Superior electrochemical performance of sodium-ion full-cell using poplar wood derived hard carbon anode

By Yuheng Zheng, Yaxiang Lu, Xingguo Qi, Yuesheng Wang, Linqin Mu, Yunming Li, Q. Ma, Ju Li, Yong‐Sheng Hu. Energy Storage Materials, 2019

136 citations recorded by the source corpus.

Abstract As a supplement to lithium-ion batteries, the rate capability and cycling stability of sodium-ion batteries still need to be improved for practical applications. Here we report a novel poplar wood derived hard carbon anode, exhibiting a high specific capacity of 330 mAh/g and an initial Coulombic efficiency of 88.3% in half cells, and delivering a reversible specific energy of 212.9 Wh/kg (based on two-electrode masses) at 1 C and a long cycle life of 1200 cycles at 5 C when pairing with Na[Cu1/9Ni2/9Fe1/3Mn1/3] O 2 cathode in full cells. In addition, with the matched areal capacity of 2 mAh/cm2 and under the industrial level cathode loading of 20.5 mg/cm2, the capacity highly maintains at 2 C, and after 1400 cycles could almost fully recover by setting the current rate to C/10. This indicates sodium-ion batteries are approaching maturity.

Subfields: Automotive Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/b89d2850652bb0da58f511082d5bafb52498f586