Molecular crowding agents engineered to make bioinspired electrolytes for high-voltage aqueous supercapacitors

Peng Mengke; Wang Li; Li Longbin; Peng Zhongyou; Tang Xiannong; Hu Ting; Yuan Kai; Chen Yiwang

doi:10.1016/j.esci.2021.09.004

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May 2021

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Peng Mengke, Wang Li, Li Longbin, Peng Zhongyou, Tang Xiannong, Hu Ting, Yuan Kai, Chen Yiwang. Molecular crowding agents engineered to make bioinspired electrolytes for high-voltage aqueous supercapacitors[J]. eScience, 2021, 1(1): 83-90. doi: 10.1016/j.esci.2021.09.004

Citation:

Peng Mengke, Wang Li, Li Longbin, Peng Zhongyou, Tang Xiannong, Hu Ting, Yuan Kai, Chen Yiwang. Molecular crowding agents engineered to make bioinspired electrolytes for high-voltage aqueous supercapacitors[J]. eScience, 2021, 1(1): 83-90. doi: 10.1016/j.esci.2021.09.004

Citation:

Peng Mengke, Wang Li, Li Longbin, Peng Zhongyou, Tang Xiannong, Hu Ting, Yuan Kai, Chen Yiwang. Molecular crowding agents engineered to make bioinspired electrolytes for high-voltage aqueous supercapacitors[J]. eScience, 2021, 1(1): 83-90. doi: 10.1016/j.esci.2021.09.004

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Molecular crowding agents engineered to make bioinspired electrolytes for high-voltage aqueous supercapacitors

doi: 10.1016/j.esci.2021.09.004

a.
College of Chemistry/Institute of Polymers and Energy Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang, 330031, China
b.
Institute of Advanced Scientific Research (iASR), Key Laboratory of Functional Small Molecules for Ministry of Education, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, 330022, China

More Information

Corresponding author: E-mail addresses: kai.yuan@ncu.edu.cn (K. Yuan); E-mail addresses: ywchen@ncu.edu.cn (Y. Chen)
Received Date: 2021-07-09
Revised Date: 2021-08-27
Accepted Date: 2021-09-27

Available Online: 2021-09-29

Abstract

Abstract

The development of low-cost and eco-friendly aqueous electrolytes with a wide voltage window is the key to achieving safe high energy density supercapacitors (SCs). In this work, a molecular crowding electrolyte is prepared by simulating the crowded environment in living cells. Ion transport in the molecular crowding electrolyte can be effectively improved via reducing the molecular weight of the crowding agent, polyethylene glycol (PEG). The results show that PEG with a molecular weight of 200 (PEG200) can significantly improve ionic conductivity while maintaining a wide voltage window. These advantages enable commercial activated carbon-based SCs to work at 2.5 V with high energy density, outstanding rate performance and good stability for more than 10, 000 cycles. On this basis, three series of molecular crowding electrolytes using sodium perchlorate, lithium perchlorate, and sodium trifluoromethanesulfonate as salts are developed, demonstrating the versatility of PEG200 for wide-voltage aqueous electrolytes.
- Supercapacitor,
- Electrolytes,
- Molecular weight,
- Ionic conductivity,
- Electrochemical energy storage

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References(49)

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