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Effect of Silyl Ether-functinoalized Dimethoxydimethylsilane on Electrochemical Performance of a Ni-rich NCM Cathode

Effect of Silyl Ether-functinoalized Dimethoxydimethylsilane on Electrochemical Performance of a Ni-rich NCM Cathode

Seol Heui Jang, Taeeun Yim

Chemphyschem. 2017 Dec 6;18(23):3402-3406.

PMID: 28901033

Abstract:

Dimethoxydimethylsilane (DODSi) is used as an interface stabilizing additive through a selective HF scavenging reaction for layered Ni-rich oxide cathodes. Ex situ NMR analyses demonstrated that DODSi effectively removes HF from the electrolyte based on the matched chemical reactivity of Si with F- and O with H+ . The cells employing DODSi exhibit higher specific capacity with retention than those cycled with a DODSi-free electrolyte even under in situ HF generating conditions. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and inductively coupled plasma-mass spectroscopy (ICP-MS) analyses indicate that DODSi effectively protects the Ni-rich oxide cathodes against HF corrosion, resulting in improved surface stability of Ni-rich cathodes.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP1112396	Dimethoxydimethylsilane		1112-39-6	Price

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