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- W4210678551 abstract "Abstract Lithium‐rich layered oxides (LRLO) have attracted great interest for high‐energy Li‐ion batteries due to their high theoretical capacity. However, capacity decay and voltage fade during the cycling impede the practical application of LRLO. Herein, the use of lithium bis‐(oxalate)borate (LiBOB) as an electrolyte additive is reported to improve the cycling stability in high voltage LRLO/graphite full cells. The cell with LiBOB‐containing electrolyte delivers 248 mAh g −1 initial capacity and shows no capacity decay after 70 cycles as well as 95.5% retention after 150 cycles over 4.5 V cycling. A systematic mechanism study for the LiBOB‐enabled cycling performance improvement is conducted. Analytical electron microscopy under cryo‐condition confirms the formation of a uniform interphase and less phase transformation on the LRLO particle, accompanied by less voltage decay in the cathode. The formation of B‐F species is identified in the cycled electrolyte, elucidating the HF scavenger effect of LiBOB. Due to less HF corrosion on both electrode interphases, a reduced amount of transition metal dissolution and redeposition on the graphite is proved, thereby mitigating the capacity decay in LRLO/graphite full cells. These findings suggest that the borate additive is a promising strategy to optimize high voltage electrolyte for the industrialization of LRLO." @default.
- W4210678551 created "2022-02-08" @default.
- W4210678551 creator A5005085942 @default.
- W4210678551 creator A5012581046 @default.
- W4210678551 creator A5047609909 @default.
- W4210678551 creator A5062599484 @default.
- W4210678551 creator A5068408522 @default.
- W4210678551 creator A5077985811 @default.
- W4210678551 creator A5081791457 @default.
- W4210678551 creator A5087291851 @default.
- W4210678551 creator A5089795720 @default.
- W4210678551 date "2022-01-29" @default.
- W4210678551 modified "2023-10-14" @default.
- W4210678551 title "Elucidating the Effect of Borate Additive in High‐Voltage Electrolyte for Li‐Rich Layered Oxide Materials" @default.
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