Organic electrode for non-aqueous potassium-ion batteries. (November 2015)

• Record Type: Journal Article
• Authors: Chen, Yanan; Luo, Wei; Carter, Marcus; Zhou, Lihui; Dai, Jiaqi; Fu, Kun; Lacey, Steven; Li, Tian; Wan, Jiayu; Han, Xiaogang; Bao, Yanping; Hu, Liangbing
• Is Part Of: Nano energy. Volume 18(2015:Nov.)
• Page Start: 205
• Page End: 211
• Publication Date: 2015-11
• Subjects: Potassium-ion batteries -- PTCDA -- High capacity -- Non-aqueous -- Organic electrode; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2015.10.015
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: 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, K11 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. Graphical abstract: Highlights: For the first time, we designed and fabricated a non-aqueous potassium-ion batteries (KIBs) by PTCDA as the cathode. The PTCDA exhibits a high capacity of 131 mA h g −1 in the potential range of 1.5–3.5 V vs. K/K + . PTCDA shows great capacity retention of 66.1% over 200 cycles. K11 PTCDA can be obtained when discharging PTCDA to low voltage.