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Uric acid as an electrochemically active compound for sodium-ion batteries: Stepwise Na+-storage mechanisms of π-conjugation and stabilized carbon anion
Ma, Chao1; Zhao, Xiaolin2; Harris, Michelle M.1; Liu, Jianjun2; Wang, Kai-Xue1; Chen, Jie-Sheng1
2017
发表期刊ACS Applied Materials and Interfaces
ISSN19448244
卷号9期号:39页码:33934-33940
摘要Developing efficient sodium-ion-storage mechanisms to increase the energy capacity in organic electrodes is a critical issue even after this period of prolonged effort. Uric acid (UA), a simple organic compound with three carbonyl groups is demonstrated to be electrochemically active in the insertion/extraction of Na ions. Theoretical calculations and experimental characterizations reveal that the sodium-ion storage by UA is a result of the stepwise mechanisms of p-π conjugation and the carbon anion. Aside from C=O, the functional group C= C(NH-)2also provides an efficient Na-storage activated site in which the lone-pair electrons is stabilized through the planar-to-tetrahedral structural transition and low-energy orbital hybridization of N atoms. For further improvement of the electrochemical performance, a uric acid and carbon nanotube (UA@ CNT) composite is prepared via a vacuum solution impregnation method. When employed as an anode material for sodium-ion batteries, the UA@CNT composite exhibits high specific capacity, excellent rate capability, and long cycling life even at high current densities. A reversible capacity of over 163 mA h g-1is maintained even after 150 cycles at a current density of 200 mA g-1. The present study paves a way to develop reversible high-capacity organic electrode materials for sodium-ion batteries by a carbon-anion stabilization mechanism. © 2017 American Chemical Society.
DOI10.1021/acsami.7b10165
EI入藏号20174504362422
EI主题词Sodium-ion batteries
EI分类号525.2 Energy Conservation - 531.1 Metallurgy - 694.4 Storage - 714.1 Electron Tubes - 761 Nanotechnology - 804.1 Organic Compounds - 819.4 Fiber Products - 951 Materials Science
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sic.ac.cn/handle/331005/25681
专题中国科学院上海硅酸盐研究所
作者单位1.Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai; 200240, China;
2.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai; 200050, China
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GB/T 7714
Ma, Chao,Zhao, Xiaolin,Harris, Michelle M.,et al. Uric acid as an electrochemically active compound for sodium-ion batteries: Stepwise Na+-storage mechanisms of π-conjugation and stabilized carbon anion[J]. ACS Applied Materials and Interfaces,2017,9(39):33934-33940.
APA Ma, Chao,Zhao, Xiaolin,Harris, Michelle M.,Liu, Jianjun,Wang, Kai-Xue,&Chen, Jie-Sheng.(2017).Uric acid as an electrochemically active compound for sodium-ion batteries: Stepwise Na+-storage mechanisms of π-conjugation and stabilized carbon anion.ACS Applied Materials and Interfaces,9(39),33934-33940.
MLA Ma, Chao,et al."Uric acid as an electrochemically active compound for sodium-ion batteries: Stepwise Na+-storage mechanisms of π-conjugation and stabilized carbon anion".ACS Applied Materials and Interfaces 9.39(2017):33934-33940.
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