfully developed and designed as advanced electrocatalysts for boosting water electrolysis. [25][26][27] With the tremendous endeavors devoted, the electrocatalytic performance of TMCs has been remarkably improved, which is even superior to commercial noble metal nanocatalysts. [28][29][30] In spite of the enormous enhancement in electrocatalytic performance observed in TMCs, their performance still can't meet the high requirement for industrial application.…”
Section: Introductionmentioning
confidence: 99%
“…In recent years, the first-row 3d transition metal compounds (TMCs) have been successfully developed and designed as advanced electrocatalysts for boosting water electrolysis. [25][26][27] With the tremendous endeavors devoted, the electrocatalytic performance of TMCs has been remarkably improved, which is even superior to commercial noble metal nanocatalysts. [28][29][30] In spite of the enormous enhancement in electrocatalytic performance observed in TMCs, their performance still can't meet the high requirement for industrial application.…”
Section: Introductionmentioning
confidence: 99%
“…A much bigger specific surface area of battery-type materials can be acquired, with the development of nanomaterials. Thus, the ion diffusion distance was shortened obviously, so the bulk redox reaction is basically changed to surface redox reaction. Most of the redox sites grow on the interface of electrode–electrolyte and have more scattering than in bulk materials, so the reaction dynamic can be faster than in bulk materials, which leads to a capacitor-like response of nanosize battery materials. , As mentioned, nanosize materials are so-called extrinsic pseudocapacitance materials, which show battery-like behavior in bulk redox reaction and capacitor-like behavior reducing the size to nanoscales.…”
Section: Introductionmentioning
confidence: 99%
“…LiNi 1-x-y Mn x Co y O 2 (NMC)-type cathodes are largely used in LIBs due to their high energy density and good electrochemical stability; therefore, bountiful Li, Ni, Mn, and Co metals in spent NMC cathodes can be recovered ( 12 14 ). Transition metals (e.g., Ni, Mn, and Co) usually exhibit promising bifunctional oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) performance ( 15 – 17 ). As one of the most promising energy storage devices, zinc-air batteries (ZABs) need the ORR/OER in the cathode side, which calls for low-cost bifunctional catalysts as cathode materials ( 18 20 ).…”
mentioning
confidence: 99%
“…It is verified that the layered lithium transition metal oxides (typical cathode materials in LIBs) exhibit improved catalytic activity of OER after the delithiation process ( 33 36 ). In addition, with the modification of Ni, the spent LiFePO 4 cathode presents high OER performance because of the in situ evolution of Ni-LiFePO 4 active materials ( 16 ). Even though the spent cathode materials can be used as catalysts after modification, the large particle size limits their applications in ORR, and they are rarely studied in ZABs as cathode materials.…”
mentioning
confidence: 99%