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Nano Research

Article Title

3D uniform nitrogen-doped carbon skeleton for ultra-stable sodium metal anode

Authors

Ben Liu, Pen-Tung Sah Institute of Micro-Nano Science and Technology, Fujian Key Laboratory of Materials Genome, College of Materials, Xiamen University, Xiamen 361005, China
Danni Lei, State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-Sen (Zhongshan) University, Guangzhou 510275, China
Jin Wang, Pen-Tung Sah Institute of Micro-Nano Science and Technology, Fujian Key Laboratory of Materials Genome, College of Materials, Xiamen University, Xiamen 361005, China
Qingfei Zhang, Pen-Tung Sah Institute of Micro-Nano Science and Technology, Fujian Key Laboratory of Materials Genome, College of Materials, Xiamen University, Xiamen 361005, China
Yinggan Zhang, Pen-Tung Sah Institute of Micro-Nano Science and Technology, Fujian Key Laboratory of Materials Genome, College of Materials, Xiamen University, Xiamen 361005, China
Wei He, Pen-Tung Sah Institute of Micro-Nano Science and Technology, Fujian Key Laboratory of Materials Genome, College of Materials, Xiamen University, Xiamen 361005, China
Hongfei Zheng, Pen-Tung Sah Institute of Micro-Nano Science and Technology, Fujian Key Laboratory of Materials Genome, College of Materials, Xiamen University, Xiamen 361005, China
Baisheng Sa, Multiscale Computational Materials Facility, College of Materials Science and Engineering, Fuzhou University, Fuzhou 350100, China
Qingshui Xie, Pen-Tung Sah Institute of Micro-Nano Science and Technology, Fujian Key Laboratory of Materials Genome, College of Materials, Xiamen University, Xiamen 361005, China
Dong-Liang Peng, Pen-Tung Sah Institute of Micro-Nano Science and Technology, Fujian Key Laboratory of Materials Genome, College of Materials, Xiamen University, Xiamen 361005, China
Baihua Qu, Pen-Tung Sah Institute of Micro-Nano Science and Technology, Fujian Key Laboratory of Materials Genome, College of Materials, Xiamen University, Xiamen 361005, China

Keywords

sodium metal anode, porous carbon skeleton, nitrogen-doping, sodium affinity, ultra-stable cyclability

Abstract

Sodium metal batteries are arousing extensive interest owing to their high energy density, low cost and wide resource. However, the practical development of sodium metal batteries is inherently plagued by the severe volume expansion and the dendrite growth of sodium metal anode during long cycles under high current density. Herein, a simple electrospinning method is applied to construct the uniformly nitrogen-doped porous carbon fiber skeleton and used as three-dimensional (3D) current collector for sodium metal anode, which has high specific surface area (1,098 m2/g) and strong binding to sodium metal. As a result, nitrogen-doped carbon fiber current collector shows a low sodium deposition overpotential and a highly stable cyclability for 3,500 h with a high coulombic effciency of 99.9% at 2 mA/cm2 and 2 mAh/cm2. Moreover, the full cells using carbon coated sodium vanadium phosphate as cathode and sodium pre-plated nitrogen-doped carbon fiber skeleton as hybrid anode can stably cycle for 300 times. These results illustrate an effective strategy to construct a 3D uniformly nitrogen-doped carbon skeleton based sodium metal hybrid anode without the formation of dendrites, which provide a prospect for further development and research of high performance sodium metal batteries.

Graphical Abstract

Publisher

Tsinghua University Press

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