Regulating the Solvation Structure of Potassium Ions Using a Multidentate Ether in Potassium Metal Batteries

被引：7

作者：

Chen, Chao ^{[4
,5
]}

Zhou, Ji ^{[4
,5
]}

Gong, Wenbin ^{[6
]}

Fan, Xueying ^{[4
,5
]}

Meng, Xiaodong ^{[4
,5
]}

Chen, Shang ^{[4
,5
]}

Sun, Longhua ^{[4
,5
]}

Meng, Yongqiang ^{[4
,5
]}

Tao, Kangjia ^{[4
,5
]}

Ulgu, Burak ^{[7
]}

Sun, Pingchuan ^{[8
,9
,10
]}

Bielawski, Christopher W. ^{[11
,12
]}

Geng, Jianxin ^{[1
,2
,3
]}

机构：

[1] Tiangong Univ, State Key Lab Separat Membranes & Membrane Proc, Tianjin 300387, Peoples R China

[2] Tiangong Univ, Tianjin Key Lab Adv Fibers & Energy Storage, Tianjin 300387, Peoples R China

[3] Tiangong Univ, Sch Mat Sci & Engn, Tianjin 300387, Peoples R China

[4] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China

[5] Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, Beijing 100029, Peoples R China

[6] Xuzhou Univ Technol, Sch Phys & Energy, Xuzhou 221018, Peoples R China

[7] Bilkent Univ, Fac Sci, Dept Chem, TR-06800 Ankara, Turkey

[8] Nankai Univ, Coll Chem, Key Lab Funct Polymer Mat Minist Educ, State Key Lab Med Chem Biol, Tianjin 300071, Peoples R China

[9] Nankai Univ, Coll Chem, Tianjin 300071, Peoples R China

[10] Nankai Univ, State Key Lab Med Chem Biol, Tianjin 300071, Peoples R China

[11] Inst Basic Sci IBS, Ctr Multidimens Carbon Mat CMCM, Ulsan 44919, South Korea

[12] Ulsan Natl Inst Sci & Technol UNIST, Dept Chem, Ulsan 44919, South Korea

来源：

ACS APPLIED ENERGY MATERIALS | 2022年 / 5卷 / 09期

基金：

中国国家自然科学基金;

关键词：

ether-based electrolytes; multidentate solvents; solvation structures; potassium metal anode; dendrite-free metal anode; ELECTROLYTE; CARBONATE; ANODE; LI;

D O I：

10.1021/acsaem.2c01504

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：

Potassium (K) is regarded as an alternative to lithium (Li) for use in contemporary energy storage devices owing to its high abundance and low electrochemical potential. However, because K ions are larger than Li ions, they exhibit different solvation properties that can ultimately affect device performance. Herein, a multidentate ether-based electrolyte is demonstrated to effectively solvate K ions and the solvation structures can be further modulated with cosolvents. The use of the multidentate ether-based electrolyte also suppresses the formation of K dendrites and significantly enhances the cycling stability of K//K symmetric cells (e.g., over 2000 h at 0.25 mA cm(-2)).

引用

页码：10366 / 10374

页数：9

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