Anion Reactivity in Cation‐Disordered Rocksalt Cathode Materials: The Influence of Fluorine Substitution
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DOI: 10.1002/aenm.202001500
Abstract: The demand for high energy‐density, mass‐producible cathode materials has spurred the exploration of new material structures and compositions. Lithium‐excess, cation‐disordered rocksalt (DRX) materials are a new class of transition metal oxides that display high capacity… read more here.
Keywords: reactivity; cathode materials; disordered rocksalt; cation disordered ... See more keywords
Synthesis and electrochemical properties of cation‐disordered rock‐salt xLi3NbO4·(1 − x) NiO compounds for Li‐ion batteries
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DOI: 10.1002/er.6050
Abstract: In this study, Li‐excess cation‐disordered rock‐salt cathode materials, xLi3NbO4·(1 − x) NiO (LNNO, 0.55 ≤ x ≤ 0.7), are synthesized to explore the effect of composition on the structure and electrochemical performance using a sol‐gel method for the first… read more here.
Keywords: cation disordered; disordered rock; rock; rock salt ... See more keywords
Role of Redox-Inactive Transition-Metals in the Behavior of Cation-Disordered Rocksalt Cathodes.
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DOI: 10.1002/smll.202000656
Abstract: Owing to the capacity boost from oxygen redox activities, Li-rich cation-disordered rocksalts (LRCDRS) represent a new class of promising high-energy Li-ion battery cathode materials. Redox-inactive transition-metal (TM) cations, typically d0 TM, are essential in the… read more here.
Keywords: oxygen; cation disordered; redox; inactive transition ... See more keywords
Enabling High-Performance Layered Li-Rich Oxide Cathodes by Regulating the Formation of Integrated Cation-Disordered Domains.
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DOI: 10.1002/smll.202307292
Abstract: Layered Li-rich oxide cathode materials are capable of offering high energy density due to their cumulative cationic and anionic redox mechanism during (de)lithiation process. However, the structural instability of the layered Li-rich oxide cathode materials,… read more here.
Keywords: capacity; cation disordered; disordered domains; layered rich ... See more keywords
Comprehensive Investigation of the Crystal Structure of Cation-Disordered Li3VO4 as a High-Rate Anode Material: Unveiling the Dichotomy between Order and Disorder.
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DOI: 10.1002/smll.202405259
Abstract: This study investigates mechanochemical synthesis and cation-disordering mechanism of wurtzite-type Li3VO4 (LVO), highlighting its promise as a high-performance anode material for lithium-ion batteries and hybrid supercapacitors. Mechanochemical treatment of pristine LVO using a high-energy ball… read more here.
Keywords: rate; cation disordered; anode material; order disorder ... See more keywords
Reversible Mn/Cr dual redox in cation-disordered Li-excess cathode materials for stable lithium ion batteries
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DOI: 10.1016/j.actamat.2021.116935
Abstract: Abstract Cation-disordered Li-excess oxides/oxyfluorides have opened the door for designing alternative, high energy cathodes. However, achieving long cycle life and high rate capability represents a major challenge for disordered rocksalt cathodes (DRX). Herein, we develop… read more here.
Keywords: redox; cycle life; dual redox; cation disordered ... See more keywords
Significant role of oxygen redox reaction with O2-release in Li-excess cation-disordered rock-salt cathodes Li2+2Mn1−Ti1−O4: First-principles calculations
Sign Up to like & getrecommendations! Published in 2020 at "Electrochimica Acta"
DOI: 10.1016/j.electacta.2019.135286
Abstract: Abstract Cation-disordered rock-salt oxides Li 2 + 2 x Mn 1 − x Ti 1 − x O 4 with Li-excess x are promising Li-ion battery cathodes employing the anion-redox strategy. To clarify cathode properties… read more here.
Keywords: cation; cation disordered; rock salt; principles calculations ... See more keywords
Tailoring the redox-active transition metal content to enhance cycling stability in cation-disordered rock-salt oxides
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DOI: 10.1016/j.ensm.2021.08.045
Abstract: Abstract Lithium-excess cation-disordered rock-salt oxides (DRXs) are investigated intensively as cathode materials for future lithium-ion batteries combining cationic and anionic redox reactions. However, the lattice oxygen redox can cause severe oxygen release resulting in rapid… read more here.
Keywords: salt oxides; rock salt; cation disordered; content ... See more keywords
Synthesis and electrochemical properties of cation-disordered Li-Ni-Ti-O compounds as cathode material for lithium ion batteries
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DOI: 10.1016/j.jallcom.2017.08.261
Abstract: Abstract Li-excess disordered rock-salt cathode material, Li 1+z/3 Ni 1/2-z/2 Ti 1/2+z/6 O 2 (Z = 0, 0.1, 0.2, 0.3, 0.4, 0.5) compounds have been synthesized via a facile sol-gel method. The X-ray diffraction (XRD) indicates that… read more here.
Keywords: electrochemical properties; cation disordered; synthesis electrochemical; cathode material ... See more keywords
Chemical Origin of in Situ Carbon Dioxide Outgassing from a Cation-Disordered Rock Salt Cathode
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DOI: 10.1021/acs.chemmater.4c00756
Abstract: In situ carbon dioxide (CO2) outgassing is a common phenomenon in lithium-ion batteries (LiBs), primarily due to parasitic side reactions at the cathode–electrolyte interface. However, little is known about the chemical origins of the in… read more here.
Keywords: carbon dioxide; carbon; cation disordered; disordered rock ... See more keywords
Structural Stabilization of Cation-Disordered Rock-Salt Cathode Materials: Coupling between a High-Ratio Inactive Ti4+ Cation and a Mn2+/Mn4+ Two-Electron Redox Pair.
Sign Up to like & getrecommendations! Published in 2022 at "ACS applied materials & interfaces"
DOI: 10.1021/acsami.2c10652
Abstract: Cation-disordered rock-salt cathode materials are featured by their extraordinarily high specific capacities in lithium-ion batteries primarily contributed by anion redox reactions. Unfortunately, anion redox reactions can trigger oxygen release in this class of materials, leading… read more here.
Keywords: rock salt; cation; cation disordered; disordered rock ... See more keywords