Conjugated Dicarboxylate with Extended Naphthyl Skeleton as an Advanced Organic Anode for Potassium-Ion Battery. Issue 3 (21st December 2018)

• Record Type: Journal Article
• Authors: Li, Chao; Xue, Jing; Ma, Jing; Li, Jingze
• Is Part Of: Journal of the Electrochemical Society. Volume 166:Issue 3(2019)
• Page Start: A5221
• Page End: A5225
• Publication Date: 2018-12-21
• Subjects: Batteries -- Conjugated Dicarboxylate -- Naphthyl -- Potassium-ion battery; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0351903jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Organic compounds have attracted great attention as the promising electrode materials for potassium-ion batteries. Here, a conjugated dicarboxylate derivative, potassium naphthalene-2, 6-dicarboxylate (K2 NDC), based on aromatic naphthyl skeleton, is applied as advanced organic anode for K + storage and release efficiently. Since the dicarboxylate group is the electrochemically active site, K2 NDC exhibits two-electron redox mechanism. Meanwhile, a relatively low redox potential of ∼0.55 V vs . K + /K is achieved, partly due to the extended conjugation structure of the naphthyl ligand. K2 NDC delivers a high average specific capacity of 139 mAh g −1 at 100 mA g −1 with the capacity retention of 93% after 300 cycles.