title: Understanding the Size-Dependent Sodium Storage Properties of Na2C6O6-Based Organic Electrodes for Sodium-Ion Batteries.
abstract: Organic electroactive materials represent a new generation of sustainable energy storage technology due to their unique features including environmental benignity, material sustainability, and highly tailorable properties. Here a carbonyl-based organic salt Na2C6O6, sodium rhodizonate (SR) dibasic, is systematically investigated for high-performance sodium-ion batteries. A combination of structural control, electrochemical analysis, and computational simulation show that rational morphological control can lead to significantly improved sodium storage performance. A facile antisolvent method was developed to synthesize microbulk, microrod, and nanorod structured SRs, which exhibit strong size-dependent sodium ion storage properties. The SR nanorod exhibited the best performance to deliver a reversible capacity of ∼190 mA h g(-1) at 0.1 C with over 90% retention after 100 cycles. At a high rate of 10 C, 50% of the capacity can be obtained due to enhanced reaction kinetics, and such high electrochemical activity maintains even at 80 °C. These results demonstrate a generic design route toward high-performance organic-based electrode materials for beyond Li-ion batteries. Using such a biomass-derived organic electrode material enables access to sustainable energy storage devices with low cost, high electrochemical performance and thermal stability.
authors.affiliation: Materials Science and Engineering Program and Department of Mechanical Engineering, The University of Texas at Austin , Austin, Texas 78712, United States.|Collaborative Innovation Center of Advanced Microstructures, School of Electronic Science and Engineering, Nanjing University , Nanjing 210093, China.
authors.forename: Yaqun
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Materials Science and Engineering Program and Department of Mechanical Engineering, The University of Texas at Austin , Austin, Texas 78712, United States.
authors.forename: Yu
authors.initials: Y
authors.lastname: Ding
authors.affiliation: Collaborative Innovation Center of Advanced Microstructures, School of Electronic Science and Engineering, Nanjing University , Nanjing 210093, China.
authors.forename: Lijia
authors.initials: L
authors.lastname: Pan
authors.affiliation: Materials Science and Engineering Program and Department of Mechanical Engineering, The University of Texas at Austin , Austin, Texas 78712, United States.
authors.forename: Ye
authors.initials: Y
authors.lastname: Shi
authors.affiliation: Collaborative Innovation Center of Advanced Microstructures, School of Electronic Science and Engineering, Nanjing University , Nanjing 210093, China.
authors.forename: Zhuanghao
authors.initials: Z
authors.lastname: Yue
authors.affiliation: Collaborative Innovation Center of Advanced Microstructures, School of Electronic Science and Engineering, Nanjing University , Nanjing 210093, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Shi
authors.affiliation: Materials Science and Engineering Program and Department of Mechanical Engineering, The University of Texas at Austin , Austin, Texas 78712, United States.
authors.forename: Guihua
authors.initials: G
authors.lastname: Yu
keywords: Energy storage; nanostructure; sodium rhodizonate; sodium-ion battery; sustainable materials