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- W2897551881 abstract "It is a great challenge to engineer thick or bulk electrodes with well-maintained rate performance, since their charge-transport kinetics are severely worsened at large current densities. Here, high-power thick cathode of Li-ion batteries has been built based on mesoporous lithium vanadium phosphate interweaved with carbon nanotube nest. A facile yet effective synthesis method based on aerosol-assisted spray process followed with high-temperature calcination has been developed to synthesize such nanocomposite. During spraying process, high-aspect-ratio carbon nanotubes are interweaved into lithium vanadium phosphate and form long-range conductive nest. This structure provides efficient charge transport for the active material, even in their thick electrodes. To verify this, 30 and 160 μm binder-free electrodes have been fabricated. The results show that the 160 μm electrode can reach comparable rate performance to that of 30 μm from the rate of 0.2–10 C. The discharge capacities at 10 C for 30 and 160 μm electrodes are 130 and 122 mAh g–1, respectively, which are 98% and 92% of theoretical capacity of lithium vanadium phosphate. Also, a capacity retention over 96% is still retained after 1000 cycles at 20 C, exhibiting good cycling stability. Hence, the designed nanocomposite is promising for fast charging/discharging of batteries. The synthetic method is scalable, and can be used for synthesis of other electrochemical active materials." @default.
- W2897551881 created "2018-10-26" @default.
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- W2897551881 date "2018-10-13" @default.
- W2897551881 modified "2023-10-12" @default.
- W2897551881 title "Approaching Theoretical Capacities in Thick Lithium Vanadium Phosphate Electrodes at High Charge/Discharge Rates" @default.
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- W2897551881 doi "https://doi.org/10.1021/acssuschemeng.8b04056" @default.
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