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- W4200089760 abstract "The existing electrode materials for lithium-ion batteries (LIBs) generally suffer from poor rate capability at low temperatures, severely limiting their applications in winter and cold climate area. Here, partially reduced TiNb24 O62 (PR-TNO) are reported that demonstrates excellent electrochemical performance in a broad temperature range, notably at low temperatures. Its crystal structure is similar to that of Ti2 Nb10 O29 upon partial reduction in H2 . The titanium and niobium ions in PR-TNO enable multielectron transfer, safe operation, and high Coulombic efficiencies. Benefiting from the increased electronic conductivity of the partially reduced phase and its robust crystal structure with a large interlayer spacing, PR-TNO shows fast electron and Li+ transport, small volume change associated with Li+ storage, and notable capacitive behavior, resulting in good electrochemical performance even at very low temperatures. At -20 °C, a large reversible capacity of 313 mAh g-1 is obtained at 0.1C, reaching 83.3% of that at 25 °C. At 5C, high rate capability (58.3% of that at 0.5C) is achieved, only slightly lower than that at 25 °C (60.7%). Furthermore, PR-TNO demonstrates excellent cyclic stability with 99.2% of the initial capacity after 1680 cycles, confirming its excellent suitability for low-temperature LIBs." @default.
- W4200089760 created "2021-12-31" @default.
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- W4200089760 date "2021-12-19" @default.
- W4200089760 modified "2023-10-16" @default.
- W4200089760 title "Partially Reduced Titanium Niobium Oxide: A High‐Performance Lithium‐Storage Material in a Broad Temperature Range" @default.
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- W4200089760 doi "https://doi.org/10.1002/advs.202105119" @default.
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