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- W2893290802 abstract "Abstract A prerequisite for successful development of a K‐ion battery anode based on solid‐solution behavior is to improve its potassium storage capacity. Increasing the solid‐solution domain by decreasing the particle size offers a promising strategy for enhancing the potassium storage capabilities of insertion anode materials. Extended solid‐solution composition range in nanostructured particles is mainly due to the existence of a coherency strain that suppresses phase separation upon intercalation. Here, the intercalation stress effect in size‐dependent solid‐solution behavior is explored by insertion of K + into K 2 Ti 6 O 13 nanowires with different diameters. K 2 Ti 6 O 13 nanowires with small average diameter of ≈5.5 nm deliver a large initial reversible depotassiated capacity of ≈120 mAh g −1 (deinsertion of ≈2.5 K + ) at 0.2 C. The remarkably high reversible depotassiated capacity is mainly ascribed to the decrease of the incoherent interface upon potassiation. The direct observation of enrichment of intragranular particles in potassiated K 2 Ti 6 O 13 nanowires with average diameter of ≈38 nm provides evidence of strain‐accommodating misfits or dislocations in solid‐solution intercalation compounds. This work offers a promising route to utilize coherency strain energy for K‐ion batteries with improved specific capacity and alleviated irreversible capacity loss." @default.
- W2893290802 created "2018-10-05" @default.
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- W2893290802 date "2018-09-27" @default.
- W2893290802 modified "2023-10-17" @default.
- W2893290802 title "Boosting Potassium Storage Capacity Based on Stress-Induced Size-Dependent Solid-Solution Behavior" @default.
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- W2893290802 doi "https://doi.org/10.1002/aenm.201802175" @default.
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