Strategy to enhance the electrochemical performance of silicon oxycarbide as anodes in sodium-ion batteries

被引：10

作者：

Chandra, Christian ^{[1
]}

Devina, Winda ^{[2
]}

Sarofil, Anith Dzhanxinah Mohd ^{[2
]}

Kim, Jaehoon ^{[1
,2
,3
]}

机构：

[1] Sungkyunkwan Univ, Sch Mech Engn, 2066 Seobu Ro, Suwon 16419, Gyeonggi Do, South Korea

[2] Sungkyunkwan Univ, SKKU Adv Inst Nanotechnol SAINT, 2066 Seobu Ro, Suwon 16419, Gyeonggi Do, South Korea

[3] Sungkyunkwan Univ, Sch Chem Engn, 2066 Seobu Ro, Suwon 16419, Gyeonggi Do, South Korea

来源：

CHEMICAL ENGINEERING JOURNAL | 2022年 / 438卷

基金：

新加坡国家研究基金会;

关键词：

Silicon oxycarbide; Sodium-ion batteries; Ether-based electrolyte; Diglyme; Sodium trifluoromethane sulfonate; ETHER-BASED ELECTROLYTE; LONG CYCLE LIFE; HARD CARBON; RATE CAPABILITY; MICROSIZED SN; STORAGE; GRAPHITE; INTERCALATION; MECHANISM; OIL;

D O I：

10.1016/j.cej.2022.135411

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Na+-ion storage capacity of silicon oxycarbides (SiOCs) can be enhanced by incorporating an ether-based electrolyte. Nonporous SiOC micron-sized particles in a sodium trifluoromethane sulfonate-diglyme electrolyte exhibit a more enhanced storage capacity (287 mAh g(-1)) in addition to a small capacity decay (0.002%) after 10,000 cycles. On applying a constant current constant voltage (CCCV) mode, the capacity increased to 322 mAh g(-1) diglyme-based ether electrolyte produced an ultrathin and inorganic-based solid electrolyte layer on the electrode surface. This reduces cell overpotential and volume expansion of the electrode. This study provides a rational strategy to design high-performance NIB cells.

引用

页数：12

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