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Published on: February 5, 2019
Ion-assisted construction of Sb/N-doped graphene as an anode for Li/Na ion batteries
Xiaomei Ning1, Xiaosong Zhou1, Jin Luo1
1School of Chemistry and Chemical Engineering, Key laboratory of Clean Energy Materials Chemistry of Guangdong Higher Education Institutes, Research Center for Clean Energy Materials Chemical Engineering Technology of Guangdong, Lingnan Normal University, Zhanjiang, 524048, People's Republic of China.
Abstract:
Although secondary batteries are common in many fields, new electrode materials with a reasonable structure are desired for high battery performance. Herein, Sb/N-doped graphene nanosheets (NGNS-Q) were constructed with the help of 7,7,8,8-tetracyanoquinodimethane anions (TCNQ·-). TCNQ·- were used to anchor Sb3+ into the graphene layer by electrostatic interaction, which improves the distribution of Sb nanoparticles. Meanwhile, TCNQ·- act as a N source to form N-doped graphene, enhancing the electron conductivity of the composite. Benefiting from the stable structure and good conductivity, the Sb/NGNS-Q composite achieved good electrochemical battery performance for Li/Na ion batteries (LIBs/SIBs). At a current density of 0.1 A g-1, Sb/NGNS-Q exhibited a capacity of 615 mAh g-1 after cycling 200 times and 240 mAh g-1 after 100 cycles for LIBs and SIBs, respectively.
