2022
DOI: 10.1021/acs.chemmater.2c00030
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Promoting Reversibility of Multielectron Redox in Alkali-Rich Sulfide Cathodes through Cryomilling

Abstract: Conventional cathodes for Li-ion batteries (LIBs) are reaching their theoretical capacity limits. One way to meet the growing demands for high-capacity LIBs is by developing so-called Li-rich cathode materials that greatly benefit from additional capacities from anionic moieties in the structure. Li-rich materials are intrinsically subject to higher degrees of (de)­intercalation, leaving the particles more prone to fractures and thus rapid capacity fade. Alkali-rich LiNaFeS2 reversibly cycles with capacities e… Show more

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Cited by 10 publications
(14 citation statements)
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“…Noteworthy, optimizing the internal lattice strain, is feasible for (Li 2 Fe)SO by post-heat treatment strategy, was recently reported to have strong influence on the electrochemical performance for other cathode materials. 30 This observation also confirms the possibility of using post-milling heat treatment to control the internal structure and crystallinity of (Li 2 Fe)SO. Changing the material's crystallinity was reported to have a strong influence on the transport properties of Li + inside the material, with no general rule determining which has the higher ionic conductivity.…”
Section: Monitoring Of the Mechanochemical Reaction By Ex Situ Xrd St...supporting
confidence: 63%
“…Noteworthy, optimizing the internal lattice strain, is feasible for (Li 2 Fe)SO by post-heat treatment strategy, was recently reported to have strong influence on the electrochemical performance for other cathode materials. 30 This observation also confirms the possibility of using post-milling heat treatment to control the internal structure and crystallinity of (Li 2 Fe)SO. Changing the material's crystallinity was reported to have a strong influence on the transport properties of Li + inside the material, with no general rule determining which has the higher ionic conductivity.…”
Section: Monitoring Of the Mechanochemical Reaction By Ex Situ Xrd St...supporting
confidence: 63%
“…The discharge and charge profiles for both materials are compared in Figure b. The capacity of LiNaFeS 2 fades somewhat quickly, largely due to particle fracturing associated with the removal of large Na + . Though the capacity fades, the cycle 1 and cycle 2 charge curves are similar in shape, suggesting that the mechanism is largely unchanged.…”
Section: Resultsmentioning
confidence: 99%
“…Transition metal sulfides are an attractive class of materials for emerging battery cathodes, but a foremost challenge is increasing the energy density by identifying higher voltage materials. 12,[39][40][41] The equilibrium voltages of reported sulfide cathodes are mostly around ~2-2.5 V, and encompass a variety of physical and electronic mechanisms associated with cation and anion redox. 10 In this (and concurrently emerging 8 ) work, a class of thiophosphates (Li2FeP2S6, https://doi.org/10.26434/chemrxiv-2024-sd2kb ORCID: https://orcid.org/0000-0002-1670-9933 Content not peer-reviewed by ChemRxiv.…”
Section: Toward High-voltage Sulfides With Multielectron Capacitymentioning
confidence: 99%