A 62 m K-ion aqueous electrolyte

被引：55

作者：

Ko, Seongjae ^{[1
]}

Yamada, Yuki ^{[1
,2
]}

Yamada, Atsuo ^{[1
,2
]}

机构：

[1] Univ Tokyo, Dept Chem Syst Engn, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan

[2] Kyoto Univ, Elements Strategy Initiat Catalysts & Batteries E, Nishikyo Ku, 1-30 Goryo Ohara, Kyoto 6158245, Japan

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2020年 / 116卷

关键词：

Aqueous batteries; Electrolytes; Hydrate melts; Potential window; Potassium; LITHIUM-ION; STABILITY; BATTERY; MECHANISM; RAMAN;

D O I：

10.1016/j.elecom.2020.106764

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Concentrated aqueous electrolytes have been widely explored for high-voltage aqueous batteries. To achieve higher voltage, even higher alkali-ion molalities are being pursuit up to 55.5 mol kg(-1) (m) that corresponds to monohydrate, but the sacrificially lowered ionic conductivity is problematic. Here we report a 61.7 m K-ion aqueous electrolyte composed of KN(SO2F)(2) (KFSI) and KSO3CF3 (KOTf). The pioneered beyond-monohydrate realm is unique to K-ion systems, in which [FSI](-) anion is stable to hydrolysis. The K-ion electrolyte has two-order higher ionic conductivity (12 mS cm(-1) at 30 degrees C) than a comparable 55.5 m Li-ion system (0.1 mS cm(-1)) while exhibiting a 2.7 V potential window on Pt being among the widest in all alkali-ion aqueous electrolytes. This work suggests the superior overall performance of aqueous K-ion batteries over other alkali-ion batteries.

引用

页数：5

共 28 条

[1] Hydrogen bonding and Raman, IR, and 2D-IR spectroscopy of dilute HOD in liquid D2O [J].

Auer, B. ;

Kumar, R. ;

Schmidt, J. R. ;

Skinner, J. L. .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2007, 104 (36) :14215-14220

[2] A 63 m Superconcentrated Aqueous Electrolyte for High-Energy Li-Ion Batteries [J].

Chen, Long ;

Zhang, Jiaxun ;

Li, Qin ;

Vatamanu, Jenel ;

Ji, Xiao ;

Pollard, Travis P. ;

Cui, Chunyu ;

Hou, Singyuk ;

Chen, Ji ;

Yang, Chongyin ;

Ma, Lin ;

Ding, Michael S. ;

Garaga, Mounesha ;

Greenbaum, Steve ;

Lee, Hung-Sui ;

Borodin, Oleg ;

Xu, Kang ;

Wang, Chunsheng .

ACS ENERGY LETTERS, 2020, 5 (03) :968-974

[3] KVPO4F and KVOPO4 toward 4 volt-class potassium-ion batteries [J].

Chihara, Kuniko ;

Katogi, Akihiro ;

Kubota, Kei ;

Komaba, Shinichi .

CHEMICAL COMMUNICATIONS, 2017, 53 (37) :5208-5211

[4] Electrochemical intercalation of lithium ion within graphite from propylene carbonate solutions [J].

Jeong, SK ;

Inaba, M ;

Iriyama, Y ;

Abe, T ;

Ogumi, Z .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2003, 6 (01) :A13-A15

[5] Building aqueous K-ion batteries for energy storage [J].

Jiang, Liwei ;

Lu, Yaxiang ;

Zhao, Chenglong ;

Liu, Lilu ;

Zhang, Jienan ;

Zhang, Qiangqiang ;

Shen, Xing ;

Zhao, Junmei ;

Yu, Xiqian ;

Li, Hong ;

Huang, Xuejie ;

Chen, Liquan ;

Hu, Yong-Sheng .

NATURE ENERGY, 2019, 4 (06) :495-503

[6] Electronic structure calculations on lithium battery electrolyte salts [J].

Johansson, Patrik .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2007, 9 (12) :1493-1498

[7] Formation of a Solid Electrolyte Interphase in Hydrate-Melt Electrolytes [J].

Ko, Seongjae ;

Yamada, Yuki ;

Yamada, Atsuo .

ACS APPLIED MATERIALS & INTERFACES, 2019, 11 (49) :45554-45560

[8] Lithium-salt monohydrate melt: A stable electrolyte for aqueous lithium-ion batteries [J].

Ko, Seongjae ;

Yamada, Yuki ;

Miyazaki, Kasumi ;

Shimada, Tatau ;

Watanabe, Eriko ;

Tateyama, Yoshitaka ;

Kamiya, Takeshi ;

Honda, Tsunetoshi ;

Akikusa, Jun ;

Yamada, Atsuo .

ELECTROCHEMISTRY COMMUNICATIONS, 2019, 104

[9] A High-Voltage Aqueous Electrolyte for Sodium-Ion Batteries [J].

Kuehnel, Ruben-Simon ;

Reber, David ;

Battaglia, Corsin .

ACS ENERGY LETTERS, 2017, 2 (09) :2005-2006

[10] RECHARGEABLE LITHIUM BATTERIES WITH AQUEOUS-ELECTROLYTES [J].

LI, W ;

DAHN, JR ;

WAINWRIGHT, DS .

SCIENCE, 1994, 264 (5162) :1115-1118

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