Potassium salts of para-aromatic dicarboxylates as the highly efficient organic anodes for low-cost K-ion batteries

By Qijiu Deng, Jingfang Pei, Cong Fan, Jing Ma, Bei Cao, C. Li, Ying Jin, Liping Wang, Jingze Li. 2017

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Abstract Two small organic molecules, namely potassium terephthalate (K 2 TP) and potassium 2,5-pyridinedicarboxylate (K 2 PC), were newly exploited as the highly efficient organic anodes in K-ion batteries. Both K 2 TP and K 2 PC exhibited the clear and reversible discharge and charge platforms in K-ion half cells, which were resulted from the redox behavior of organic para -aromatic dicarboxylates. The satisfactory and reversible specific capacities were realized in the K 2 TP- and K 2 PC-based K-ion cells, with average values of 181 and 190 mAh g −1 for 100 cycles, respectively. The currently-obtained achievement of organic anodes could make a forward step for the further development of rocking-chair K-ion batteries.

Subfields: Automotive Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/c11c6b0047f7940de44e50ae6824c0197bfcf460