Atomic Layer Coated Al2O3 on Nitrogen Doped Vertical Graphene Nanosheets for High Performance Sodium Ion Batteries

被引:31
作者
Wu, Zhiheng [1 ,2 ]
Zhang, Xiangdan [1 ,2 ]
Deng, Lijun [3 ]
Zhang, Yongshang [1 ,2 ]
Wang, Zhuo [1 ,2 ]
Shen, Yonglong [1 ,2 ]
Shao, Guosheng [1 ,2 ]
机构
[1] Zhengzhou Univ, Sch Mat Sci & Engn, State Ctr Int Cooperat Designer Low Carbon & Envi, 100 Kexue Ave, Zhengzhou 450001, Peoples R China
[2] Zhengzhou Mat Genome Inst ZMGI, Bldg 2, Zhengzhou 450100, Peoples R China
[3] Zhengzhou Univ, Ctr Adv Anal & Gene Sequencing, Zhengzhou 450001, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
Al2O3; nitrogen doped vertical graphene nanosheets; reaction kinetics; sodium‐ ion batteries; ANODE MATERIAL; CARBON;
D O I
10.1002/eem2.12169
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Heteroatom doped graphene materials are considered as promising anode for high-performance sodium-ion batteries (SIBs). Defective and porous structure especially with large specific surface area is generally considered as a feasible strategy to boost reaction kinetics; however, the unwanted side reaction at the anode hinders the practical application of SIBs. In this work, a precisely controlled Al2O3 coated nitrogen doped vertical graphene nanosheets (NVG) anode material has been proposed, which exhibits excellent sodium storage capacity and cycling stability. The ultrathin Al2O3 coating on the NVG is considered to help construct an advantageous interface between electrode and electrolyte, both alleviating the electrolyte decomposition and enhancing sodium adsorption ability. As a result, the optimal Al2O3 coated NVG materials delivers a high reversible capacity (835.0 mAh g(-1)) and superior cycling stability (retention of 92.3% after 5000 cycles). This work demonstrates a new way to design graphene-based anode materials for high-performance sodium-ion batteries.
引用
收藏
页码:285 / 294
页数:10
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