Journal
NANO ENERGY
Volume 18, Issue -, Pages 205-211Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2015.10.015
Keywords
Potassium-ion batteries; PTCDA; High capacity; Non-aqueous; Organic electrode
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Funding
- Maryland NanoCenter
- NispLab
- China Scholarship Council (CSC)
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Potassium-ion (K-ion) batteries can be an attractive alternative for grid-scale energy storage due to the abundance of K resources. For the first time, we designed and fabricated a non-aqueous K-ion battery (KIB) by employing 3,4,9,10-perylene-tetracarboxylicacid-dianhydride (PTCDA) as the cathode. The PTCDA electrode exhibits a high capacity of 131 mA h g(-1) in the potential range of 1.5-3.5 V vs. K/K+, which corresponds to the insertion of two K ions per PTCDA molecule. The PTCDA cathode also shows great cycling performance, with a capacity retention of 66.1% over 200 cycles. Furthermore, K(11)PTCDA can be obtained when discharging PTCDA to 0.01 V vs. K/K+, which delivers a high capacity of 753 mA h g(-1). The excellent electrochemical performance makes PTCDA a promising organic electrode based on K-ion chemistry for grid-scale energy storage. Published by Elsevier Ltd.
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