Robust interphase on both anode and cathode enables stable aqueous lithium-ion battery with coulombic efficiency exceeding 99%

被引：19

作者：

Huang, Yunfu ^{[1
]}

Sun, Wenlu ^{[1
]}

Xu, Kui ^{[2
,3
]}

Zhang, Jiansheng ^{[4
]}

Zhang, Hui ^{[5
]}

Li, Jinlin ^{[1
]}

He, Liwen ^{[1
]}

Cai, Lifeng ^{[6
]}

Fu, Fang ^{[1
]}

Qin, Jiaqian ^{[7
]}

Chen, Hongwei ^{[1
,8
]}

机构：

[1] Huaqiao Univ, Dept Mat Sci & Engn, Xiamen 361021, Peoples R China

[2] Nanjing Univ Technol, Jiangsu Natl Synerget Innovat Ctr Adv Mat, Key Lab Flexible Elect, Nanjing 211816, Peoples R China

[3] Nanjing Univ Technol, Jiangsu Natl Synerget Innovat Ctr Adv Mat, Inst Adv Mat, Nanjing 211816, Peoples R China

[4] Qingdao Univ, Coll Mat Sci & Engn, Inst Mat Energy & Environm, Qingdao 266071, Peoples R China

[5] Ningxia Univ, Natl Key Lab High Efficiency Utilizat Coal & Gree, Yinchuan 750021, Ningxia, Peoples R China

[6] Putian Univ, Fujian Prov Key Lab Ecol Toxicol Effects & Contro, Coll Environm & Biol Engn, Putian 351100, Peoples R China

[7] Chulalongkorn Univ, Met & Mat Sci Res Inst, Ctr Excellence Respons Wearable Mat, Bangkok 10330, Thailand

[8] Huaqiao Univ, Coll Mat Sci & Engn, Dept Xiamen Key Lab Optoelect Mat & Adv Mfg, Xiamen 361021, Peoples R China

来源：

ENERGY STORAGE MATERIALS | 2022年 / 46卷

关键词：

Aqueous battery; Li-ion battery; Water-in-salt " electrolyte; High coulombic efficiency; Interface; METAL ANODES; LI; ELECTROLYTES; STABILITY;

D O I：

10.1016/j.ensm.2022.01.048

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Recent breakthroughs in "water-in-salt " electrolyte (WiSE) made highly-safe aqueous Li-ion batteries (LIBs) possible. However, long-term cycling stability of the WiSE-based LIBs is limited by the Coulombic efficiency (CE) of only 97-98% at low current density. Achieving a CE closer to unity (1.0) is thus highly desirable and also a critical challenge due to the unfavorable splitting of water at the electrolyte/electrode interfaces. Here we report a urea-containing-WiSE that enables the aqueous LIBs with a high CE of 99.1% at low rate of 0.15 C, higher than typical WiSE-based LIBs operated at similar low current density. Robust water-resistant interphases with organic inorganic hybrid amorphous microstructure were grown on both anode and cathode, which are responsible for the high CE in low rate. Such advanced interfacial chemistry with functional additives may open the way for designing cheaper but more durable aqueous batteries.

引用

页码：577 / 582

页数：6

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