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• W4376121180 abstract "Mn-based layered oxide is extensively investigated as a promising cathode material for potassium-ion batteries due to its high theoretical capacity and natural abundance of manganese. However, the Jahn-Teller distortion caused by high-spin Mn3+ (t2g3 eg1 ) destabilizes the host structure and reduces the cycling stability. Here, K0.02 Na0.55 Mn0.70 Ni0.25 Zn0.05 O2 (denoted as KNMNO-Z) is reported to inhibit the Jahn-Teller effect and reduce the irreversible phase transition. Through the implementation of a Zn-doping strategy, higher Mn valence is achieved in the KNMNO-Z electrode, resulting in a reduction of Mn3+ amount and subsequently leading to an improvement in cyclic stability. Specifically, after 1000 cycles, a high retention rate of 97% is observed. Density functional theory calculations reveals that low-valence Zn2+ ions substituting the transition metal position of Mn regulated the electronic structure around the MnO bonding, thereby alleviating the anisotropic coupling between oxidized O2- and Mn4+ and improving the structural stability. K0.02 Na0.55 Mn0.70 Ni0.25 Zn0.05 O2 provided an initial discharge capacity of 57 mAh g-1 at 100 mA g-1 and a decay rate of only 0.003% per cycle, indicating that the Zn-doped strategy is effective for developing high-performance Mn-based layered oxide cathode materials in PIBs." @default.
• W4376121180 created "2023-05-12" @default.
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• W4376121180 date "2023-05-10" @default.
• W4376121180 modified "2023-10-14" @default.
• W4376121180 title "Zinc‐Doping Strategy on P2‐Type Mn‐Based Layered Oxide Cathode for High‐Performance Potassium‐ion Batteries" @default.
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• W4376121180 doi "https://doi.org/10.1002/smll.202302160" @default.
• W4376121180 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37162450" @default.
• W4376121180 hasPublicationYear "2023" @default.
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