Electrolyte design for lithium-ion batteries with a cobalt-free cathode and silicon oxide anode

被引：68

作者：

Ko, Seongjae ^{[1
]}

Han, Xiao ^{[1
]}

Shimada, Tatau ^{[1
]}

Takenaka, Norio ^{[1
]}

Yamada, Yuki ^{[1
]}

Yamada, Atsuo ^{[1
,2
]}

机构：

[1] Univ Tokyo, Dept Chem Syst Engn, Tokyo, Japan

[2] Sungkyunkwan Univ, Sungkyunkwan Univ Inst Energy Sci & Technol SIEST, Suwon, South Korea

来源：

NATURE SUSTAINABILITY | 2023年 / 6卷 / 12期

基金：

日本学术振兴会; 日本科学技术振兴机构;

关键词：

FLUORINATED ELECTROLYTES; STABILITY; MECHANISM; SOLVENTS; METAL; ELECTROCHEMISTRY; INTERPHASE; REDUCTION; SOLVATION; FERROCENE;

D O I：

10.1038/s41893-023-01237-y

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Lithium-ion batteries (LIBs) to power electric vehicles play an increasingly important role in the transition to a carbon neutral transportation system. However, at present the chemistry of LIBs requires, among other elements, cobalt (Co), which will probably become scarce over time in addition to posing supply chain risks related to its single source, human rights and mining practices. To address this problem, we construct a LIB pairing a Co-free cathode with a silicon suboxide (SiOx) anode that possesses a high cut-off voltage of 4.9 V and sustains unprecedented 1,000 cycles. Underlying this favourable electrode combination is a rational electrolyte design based on 3.4 M LiFSI/FEMC featuring a shifted potential, which serves to aid formation of robust passivation layers on the anode and promote electrolyte stability against both reductive and oxidative degradations. Our electrolyte formulation offers a pathway towards both sustainable and high-performing LIBs, while the concept could be applied to other electrochemical energy technologies.

引用

页码：1705 / 1714

页数：10

共 70 条

[51] Review on modeling of the anode solid electrolyte interphase (SEI) for lithium-ion batteries [J].