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Tailoring Low-Temperature Performance of a Lithium-Ion Battery via Rational Designing Interphase on an Anode

Tailoring Low-Temperature Performance of a Lithium-Ion Battery via Rational Designing Interphase on an Anode

Rude Guo, Yanxia Che, Guangyuan Lan, Jianlian Lan, Jianhui Li, Lidan Xing, K Xu, Weizhen Fan, Le Yu, Weishan Li

ACS Appl Mater Interfaces. 2019 Oct 16;11(41):38285-38293.

PMID: 31553154

Abstract:

Performances of lithium-ion batteries at subambient temperatures are extremely restricted by the resistive interphases originated from electrolyte decomposition, especially on the anode surface. This work reports a novel strategy that an anode interphase of low impedance is constructed by applying an electrolyte additive dimethyl sulfite (DMS). Electrochemical measurements indicate that the as-constructed interphase provides graphite/LiNi0.5Co0.2Mn0.3O2 pouch cells with excellent low-temperature performance, outperforming the interphase constructed by 1,3,2-dioxathiolane 2,2-dioxide (DTD), a common commercially used electrolyte additive. Spectral characterizations in combination with theoretical calculations demonstrate that the improved performance is attributed to the unique molecular structure of DMS, which presents appropriate reduction activity and constructs the more stable and ionically conductive anode interphase due to the weaker combination of its reduction product with lithium ions than DTD. This rational design of interphases via an additive structure has been proven to be a low cost but rather an effective approach to tailor the performances of lithium-ion batteries.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP616422	Dimethyl sulfite		616-42-2	Price

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