期刊
ADVANCED ENERGY AND SUSTAINABILITY RESEARCH
卷 3, 期 1, 页码 -出版社
WILEY
DOI: 10.1002/aesr.202100165
关键词
biopolymers; lignin; organic battery; polymer batteries; polymer electrolytes; self-discharge; water in salt
资金
- Proof-of-Concept project Paper Batteries - Knut and Alice Wallenberg (KAW) foundation
- high-voltage aqueous electrolytes - Knut and Alice Wallenberg (KAW) foundation
- Wood Wallenberg Science Center - Knut and Alice Wallenberg (KAW) foundation
- Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [2009-00971]
- Wallenberg Scholar grants from KAW
In electrochemical energy storage devices, the use of organic electrolytes presents challenges while water-based electrolytes have issues with self-discharge. Highly concentrated polymer electrolytes have been found to solve the self-discharge issue in organic electrolytes.
In electrochemical energy storage devices (ESDs), organic electrolytes are typically used for wide operational potential window, yet they suffer with cost, environmental, flammability issues, and low ionic conductivity when compared with water-based electrolytes. Hence, for large-scale applications that require high power and safety, presently there is no true solution. Though water-based electrolytes have higher ionic conductivities, and are cost-effective and nonflammable, their high self-discharge rate with organic/carbon-based electrodes impedes their commercialization. It is found out that highly concentrated polymer electrolytes on the concept of water-in-salt electrolyte lead to extremely low leakage current within the electrochemical stability window (ESW) of water, thus solving the issue of self-discharge in organic/carbon-based ESDs. Herein, potassium polyacrylate (PAAK) is prepared as water-in-polymer salt electrolyte (WIPSE) and tested for one of most abundant wood-based biopolymer lignin and polyimide as positive and negative electrodes, respectively, in both half-cell and full-cell. The device shows an open-circuit voltage drops <0.45V in 100h setting a record for organic batteries using aqueous electrolyte. The high ionic conductivity (40-120mScm(-1)) nonflammability of PAAK with high ESW (3.1V) opens a new direction for truly safe, sustainable, and high power (6.8kWkg(-1)) organic ESD manufactured by printing technologies.
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