Journal
CARBON
Volume 179, Issue -, Pages 60-67Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2021.03.058
Keywords
Potassium ion battery; Hard carbon; Ether electrolyte; Ester electrolyte; SEI
Funding
- National Natural Science Foundation of China [51772147, 51502137, U1601214, 51425301]
- National Materials Genome Project [2016YFB0700600]
- Jiangsu Distinguished Professorship Program (2016)
- Postgraduate Research & Practice Innovation Program of Jiangsu Province, China [KYCX18_1128, SJCX19_0218]
- Research Foundation of State Key Lab of China [ZK201906, ZK201805]
Ask authors/readers for more resources
The study investigated the potassium storage behavior of hard carbon prepared with corn cob as precursor in both ester and ether electrolytes. It showed that the hard carbon exhibited superior potassium storage performance in ether electrolyte compared to ester electrolyte, attributed to larger capacitive storage contribution and favorable solid electrolyte interphase (SEI) film. This research contributes to a better understanding of alkaline metal storage mechanisms in carbon materials with different electrolytes.
Hard carbon is a promising anode material for potassium ion batteries, because of its abundant resource, low price and excellent electrochemical performance. Electrolyte, plays important role in determining the storage performance of electrode materials for alkaline metal based batteries, yet there is no report on how the solvents of the electrolyte impacts the potassium storage behavior of hard carbon. In this study, hard carbon prepared with corn cob as precursor (denoted as CCHC) was investigated in both ester and ether electrolytes. CCHC exhibits superior potassium storage performance in ether electrolyte than in ester electrolyte, in terms of capacity, rate and cycle performance. CCHC electrode presents different galvanostatic charge-discharge and CV profiles in ether and ester electrolytes. Kinetic studies and X-ray photoelectron spectra analyses suggest that the superior potassium storage behavior of CCHC in ether electrolyte would be attributed to larger capacitive storage contribution, favorable solid electrolyte interphase (SEI) film. This study would benefit to explore the potassium storage feasibility of hard carbon and achieve better understanding of alkaline metal storage mechanisms in carbon materials with different electrolytes. (C) 2021 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available