Synthesis, Structure and Electrochemical Performance of Na₂MnSiO₄/C Cathode Material for Na-Ion batteries

Authors

Shou-ding LI, State Key Lab of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Jiang-huai GUO, State Key Lab of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Yong XIE, College of Energy, Xiamen University, Xiamen 361005, Fujian, China;
Jin-xiao MI, College of Materials, Xiamen University, Xiamen 361005, Fujian, China;
Yong YANG, State Key Lab of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;College of Energy, Xiamen University, Xiamen 361005, Fujian, China;Follow

Corresponding Author

Yong YANG(yyang@xmu.edu.cn)

Abstract

As a promising cathode material for sodium ion batteries, pure phase Na₂MnSiO₄/C nanocomposite was successfully synthesized by a sol-gel method with a citric acid as a complex agent. The as prepared material was characterized by XRD, FTIR, SEM and TEM techniques. XRD and Rietveld refinement results indicated that the sample was indexed as monoclinic structure with space group of Pn. It was observed by SEM and TEM that the obtained product consisted of micro-scaled secondary particles, which were composed of NaMnSiO4 nanocrystallites and amorphous carbon network. More importantly, the uniform carbon network in the nanocomposite greatly enhanced the electronic conductivity of the material, thus, resulted in the impressive electrochemical performance. The electrochemical tests showed that the Na₂MnSiO₄/C could deliver a reversible capacity of 113 mAh·g^-1 (vs. Na⁺/Na) at a current density of 14 mA·g^-1 within 1.5 ~ 4.2 V when 1 mol·L^-1 NaClO₄ + PC was used as the electrolyte.

Graphical Abstract

Keywords

Sodium ion battery, Na2MnSiO4, sol-gel method, electrochemical performance

DOI Link

https://doi.org/10.13208/j.electrochem.150422

Publication Date

2015-08-28

Online Available Date

2015-08-28

Revised Date

2015-05-28

Received Date

2015-04-22

Recommended Citation

Shou-ding LI, Jiang-huai GUO, Yong XIE, Jin-xiao MI, Yong YANG. Synthesis, Structure and Electrochemical Performance of Na₂MnSiO₄/C Cathode Material for Na-Ion batteries[J]. Journal of Electrochemistry, 2015 , 21(4): 332-335.
DOI: 10.13208/j.electrochem.150422
Available at: https://jelectrochem.xmu.edu.cn/journal/vol21/iss4/5