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Carbonate deprotonation on Ni-rich layered cathode: Development of a new cis–trans isomerism oligomer as an organic coverage
富鎳層狀正極材料的碳酸鹽脫質子反應:開發新型順式異構寡聚物有機覆蓋層


L. Merinda, F. M. Wang*, N. L. Wu*, U. Qonita, W. H. Huang, L. Tiong, C. K. Chang, P. H. Hsu, C. W. Pao, J. L. Chen, C. L. Chen, T. S. Chan
https://doi.org/10.1039/D4TA05197A
SEED Member: F.M. Wang

 
 

Major Contributions

1. Demonstrated a comprehensive understanding of carbonate solvent deprotonation mechanisms on Ni-rich cathode surfaces through operando FTIR spectroscopy, revealing the detailed reaction pathways of both EC and EMC decomposition at different states of charge.

2. Developed a novel cis-isomerism (CI) oligomer coating that effectively mitigates carbonate decomposition by creating a bridge function between the cathode surface and electrolyte, significantly reducing the formation of decomposition products and improving battery performance.

3. Established the relationship between Li+ solvation behavior and carbonate decomposition, showing how the CI coating modifies the solvation patterns to suppress undesirable reactions while maintaining efficient Li+ transport.


主要貢獻

1. 透過原位傅立葉轉換紅外光譜技術,全面解析了富鎳正極表面的碳酸鹽溶劑脫質子機理,揭示了環狀碳酸乙烯酯(EC)和線性碳酸乙基甲酯(EMC)在不同充電狀態下的詳細分解反應路徑。

2. 開發了一種新型順式異構(CI)寡聚物塗層,通過在正極表面和電解液之間建立橋接功能,有效抑制碳酸鹽分解,顯著減少分解產物的形成並提升電池性能。

3. 建立了鋰離子溶劑化行為與碳酸鹽分解之間的關係,闡明了CI塗層如何調節溶劑化模式以抑制不良反應,同時維持高效的鋰離子傳輸。