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- W3005337579 abstract "Abstract A conversion‐reaction‐based nanosized Cu 2 P 2 O 7 –carbon composite is investigated as a novel cathode material with superior capacity for lithium‐ion batteries. To overcome the sluggish kinetics of the conversion reaction, the nanosized Cu 2 P 2 O 7 –carbon composite is prepared by high‐energy ball‐milling of Cu 2 P 2 O 7 and conductive carbon to achieve simultaneous nanosizing and carbon mixing. The nanosized Cu 2 P 2 O 7 –carbon composite exhibits a large specific capacity of ≈355 mAh g −1 with an average operation voltage of ≈2.8 V (vs Li + /Li). Moreover, even at 10C (1C = 355 mA g −1 ), the composite delivers a capacity of ≈215 mAh g −1 , corresponding to ≈60% of its theoretical capacity. For 400 cycles at 1C, the nanosized Cu 2 P 2 O 7 –carbon composite exhibits capacity retention of ≈72% compared with the initial capacity as well as high Coulombic efficiency of more than 99%. The reversible conversion reaction mechanism of the nanosized Cu 2 P 2 O 7 –carbon composite under the Li‐cell system is confirmed using various techniques, including operando/ex situ X‐ray diffraction, X‐ray absorption near edge structure spectroscopy, extended X‐ray absorption fine structure spectroscopy, and transmission electron microscopy. It is verified that Cu 2 P 2 O 7 is converted into Li 4 P 2 O 7 and metallic Cu 0 on discharge and reversibly recovered to Cu 2 P 2 O 7 on charge." @default.
- W3005337579 created "2020-02-14" @default.
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- W3005337579 date "2020-02-05" @default.
- W3005337579 modified "2023-09-25" @default.
- W3005337579 title "Development of Novel Cathode with Large Lithium Storage Mechanism Based on Pyrophosphate‐Based Conversion Reaction for Rechargeable Lithium Batteries" @default.
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- W3005337579 doi "https://doi.org/10.1002/smtd.201900847" @default.
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